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ART001812339 | oai_dc | DEM을 이용한 골재다짐모형 개발을 위한 기존 모형 분석 | A Study on Aggregate Particle Packing Models for Development of DEM based Model | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"윤태영(한국건설기술연구원); 김기현(한국건설기술연구원); 유평준(한국건설기술연구원); 김연복(한국건설기술연구원)"
] | PURPOSES: Determination of particle packing model variables that can be used for formulation of new DEM based particle packing model by examining existing particle packing models METHODS: Existing particle packing models are thoroughly examined by analytical reformulation and sensitivity analysis in order to set up DEM based new particle packing model and to determine its variables. All model equations considered in this examination are represented with consistent expressions and are compared to each others to find mathematical and conceptual similarity in expressions.
RESULTS: From the examination of existing models, it is observed that the models are very similar in their shapes although the derivation of the models may be different. As well, it is observed that variables used in some existing models are comprehensive enough to estimate particle packing but not applicable to DEM simulation.
CONCLUSIONS: A set of variables that can be used in DEM based particle packing model is determined | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812352 | oai_dc | 모바일 교통정보 애플리케이션의 사용의도와 만족도에 관한 연구 | A Study on Use Intention and Satisfaction of Mobile Transportation Information Applications | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이창희(명지대학교); 김명수(한밭대학교); 금기정(명지대학교)"
] | PURPOSES: Lately, a traffic information market has been developed with a rapid speed owing to information and communications. In this situation, a study on the use intention and the satisfaction of mobile transportation information applications of users will be diverse implications and a strategic foundation to local governments and transportation information related enterprises that should provide satisfactory info as public goods to much more users.
METHODS: Going along with the flow, this study establishes features of the mobile transportation information applications aiming to the users and analyzes empirical causality for effects of the use intension and the satisfaction. Through this study’s analysis, targeting users having experienced transportation information applications among smart phone users, a survey was conducted and characteristics of the transportation information applications were lighted and the effects of the use intention and the satisfaction were analyzed using a technology acceptance model.
RESULTS : The analysis result was that Accuracy, Riskiness, Ubiquity and Interactivity as all attributes of transportation information applications have a significant effect on Perceived usefulness and Perceived Ease of Use respectively. The Perceived usefulness and Perceived Ease of Use have affected significantly users’ satisfaction respectively, so consequentially this shows effect relationship leading to reuse intention.
CONCLUSIONS : The Perceived usefulness and Perceived Ease of Use all for the transportation information applications were shown to influence significantly on the satisfaction. With this kind of result, if users obtain positive outcomes such as travel time reduction or effective roles on their tasks through the transportation information applications, they feel the satisfaction for using and eventually these affect positively to the reuse intention of those transportation information applications. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812346 | oai_dc | 고분말도 혼화재를 첨가한 삼성분계 시멘트 콘크리트의 내구성 평가 | Durability Evaluation of Ternary Blend Concrete Mixtures adding Ultra Fine Admixture | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"안상혁(한국건설기술연구원); 전성일(한국건설기술연구원); 남정희(한국건설기술연구원); 안지환(한국건설기술연구원)"
] | PURPOSES: The purpose of this study is to evaluate the durability of ternary blended concrete mixtures adding ultra fine admixture.
METHODS: From the literature review, crack was considered as the main distress failure criterion on concrete bridge deck pavement. To reduce the initial crack development due to drying shrinkage, CSA expansion agent and shrink reduction agent were used to ternary blended concrete mixtures as a admixture. Laboratory tests including chloride ion penetration test, surface scaling test, rapid freeze & thaw resistance test, non restrained drying shrinkage and restrained drying shrinkage test were conducted to verify the durability of ternary blended concrete mixtures.
RESULTS: Based on the test results, proposed mixtures were verified as high qualified durable materials. Expecially initial drying shrinkage crack was not occurred in ternary blended concrete mixtures with CSA expansion agent.
CONCLUSIONS : It is concluded that the durability of proposed ternary blend concrete mixture was acceptable to apply for the concrete bridge deck pavement. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812337 | oai_dc | 콘크리트 포장의 내구성 향상을 위한 양생제 시공기술 최적화 연구 | A Study on the Optimization of Curing Technology for Improving Properties of Concrete Pavement | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박권제(한국도로공사); 류성우(한국도로공사); 김형배(한국도로공사); 주영민(중앙대학교); 조윤호(중앙대학교)"
] | PURPOSES : This study is to suggest time to spray curing compound, the amount of curing compound, and the number of times to spray curing compound based on indoor tests.
METHODS: Based on the literature review, two methods are used in this study, One is test for water retention of concrete curing material and the other is test for abrasion resistance of concrete surfaces by the rotating-cutter method. Through those methods, curing compound was evaluated.
RESULTS : The result of the laboratory experiment for time to spray curing compound indicates that 30 minutes after placing concrete is optimal. For the amount of curing compound, 0.5ℓ/m2 is the minimum quantity for both concretes. Through test of the number of times to spray curing compound, method to spray the whole amount of curing compound in twice is more efficient than it to spray the whole amount at a time. Also, method of separately 30-50 minutes spray is better than method of separately 10-30 minutes spray.
CONCLUSIONS : From the testing results, it can be proposed that optimum time to curing compound is 30±15 minutes, 0.5ℓ/m2 is efficient for spraying the whole amount of curing compound at a time, and 0.4ℓ/m2 is the best for spraying the whole amount of curing compound in twice, which sprays it in 20 minutes after 30 minutes from placing concrete. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812338 | oai_dc | 등가 구형입자를 이용한 DEM에서의 골재 슬럼프 실험 모사 | Simulation of Aggregate Slump Test Using Equivalent Sphere Particle in DEM | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"윤태영(한국건설기술연구원); 안상혁(한국건설기술연구원); 남정희(한국건설기술연구원); 유평준(한국건설기술연구원)"
] | PURPOSES: Simulation of aggregate slump test using equivalent sphere particle in DEM and its validity evaluation against lab aggregate slump test METHODS : In this research, aggregate slump tests are performed and compared with DEM simulation. To utilize spheric particles in YADE, equivalent sphere diameter concept is applied. As verification measures, the volume in slump cone filled with aggregate is used and it is compared with volume in slump cone filled with equivalent sphere particle. Slump height and diameter are also used to evaluate the suggested numerical method with equivalent concept RESULTS : Simulation test results show good agrement with lab test results in terms of loose packing volume, height and diameter of slumped particle clump.
CONCLUSIONS : It is concluded that numerical simulation using DEM is applicable to evaluate the effect of aggregate morphological property in loose packing and optimum gradation determination based on the aggregate slump test simulation result. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812336 | oai_dc | 다짐온도에서 골재 거칠기와 아스팔트 피막두께에 따른중온화 첨가제의 윤활특성 평가 | Evaluation of Lubrication Characteristics of WMA Additives for Different Roughnesses of Aggregate Surfaces and Film Thicknesses of Binders at a Compaction Temperature | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이상재(경희대학교); 조동우(한국건설기술연구원); 황성도(한국건설기술연구원); 이석근(경희대학교)"
] | PURPOSES : This study is to develop a method to evaluate lubrication of asphalt binder using WMA additives and compare their lubrication effects on two types of WMA additives and three types of asphalt film thicknesses.
METHODS : This study is based on laboratory experiments and rheological analysis of the experimental results. Testing materials are aggregate diskes, asphalt, and WMA additives. The main testing method is stress sweep test by using dynamic shear rheometer (DSR).
RESULTS : Sasobit gives more lubrication effects on film thicknesses 0.2mm and under but LEADCAP does on film thicknesses over 0.3mm.
CONCLUSIONS : LVE-Limit is a better parameter to discern the lubrication effects on the thin film asphalt thickness. Both Sasobit and LEADCAP WMA additives provide effective lubrication at the compaction temperature. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812340 | oai_dc | 수평으로 경사진 박스암거 위 콘크리트 포장 슬래브의 최적 줄눈위치 | Optimal Joint Position in Concrete Pavement Slab over Skewed Box Culvert | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"염우성(인하대학교); 정호성(인하대학교); 연우(인하대학교); 손덕수(한국도로공사); 이재훈(한국도로공사 도로교통기술원); 정진훈(인하대학교)"
] | PURPOSES : The purpose of this study is to investigate the optimal joint positions which can minimize distresses of concrete pavement containing box culvert with horizontally skewed angles.
METHODS : The concrete pavement containing the box culvert with different skewed angles and soil cover depths was modeled by 3dimensional finite element method. The contact boundary condition was used between concrete and soil structures in addition to the nonlinear material property of soil in the finite element model. A dynamic analysis was performed by applying the self weight of pavement, negative temperature gradient of slab, and moving vehicle load simultaneously.
RESULTS: In case of zero skewed angle (0。), the maximum tensile stress of slab was the lowest when the joint was positioned directly over side of box culvert. In case there was a skewed angle, the maximum tensile stress of slab was the lowest when the joint passed the intersection between side of the box culvert and longitudinal centerline of slab. The magnitude of the maximum tensile stress converged to a constant value regardless the joint position from 3m of soil cover depth at all of the horizontally skewed angles.
CONCLUSIONS: More reasonable and accurate design of the concrete pavement containing the box culvert can be possible based on the research results. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812344 | oai_dc | 고분말도 광물성 혼화재를 혼입한 삼성분계 결합재의 ASR 저항성 평가 | ASR Resistance of Ternary Blended Binder Adding Ultra Fine Mineral Admixture | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"전성일(한국건설기술연구원); 안상혁(한국건설기술연구원); 안지환(한국건설기술연구원); 윤경구(강원대학교); 남정희(한국건설기술연구원)"
] | PURPOSES: This study is to evaluate ASR(alkali silica reactivity) resistance of ternary blended binder adding ultra fine mineral admixture.
METHODS: This study analyzes ASR expansion using ASTM C 1260 and 1567.
RESULTS : This study showed that the fineness of mineral admixture had no effect on ASR expansion. The expansion of ternary blended binder(UFFA 20%+FGGBS 10%) were below 0.1%, and this binder met the ASR standard. Also when adding the CSA expansion agent, ASR expansion slightly decreased. The expansion of latex modified mixture increased by 80% comparing plain mixture.
CONCLUSIONS: Ternary blended binder met the ASR standard, and this binder is available in concrete bridge deck overlay. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812342 | oai_dc | 친환경 기능성 방음벽 | Environmental Functional Soundproof Wall | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김지성(과학기술연합대학원대학교); 이우미(한국건설기술연구원); 김일호(한국건설기술연구원); 김광수(한국건설기술연구원)"
] | PURPOSES : This study is to suggest future development direction and application of environmental noise barriers as multi-functional soundproof wall.
METHODS : Based on the literature review, case study and patent search, research and patent trend were investigated. Patent search was conducted by Patent searching tools‘, Focust’.
RESULTS : As environmental noise barriers, Vegetative soundproof wall, photovoltaic soundproof wall, and air-pollution reduction soundproof wall were investigated. First of all, In Korea, Vegetative soundproof wall is being developed mostly as soundproof wall that has vegetation foundation inside, to meet the domestic condition with 23 patent applications. Second, Photovoltaic soundproof wall is being developed mainly with efficiency of photovoltaic system rather than soundproofing. And it is limited to one generation solar cell technology, although Solar cell technology is developing at a rapid pace. On the other hand, for reducing air-pollutant by soundproof wall, a variety of methods are being suggested (filtration, adsorption, and photocatalytic oxidation), and one of them, adsorption are applied for developing air pollution reduction soundproof wall in Korea.
CONCLUSIONS: The above soundproof wall is not simple structure, but road facility applied fusion technique. Therefore, as one system, it is difficult to harmonize due to various considerations for design factor. However, if it’s possible that a benefits of one system apply to another system, Synergy effect may be created. In the foreseeable future, soundproof wall may be considered as a road system using fusion technique rather than just functional facility. Therefore, substantial studies for applying multi-functional soundproof wall on the road are needed for the future. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812343 | oai_dc | 바이오 폴리머 콘크리트의 환경 저항성 평가 연구 | A Evaluation of Environmental Resistance for Bio-Polymer Concretes | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김제원(·한국건설기술연구원); 김태우(한국건설기술연구원); 박희문(한국건설기술연구원); 김부일(한국건설기술연구원)"
] | PURPOSES: The objective of this study is to evaluate the environmental resistance of bio-polymer concrete for use of pavement materials developed for reducing the carbon-dioxide.
METHODS: The compression, tension, and bending strength tests were conducted on the bio-polymer concrete specimens with and without environmental conditioning. The specimens were conditioned using the freezing-thaw and accelerated weathering process for long period of time. To assess the resistance against chloride, the chloride ion penetration resistance tests were carried out on the bio-polymer concrete specimens.
RESULTS : Test results show that the maximum difference in strength between specimens with and without conditioning is about 2.6MPa indicating that the effect of environmental conditioning on specimen strength is negligible. Based on the chloride ion penetration resistance test,the penetration quantity of electric charge of the specimens is zero and there is no ion penetration within the bio-polymer concrete.
CONCLUSIONS: It is found from this study that there is slight change in strength of bio-polymer concretes before and after environmental conditioning process and no chloride ion penetration observed in these specimens. Therefore, the developed bio-polymer concretes can be applied effectively as pavement materials due to the small change of physical properties with environment change. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812345 | oai_dc | 국도포장 유지보수 공법 및 시기에 따른 편익산정 방안 | Methodology for Benefit Evaluation according to Maintenance Method and Timing of National Highway Pavement Section | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"도명식(한밭대학교); 권수안(한국건설기술연구원); 최승현(한밭대학교)"
] | PURPOSES : This study aims at proposing the methodology for benefit evaluations in pavement maintenance methods and timings using KoPMS(Korean Pavement Management System) software which was developed for efficient pavement management.
METHODS : This study classified pavement sections into 4 clusters considering AADT(Annual Average Daily Traffic) and ESAL(Equivalent Single-Axle Load) using cluster analysis and used the deterioration models in each cluster. Increased user costs due to pavement deterioration as time goes by and agent costs for maintenance were estimated. Based on deterioration model and KoPMS software,Methodology for benefit evaluation was proposed in pavement maintenance methods and with/without implementation using real pavement section data.
RESULTS : This study verified that considering agent costs only would be constrained to decide pavement maintenance methods and timings, and ascertained that decision making with agent and user costs would be effective. In addition, this study revealed that pavement maintenance methods and timings can be affected by AADT and ESAL and frequent pavement maintenances can be more efficient for benefits in pavement sections with more AADT and ESAL. Also this study found that user costs would be more affected to decision making than agent costs. Moreover, Delay of conducting pavement maintenance caused increased vehicle operating costs and environmental costs because of poor conditions of pavements.
CONCLUSIONS: This study proposed LCCA and benefit estimation methodology of pavement with considering agent and user costs. The results of this study can be used for baseline data of efficient pavement asset management. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812350 | oai_dc | Kiss & Ride Zone 설치에 따른 교통망 영향 분석 | Impact Analysis of Transportation Network by The Installation of Kiss & Ride Zone | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"홍기만(명지대학교); 백바름(명지대학교); 김현명(명지대학교)"
] | PURPOSES: This research is a study on the changes in the road network of the surrounding area is installed according to the Kiss & Ride Zone.
METHODS: Estimating the transportation mode of students by using the Metropolitan household Surveys(2006) and estimating the O/D by Kiss & Ride ratio with the estimated data, then being applied to a method of reducing the number of lanes for certain sections of the road which would be installed with Kiss & Ride Zone.
RESULTS : The reason why it is different for delay resolving time and the affected roads as the Kiss & Ride percentage change, was the impact of the Kiss & Ride Zone’s installation position.
CONCLUSIONS : The purpose of the study was to analyze the impact of the road network in accordance with the installation of Kiss &Ride Zone by using speed and queue delay resolving time, and it is a need to develop a quantitative evaluation technique which was using various indicators in impact analysis according to the installation of the traffic safety facilities in the future. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812353 | oai_dc | 스테레오카메라 기반 이동식 노면정보 검지시스템 개발에 관한 연구 | A Development of Stereo Camera based on Mobile Road Surface Condition Detection System | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김종훈(한국건설기술연구원); 김영민(한국건설기술연구원); 백남철(한국건설기술연구원); 원제무(한양대학교)"
] | PURPOSES: This study attempts to design and establish the road surface condition detection system by using the image processing that is expected to help implement the low-cost and high-efficiency road information detection system by examining technology trends in the field of road surface condition information detection and related case studies.
METHODS : Adapted visual information collecting method(setting a stereo camera outside of the vehicle) and visual information algorithm(transform a Wavelet Transform, using the K-means clustering) Experiments and Analysis on Real-road, just as four states(Dry, Wet,Snow, Ice).
RESULTS: Test results showed that detection rate of 95% or more was found under the wet road surface, and the detection rate of 85% or more in snowy road surface. However, the low detection rate of 30% was found under the icy road surface.
CONCLUSIONS: As a method to improve the detection rate of the mobile road surface condition information detection system developed in this study, more accurate phase analysis in the image processing process was needed. If periodic synchronization through automatic settings of the camera according to weather or ambient light was not made at the time of image acquisition, a significant change in the values of polarization coefficients occurs. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812341 | oai_dc | 경량혼합토의 도로 노상층 재료 사용 가능성 평가 | Evaluation of Lightweight Soil as a Subgrade Material | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박대욱(군산대학교); VOVIET HAI(군산대학교)"
] | PURPOSES: It is to evaluate lightweight soil as a subgrade material based on mechanical tests and calculation of pavement performance.
METHODS: In this research, various contents of cement and air foam are used to make lightweight soil using wasted dredged soil. Uniaxial compressive strength test is conducted to evaluate strength of 7 and 28 day cured specimens. Secant modulus was calculated based on the stress and strain relationship of uniaxial compressive strength test. Resilient modulus test was measured using by repeated triaxial compression test.
The measured resilient modulus was used in layered elastic program to predict fatigue and rutting life at a given pavement structure.
RESULTS : Uniaxial compressive strength increases as cement content increases but decrease as air foam content increases. Resilient modulus also increases as cement content increases and decrease as air foam content decrease.
CONCLUSIONS: It is concluded that dredge clay soil can be used as subgrade layer material using by lightweight treated soil method. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812351 | oai_dc | 이륜자동차 안전검사제도 도입 시 기대효과 분석 | An Analysis for Expected Effect of the Introduction of Motorcycle Safety Inspection | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"방수혁(한국교통연구원); 이지선(한국교통연구원)"
] | PURPOSES: This study is to analyze expected effect of a accident decrease when motorcycle safety inspection is introduced.
METHODS : Based on the literature review of effect of 4-wheel vehicle inspection, probability of occurring accidents among defective motorcycles are calculated by using the number of estimated defective motorcycles and accidents resulting from defects of motorcycles. Then,the number of decreased accidents which is resulting from eliminating defects of motorcycles by safety inspection is estimated by using probability of occurring accidents among defective motorcycles.
RESULTS : If the ratio of eliminating defects of motorcycles is 95% after motorcycle safety inspection, the effects of accident decrease of motorcycle safety inspection are analyzed from 2005 to 2008. As a result, 46,292 defective motorcycles are repaired and 1,376 accidents are prevented when the probability of occurring accidents among defective motorcycles is 2.97%.
CONCLUSIONS : This study suggests the expected effect of motorcycle safety inspection is that the inspection can prevent 1,376motorcycle accidents. However, the number of preventing motorcycle accidents are small, compared with the total number of motorcycle accidents because there are limitations to investigate the causes of defective motorcycle accidents. A more precise analysis of the expected effect of motorcycle inspection is possible when a systematic investigation of the causes of the accidents is implemented. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812357 | oai_dc | 접근로별 포화도를 고려한 Roundabout Signal Metering 운영방법에 관한 연구 | Roundabout Signal Metering Operation Methods by Considering Approach Lane’s Degree of Saturation | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"안우영(공주대학교); 이소영(국토연구원)"
] | PURPOSES: Under the capacity conditions with balanced approach flows, roundabouts give less delay than existing signalized intersections;however, flows over 450 vehicles/hour/lane with unbalanced approach flow conditions, roundabouts efficiency drops due to the short time difference between the critical gap and the follow-up headway. The purpose of this study is developing a roundabout Signal Metering operation method by considering approach lanes degree of saturation.
METHODS : A four-way-approach with one-lane roundabout is selected to compare the Signal Metering performance for the case of 16different unbalanced flow conditions. Based on these traffic conditions, the performance is evaluated for 64 different cases of Signal Metering combinations by using SIDRA software. A degree of saturation(V/C ratio) sum for two adjoined approaches is used for the performance index of choosing Metered Approach and Controlling Approach.
RESULTS : When the V/C ratio sum is 0.29~0.81 and Metered Approach flow is less than Controlling Approach flow, the average delay saving per vehicle is about 7 seconds; however, after this rage the delay saving decreases gradually until the V/C ratio sum reaches around 1.0.
The range of V/C ratio sum 0.93~1.09 provides average delay saving per vehicle about 3 seconds. In case of V/C ratio sum is grater than 1.0and the flows of Metered Approach is grater than Controlling Approach, the average delay per vehicle increases 3~11 times respectively.
CONCLUSIONS : As expected, the Signal Metering provides substantial improvements in delay saving for the case of V/C ratio sum is 0.3~1.0 under the traffic flow conditions of Metered Approach is less than Controlling Approach. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812347 | oai_dc | 화물자동차 보조 후미등화장치 설치에 따른 운전자 시인성 변화 | Legibility Change of Commercial Vehicles Equipped with the Rear Lighting System | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"조승진(네이버시스템); 이창희(명지대학교); 금기정(명지대학교)"
] | PURPOSES: The purpose of this system (Rear Lighting System) is to provide illumination for the driver to operate the commercial vehicle safely after dark in highway, to increase the conspicuity of the vehicle, and especially be suggesting the finest observable improvement method,depending on color and pattern of rear lighting system of truck for midnight highway traffic.
METHODS: Rear lightning system as an improving way for forward commercial vehicles lighting the securing sight from human factors and the surrounding environment in midnight driving. For this one, basic materials were collected from the data analysis about many types of problems, and filed investigation for establishing Driving Simulator. also taking statistic test to human volunteers after finding recognizable distance of them.
RESULTS: As a result, color with the highest visuality is amber followed by green-red-blue as in order for all road types. Especially almost no difference is found between red and green, also when the light is turn off, recognizable distances is wide difference compared to turn on the light. One more thing about study per pattern, upper and entire lighting have similar recognizable distances, but under lighting shows short distance with difficulty securing sight from medians. And straight section shows similar recognizable distances. By finding visuality improvement method depending on color and pattern of supplement taillight, it is expected to suggest quantitative judgement standard for introducing regulation and improvement of supplement taillight.
CONCLUSIONS: Night time vehicle conspicuity to the rear is provided by rear position lamps. this study is showed that the color of light ramp is not important to be safe driving, most important is to turn on the light, recognizable distances is big different compared to turn off the rear light, so when the drivng dark in highway, have to turn on the light for reducing risk. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001812356 | oai_dc | 초보운전자 생애 첫 교통법규 위반기간에 영향을 미치는 요인 | Identifying the Factors Affecting the First Traffic Violation Duration by Novice Drivers | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"강경미(서울시립대학교); 김도경(서울시립대학교)"
] | PURPOSES : This study deals with first traffic violations occurred by novice drivers, which may be associated with traffic accidents. The objective of this study is to identify what kinds of drivers’ characteristics influence on duration till the first traffic violation.
METHODS: For the study, Survival Analysis and Cox proportional hazard model, that are usually used in the medical field, were employed.
Survival Analysis was conducted to investigate whether there exist differences in survival duration by each covariate, whereas Cox proportional hazard model was used to identify significant factors that affect survival duration till novice drivers violate traffic regulations for the first time after getting a driver license.
RESULTS: The results of Survival Analysis indicate that female, age (less than 21), low-frequency examinee of written exam, and non-crash involved drivers have longer duration till the first violation compared to male, greater than 21 years old, high-frequency examinee of written exam, and crash involved drivers, respectively. For the Cox proportional hazard model, license class 1 acquisitor was found to increase the survival duration till the first traffic violation was made, while male, age of 21-24, age of 25-34, age of 45-54, and crash involved drivers were more likely to reduce the survival duration.
CONCLUSIONS: Absolutely, traffic violation is closely related to traffic accidents and all of the drivers should keep the traffic regulations to enhance highway safety. The results of this study might provide some insights to construct safe road environments by controlling the factors that reduce the traffic violation duration of novice drivers. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001667587 | oai_dc | 교통안전을 고려한 고속도로 휴게소 설계기준 개발 | Developing Design Guidelines for Rest Area Based on the Traffic Safety | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이현석(한국도로공사); 이의은(명지대학교); 서임기(한국도로공사); 박제진(한국도로공사 도로교통기술원)"
] | 휴게소 진₩출입부는 설계속도 등이 급변하는 구간으로 교통안전 취약구간이며 특히, 휴게소 진입부는 감속과 주차공간 검색두 가지 작업이 동시에 수행되므로 이용차량의 안전성을 확보할 수 있는 설계기준이 필요하다. 국내의 경우 영업소나 나들목,분기점 같은 출입시설에 대한 기하구조 기준은 수립되어 있는 반면, 도로의 부속시설인 휴게소에 대한 상세한 기하구조 기준은 없는 실정이다. 이에 본 연구에서는 일반형 휴게소 135개소를 대상으로 한 현장조사 및 사고조사 자료를 활용하여 휴게소진₩출입부 기하구조에 대한 문제점을 도출하였다. 휴게소 진₩출입부의 설계구간을 분류하고 각 구간에 대한 설계요소를 도출한 후, 휴게소 진₩출입부를 대상으로 속도조사 및 차량주행행태 조사를 수행하고 분석을 통해 설계요소별 최소 기준을 도출하였다. 진입 연결로의 시/종점 속도에 따라 감속거리 산정식을 이용하여 진입 연결로의 최소길이는 40m를 제안하였고, 주행행태를 기반으로 선형 안전성 평가를 통해 접속 설치각은 12~17。를 제안하였다. 개발된 휴게소 진입부 설계기준은 신설되는 휴게소 뿐만 아니라 기존 휴게소에 대해 현실적으로 적용 가능한 개선방안을 제시할 수 있을 것으로 판단된다 | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667574 | oai_dc | 현장시험을 통한 기초 말뚝 부마찰력의 특성과 시공관리 | Characteristics of Negative Skin Friction of Foundation Pile and Construction Management by Experimental Field Test | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"홍석우(동의대학교)"
] | 본 연구에서는 교량기초 말뚝의 부주면마찰력 시험을 통하여 연약지반에 타설된 강관말뚝의 부주면마찰력을 측정하였으며장기적인 마찰응력의 관측시험을 통하여 경제적인 상부구조물 시공시기를 판단하였다. 본 연구의 결론은 다음과 같다. (1) 연약지반에서 부마착력의 크기는 침하속도가 클수록 크게 나타났다. (2) 마찰력의 관계 그래프에서 마찰응력의 증감이 없는 시기를확인하여 상부구조물 시공시기를 판단할 수 있었다. (3) 말뚝정재하시험결과와 부주면마찰력 시험결과를 비교해 본 결과 항타직후의 부주면마찰력은 재하시험 시의 마찰응력보다 크게 나오는 것으로 판단되며 15일 경과후의 측정값은 비슷하게 나오는것으로 판단되었고, 이론식에 의한 결과와도 비슷하였다. (4) 부주면마찰력의 장기관측기법을 사용하면 부주면마찰력이 발생하고 있는 중이라도 적절한 상부구조물의 시공시기를 파악할 수 있어 경제적인 시공관리가 가능한 것으로 판단된다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667586 | oai_dc | 수요대응형 교통수단 시뮬레이션 방안: Real-Time Shared-Taxi 적용예시 | A Simulation Model for Evaluating Demand Responsive Transit: Real-Time Shared-Taxi Application | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"정재영(남가주대학 )"
] | 수요대응형 교통수단(Demand Responsive Transit)은 변화하는 이동수요에 대응하는 탄력적인 교통수단으로 단순히노약자와 장애인을 위한 복지교통 서비스의 영역이 아니라, 무선통신과 위치정보서비스(Location Based Service: LBS)의 발달로 인하여 도심형 수단으로 보다 효율적인 교통수단으로 자리매김하고 있다. 그러나 문전서비스(Door-to-Door)를제공하는 수요대응형 교통수단 시뮬레이션에 적합한 상용툴의 부재로 인하여 알고리즘이나 차량 운행 요소를 면밀하게 분석하기 힘든 어려움이 있었다. 본 연구는 수요대응형 교통수단에 연관된 다양한 차량 운영계획과 알고리즘을 구현, 평가할수 있는 시뮬레이션 환경을 제안한다. 문전서비스(Door-to-Door) 기반의 차량 운행 모형을 적용하기 위하여 확보되어야하는 시뮬레이션 입력 데이터를 정의하고 있으며, 수요대응형 교통수단의 대표적인 범주에 속하는 실시간 합승 택시(Shared-Taxi) 서비스를 서울시 교통망과 택시 수요를 이용하여 적용하였다. 합승 택시 운행 계획을 위하여 Nearest Vehicle Dispatch(NVD)와 Insertion Heuristic(IH), 두 종류의 알고리즘을 제안하였으며, 제안된 시뮬레이션을 통하여 성능을 비교하였다. 또한, 합승(Ride-sharing)을 허용하지 않는 일반적인 택시와의 비교를 통하여 시스템 효율 향상과 서비스 품질 변화를 분석하였다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667577 | oai_dc | 빈배합 콘크리트 기층용 순환골재의 이물질 품질기준 적정성 연구 | Evaluation of Impurity Content Criteria of Recycled Aggregate for Lean Concrete Base | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김남호(한국기술교육대학교); 양성철(홍익대학교)"
] | 최근 국내 석산에서의 골재공급이 부족해지면서, 성토재 등의 저급재료로 재활용 되던 폐 콘크리트 순환골재의 용도를 점차구조용 콘크리트 및 도로 포장재와 같은 고급재료로 재활용하기 위한 노력이 계속되고 있다. 이러한 노력의 일환으로 정부는2009년 순환골재 품질기준을 제정하였으며, 순환골재가 기존보다 고급재료의 용도로 활용될 수 있는 제도적 기반을 마련하였으나, 현재까지 빈배합 콘크리트 기층용으로서의 순환골재의 활용은 매우 낮은 형편이다. 본 연구는 순환골재 품질기준에 규정되어 있는 빈배합 콘크리트용 순환골재의 이물질과 관련된 품질기준의 적정성을 일련의 실험을 통하여 평가하였다. 연구결과,빈배합 콘크리트 기층용 순환골재 내의 폐 아스콘 골재는 강도에 악영향을 초래하는 반면, 아스콘의 특성으로 인하여 순환골재의 주요한 품질기준인 비중을 높이고, 흡수율 및 마모율을 오히려 낮추는 결과를 초래하여, 전체적인 순환골재의 품질을 평가하는데 큰 방해요소로 작용하였다. 따라서 이물질 함유량 기준 중, 폐 아스콘 함유량 기준은 개선의 여지가 있는 것으로 조사되어, 그 대안을 제시하였다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667583 | oai_dc | 기상조건 변화에 따른 노면표시 비드의 최적 배합비율 산정 | Optimal Mixtures of Roadway Pavement Marking Beads Under Various Weather Conditions | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이승규(아주대학교); 이승현(아주대학교); 최기주(아주대학교)"
] | 노면표시에 도포된 굴절률 1.5 유리알은 야간 우천 시 효과적인 재귀반사를 수행하지 못하여 교통안전에 심각한 문제를초래하고 있다. 이를 극복하기 위해 습윤상태에서 효과적 재귀반사를 수행하는 굴절률 2.4인 우천형 bead와 건조 시 최적의 재귀반사를 수행해 내는 굴절률 1.9 bead를 혼합한다. 그러나 고성능의 굴절률 1.9와 2.4 bead는 기존 1.5 유리알에 비해 상당한 고가이므로 전량 사용하기에는 상당한 비용이 소요된다. 따라서 현장 설치 시에는 서로 혼합하여 사용하는 것이바람직하며, 최적 성능과 소요 비용을 고려한 적정 배합비율을 찾아내는 것이 중요하다. 본 연구에서는 다양한 비율로 혼합된 bead를 국내 고속도로의 길가장자리선에 설치하였을 때 발생되는 각각의 비용 및 편익에 따른 경제성 분석을 수행하였다. 분석 수행결과, 다양한 강수량 변화에도 높은 시인성을 유지하는 대안은 굴절률 2.4가 100% 구성된 차선으로 나타났으며, 경제성이 가장 높게 확보되는 대안은 굴절률 1.5가 80%, 2.4가 20%로 구성된 차선으로 B/C는 약 1.92 수준으로 도출되어 국내 고속도로 길가장자리선의 적용 시 가장 효과적인 대안인 것으로 확인되었다. 아울러 연구의 한계와 몇몇 장래 연구과제가 토의되었다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667580 | oai_dc | Space Syntax를 이용한 한강이남 자전거도로망의 접근성 분석 | A Study on the Accessability of the Bikeway Networks in the South of the Han River Using Space Syntax | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"오충원(교통안전공단); 임동욱(교통안전공단); 김현진(교통안전공단); 박준태(교통안전공단)"
] | 서울시 간선축자전거도로의 경우 한강변을 중심으로 축이 형성되어 있어 이용자가 많은 한강변 주변에 거주자들의 이용이높은 반면, 도심지역 거주자들의 한강변자전거도로의 이용도는 낮다. 이는 한강변자전거도로를 연결하는 자전거도로와 도심지역의 자전거도로와의 연계성이 떨어지는 것으로 판단되며, 한강이남자전거도로의 접근성을 높이기 위한 정책보다는 시설위주의 정책을 시행하고 있다. 한강변자전거도로의 이용만이 아닌 서울시 자전거도로의 연계성을 높이기 위한 합리적인 개선책이필요한 시점이라 할 수 있다. 본 연구의 목적은 한강이남자전거도로를 대상으로 자전거도로의 접근성을 분석하기 위하여 한강이남지역의 공간구조를 Space Syntax Model을 이용하여 현재 및 자전거간선축설치계획 후와 일반도로설치 후를 비교하여강서·강동지역간의 연계성을 분석하고, 그에 따른 변화를 예측하는 것이다. 본 연구에서 사용된 주요 분석방법은 Space Syntax Model을 이용한 한강이남자전거도로의 특성을 분석하였다. 결과적으로, 강서·강동지역간 자전거도로 연결 시 한강이남자전거도로의 접근성은 향상하였으나, 공간구조명료도(R2)는 낮아지는 것으로 나타나 현재에 비해 지역 전체에 예측률이 낮다고 할 수 있다. 이는 현재의 한강이남자전거도로와 간선축 설치계획안·일반도로설치안 비교 시 상대적으로 가장 높은 공간구조명료도를 나타내어 자전거도로가 지역 간 연결이 이루어지기 전인 도로형태이기 때문인 것으로 분석되었다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667575 | oai_dc | 현장 탄성계수에 근거한 노상 다짐관리방안 연구 | A Study on Establishing the Subgrade Compaction Control Methods Based on the In-situ Elastic Modulus | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최준성(인덕대학); 한진석(세종대학교); 김종민(세종대학교)"
] | 1986년 AASHTO 설계법에서 회복탄성계수를 이용한 다짐관리 기법이 제안된 이후, 국내외에서 경험적 설계법에서 역학적-경험적 설계법으로 전환되고 있다. 10여년의 연구결과 노상 다짐관리는 기존의 다짐도와 평판재하시험에서 평판재하시험및 소형 충격 재하시험, 동적 콘 관입시험으로 전환되어질 예정이다. 본 연구에서는 노상 재료의 물성치와 구조해석을 통해 한국형 도로포장 설계법에서 제시된 회복탄성계수 예측식을 검증하였으며, 실제 평판재하시험, 소형충격재하시험, 동적 콘 관입시험등의 현장시험을 통해 경험적 모델로 추정된 회복탄성계수와 현장 탄성계수 측정값간의 상관관계식들을 개발하였다. 또한제안된 상관관계를 이용하여 현장시험을 통한 노상의 다짐관리방안을 제안하였다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667576 | oai_dc | 아스팔트 포장도로의 응급보수재료 평가에 관한 연구 | Evaluation on Patching Materials for Asphalt Pavement | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"심재필((주)도화엔지니어링 기술개발연구원); 진정훈((주)도화엔지니어링); 박태순(서울과학기술대학교); 이재식(인천대학교)"
] | 본 연구는 아스팔트 포장 파손을 복구하는 보수재료에 대한 연구이다. 현재 국내에서 사용되고 있는 네가지 종류 재료들에대하여 실내 및 현장시험을 실시하였다. 실내 시험으로 마샬안정도시험, 간접인장시험, 수침잔류 안정도시험, 휠트랙킹 시험을실시하였다. 또한 성능시험으로는 기존 아스팔트 콘크리트 혼합물과의 수평전단강도시험을 실시하였다. 현장시험은 아스팔트포장 도로상에서 차량바퀴가 통과하는 지점에 패칭 슬래브를 제작하여 차량 통과에 따른 공용 결과를 관찰하였다. 실내시험결과는 현재 적용되고 있는 설계 재료들의 기준은 수침잔류 안정도를 제외하고 만족하였다. Type C가 가장 높은 수평전단강도를 나타냈다. 그러나 시공후 10일 이후부터 소성변형과 탈리와 같은 파손이 발생하였다. 따라서 현재 사용되고 있는 상온보수 재료들을 현장에 적용할 경우에 우수한 성능을 기대할 수 없어서 조기파손을 방지할 수 있는 새로운 시험방법의 개발과 적용이 필요하다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667585 | oai_dc | 녹색도로 구현을 위한 기술 우선순위 결정에 관한 연구 | A Study on Technology Priorities for Green Highway | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이유화(한국건설기술연구원); 조원범(한국건설기술연구원); 김세환(한국개발연구원)"
] | 기후 변화로 인하여 발생하는 자연재해에 대한 뉴스는 더 이상 놀라운 일이 아니다. 우리나라 정부는 온실가스 특히 이산화탄소 저감에 대한 녹색기술 개발에 박차를 가하고 있다. 본 연구는 탄소 저감 및 에너지 효율화를 실현하고, 미래지향적인 녹색도로를 구현하기 위하여, 녹색도로기술을 정의하고, 기술의 우선순위를 결정하는 것을 목적으로 한다. 국내 도로와 교통 전문가 29인에게 AHP기법을 통하여 설문조사를 수행한 후에, Expert Choice 프로그램을 활용하여 선택의 가중치를 분석하였다. 생애주기변화와 도로 건설 특성을 고려한 1계층 분야와 녹색도로기술을 통하여 달성하고자 하는 목표인 2계층 분야를 구분하여 전문가들의 선택을 분석한 결과, 탄소저감과 에너지 절감을 위해서는 1계층에서는 교통운영 인프라개선, 도로교통정책, 녹색교통 순으로우선순위 가중치가 높으며, 2계층에서는 녹색도로 관련 기술 R&D투자 및 정책 지원, 녹색교통시설 설계 및 운영, 친환경 도로계획 순으로 우선순위 가중치가 높았다. 추가적으로 전문가들의 기술 우선순위와 국가 재정투자를 비교하기 위하여 2011년까지 5년간의 국토해양부 도로투자를 살펴보았다. 우리나라는 최근 도로건설에 대한 투자보다는 도로의 효율성을 강조하고 이용자의 편의를 도모하는 도로 관리로 전환하고 있는 추세다. 하지만 전문가들이 응답한 기술 목표를 달성하고 최종적으로 녹색도로 구현을위한 핵심 및 요소기술 개발과 중소기업 기반 도로 산업 육성을 위한 투자는 아직 미진하다고 볼 수 있다. 따라서 녹색도로 건설구현을 위하여 녹색도로기술 개발 R&D투자를 도모하고 상업화를 지원하는 풍토가 조성되는 것이 필요하다고 판단된다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667570 | oai_dc | 프로파일 분석을 통한 아스팔트 콘크리트 포장 텍스쳐 크기 분석 | Analysis of Texture Depth of Asphalt Pavement Based on Profile Analysis | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박대욱(군산대학교)"
] | 본 논문에서는 경량 프로파일러를 이용한 프로파일을 측정하여 매크로 텍스쳐 크기를 산정하고 분석하였다. 밀입도, 배수성,SMA, 기층 포장에 대한 프로파일을 측정하여 포장에 사용된 골재에 의한 매크로 텍스쳐 크기를 분석하였으며, 재료분리가 일어난 지역의 프로파일을 측정하여 매크로 텍스쳐 깊이를 분석하였다. 본 연구 결과 프로파일 분석을 통하여 효과적으로 매크로 텍스쳐 크기를 산정할 수 있었으며, 아스팔트 혼합물 종류별로 텍스쳐 크기를 분석할 수 있었다. 또한, 매크로 텍스쳐 크기를 산정하여 분석함으로써 재료분리가 일어난 지역을 탐지할 수 있었다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667572 | oai_dc | 동상방지층의 구조적 평가를 위한 모형 개발 | Development of Model for Structural Evaluation of Anti-Freezing Layer | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이문섭(한국건설기술연구원); 허태영(충북대학교); 박희문(한국건설기술연구원); 김부일(한국건설기술연구원)"
] | 현재 도로포장 설계법에 따르면, 동상방지층의 두께는 지역별 온도조건에 따라 결정되는 동결깊이에 의해 결정되며 동상방지층의 지지력은 설계에서 고려되지 않고 있다. 동상방지층을 도로포장체에서 구조층으로 고려할 경우에는 기존 도로포장층의 두께를 감소시킬 수 있으며 보다 경제적인 도로 포장단면을 구성할 수 있다. 본 연구에서는 동상방지층의 지지력을 평가하기 위한 통계적 모형을 개발하였다. 동상방지층의 구조적 역할을 규명하고 동상방지층 구조적 평가 모형 개발을 위하여 2m 이하 저성토부, 절토부 및 절성경계부 등을 구분하여 포장 하부층에서 Falling Weight Deflectormeter(FWD) 시험을 계절별로 수행하였다. 본 시험은 동방방지층의 유무에 따른 지지력 차이를 규명하기 위하여 동방방지층이 있는 구간과 없는 구간으로 구분하여수행하였다. 본 시험결과, 동상방지층이 설치된 구간에서의 FWD 처짐량이 동상방지층 미설치 구간에 비해 0.4~82.6% 작게측정되어 동상방지층이 포장체에서 지지력을 검증하였다. 다양한 FWD 처짐지수와 동상방지층 두께와의 상관관계를 조사한 결과, 보조기층 파손지수의 차이값(ΔBDI)과 동상방지층 두께와의 상관도가 가장 높았다. 본 논문에서는 ΔBDI값을 선형혼합효과모형에 적용하여 동상방지층을 구조적으로 평가할 수 있는 모형을 개발하였다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667578 | oai_dc | 가우시안 배경혼합모델을 이용한 Tracking기반 사고검지 알고리즘의 적용 및 평가 | Measuring of Effectiveness of Tracking Based Accident Detection Algorithm Using Gaussian Mixture Model | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"오주택(한국교통대학교); 민준영(상지영서대학교)"
] | 자동사고검지 알고리즘의 대부분은 사고가 발생했을 때 사고로 검지하지 못하고, 혼잡으로 검지하는 경우가 많다는 문제점을 가지고 있다. 또한 교통정보센터 운영자들은 교통사고검지시스템을 운영하면서 대부분 CCTV 육안감시 또는 운전자들의신고에 의존하여 사고처리를 하고 있는 실정이다. 그 이유는 현재 운영되고 있는 교통사고검지시스템에서는 실제 사고가 아닌데도 불구하고, 사고라는 오검지 경고가 많이 발생되어 시스템 전체의 신뢰도가 떨어진다는 문제점이 있기 때문이다. 다시 말해 교통사고검지시스템의 알고리즘은 검지율(Detection probability)이 높아야 함과 동시에, 오검지율(False alarm probability)은 낮아야 하고, 정확한 사고지점과 시간을 검지해 낼 수 있어야 한다. 이에 본 연구는 검지율을 높이고 동시에,오검지율을 낮추는 방법으로 기 개발된 가우시안 혼합모델(Gaussian Mixture Model)과 개별차량 Tracking을 이용하여 개발한 사고검지 알고리즘을 교통정보센터 관리시스템(Center Management System)에 적용하고, 실제 교통상황에서 사고검지율과 오검지의 빈도를 측정하여 그 효과를 검증 및 평가하고자 한다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667584 | oai_dc | 3축 가속도 시험을 통한 도로 노면의 주행 안정성 평가에 대한 연구 | Study About the Evaluation of Driving Stability Using 3-axis Accelerometer Test | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이동현(토탈페이브시스템); 김지원(토탈페이브시스템); 문성호(서울과학기술대학교); 정원석(토탈페이브시스템)"
] | 본 논문은 인체에 영향을 미치는 진동에 따라 도로노면의 주행성을 정량화하고 향후 공용중인 도로 및 신설도로의 주행 안전성 평가에 적용할 수 있는 방법론을 정립하는 것이 주요 목적이다. 이를 위해 평탄성 및 인체 피로도 관련 조사를 수행하여이론적 근거를 수립하였고 다양한 고속도로 표본 구간을 선정하여 차량 내 3축 가속도를 측정하였다. 도로 상태별로 ISO-2631에 준한 주파수별 가속도 값을 분류화함으로써 노면상태에 따른 인체에 미치는 진동 가속도 수준을 정량화할 수 있었다.
연구 결과, 전반적으로 인체에 미치는 피로도는 IRI가 높은 콘크리트 포장이 크게 유발시키는 것으로 나타났으며, SMA 포장과다이아몬드그라인딩이 적용된 콘크리트 포장은 상대적으로 피로도가 낮은 것으로 나타났다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667571 | oai_dc | 역학적-경험적 콘크리트 포장설계 프로그램의 누적피로손상 민감도 비교분석 | Comparative Analysis in Sensitivity of Cumulative Fatigue Damage of Mechanistic-Empirical Concrete Pavement Design Programs | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박주영(인하대학교); 박정우(인하대학교); 김상호(인하대학교); 유주호(인하대학교); 정진훈(인하대학교)"
] | 역학적-경험적 포장설계 프로그램 중에서, 미국 AASHTO 설계법을 기초로 개발된 MEPDG는 교통량, 기상, 재료물성,포장구조 등을 입력변수로 하여 기술자가 최적의 대안을 찾도록 한다. 하지만 MEPDG에서 기술적 문제가 발견되고 있기때문에 이를 해결하여 프로그램을 개선하기 위한 노력이 계속되고 있다. 한편, 국내에서도 KPRP 연구과제에서 역학적-경험적 포장설계 프로그램이 개발되어 왔다. 이 한국형 포장설계 프로그램을 더욱 합리적으로 개발하고 개선하기 위해서는 이미 사용되고 있는 MEPDG를 분석하여 서로 비교할 필요가 있다. 콘크리트 포장설계의 경우, 피로균열은 다른 공용성 인자와는 달리 매우 복잡한 로직을 통해 예측된다. 따라서 본 논문에서는 MEPDG 버전 0.5, 버전 1.0, 그리고 버전1.1의 피로균열 전이함수를 분석하였다. 그리고 버전별 MEPDG와 KPRP 입력변수들의 누적피로손상에 대한 민감도를서로 비교하였다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667582 | oai_dc | 고속도로 휴게시설 이용자측면의 서비스 평가지표 개발 | A Development of Evaluation Criteria for the Expressway Service Areas From Users Point of View | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김형규(한국도로공사); 최형선(한양대학교); 박완용((주)건화); 원제무(한양대학교)"
] | 본 연구는 고속도로 휴게시설 이용자측면에서 평가할 수 있는 서비스 평가모형을 개발하여 고속도로 노선별 휴게소를 평가하고 향후 모니터링 시 활용하고자 하였다. 평가지표 개발방향은 휴게소 이용자들의 필요성, 시대여건 반영, 종합 평가지표 구축, 관련연구 검토와 같이 크게 4가지 관점으로 정립한 후 기존문헌 검토 및 전문가 심층면접 토론(FGI)을 통해 1차 평가항목을 선정하고, 평가지표의 적합성 검증을 통해 최종평가지표를 도출하였다. 이용자 설문인 AHP분석을 통하여 도출된 평가항목중요도 분석결과는 시설물 측면(0.31), 서비스 측면(0.29), 운영적 측면(0.21), 환경적 측면(0.19)순으로 가중치가 도출되었다.
본 연구결과에서도 알 수 있듯이 정량적, 정성적인 인자가 함께 고려되어 실질적인 고속도로 휴게소 평가가 가능하고, 휴게소별 맞춤형 휴게소 향상 방향 제시 및 향후 모니터링을 위한 기초연구가 될 수 있을 것이다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667581 | oai_dc | 지방부 자전거도로 사업우선순위 선정 방법론에 관한 연구 | Determining Priority of the Bikeway Construction in Rural National Highway | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"전우훈(한국건설기술연구원); 이향미(한국건설기술연구원); 백남철(한국건설기술연구원)"
] | 최근 자전거이용에 대한 관심이 증가하면서, 전국적으로 자전거도로 확충을 계획하고 자전거 이용 활성화를 위해 많은 노력이 이루어지고 있으나 대부분의 계획들은 도시부와 레저형 자전거도로에 치우쳐 있다. 따라서 본 연구에서는 지방부의 생활형자전거도로 사업의 효율적인 투자를 위한 우선순위를 결정할 수 있는 평가기법을 개발하고자 한다. 먼저 평가지표 개발을 위해 지방부 생활형 자전거도로의 특성을 반영하고 정량화가 가능하여 객관적으로 평가할 수 있는 지표를 선정하였으며, 평가지표의 가중치를 산출하기 위하여 계층화분석법을 사용하였다. 또한, 평가항목의 결과만을 기준으로 사업의 우선순위를 평가할경우 대도시 중심으로 우선순위가 분포되는 경우가 발생할 것으로 판단되어 지역적 형평성(지역균형발전효과)을 고려하기 위해 지역낙후도지수를 고려하였다. 지방부 생활형 자전거도로의 우선순위를 선정하기 위해 시범 적용된 일반국도 구간은 총 23개 구간 160km의 연장으로 구성되어 있다. 본 연구에서 제시된 지방부 생활형 자전거도로 우선순위 평가방법은 지금까지 없었던 생활형 자전거도로에 대한 구체적인 판단기준을 제시하고 정책적 의사결정에 도움을 줄 것으로 기대된다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667573 | oai_dc | 서울시 배수성 아스팔트 포장의 기능적 평가 연구 | Study on the Functional Evaluation of Permeable Asphalt Concrete Pavement in Seoul City | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이상염(서울시 도로관리과); 김인태(명지대학교); 문성호(서울과학기술대학교); 권수안(한국건설기술연구원)"
] | 배수성 포장에 있어 기능적 평가인 투수성 실험과 더불어 소음저감 측정을 서울시에서 시공한 구간에서 실시하였다. 소음측정은 두 가지 방법을 이용하였는데 그 방법은 Pass-by 방법과 NCPX(Novel Close Proximity) 방법을 이용하였다. Passby 방법은 교통량에 따른 소음원이 전달되는 것을 측정하는 방법이고, NCPX는 타어어와 포장 표면간의 마찰음을 측정하는방법이다. 현장투수시험을 위해서는 총 5개의 구간에서 실시하였으며 각 구간마다 주행부와 비주행부로 나뉘어 측정하였다. 3개 구간의 Pass-by 측정을 위해서는 교통소음원 발생점으로부터 인접한 곳에서 측정을 실시하였고 또한 공원내부 혹은 단지내부에서도 소음을 측정하였다. 마지막으로 NCPX 측정은 4군데서 실시하였다. 결과적으로 배수성 포장의 기능인 투수성과 소음저감이 2, 3년 사이에서는 그 기능을 잘 유지함을 알 수 있었다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667579 | oai_dc | 고속도로 재난/재해에 따른 인접교차로 최적 운영방안 | Adjacent to the Highway Intersection, According to the Disaster, the Optimal Operating | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"강진웅((주)동해종합기술공사); 권영혁((주)경봉); 이문영(명지대학교); 최재영(명지대학교); 금기정(명지대학교)"
] | 본 연구는 기존 행정적 절차 제시에 그치고 있는 방재관련 매뉴얼의 한계를 극복하고, 공학적 접근을 통한 실질적인 방재대책 제시에 목적을 두었다. 이를 위해 고속도로 구간 내 비상재해 발생 시 우회차량에 대한 처리방안 미흡으로 생기는 교통정체현상을 해결하고자 재난/재해 지점의 인접 나들목으로 우회하는 차량들의 혼잡을 줄일 수 있는 인접교차로 운영방안을 매뉴얼화 하였다. 수도권 내 고속도로를 대상으로 유형구분에 따라 고속도로 본선 차단 시 인접교차로 운영 시점 분석 및 최적 대응방안을 분석한 결과 고속도로 재난/재해 발생 시 하부도로 진출 형태에 따라 교차로 운영시점이 다르게 나타났다. 분석 결과에 따라 재난/재해 발생 동시에 각 지점 특성에 맞는 교통조건 기하조건을 파악하여 인접교차로 운영 방안을 판단하고 언론및 운전자에게 홍보할 수 있는 체계를 구축한다면 긴박한 유고상황에서 신속한 초기대응과 운전자들의 안전을 확보할 수 있을것으로 판단된다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001667561 | oai_dc | 플라이애시와 질산리튬을 사용한 시멘트 경화체의 ASTM C 1260 적용성 검토 | Application of ASTM C 1260 for Cement Matrix Mixed with FlyAsh and Lithium Nitrate | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김성권(강원대학교); 윤경구(강원대학교); 홍승호(한국도로공사 도로교통기술원); 강문식(한국도로공사)"
] | 본 논문에서는 ASTM C 1260을 이용하여 국내산 골재를 대상으로 알칼리-실리카 반응 판정 결과 반응성으로 판정된 골재를 대상으로 알칼리-실리카 반응 억제효과를 고찰하기 위하여 플라이애시와 질산리튬을 사용한 시멘트 경화체의 ASTM C 1260 적용성을 평가하였다. 알칼리-실리카 반응에 의한 팽창현상이 발생하는 지역에서 CaO 함량이 낮은 플라이애시를 시멘트 중량의 10, 20, 30%를 대체하는 경우 ASTM C 1260으로 알칼리-실리카 반응 억제효과를 확인할 수 있었다. 그러나 질산리튬을 사용할 경우는 ASTM C 1260은 시편을 1N NaOH 수용액에 수침하여 80℃의 온도로 길이변화를 유도하므로 시편내에 혼입된 질산리튬 성분이 외부로 용출될 수 있기 때문에 알칼리-실리카 반응 억제효과를 도출하지 못하였다. 따라서 질산리듐의 ASR 억제효과를 확인하기 위해서는 다른 시험방법을 고려해야 한다. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001792809 | oai_dc | DSR을 이용한 온도변화에 따른 중온화 첨가제의 다짐특성 연구 | Study of WMA Additive's Compaction Characteristics in Terms of Temperature Change by Using DSR | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"황성도(한국건설기술연구원); 이상재(경희대학교); 조동우(한국건설기술연구원); 이석근(경희대학교)"
] | PURPOSES : This study is to develop a method to evaluate the compaction effects of asphalt binders using WMA additives and compare their compaction effects on two types of WMA additives, two types of testing temperatures, and three types of asphalt film thicknesses.
METHODS : This study is based on laboratory experiments and rheological analysis of the experimental results. Testing materials are aggregate disks, asphalt, and WMA additives. The main testing method is the stress sweep test by using dynamic shear rheometer (DSR). In addition, the testing parameters obtained from the stress sweep results to evaluate lubrication effects are complex modulus and LVE-Limit.
RESULTS : At both the first compaction condition (110℃, 0.3mm) and second compaction condition (80℃, 0.2mm) assumed, LEADCAP showed better compaction effects than Sasobit.
CONCLUSIONS : The temperature 30℃ lower than general compaction temperatures can provide a better sensitivity for the evaluation of compaction effects. If a testing temperature and film thickness are grouped for the proper compaction conditions in the testing results, the compaction performance of each WMA additive can be more clearly discriminated in the grouped testing results matched with the grouped conditions. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792825 | oai_dc | 초고속 주행환경에서의 종단경사 설계기준에 관한 기초연구 | Theoretical Review on the Vertical Geometric Design Standards for High-speed Roadway | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"송민태(평화엔지니어링); 강호근(평화엔지니어링); 김흥래((주)평화엔지니어링); 이의준(한국도로공사); 신준수(한국도로공사); 김종원((주)평화엔지니어링)"
] | PURPOSES: The purpose of this study theoretically reviews vertical grade deriving process in super high speed environment and compares overseas design criteria with Domestic Standardization also draws suitable vertical grade design criteria of high standard for Domestic Circumstances in Korea.
METHODS : By researching domestic vehicle registration status, calculating typical vehicle, using Vissim which is traffic simulation program, Speed-distance curve of the vehicle is derived under each design speed condition. Through Speed-distance curve, estimating critical length of grade and considering critical length of grade, maximum longitudinal incline is proposed.
RESULTS : The result of domestic vehicle registration status, the typical vehicle for deriving vertical grade is calculated based on gravity horsepower ratio 200 lb/hp. For calculating critical length of grade, according to change speed of uphill entry, speed-distance curve is derived by using Vissim. Critical length of grade is calculated based on design speed 20 km/h criteria which is point of retardation. Estimated critical length of grade is 808 m and based on this result, maximum longitudinal incline was confirmed in the design speed between 130km/h to 140km/h.
CONCLUSIONS: The case of the typical vehicle(truck) which is gravity horsepower ratio 200 lb/hp, maximum longitudinal incline 2% is desirable at the super high speed environment in the design speed between 130km/h to 140km/h. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792816 | oai_dc | 콘크리트포장 위 아스팔트 덧씌우기용 택코팅 재료의 접착강도특성 연구 | Investigation into Bonding Characteristics of Tack Coat Materials for Asphalt Overlay on Concrete Pavement | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"조문진(한국도로공사 도로교통연구원)"
] | PURPOSES: The performance of tack coat, commonly used for layer interface bonding, is affected by application rate and curing time. In this study, bonding strength tests were performed according to the application rate and curing time of asphalt emulsion. Based on finding from this study, optimum application rates and curing times are proposed.
METHODS: In order to investigate bonding characteristic of asphalt emulsion, tests were performed on both asphalt concrete pavement and portland concrete pavement. Also, asphalt emulsions were tested at the application rate of 0, 0.2, 0.4, 0.6, and 0.8ℓ/m2 and at the curing time of 0, 0.5, 1, 2, and 24 hours. Pull-off test and shear bonding strength test, which commonly used for bonding strength measurement of asphalt emulsion, were adopted for this study. To assess field performance under different testing condition, asphalt emulsions were applied to inservice pavement. Throughout coefficient of determination analysis between material index properties from asphalt emulsion and mechanical response from bonding strength tests, performance correlativity was analyzed.
RESULTS: Test results show that optimum application rate for asphalt overlay on asphalt concrete pavement (AOA) and asphalt overlay on concrete pavement (AOC) was 0.4~0.5ℓ/m2 and 0.3~0.5ℓ/m2, respectively. According to the curing time increment, tensile strength and shear strength of AOC were increased to 22~44% and 20~39%, respectively. AOA case also show strength increment in tensile strength (42%) and shear strength (9%). We tested the applicability of tack coat materials at the field sites, and our findings demonstrated that the bonding (for D and E) and rapid curing (for B, C, and D, E) performances were superior than others. Among material index properties, there was a high correlation between penetration ratio and bonding strength test result.
CONCLUSIONS : Result show that interlayer bonding strength was affected by asphalt emulsion type, application rate and curing time.
AOC required slightly higher application (0.1ℓ/m2) than AOA. Both AOA and AOC cases show higher strength at longer curing time. Up to 2hours of curing, rapid strength increments were observed, but strength increment ratio was decreased after 2hours of curing. From the observed correlation between penetration ratio and bonding strength, it is expected that penetration ratio can be used as one of important factors affecting bonding strength analysis. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792817 | oai_dc | 도로 종단선형에 따른 도로교통 소음 특성 분석 | Characteristic of Road Traffic Noise According to Road Vertical Alignment | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"문학룡(한국건설기술연구원); 한대철(한국건설기술연구원); 강원평(한국건설기술연구원)"
] | PURPOSES: The purpose of this study is to research the influence of road traffic noise by road slope through the analysis of the field road traffic noise and determine consideration of road slope in the case of appling active noise cancellation.
METHODS: This study measures vehicle’s noise by the NCPX method at the three field sections such as uphill, downhill, and flatland. Total sound pressure and sound pressure level by the 1/3 octave band frequency are calculated through the raw field data. Total sound pressure level is compared by ANOVA test and T test statistically. The results obtained are compared in accordance with the road slope and the progress of the uphill section.
RESULTS : The noise characteristic of early, medium, and last parts of uphill was found to be consistent when the vehicle was travelling uphill section. The result of statistical test, it was shown that total sound pressures are not different each other. According to the comparison by the geometry, sound pressure of the uphill section was higher than those of the flatland and downhill section in high frequency band. By the result of statistical test, total sound pressure are different according to geometry in the case of high vehicle speed. In the comparison result by road slope, each sound pressure level was found to be consistent in total frequency. However, total sound pressure proportionally increased according to road slope.
CONCLUSIONS: It is found that the effect of road slope on noise generation was little in this experimental sites. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792824 | oai_dc | 미시적 탄소배출량 및 대기확산 모형을 이용한 이동오염원에 의한 대기 질 영향 분석 | Impact Analysis of Air Quality of Mobile Sources using Microscopic Emission and Dispersion Model | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"양충헌(한국건설기술연구원); 양인철(한국건설기술연구원); 윤천주(한국건설기술연구원); 성정곤(한국건설기술연구원)"
] | PURPOSES : The objective of this study is to investigate the capability of the combined model of traffic simulation, emission and air dispersion models on the impact analysis of air quality of mobile sources such as vehicles.
METHODS : The improvement of the quality of life brings about the increasing interest of the public environment. Many endeavors including the travel demand management, the application of the state-of-the-art ITS technologies, the promotion of eco-friendly vehicles have been tried in transportation area to reduce the modal emissions. Especially, it is expected that the increasing number of eco-friendly vehicles in the road network would be able to reduce the pipe-tail emissions tremendously. From this perspective, we have performed a study on the impact analysis of the popularization of the eco-friendly vehicle in the place of the fossil fuel energy powered vehicles on the surrounding air quality using the combined framework of microscopic traffic simulation, emission and air dispersion model.
RESULTS : The combined model successfully captured the effect of moving to the eco-friendly vehicles on the air quality, and the results showed that the increasing usage of eco-friendly vehicles can improve the surrounding air quality tremendously and that the air dispersion model plays a crucial role in the investigation of the air quality change around the main corridor.
CONCLUSIONS : This study demonstrated the capability of the combined model showing the spatio-tempral change of emission concentration. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792815 | oai_dc | 도로 기하구조에 따른 차량 Microphone 위치별 소음 영향 분석 | Analysis of Vehicle Noise Effect by Microphone Position and Road Geometry | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"문학룡(한국건설기술연구원); 한대철(한국건설기술연구원); 강원평(한국건설기술연구원)"
] | PURPOSES: The purpose of study is to understand the characteristic of driving noise from the front and rear tire for effective active noise cancellation application.
METHODS : As literature review, noise measurement methods were reviewed. Noise measurement conducted at three kind of section by road slope using CPX(Close Proximity Method). Noise data was compared by total sound pressure level and 1/3 octave band frequency sound pressure level. Also, each section was compared by T-test using SPSS.
RESULTS : In the case of the uphill section, it was shown that the sound pressure level of the front tire at Sugwang-Ri and Sinchon-RI sections was higher than that of the rear tire in low and high frequency band. In the case of high slope section of Sangsaek-Ri, the sound pressure level of the front tire was higher than that of the rear tire in high frequency. Also, in the case of the downhill section, it was shown that the sound pressure level of the front tire at Sugwang-Ri and Sinchon-RI sections was higher than that of the rear tire in low frequency band.
However, the sound pressure levels of both the front and rear tires were approximately the same in the high slope section of Sangsaek-Ri. The result of T-test showed that total sound pressures of the front and rear tires were not different from each other in the case of high slope and high speed.
CONCLUSIONS: Road slope was not an important variable for effective active noise cancellation. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792810 | oai_dc | NCPX 계측 방법에 따른 속도별 소음 데시벨 예측 모델 개발에 대한 연구 | A Study on Development of a Prediction Model for the Sound Pressure Level Related to Vehicle Velocity by Measuring NCPX Measurement | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김도완(서울과학기술대학교); 안덕순(한국건설기술연구원); 문성호(서울과학기술대학교)"
] | PURPOSES : The objective of this study is to provide for the overall SPL (Sound Pressure Level) prediction model by using the NCPX (Noble Close Proximity) measurement method in terms of regression equations.
METHODS: Many methods can be used to measure the traffic noise. However, NCPX measurement can powerfully measure the friction noise originated somewhere between tire and pavement by attaching the microphone at the proximity location of tire. The overall SPL(Sound Pressure Level) calculated by NCPX method depends on the vehicle speed, and the basic equation form of the prediction model for overall SPL was used, according to the previous studies (Bloemhof, 1986; Cho and Mun, 2008a; Cho and Mun, 2008b; Cho and Mun, 2008c).
RESULTS : After developing the prediction model, the prediction model was verified by the correlation analysis and RMSE (Root Mean Squared Error). Furthermore, the correlation was resulted in good agreement.
CONCLUSIONS: If the polynomial overall SPL prediction model can be used, the special cautions are required in terms of considering the interpolation points between vehicle speeds as well as overall SPLs. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792821 | oai_dc | 전방신호기가 교통사고에 미치는 영향 연구 | Impacts of Pre-signals on Traffic Crashes at 4-leg Signalized Intersections | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김병은(도로교통공단); 이영인(서울대학교)"
] | PURPOSES : This study aimed to analyze the impact the operation of pre-signals at 4-leg signalized intersections and present primary environmental factors of roads that need to be considered in the installation of pre-signals.
METHODS : Shift of proportions safety effectiveness evaluation method which assesses shifts in proportions of target collision types to determine safety effectiveness was applied to analyze traffic crash by types. Also, Empirical Bayes before/after safety effectiveness evaluation method was adapted to analyze the impact pre-signal installation. Negative binomial regression was conducted to determine SPF(safety performance function).
RESULTS : Pre-signals are effective in reducing the number of head on, right angle and sideswipe collisions and both the total number of personal injury crashes and severe crashes. Also, it is deemed that each factor used as an independent variable for the SPF model has strong correlation with the total number of personal injury crashes and severe crashes, and impacts general traffic crashes as a whole.
CONCLUSIONS: This study suggests the following should be considered in pre-signal installation on intersections. 1) U-turns allowed in the front and rear 2) A high number of roads that connect to the intersection 3) Many right-turn traffic flows 4) Crosswalks installed in the front and rear 5) Insufficient left-turn lanes compared to left-turn traffic flows or no left-turn-only lane | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792812 | oai_dc | 중온화 첨가제를 사용한 중온 재생 아스팔트 혼합물 평가 | Evaluation of Warm-Recycled Asphalt Mixtures using Polyethylene Wax-Based Additive | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이진욱(한국건설기술연구원); 이문섭(한국건설기술연구원); 김용주(한국건설기술연구원); 조동우(한국건설기술연구원); 권수안(한국건설기술연구원)"
] | PURPOSES : The main purposes of this study are to examine the influences of polyethylene wax-based WMA additive on the optimum asphalt content of warm-recycled asphalt mixture based on the Marshall mix design and to evaluate performance of warm-recycled asphalt mixture containing 30% RAP with polyethylene wax-based WMA additive.
METHODS: Physical and rheological properties of the residual asphalt were evaluated in terms of penetration, softening point, ductility and performance grade (PG) in order to examine the effects of polyethylene wax-based WMA additive on the residual asphalt. Also, To evaluate performance characteristics of the warm-recycled asphalt mixtures using polyethylene wax-based WMA additive along with a control hotrecycled asphalt mixture, indirect tensile strength test, modified Lottman test, dynamic immersion test, wheel tracking test and dynamic modulus test were conduced in the laboratory.
RESULTS : Based on the limited laboratory test results, polyethylene wax-based WMA additive is effective to decrease mixing and compacting temperatures without compromising the volumetric characteristics of warm-recycled asphalt mixtures compared to hot-recycled asphalt mixture. Also, it doesn't affect the optimum asphalt content on recycled-asphalt mixture. All performance test results show that the performance of warm-recycled asphalt mixture using polyethylene wax-based WMA additive is similar to that of a control hot-recycled asphalt mixture.
CONCLUSIONS: Overall, the performance of warm-recycled asphalt mixture using polyethylene wax-based WMA additive is comparable to hot-recycled asphalt mixture. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792819 | oai_dc | 중온화 첨가제 첨가비율에 따른 현장 적용성 평가 및 실내 역학적 거동 특성 연구 | Evaluation of Field Application and Laboratory Performance of Warm-Mix Asphalt According to the Dosage Rate of Additive | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"양성린(한국건설기술연구원); 백철민(한국건설기술연구원); 황성도(한국건설기술연구원); 권수안(한국건설기술연구원)"
] | PURPOSES : The purpose of this study is to evaluate of field application and laboratory performance of warm-mix asphalt (WMA)according to the dosage rate of organic-based WMA additive.
METHODS: Three asphalt mixtures, i.e., hot mix asphalt (HMA), WMA with the dosage rate of 1.5%, WMA with the dosage rate of 1.0%,were sampled from the asphalt plant when the field trial project were constructed. With these mixtures, the laboratory testings were performed to evaluate the linear viscoelastic characteristics and the resistance to moisture, rutting and fatigue damage.
RESULTS : From the laboratory test results, it was found that the WMA with the reduced dosage rate of additive would be comparable to HMA and WMA with the original dosage rate in terms of the dynamic modulus, tensile strength ratio, rutting resistance. However, the fatigue reisistance of WMA with the reduced dosage rate was slightly worse but it should be noted that the fatigue performance is necessarily predicted by combining the material properties and pavement structure.
CONCLUSIONS: Through the field construction and laboratory testings, the dosage rate of organic-based WMA additive could be reduced from 1.5% to 1.0% without the significant decrease of compactability and laboratory performance. The long-term performance of the constructed pavement will be periodically monitored to support the findings from this study. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792820 | oai_dc | SB2등급 연성베리어의 충돌지점(CIP)에 대한 연구 | Study on Critical Impact Point for a SB2 Class Flexible Barrier | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"허연희(공주대학교); 김용국(한국철도기술연구원); 고만기(공주대학교); 김기동(공주대학교)"
] | PURPOSES : The impact performance of flexible barrier system such as structural response, vehicular motion and occupant safety vary depending on the impact point. Thus, to properly evaluate the performance of a flexible barrier system, impact should be made to a point which will lead to the worst possible results. This point is called the Critical Impact Point (CIP). This paper presents the way to determine the CIP for a SB2 class flexible barrier system which is consisted of Thrie-Beam rail and circular hollow tube post of 2m span.
METHODS: Barrier VII simulations were made for impact points; Case 1 at a post, Case 2 at 1/3 span downstream from a post, Case 3 at middle of the span, Case 4 at 2/3 span downstream from a post. For the structural performance (deflections), impact simulation of 8000kg-65km/h-15degree was used, and for vehicle motion and occupant safety, simulation of 1300kg-80km/h-20degree impact was made and analysed.
RESULTS: Case 1 gave the largest dynamic deflection of 75.72cm and also gave the largest snag value of 44.3cm. Occupant safety and exit angle of the vehicle after the impact were not sensitive to the impact point and were all below the allowable limit.
CONCLUSIONS : For the SB2 class flexible barrier system's CIP can be regarded as a post which is sufficiently away from the end of Length of Need in order to avoid the end-effect of the barrier system. It can be more economic in the long run because the normal concrete pavement material is likely to cost more due to higher probability of maintenance and repair and higher social cost due to traffic accident, etc. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792811 | oai_dc | NCPX 계측방법을 이용한 타이어/노면 사이에서 발생하는 마찰소음에 대한 차량자체에서 발생하는 소음 제거 연구 | A Study of Eliminating the Vehicle Noise of Engine RPM from the Friction Noise between Tire and Road Pavement by Using a NCPX Method | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"한봉구(서울과학기술대학교); 김도완(서울과학기술대학교); 문성호(서울과학기술대학교); 김하연(서울과학기술대학교)"
] | PURPOSES : The purpose of this study is to eliminate the noise of the vehicle after measuring the friction noise obtained from the NCPX (Noble Close ProXimity) method. The pure friction noise between the tire and road pavement could be determined from filtering the compositeness of sound and the influence of the vehicle noise.
METHODS: The noise magnitude could be determined by analyzing the sound pressure level (SPL) and sound power level (PWL) along with the noise frequency of a FFT (Fast Fourier Transform) analysis as well as CPB (Constant Percentage Bandwidth) analysis.
RESULTS: When the test for measuring the friction noise originated somewhere between tire and road pavement is performed with NCPX method, it must be fulfilled by attaching the surface microphone near the tire. In this condition, the surface microphone can measure the friction noise occurred at between tire and pavement, the chassis noise from the engine and power transfer units, the fluctuating aerodynamic noise, and the turbulence noise directly affected to the surface microphone. By using the NCPX method, the noise occurred at the vehicle must be eliminated for measuring the friction noise between tire and pavement from the traffic noise.
CONCLUSIONS: The vehicle's testing engine noise depends on the vehicle and road types. The effect of vehicle's engine noise is less than the friction noise occurred at between tire and pavement at less than 1% effect. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792818 | oai_dc | 중온화 액상형 화학첨가제 개발과 이를 적용한 중온 아스팔트의 성능 평가 | Development and Performance Evaluation of Liquid-type Chemical Additive for Warm-Mix Asphalt | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"백철민(한국건설기술연구원); 양성린(한국건설기술연구원); 황성도(한국건설기술연구원)"
] | PURPOSES: The liquid-type chemical warm-mix asphalt (WMA) additive has been developed. This study evaluates the basic properties of the additive and the mechanical properties of WMA asphalt and mixture manufactured by using the newly developed chemical additive.
METHODS: First, the newly developed WMA additive was applied to the original asphalt by various composition of additive components and dosage ratio of additive. These WMA asphalt binders were evaluated in terms of penetration, softening point, rotational viscosity, and PG grade. Based on the binder test results, one best candidate was chosen to apply to the mixture and then the mechanical properties of WMA mixture were evaluated for moisture susceptibility, dynamic modulus, and rutting and fatigue resistance.
RESULTS : According to the binder test, WMA asphalt binders showed the similar properties to the original asphalt binder except the penetraion index of WMA additive was a little higher than original binder. From the Superpave mix design, the optimum asphalt content and volumetric properties of WMA mixture were almost the same with those of hot mix asphalt (HMA) mixture even though the production and compaction temperatures were 30℃ lower for the WMA mixture. From the first set of performance evaluation, it was found that the WMA mixture would have some problem in moisture susceptibility. The additive was modified to improve the resistance to moisture and the second set of performance evaluation showed that the WMA mixture with modified chemical additive would have the similar performance to HMA mixture.
CONCLUSIONS : Based on the various laboratory tests, it was concluded that the newly developed chemical WMA additve could be successfully used to produce the WMA mixture with the comparable performance to the HMA mixture. These laboratory evaluations should be confirmed by applying this additive to the field and monitoring the long-term performance of the pavement, which are scheduled in the near future. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792808 | oai_dc | 접착식 콘크리트 덧씌우기의 부착강도 특성 분석 | Bond Strength Characteristics of Bonded Concrete Overlay | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박종원(강릉원주대학교); 김영규(강릉원주대학교); 이승우(강릉원주대학교); 한승환(한국도로공사)"
] | PURPOSES : Bonded concrete overlay is a favorable maintenance method since the material properties are similar to existing concrete pavements. In addition, bonded concrete overlay has advantage of structural performance since the overlay layer and the existing pavement perform as a monolithic layer. It is important to have suitable bond strength criteria to secure the performance of bonded concrete overlay. This study aimed to investigate the factors influencing bond strength characteristics between existing concrete pavement and overlay material.
METHODS: Bond strength between overlay and existing pavement are measured and analyzed for various conditions such as the type of overlay materials, compressive and flexure strength of overlay and existing pavement, and deterioration status of existing pavement.
RESULTS: The strength of overlay material does not significantly influence the bond strength. The overlay of ultra-rapid hardening cement generally gives low bond strength. However, ultra rapid hardening polymer modified concrete gives robust bond strength. The deterioration of existing concrete significantly decrease the bond strength.
CONCLUSIONS: Bond strength of bonded concrete overlay highly depends on condition of existing concrete pavement rather than overlay material. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792814 | oai_dc | 공항포장 시멘트안정처리기층에 적용하기 위한 투수콘크리트 개발에 관한 기초연구 | Fundamental Study on Pervious Concrete Materials for Airport Pavement Cement Treated Base Course | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김승원(강원대학교); 오지헌(강원대학교); 장봉진(강원대학교); 주민관(강원대학교); 김인태(명지대학교); 박철우(강원대학교)"
] | PURPOSES : As a research to develop a cement treated base course for an airport pavement which can enhance its drainage, this paper investigated the strength, infiltration performance and durability of the pervious concrete with respect to maximum coarse aggregate sizes and compaction methods.
METHODS : This study measured compressive strength, infiltration rate, continuous porosity and freeze-thaw resistance of pervious concrete specimens, which were fabricated with five different compaction methods and different maximum aggregate sizes. In addition, in order to reduce the usage of Portland cement content and to enhance environment-friendliness, a portion of the cement was replaced with Ground Granulated Blast Furnace Slag (GGBS).
RESULTS: Compressive strength requirement, 5 MPa at 7 days, was met for all applied compaction methods and aggregate sizes, except for the case of self-compaction. Infiltration rate became increased as the size of aggregate increased. The measured continuous porosities varied with the different compaction methods but the variation was not significant. When GGBS was incorporated, the strength requirement was successfully satisfied and the resistance to freezing-thawing was also superior to the required limit.
CONCLUSIONS: The infiltration rate increased as the maximum size of aggregate increased but considering construct ability and supply of course aggregate, its size is recommended to be 25mm. With the suggested mix proportions, the developed pervious concrete is expected to successfully meet requirements for strength, drainage and durability for cement treated base or subbase course of an airport pavement. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792822 | oai_dc | 교차로에서 운전자별 온실가스 발생 경향 | Greenhouse Gas Emission Patterns at Intersections by Drivers | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이윤석(한국도로공사 도로교통연구원); 유혜민(경기대학교); 오흥운(경기대학교)"
] | PURPOSES: To analyze the specific factors of drivers behaviors that amount of cause the greenhouse gas emissions per vehicle.
METHODS: Drivers behaviors at intersections are analyzed on the conditions of acceleration and deceleration.
RESULTS : First, it is resulted greenhouse gas emissions per vehicle is produced more at intersections than at the main lines of highway.
Second, it is resulted that the average speed, the average acceleration rate and the maximum speed are three major factors to produce greenhouse gas per vehicle in acceleration sections. Third, it is resulted that rapid deceleration 20m before entering intersections is the major factor to produce greenhouse gas per vehicle in deceleration sections.
CONCLUSIONS: At intersections, sudden acceleration and deceleration is not good for greenhouse gas emissions. Thus, and the average speed, the average acceleration rate and the maximum speed are the chosen as factors to be controlled for drivers' behavior to reduce vehicles'greenhouse gas at intersections. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792813 | oai_dc | 노후 콘크리트 포장 절삭 덧씌우기의 침투수에 의한 파손 최소화 방안 연구 | A Study on the Minimization of Water Damage for the Asphalt Inlay of Old Concrete Pavement | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"강원평(한국건설기술연구원); 염광재((주)삼우IMC); 서영찬(한양대학교); 이경하(한국도로공사 도로교통기술원); 강민수(한국도로공사)"
] | PURPOSES: The purpose of this study was to investigate the disintegration mechanism of concrete due to the infiltration of the moisture to the milling overlay pavement and to come up with a method to minimize the disintegration as well as verifying the effectiveness of the edge sealing and Fogseal method.
METHODS : This study investigated the distress mechanism due to the infiltrated moisture remaining in the milling overlay pavement through chloride freezing test and verified the effectiveness of the sealing of the milling edge and fog seal methods, which have been devised to minimize the moisture infiltration, through laboratory water permeability test. Additionally, long-term pavement performance was compared for the effectiveness of the proposed method through under loading test, and field water permeability test was carried out to verify the field applicability of the proposed method.
RESULTS: The result of the research confirmed that chloride deteriorates the concrete surface through disintegration and lowers its strength and that the laboratory moisture infiltration test verified the effectiveness of the milling edge sealing and fog seal methods in the deterrence of moisture infiltration to the overlay pavement with excellent long-term performance of the pavement treated with the proposed method.
Although the field water permeability test revealed some deterrence of moisture infiltration of the milling edge sealing and fog seal methods to a certain extent, the difference was a little.
CONCLUSIONS: The milling edge sealing and fog seal methods are limited in their effectiveness for the cases of improvident compaction management or mixture with large void, and it is believed that installation of subsurface drainage is more effective in these cases. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001792823 | oai_dc | 통행시간 신뢰성 가치에 관한 연구 | A Study of the Value of Travel Time Reliability | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"조한선(한국교통연구원)"
] | PURPOSES : Benefits for improvement of travel time reliability obtained from construction of new highways should be considered as a major factor in the feasibility study for highway constructions. The purpose of this study is to develop a method of estimation for the value of travel time reliability.
METHODS : Highway type (urban/rural highway) and traffic flow type(interrupted/uninterrupted) was considered to estimate he value of travel time reliability. And Double-bounded Dichotomous Choice among Contingent Valuation Method(CVM) was applied to survey the willingness-to-pay of drivers when travel time reliability is improved. Finally the value of travel time reliability was estimated using the results of survey and logit model.The value of travel time reliability was estimated considering travel objectives, time constraint travel and non-time constraint travel.
RESULTS: The value of travel time reliability of business trip is higher than that of non-business trip. The value of travel time reliability of time constraint travel is higher than that of non-time constraint travel. The value of travel time reliability in urban area is higher than that in rural area.
CONCLUSIONS: It was concluded that the proposed method in this study is more realistic and proper to estimate the value of travel time reliability because it reflects the situations of time constraint travel and non-time constraint travel. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705030 | oai_dc | 시간-온도 중첩이론을 적용한 아스팔트 바인더의 점소성 구성 모형 | A Viscoplastic Constitutive Model Based on Overstress Concept with Time- Temperature Superposition Principle | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"윤태영(한국건설기술연구원); 엄병식(한국건설기술연구원); 유평준(한국건설기술연구원); 김연복(한국건설기술연구원)"
] | PURPOSES : Suggestion of asphalt binder constitutive model based on time-temperature superposition principle and overstress concept in order to describe behavior of asphalt binders.
METHODS : A series of temperature sweep tests and multiple stress creep and recovery(MSCR) tests are performed to verify the applicability of time-temperature superposition principle(t-Ts) and to develop viscoelastoplastic constitutive equation based on overstress concept. For the tests, temperature sweep tests at various high temperature and various frequency and MSCR test at 58℃, 64℃, 70℃, 76℃, and 82℃ are performed. From the temperature sweep tests, dynamic shear modulus mastercurve and time-temperature shift function are built and the shift function and MSCR at 58℃ are utilized to determine model coefficients of VBO model.
RESULTS: It is observed that the time-temperature shift function built at low strain level of 0.1% is applicable not only to 1.0% strain level temperature sweep test but also maximum 500,00% strain level of MSCR test. As well, the modified VBO model shows perfect prediction on MSCR measured strain at the other temperatures.
CONCLUSIONS: The Time-temperature superposition principle stands hold from very low strain level to very high strain level and that the modified VBO model can be applicable for various range of strain and temperature region to predict elastic, viscoelastic, and viscoplastic strain of asphalt binders. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705025 | oai_dc | 다기능 복합 포장용 섬유보강 콘크리트 기층 재료의 역학적 특성평가 | Mechanical Performance of Fiber Reinforced Lean Concrete for Subbase of Newly Developed Multi-Functional Composite Pavement System | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"박철우(강원대학교); 장영재(강원대학교); 박영환(한국건설기술연구원); 정우태(한국건설기술연구원); 최성용(한국건설기술연구원); 유평준(한국건설기술연구원)"
] | PURPOSES: This study is to investigate the mechanical performance of the fiber reinforced lean concrete with respect to different types of fibers.
METHODS: Increased vehicle weight and other causes from the exposed conditions have accelerated the deteriorations of road pavement. A new multi-functional composite pavement system is being developed recently in order to extend service life and upgrade the pavement. A variety of tests were conducted before and after hardening of the concrete.
RESULTS: From the test results, it was found that the use of different types of fibers did not affect the compressive strength development.
This might be due to the inherent property of the lean concrete. When steel fibers were used relatively greater flexural strength and flexural fracture toughness were developed. Also addition of fly ash by replacing a part of Portland cement the fracture toughness was slightly increased.
CONCLUSIONS : It has been known that the addition of fibers and use of mineral admixture can be positively considered in the development of multi-functional composite pavement system as its required mechanical performance is obtained. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705037 | oai_dc | 혼합교통류 신호교차로에서 자전거교통 좌회전 통행방식 평가연구 | Evaluation of Left-Turn Passages for Bicycle Traffic in Mixed Traffic Stream at Signalized Intersections | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"주신혜(한양대학교); 오철(한양대학교); 이상수(아주대학교)"
] | PURPOSES: This study proposes a novel method based on microscopic simulation models to evaluate bicycle passing ways in mixed traffic flow conditions at signalized intersections.
METHODS : Both operational efficiency and safety are taken into consideration in the evaluation. A widely used performance measure,delay, is used for evaluating the operational efficiency. Regarding the safety evaluation, surrogate safety measures (SSM) to represent traffic conflicts and the level of crash severity, DeltaS and Max.DeltaV, are applied in the proposed method.
RESULTS : Extensive simulations and statistical tests show that an integrated bike-box way is identified as the best in terms of operational efficiency and safety.
CONCLUSIONS: The proposed method and outcomes of this study will be valuable for bicycle traffic operations and facility design. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705040 | oai_dc | 고속축중기를 활용한 과적단속시스템의 과적 억제효과 분석 | Overloading Control Effectiveness of Overweight Enforcement System using High-Speed Weigh-In-Motion | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"권순민(한국도로공사 도로교통기술원); 정영윤(한국도로공사 교통처 교통안전팀); 이경배(한국도로공사)"
] | PURPOSES : The aim of this study is to analyze overloading control effectiveness of enforcing overweighted vehicles using HS-WIM (High-Speed Weigh-in-Motion) at main lane of expressway.
METHODS : To analyze the weight distribution statistically, HS-WIM system should has an appropriate weighing accuracy. Thus, the weighing accuracy of the two HS-WIM systems was estimated by applying European specifications and ASTM (American Standards for Testing and Materials) for WIM in this study. Based on the results of accuracy test, overweight enforcement system has been operated at main lanes of two expressway routes in order to provide weight informations of overweighted vehicle in real time for enforcement squad. To evaluate the overloading control effectiveness with enforcement, traffic volume and axle loads of trucks for two months at the right after beginning of the enforcement were compared with data set for same periods before the enforcement.
RESULTS : As the results of weighing accuracy test, both WIM systems were accepted to the most precise type that can be useful to applicate not only statistical purpose but enforcing on overweight vehicles directly. After the enforcement, the rate of overweighted trucks that weighed over enforcement limits had been decreased by 27% compared with the rate before the enforcement. Especially, the rate of overweighted trucks that weighed over 48 tons had been decreased by 91%. On the other hand, in counterpoint to decrease of the overweighted vehicle, the rate of trucks that weighed under enforcement limits had been increased by 7%.
CONCLUSIONS: From the results, it is quite clear that overloading has been controlled since the beginning of the enforcement. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705041 | oai_dc | 교통사고모형 개발에서의 함수식 도출 방법론에 관한 연구 | Methodology for Determining Functional Forms in Developing Statistical Collision Models | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"백종대(한국건설기술연구원); 험머 조셉(Wayne State Univ)"
] | PURPOSES : The purpose of this study is to propose a new methodology for developing statistical collision models and to show the validation results of the methodology.
METHODS: A new modeling method of introducing variables into the model one by one in a multiplicative form is suggested. A method for choosing explanatory variables to be introduced into the model is explained. A method for determining functional forms for each explanatory variable is introduced as well as a parameter estimating procedure. A model selection method is also dealt with. Finally, the validation results is provided to demonstrate the efficacy of the final models developed using the method suggested in this study.
RESULTS: According to the results of the validation for the total and injury collisions, the predictive powers of the models developed using the method suggested in this study were better than those of generalized linear models for the same data.
CONCLUSIONS : Using the methodology suggested in this study, we could develop better statistical collision models having better predictive powers. This was because the methodology enabled us to find the relationships between dependant variable and each explanatory variable individually and to find the functional forms for the relationships which can be more likely non-linear. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705035 | oai_dc | 친환경 도로노선의 재해위험도 평가시스템 개발 | Development of Disaster Risk Analysis System for Environment Friendly Road | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"송민태(평화엔지니어링); 강호근(평화엔지니어링); 깅흥래(평화엔지니어링); 이태옥(평화엔지니어링); 이한주(단국대학교)"
] | PURPOSES : This study is to investigate the consideration which relates with a disaster from route alignment process and proposed the method it will be able to evaluate a disaster danger fixed quantity.
METHODS: Use the landslide disaster probabilistic map of GIS based and in about landslide occurrence of the route alignment at the time of neighboring area after evaluating a risk fixed quantity, it compared LCC expense in about each alternative route. It developed the system it will be able to analyze a LCC and a disaster risk in about the alternative route. In order to verify a risk analytical algorithm and the system which are developed it selected national road 59 lines on the demonstrative route and it analyzed a disaster risk.
RESULTS: Demonstrative route not only the disaster risk to be it will be able to compare a disaster risk fixed quantity like the economical efficiency degree in compliance with LCC expense productions it compared and there being the designer will be able to decide the alternative route, it confirmed.
CONCLUSIONS: Roads can be designed by considering occurs repeatedly landslides and debris flow caused by disasters in advance and expect to be able to effect that can reduce the overall cost to recover losses caused by the disaster, and temporally loss is expected. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705031 | oai_dc | 폐비닐을 함유한 아스팔트 바인더 물성의 실내 시험 | Laboratory Testing of Material Properties of Asphalt Binder Containing Wasted Vinyl | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이강훈(인하대학교); 김영진(한국건술기술연구원); 정진훈(인하대학교); 김병준(인하대학교); 임진선(인하대학교)"
] | PURPOSES : In this study, various laboratory tests were performed to investigate the suitability of wasted vinyl as a modifier of asphalt binder.
METHODS: Based on the ASTM specification, variations in material properties of asphalt binder such as penetration, flash point, softening point, ductility, penetration index (PI), and performance grade (PG) with vinyl content were tested and analyzed.
RESULTS : Lavoratory tests revealed that penetration and ductility of the asphalt binder increased with the vinyl content. The flash point,softening point, and PI decreased, and PG changed from 64-22 to 70-22 with increase of the vinyl content.
CONCLUSIONS: Wasted vinyl modified the material properties of the asphalt binder. However, the asphalt binder with vinyl content over 6.0% was unsuitable as a pavement material. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705034 | oai_dc | 도로에서 차량당 CO2 발생의 민감도 | Analysis of CO2 Emission Sensitivity in Roadways | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이윤석(경기대학교); 오흥운(경기대학교)"
] | PURPOSES: The sensitivity of CO2 emissions per vehicle by a various speeds is compared according to the type of roads.
METHODS: The methodology of the study are as follows: First, the sensitivity of CO2 emissions per vehicle are analyzed by averaged daily travel speeds. Second, the sensitivity of CO2 emissions per vehicle are analyzed by averaged hourly travel speed. Third, the sensitivity of CO2emissions per vehicle are analyzed by sectional travel speeds.
RESULTS : The sensitivity that on Saturday in a week, at peak times in a day and in close location from Seoul was higher than in other situations.
CONCLUSIONS: From this study, we may conclude that CO2 emissions per vehicle at low speeds are generally more sensitive. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705024 | oai_dc | NHPCI 지표를 활용한 공용성 추정과 수명 산정 | Estimation of Performance and Pavement Life using National Highway Pavement Condition Index | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"도명식(국립한밭대학교); 이용준(충남대학교); 임광수(건설교통부); 권수안(한국건설기술연구원)"
] | PURPOSES: The new methodology is proposed for estimation of long-term performance and pavement life based on the national highway database in Daejeon area. Furthermore, this study tried to verify the applicability of performance estimation using NHPCI (National Highway Pavement Condition Index) on tendency of pavement deterioration as time goes by under Korean road environments.
METHODS: Reliability theories are applied to estimate the mean life and to determine the appropriate distribution using 3 levels of traffic loads (high, medium, low) based on maintenance and rehabilitation history data for 15 years.
RESULTS: As a result, Lognormal distribution is suitable for explanation of pavement lifetime in Daejeon area regardless of traffic loads. In addition, we found that the results of mean life and maintenance timing based on NHPCI for the pavement sections of 3 levels of traffic loads are available.
CONCLUSIONS: Based on this study, it was found that mean life of high, medium and low levels of traffic loads are about 8.1 years, 12.2years and 12.7 years, respectively. Higher level of traffic loads shorten the pavement mean life. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705032 | oai_dc | 국내 쇄석골재를 사용한 모르타르 봉 및 콘크리트 각주 시험편의 알칼리-실리카 반응성 비교 | Comparison of Alkali-Silica Reactivity for Mortar Bar and Concrete Prism Specimens Using Crushed Aggregates in Korea | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김성권(강원대학교); 윤경구(강원대학교); 허인(한국도로공사 기술심사처)"
] | PURPOSES: The purpose of this study is to compare the alkali-silica reactivity for mortar bar and concrete prism specimens using crushed aggregates of 5 types in Korea. And the alkali-silica reactivity for those aggregates are measured by chemical test method.
METHODS: The alkali-silica reactivity for those aggregates was measured by chemical test method of KS F 2545, mortar-bar test of KS F 2546, accelerated mortar-bar test method of ASTM C 1260 and concrete prism test method of ASTM C 1293, relatively.
RESULTS : The alkali-silica reactivity for those aggregates was verified by chemical test of KS F 2546 and accelerated mortar-bar test of ASTM C 1260. However, it was not by mortar-bar test of KS F 2546 and concrete prism test of ASTM C 1293.
CONCLUSIONS: The above results showed that relationship among the four test methods were very low. The results from 3 types of test methods using cement-aggregate combinations appeared to be different. Because the environmental conditions of test methods for measuring the alkali-silica reactivity such as equivalent alkali content(external source), humidity, temperature, and times were different though the aggregates were same. Moreover, alkali-silica reactivity showed the biggest impact when alkalis were supplied form outside and exposed to environmental conditions. The accelerated mortar-bar test method seems to be most appropriate test method for concrete structures exposed to alkali environment. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705042 | oai_dc | 고속도로 영업소 광장의 럼블스트립 관련 소음평가 | Noise Evaluation of the Rumble Strips Constructed at Tall Gate of Highway | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이재준(전북대학교); 문성호(서울과학기술대학교); 안덕순(한국건설기술연구원); 권수안(한국건설기술연구원)"
] | PURPOSES : This study evaluated a measuring technique for tire-pavement interaction noise that uses a noble close proximity (NCPX)method as well as for noise level measured inside of a car (e.g., Inside Noise Level) in term of rumble strips constructed at a tall gate.
METHODS: According to the measurements of NCPX and inside noise level (INL), 1/3 octave band frequency analysis and overall noise level calculation were conducted in order to evaluate noise levels of NCPX and INL, depending on types of rumble strips.
RESULTS : The tested sections of general concrete pavement surface and two different types of rumble strips were evaluated, using 1/3octave band frequency analysis and overall noise level. From the analyzed results, it can be concluded that rumble strips generate a relatively huge noise levels when compared to the concrete pavement surface.
CONCLUSIONS: Noting that above 3 dBA different noise levels can let drivers know that they are getting close to toll gate; therefore, they should apply their brakes. Thus, the noise levels of rumble strips are required to be reduced, based on considering the neighbors living near toll gates. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705029 | oai_dc | 블록의 표층재료 특성이 마모저항성에 미치는 영향 분석 | An Analysis on the Effect Factors of the Abrasion Resistance of Interlocking Concrete Block for Roadways | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이민경(한국도로공사 도로교통연구원); 조윤호(중앙대학교); 이재훈(한국도로공사 도로교통기술원); 박준영(한국도로공사 도로교통연구원)"
] | PURPOSES : In this study the influence factors related to abrasion resistance of interlocking concrete block have been evaluated, and comparisons between various domestic and foreign abrasion test methods was also accomplished.
METHODS: The modified rotational cutting method suggested in ASTM C 944 was applied. Surface materials with different types of fine aggregate such as crushed sand, sea sand, and mixture of crushed and sea sand were tested to compare the aggregate effect for abrasion resistance.
RESULTS : The different surface mixtures with various W/C ratios, mortar and fly ash ratios have been investigated for functional and economical considerations.
CONCLUSIONS: This study had obtained reliable results by changing diamond blade of rotating cutter. Therefore, in order to improve the abrasion resistance of interlocking concrete block for road, a new mix design was proposed. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705028 | oai_dc | 급속 동결 융해에 대한 콘크리트의 저항 시험방법(KS F 2456)에 전단파 적용을 위한 실험적 연구 | A Experimental Study on Application of KS F 2456 using Shear Wave | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"안지환(한국건설기술연구원); 전성일(한국건설기술연구원); 권수안(한국건설기술연구원)"
] | PURPOSES : It is important to consider the long-term performance of concrete pavement, because concrete pavement is more exposed to the various environmental conditions than any other concrete structures. One of the several methods to evaluate the long-term performance of concrete during winter is KS F 2456. Relative dynamic modulus of elasticity shows the resistance to freezing and thawing.
METHODS : To measure relative dynamic modulus of elasticity, ultra sonic is generally used. But in this study, to measure the relative dynamic modulus of elasticity, both ultra sonic and shear wave were used and then compared each other.
RESULTS : The results from the measurement by ultrasonic wave and shear wave were divided into three types. Type 1 : Specimens are good and relative dynamic modulus of elasticity did not decrease until 300 cycle. Type 2 : The relative dynamic modulus of elasticity decreased from the late cycle.(about 150 cycle later) Type 3 : The relative dynamic modulus of elasticity consistently decreased from the beginning. As a result of ANOVA, there is no difference according to measuring method, in type 2 and 3. But there is a difference according to measuring method, in type 1's relative dynamic modulus of elasticity.
CONCLUSIONS : It is proved that shear wave can be used to understand the damage tendency of relative freezing and thawing and to measure the relative dynamic modulus of elasticity. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705033 | oai_dc | 유입·유출특성을 고려한 고속도로 연결로의 교통사고 심각도 예측모형 | Prediction Models for the Severity of Traffic Accidents on Expressway On- and Off-Ramps | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"윤일수(아주대학교); 박성호(아주대학교); 윤정은(아주대학교); 최진형(삼성 SDS); 한음(아주대학교)"
] | PURPOSES : Because expressway ramps are very complex segments where diverse roadway design elements dynamically change within relatively short length, drivers on ramps are required to drive their cars carefully for safety. Especially, ramps on expressways are designed to guarantee driving at high speed so that the risk and severity of traffic accidents on expressway ramps may be higher and more deadly than other facilities on expressways. Safe deceleration maneuvers are required on off-ramps, whereas safe acceleration maneuvers are necessary on onramps.
This difference in required maneuvers may contribute to dissimilar patterns and severity of traffic accidents by ramp types. Therefore,this study was aimed at developing prediction models of the severity of traffic accidents on expressway on- and off-ramps separately in order to consider dissimilar patterns and severity of traffic accidents according to types of ramps.
METHODS : Four-year-long traffic accident data between 2007 and 2010 were utilized to distinguish contributing design elements in conjunction with AADT and ramp length. The prediction models were built using the negative binomial regression model consisting of the severity of traffic accident as a dependent variable and contributing design elements as in independent variables.
RESULTS: The developed regression models were evaluated using the traffic accident data of the ramps which was not used in building the models by comparing actual and estimated severity of traffic accidents. Conclusively, the average prediction error rates of on-ramps and offramps were 30.5% and 30.8% respectively.
CONCLUSIONS: The prediction models for the severity of traffic accidents on expressway on- and off-ramps will be useful in enhancing the safety on expressway ramps as well as developing design guidelines for expressway ramps. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705038 | oai_dc | 계층분석법을 이용한 도로관리장비 운영의 효율성 평가 | Evaluation for Operational Efficiency of Road Management Equipment using Analytical Hierarchy Process | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"양충헌(한국건설기술연구원); 김인수(한국건설기술연구원)"
] | PURPOSES: Regional offices of the Ministry of Land, Transport and Maritime Affairs use a computerized system called KAMIS so as to manage road equipment systematically. Road agencies can record number of operating days by equipment, actual working hours, accumulated operating hours (or distance) by equipment, and operating cost. However, KAMIS does not provide critical information, although it is strongly related to efficient road management equipment operation. In other words, road agencies do not know whether they have sufficient equipment to handle their actual work.
METHODS : Therefore, this study suggests a methodology to evaluate for operational efficiency of road management equipment using analytical hierarchy process(AHP). First of all, estimated weights related criteria can be produced by AHP, and then use operational history by pieces of equipment.
RESULTS: Results show that importance of management work can differ from weather conditions through five areas.
CONCLUSIONS: Commonly, this results can imply to help save money for the purchase and maintenance of road management equipment,and they would improve the functional performance of KAMIS. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705039 | oai_dc | VR 시나리오를 이용한 음주운전자 운전 특성의 유의성 및 상관분석에 관한 연구 | A Study on the Significance and Relationship Drunken Drivers Characteristics Using Virtual Reality Scenario | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김명수(한밭대학교); 박상진(한밭대학교)"
] | PURPOSES : The number of traffic accidents in 2010 was 226,978 in Korea, a high percentage of which up to 12.61% was due to drunk driving. As it is expected that the number of traffic accidents will increase because of the drastic increase of the number of vehicle registrations and the prevalent drinking cultures, it is necessary to understand the driving characteristics of drunken drivers to lower the increasing rate.
METHODS: This study, therefore, comparatively analyzes the two groups - one group before drinking and the other after drinking - based on the graph, and implements the correlation in each scenario(1,2,3). scenario 1. appearance of jaywalkers; scenario 2. appearance of an illegal left-turning car; and scenario 3. appearance of a vehicle and a person as obstacles to the driver after an accident.
RESULTS : The comparative analysis of speed shows that the group after drinking was 50km/h faster than the group before drinking in Scenario 1, 20km/h in Scenario 2, and 15km/h in Scenario 3 respectively. In the comparative analysis of acceleration, the average level of the group after drinking was 0.15 higher than that of the group before drinking in Scenario 1, 0.30 in Scenario 2, and 0.15 in Scenario 3. In the comparative analysis of deceleration, the average level of the group after drinking was about 0.4 lower than that of the group before drinking in Scenario 1, 0.35 in Scenario 2, and 0.2 in Scenario 3 respectively. In the comparative analyses, the item of speed, acceleration and deceleration was of significance for each group in Scenarios. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705036 | oai_dc | 고속도로 연결로의 교통사고예측모형 개발 | Traffic Crash Prediction Models for Expressway Ramps | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최윤환(한국도로공사); 오영태(아주대학교); 최기주(아주대학교); 이철기(아주대학교); 윤일수(아주대학교)"
] | PURPOSES: Using the collected data for crash, traffic volume, and design elements on ramps between 2007 and 2009, this research effort was initiated to develop traffic crash prediction models for expressway ramps.
METHODS : Three negative binomial regression models and three zero-inflated negative binomial regression models were developed for individual ramp types, including direct, semi-direct and loop, respectively. For validating the developed models, authors compared the estimated crash frequencies with actual crash frequencies of twelve randomly selected interchanges, the ramps of which have not been used for model developing.
RESULTS: The results show that the negative binomial regression models for direct, semi-direct and loop ramps showed 60.3%, 63.8% and 48.7% error rates on average whereas the zero-inflated negative binomial regression models showed 82.1%, 120.4% and 57.3%, respectively.
CONCLUSIONS : Conclusively, the negative binomial regression models worked better in traffic crash prediction than the zero-inflated negative binomial regression models for estimating the frequency of traffic accidents on expressway ramps. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705023 | oai_dc | 도로포장 구조해석을 위한 점탄성 유한요소 해석코드 개발 | Development of Viscoelastic Finite Element Analysis Code for Pavement Structures | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이창준(경북대학교); 유평준(한국건설기술연구원); 최지영(한국건설기술연구원); 엄병식(한국건설기술연구원)"
] | PURPOSES: A viscoelastic axisymmetric finite element analysis code has been developed for stress analysis of asphalt pavement structures.
METHODS : Generalized Maxwell Model (GMM) and 4-node isoparametric element were employed for finite element formulation. The code was developed using C++ computer program language and named as KICTPAVE. For the verification of the developed code, a structural model of a pavement system was constructed. The structural model was composed of three layers: asphalt layer, crushed stone layer, and soil subgrade. Two types of analysis were considered for the verification: (1)elastic static analysis, (2)viscoelastic time-dependent analysis. For the elastic static analysis, linear elastic material model was assigned to all the layers, and a static load was applied to the structural model. For the viscoelastic time-dependent analysis, GMM and linear elastic material model were assigned to the asphalt layer and all the other layers respectively, and a cyclic loading condition was applied to the structural model.
RESULTS: The stresses and deformations from KICTPAVE were compared with those from ABAQUS. The analysis results obtained from the two codes showed good agreement in time-dependent response of the element under the loading area as well as the surface deformation of asphalt layer, and horizontal and vertical stresses along the axisymmetric axis.
CONCLUSIONS: The validity of KICTPAVE was confirmed by showing the agreement of the analysis results from the two codes. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001705027 | oai_dc | MSCR을 포함한 PG 실험법을 이용한 고분자 개질 바인더의 성능평가 | Performance Evaluation of Polymer Modified Asphalt Binder with PG Testing Protocols | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"윤태영(한국건설기술연구원); 엄병식(한국건설기술연구원); 유평준(한국건설기술연구원)"
] | PURPOSES : SUPERPAVE binder grade tests including Multiple Stress Creep and Recovery(MSCR) test are applied to evaluate rheological properties of four polymer modified binders.
METHODS: To evaluate grade of four modified binders, PG testing protocols, such as DSR, BBR and MSCR are employed.
RESULTS : It is observed that MSCR test shows different performance grades especially on modified binders. Both DMP and EG binder show similar high temperature performance to SBS 5% modified binder.
CONCLUSIONS : Binder Grading system in Korea need to be reviewed to properly reflect the performnace of modified binders. The binders modified with DMP and EG can be possible alternatives SBS 5% modified binder considering its performance and cost. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001705026 | oai_dc | 접착식 콘크리트 덧씌우기 포장의 부착거동 연구 | A Study on the Bond-Behavior of Bonded Concrete Overlays | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김영규(강릉원주대학교); 이승우(강릉원주대학교); 한승환(한국도로공사 도로교통연구원)"
] | PURPOSES : In Korea, rapid maintenance of distressed concrete pavement is required to prevent traffic jam of the highway. Asphalt concrete overlay has been used as a general maintenance method of construction for aged concrete pavement. AC overlay on existing concrete pavements experience various early distresses such as reflection crack, pothole and rutting, due to different physical characteristics between asphalt overlay and existing concrete pavement. Bonded concrete overlay(BCO) is a good alternative since it has advantages that can reduce various distresses during the service life since overlay material has similar properties with existing concrete pavements. Recently, BCO which uses the ultra rapid harding cement has been applied for maintenance of highway. BCO has advantage of structural performance since it does monolithic behave with existing pavement. Therefore, it is important to have a suitable bond strength criteria for securing performance of BCO.
Bond strength criteria should be larger than normal tensile stress and horizontal shear stress occurred by traffic and environmental loading at bond interface. Normal tensile stress and horizontal shear stress need to estimated for the establishment of practical bond strength criteria.
METHODS: This study aimed to estimate the bond stresses at the interface of BCO using the three dimensional finite element analysis.
RESULTS: As a result of this study, major failure mode and maximum bond stress are evaluated through the analysis of normal tensile stress and horizontal shear stress for various traffic and environmental load conditions.
CONCLUSIONS : It was known that normal tensile stresses are dominated by environmental loading, and, horizontal shear stresses are dominated by traffic loading. In addition, bond failure occurred by both of normal tensile stresses and horizontal shear stresses; however,normal tensile stresses are predominated over horizontal shear stresses. | 토목공학 | null | kci_detailed_000166.xml | |||
ART001685956 | oai_dc | 석회석미분말을 함유한 친환경 시멘트콘크리트의 도로포장 적용을 위한 기초 연구 | Fundamental Properties of Limestone Powder Added Cement Environment-friendly Concrete for Concrete Pavement | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최우현(강원대학교); 박철우(강원대학교); 정원경((주)삼우아이엠씨 기술연구소); 김기헌((주)삼우아이엠씨)"
] | PURPOSES: This study is to investigate the fundamental properties of limestone added cement concrete for application of pavement.
METHODS : As the production of Portland cement causes environmental problems, engineers have sought more environment-friendly concrete construction materials. Limestone powder can be used for concrete as a partial replacement of Portland cement. One of the great applications of limestone powder added cement concrete might be a cement concrete pavement since the concrete pavement consumes massive quantity of Portland cement. Experimental variables were different replacement level of limestone powder by 0% to 25% with 5% increment.
Before hardening of fresh concrete, setting time and plastic shrinkage characteristics were investigated in addition to other basic properties.
Properties of hardened concrete included compressive, tensile and flexural strength as well as drying shrinkage.
RESULTS : The addition of limestone powder did not significantly affect the properties of fresh concrete. Strength deceased as the replacement ratio increased and when the replacement ratio was greater than 10% decrease rate increased.
CONCLUSIONS : It was found that the partial replacement of the limestone powder to cement in pavement materials can be positively considered as its mechanical properties show comparable performance to those normal concrete. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685954 | oai_dc | 역학적-경험적 덧씌우기 포장 설계 프로그램 개발 | Development of Mechanistic-Empirical Overlay Pavement Design Program | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"백철민(한국건설기술연구원); 양성린(한국건설기술연구원); 박희문(한국건설기술연구원); 강태욱()"
] | PURPOSES: Recently, the mechanistic-empirical overlay pavement design program that is linked with Korea Pavement Research Program (KPRP) has been developed. This paper focused on establishing the framework and developing the program for the asphalt overlay design over the existing asphalt concrete pavement.
METHODS: The overlay pavement design program developed in this study was investigated to assess the sensitivity to various pavement conditions, such as the damage level and thickness of existing layers. In addition, the actual overlay design on currently performing pavement was carried out as a practical example.
RESULTS: From the sensitivity analysis, it was found that the thickness and damage level of existing asphalt layer mostly affect the overlay design results. In addition, under the same condition, the overlay pavement would better perform in cold region. From the overlay design with the actual condition, it is noted that the overlay thickness varies depending on the given condition.
CONCLUSIONS: Based on various evaluations, it was concluded that the overlay design program developed in this study is a reliable and reasonable tool to be used in the actual pavement design. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685970 | oai_dc | 도로환경특성을 고려한 안전속도 산정에 관한 연구 | Estimation Desirable Safety Speed based on Driving Condition on Rural Highways | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김근혁(서울시립대학교 교통공학과); 임준범(서울시립대학교); 이수범(서울시립대학교); 강동수(도로교통공단); 홍지연(서울시립대학교)"
] | PURPOSES: The causes of traffic accidents can be classified into the factors of highway users, vehicles, and driving environments. Traffic accidents result from the deficiency in single or combination of these three factors. The objective of this study is to define the“ potentially hazardous sections of highway”in terms of traffic safety considering these three factors.
METHODS: The test drivers performed repeated driving on these highway sections. The drivers and passengers recorded the sections on which the driving was uncomfortable, and the speeds on the sections excluding the uncomfortable sections were used for the development of the model.
RESULTS : The model is composed of three sub-models for each of the horizontal curve, tangent, and the section where the curve starts/ends. The safe driving behavior coefficients by the horizontal curvature were derived by comparing the maximum operating speeds at which the vehicle may slide or deviate and the speeds at which the drivers feel comfort. The safety speeds on tangent were derived by the length of tangent section considering the driver’s desired speeds under the traffic condition on which the drivers hardly influenced by the other vehicles. For the sections where the curve starts/ends, the driving behaviors were classified by the distances between the curves, and the safe acceleration/deceleration speeds were derived on which the drivers enter/exit the curve sections safely. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685955 | oai_dc | 교차로 포장 소성변형 저감을 위한 해석적 연구 | An Analytical Study to Reduce Plastic Deformation in Intersection Pavements | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최준성(인덕대학교); 이강훈(인하대학교); 권수안(한국건설기술연구원); 정진훈(인하대학교)"
] | PURPOSES : Plastic deformation is frequently made in intersection asphalt pavement at its early age due to deceleration and stoppage of vehicles. This study has been performed to provide a mechanistic basis for reasonable selection of paving method to minimize the plastic deformation at intersection.
METHODS : Pavement layer, temperature, traffic volume of the intersections managed by the Daejeon Regional Construction and Management Administration were collected to calculate asphalt dynamic modulus with pavement depth by using a prediction equation suggested by the Korean pavement design guide. Performance of ordinary dense-graded asphalt pavement, polymer modified asphalt pavement, and fiber reinforced asphalt pavement was analyzed by finite element method and the results were used in a performance model to predict the plastic deformation.
RESULTS : In aspect of performance, the three paving methods were usable under low traffic while the fiber reinforced asphalt pavement was the most suitable under heavy traffic.
CONCLUSIONS : Reasonable paving method suitable for traffic characteristics in the intersection might be decided by considering economic feasibility. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685960 | oai_dc | 로터리 사고발생 위치별 사고모형 개발 | Developing Accident Models of Rotary by Accident Occurrence Location | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"나희(충북대학교); 박병호(충북대학교)"
] | PURPOSES: This study deals with Rotary by Accident Occurrence Location. The purpose of this study is to develop the accident models of rotary by location.
METHODS: In pursuing the above, this study gives particular attentions to developing the appropriate models using multiple linear, Poisson and negative binomial regression models and statistical analysis tools.
RESULTS: First, four multiple linear regression models which are statistically significant(their values are 0.781, 0.300, 0.784 and 0.644respectively) are developed, and four Poisson regression models which are statistically significant(their values are 0.407, 0.306, 0.378 and 0.366 respectively) are developed. Second, the test results of fitness using RMSE, %RMSE, MPB and MAD show that Poisson regression model in the case of circulatory roadway, pedestrian crossing and others and multiple linear regression model in the case of entry/exit sections are appropriate to the given data. Finally, the common variable that affects to the accident is adopted to be traffic volume.
CONCLUSIONS: 8 models which are all statistically significant are developed, and the common and specific variables that are related to the models are derived. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685953 | oai_dc | 중온아스팔트 혼합물의 현장 적용성 및 실내 공용성 평가 | A Study on Field Application and Laboratory Performance Evaluation of Warm Mix Asphalt | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"양성린(한국건설기술연구원); 백철민(한국건설기술연구원); 정규동(한국건설기술연구원 도로시설연구실); 김영민(한국건설기술연구원); 김용주(한국건설기술연구원); 황성도(한국건설기술연구원)"
] | PURPOSES : This study evaluated the field applicability and laboratory performance of warm-mix asphalt (WMA) as an alternative technology in asphalt pavement.
METHODS: The pilot road using two different types of WMA mixture and one HMA mixture was constructed in Waegwan-Seokjeok road construction site and the mixtures were sampled at the asphalt plant for laboratory testings. The field applicability was assessed in environmental aspects, such as CO2 emission, and in aspects of constructibility using the existing equipment and procedure, i.e., thickness and density measurement. The laboratory testings included the moisture susceptibility test by AASHTO T283, dynamic modulus test, triaxial repeated load permanent deformation test, and the fatigue test.
RESULTS: The temperatures for production and compaction of WMA were 20~30℃ lower than those for HMA and therefore, the noxious gas emission were significantly reduced. The field density of WMA pavements was similar or better than that of HMA pavement. From the laboratory testings, it was found that WMA mixtures exhibit comparable performance to HMA mixture in moisture susceptibility, permanent deformation, and fatigue performance.
CONCLUSIONS: With these results, it would be concluded that WMA could replace the existing HMA technology without any significant issue. To support this conclusion, it is necessary to track the long-term performance of WMA in pilot road. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685967 | oai_dc | 군집분석을 이용한 서울시 행정구역별 교통유형 분류 | Categorization of Traffic Type According to Seoul-City Administrative District Using Cluster Analysis | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"한만섭(경기대학교 공과대학); 오흥운(경기대학교)"
] | PURPOSES: Traffic situation of Seoul City is different each administrative district. because each administrative district population, average travel speed, etc are different. thus, regionally differentiated policy is necessary.
METHODS: In this study, first, it is to implement the cluster analysis using the traffic factor of twenty-five administrative districts in Seoul,categorize it into the cluster and understand the properties. second, related factors of speed were derived. and method to increase the speed was investigated. we choose the eleven traffic factors such as the number of traffic accident cases, total length, speed, the number of cross section,the number of cross section per km, the rate of roads, registered cars, population attending office and school, population density, area.
RESULTS : In the results, first, we could categorize the Seoul-City administrative district into three clusters. in order to find Factors associated with speed a simple regression analysis was performed. and the number of intersections per km is closely related to the speed.
CONCLUSIONS: Through this study, transportation policies reflecting local traffic-related characteristics are required. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685972 | oai_dc | 유고상황 시 MatSIM을 활용한 도시부 도로네트워크 운영 분석 | Application of Multi-Agent Transport Simulation for Urban Road Network Operation in Incident Case | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김주영(서울시립대학교); 유연승(서울시립대학교); 이승재(서울시립대학교); 허혜정(한국건설기술연구원); 성정곤(한국건설기술연구원)"
] | PURPOSES: The purpose of this study is to check the possibilities of traffic pattern analysis using MatSIM for urban road network operation in incident case.
METHODS : One of the stochastic dynamic models is MatSIM. MatSIM is a transportation simulation tool based on stochastic dynamic model and activity based model. It is an open source software developed by IVT, ETH zurich, Switzerland. In MatSIM, various scenario comparison analyses are possible and analyses results are expressed using the visualizer which shows individual vehicle movements and traffic patterns. In this study, trip distribution in 24-hour, traffic volume, and travel speed using MatSIM are similar to those of measured values.
Therefore, results of MatSIM are reasonable comparing with measured values. Traffic patterns are changed according to incident from change of individual behavior.
RESULTS: The simulation results and the actual measured values are similar. The simulation results show reasonable ranges which can be used for traffic pattern analysis.
CONCLUSIONS : The change of traffic pattern including trip distribution, traffic volumes and speeds according to various incident scenarios can be used for traffic control policy decision to provide effective operation of urban road network. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685966 | oai_dc | 도로조명 방식이 운전자 시지각에 미치는 영향 | Effectiveness of Road Lighting on Driver' Vision | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"정준화(한국건설기술연구원); 이석기(한국건설기술연구원); 김원식(벽산엔지니어링(주)); 이미애(I-lignt)"
] | PURPOSES: Road lighting facilities increase the visibility of road at night in order to improve traffic driver safety and comfort. Generally speaking, current pole lighting has a tendency to create problems of glare and flicker. The phenomenon of glare gives discomfort due to increase of scattered light, when high luminance is in driver's field of view. The phenomenon of flicker occurs due to the driver passing through discontinuous pockets of pole lighting areas. These phenomenon increase eye strain and decrease driver safety.
METHODS : Low height line lighting that distributes light lower than driver's eye level has been developed and evaluated to reduce the problems linked to current pole lighting. A test was undertaken with 4 conditions(turn on the general pole lighting, turn off alternate pole lighting, turn on the line lighting and line lighting with 50% dimming). A driver written survey was conducted in order to gain driver feedback.
RESULTS: Pupil size and brow frequency compared with degree in pole lighting are reduced.
CONCLUSIONS : Low height line lighting environment makes drivers more comfortable than pole lighting environment and is positive lighting method in the energy saving and landscape aspect. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685968 | oai_dc | 제설작업과 기상정보의 상관관계를 통한 제설취약성 분석 | Analysis of Snow Removal Vulnerability through Relationship between Snow Removal Works and Weather Forecasts | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"양충헌(한국건설기술연구원); 김인수(한국건설기술연구원); 전우훈(한국건설기술연구원)"
] | PURPOSES : This study demonstrates the need for the collection of road weather information in order to perform efficient snow removal works during the winter season. Snow removal operations are usually dependent upon weather information obtained from the Automatic Weather Station provided by the Korea Meteorological Administration. However, there are some difference between road weather and weather forecasts in their scope. This is because general weather forecasts are focused on macroscopic standpoints rather than microscopic perspectives.
METHODS: In this study, the relationship between snow removal works and historical weather forecasts are properly analyzed to prove the importance of road weather information. We collected both weather data and snow removal works during winter season at "A" regional offices in Gangwon areas.
RESULTS: Results showed that the validation of weather forecasts for snow removal works were depended on the height difference between AWS location and its neighboring roadway.
CONCLUSIONS: Namely, it appears that road weather information should be collected where AWS location and its neighboring roadway have relatively big difference in their heights. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685964 | oai_dc | 소형차 전용도로를 위한 콘크리트 차량방호울타리의 동적성능 평가 | Dynamic Performance Evaluation of Concrete Barrier Systems for Small Vehicle Roadway | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"황인태(벽산엔지니어링㈜); 이동우(영남대학교); 최현호(한국도로공사); 우광성(영남대학교)"
] | PURPOSES: In This study two different concrete barrier systems have been proposed to be established at the small vehicle driveway. One is for median barrier, and the other is for roadside barrier.
METHODS : In order to determine the suitable shape of barrier, the impact parameters including vehicle weight, impact angle, impact velocity and impact level have been analyzed. The real crash test has been carried out with 0.9 ton and 2.5 ton vehicles, respectively by using the 2m segment type concrete barriers connected by steel plates that are totally 40m barrier systems.
RESULTS : The numerical results obtained by LS/DYNA-3D software are compared with real crash tests from the viewpoints of vehicle stability, vehicle trajectory, occupant risk, etc.
CONCLUSIONS: From the above results, the dynamic performance of proposed barrier systems satisfies the specification of Korean Code for roadside safety structures. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685958 | oai_dc | 저온하에서 시차열 수축에 의한 WMA 콘크리트의 휨강도 변화 | Variation of Flexural Strength of Warm-mix Asphalt Concretes Due to Differential Thermal Contraction at Low Temperatures | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최정순(강원대학교); 김성운(강원대학교); 김광우(강원대학교)"
] | PURPOSES : Hot-mix asphalt(HMA) concretes show a trend of strength increase at low temperature due to binder stiffness increase, but strength decrease below a ceratin low temperature. This is due to the differential thermal contraction(DTC) which is induced by a significant difference in coefficients of thermal contraction between aggregate and asphalt which is coated around the aggregate. This DTC damage is well known to occur in HMA concrete, but is not yet investigated in warm-mix asphalt(WMA) concretes.
METHODS : To evaluate DTC damage on WMA in this study, the flexural strength( ) of WMA concretes, which were produced at 30~40℃ lower temperature, was evaluated in comparison with that of HMA at -5, -15 and -25℃.
RESULTS : Most of WMA and HMA mixtures showed flexural strength increase down to -15℃ and decrease below -15℃. this type of strength reduction below -15℃ can e explained as the effect of differential thermal contraction that is a consequence of the large difference in coefficients of thermal contraction between aggregate and asphalt. the property reduction of WMA is similar the result of previous works dealt with HMA mixtures.
CONCLUSIONS : Even though there is some differences by materials used, the WMA concretes showed a significantly lower DTC damage than HMA concrete at low temperature at =0.05 level. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000166.xml | ||
ART001685963 | oai_dc | 다기준의사결정론을 적용한 자전거 과속방지턱 설계기법 연구 | Methodology for Designing Bicycle Speed Hump Using Multi-critiria Decision Making Process | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"주신혜(한양대학교); 오철(한양대학교); 최희용(한양대학교); 장지용(한양대학교)"
] | PURPOSES: Effective speed management is necessary for preventing traffic crashes on the road. Speed hump is known as an effective tool for managing speed. Unlike existing studies which are mainly focused on humps for vehicles, this study proposed a novel method to determine design parameters for bicycle speed humps based on a multi-criteria decision making process.
METHODS: Three objectives including the effectiveness of speed reduction, bicycle safety, and user’s comfortability were incorporated into the proposed evaluation framework for determining design parameters. A multi-criteria value function was also derived and utilized as a part of the proposed method.
RESULTS: Extensive simulations and statistical tests show that an integrated bike-box way is identified as the best in terms of operational efficiency and safety.
CONCLUSIONS : It is expected that the outcomes of this study can be a valuable precursor for developing design guidelines for bicycle road and facility. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000167.xml | ||
ART001685918 | oai_dc | 포장노면 미끄럼 저항특성 | Skid Resistance Characteristics of Pavement Surface | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김용석(한국건설기술연구원); 홍재청(한국건설기술연구원); 유형목(한국건설기술연구원)"
] | PURPOSES : Skid resistance on pavements plays an important role in reducing the risk of vehicle skidding on wet surface particularly.
Almost 9.3 percent of traffic accidents were occurred under rainy condition and these are over-represented in terms of the severity of the crashes. Recently, unusual weather conditions referred widely as the intensified rainfalls justify the need of a systematic management of skid resistance. In this context, the study carried out the observational study on the skid resistance characteristics of different types of pavement with the time passage.
METHODS : This study measured the skid resistance with Pavement Friction Tester at three times within five years. The skid resistance measurement has followed the method suggested by ASTM.
RESULTS : As the main results under the scope of this study, skid resistance of asphalt concrete has not nearly reduced with time. On the contrary, skid resistance of cement concrete has been rapidly reduced with time though the highest resistance was gained at the early observation. Porous asphalt concrete shows a steady decrease of skid resistance with time, anyway, the reduction rate according to the increase of measurement speeds is relatively lower than the others.
CONCLUSIONS: Based on our study, skid resistance of the pavement should be regarded as one of the pavement management system, so periodic measurement should be made to assure road safety as a whole. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000167.xml | ||
ART001685959 | oai_dc | 반사균열 저감을 위한 Saw and Seal 공법의 줄눈재 평가 및 효과에 관한 연구 | A Study on Sealant Evaluation and Effectiveness of Saw and Seal Method for Reducing Reflection Cracking | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"서용환(한국석유공업); 서영찬(한양대학교); 배종오((주)삼우아이엠씨); 전범준(㈜ 삼우아이엠씨 기술연구소)"
] | PURPOSES : The purpose of this study is to select the proper sealing method and to see the performance of the saw and seal method for concrete rehabilitation based on accelerated pavement testings and lab tests.
METHODS: Two accelerated pavement testings were conducted. One is to select proper sealing method of the asphalt joints and the other is to see the performance of the saw and seal method. Lab tests were conducted to select proper sealing method and a test section was constructed to see the field performance.
RESULTS : The result of the first accelerated pavement testing indicated that the adhesive preformed sealants showed good performance when asphalt layer was rutted and in terms preventing from water infiltration. The second acceleration test indicated that the saw and seal method using the adhesive preformed sealant showed much better performance than the control. In the lab test bitumen, rubber and epoxy showed good performance as the adhesive.
CONCLUSIONS : Saw and Seal method using the adhesive preformed sealant would markedly reduce the joint damage on the asphalt overlay. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000167.xml | ||
ART001685957 | oai_dc | 굳지 않은 MMA개질 UP 폴리머 콘크리트의 사용가능시간에 미치는 온도와 결합재의 영향 | Effects of Temperature and Binder Components on Working Life of Fresh MMA Modified UP Polymer Concrete | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"연정흠(University of Texas at Austin); 현상훈((주) 아이콘텍 이앤씨)"
] | PURPOSES: This study deals with the working life of polymer concrete, which is typically used as a repair or overlay material for portland cement concrete pavements.
METHODS : In the scope of this study, laboratory testing was conducted on fresh MMA modified UP polymer concrete, which uses an MMA monomer for viscosity adjustment and strength improvement of UP resin. The experimental variables were temperature (-20 to +20℃)and binder components (MMA, MEKPO, and DMA).
RESULTS : The result showed that the optimum binder ratios for polymer concrete production were 12, 11, and 10 wt.% when the MMA contents were 20, 30, and 40 wt.%, respectively. The working life of polymer concrete depending on temperature and binder components could be expressed by a logarithmic functional formula. The coefficient of variation for each binder component was the highest for DMA content while the lowest for MEKPO content. Also, the contents of each binder component for ensuring the working life of 60 minutes were proposed.
CONCLUSIONS: Ultimately, the present study derived a linear regression equation estimating 60 minutes working life based on the setting times of each binder component. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000167.xml | ||
ART001685961 | oai_dc | 강설에 따른 고속도로 주행속도 변화연구 - 서해안고속도로를 중심으로 - | Effects of Snowfall Intensity on Freeway Travel Speed (Focused on Seohaean Freeway) | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"홍성민(한양대학교); 오철(한양대학교); 양충헌(한국건설기술연구원); 전우훈(한국건설기술연구원)"
] | PURPOSES : Adverse weather conditions such as heavy rain, heavy snowfall, and thick fog and so on have highly affect on the change in traffic conditions on the road. In particular, heavy snowfall causes capacity reduction as well as crash occurrence. This study investigated the effects of snowfall on speed on a freeway.
METHODS: Vehicle detection systems data were matched with corresponding weather station data by regression analysis.
RESULTS: The results show that the travel speed is reduced by 6.7% under little snowfall and by 12.8% under heavy snowfall. Regarding the speed variation, 8.7% and 114.7% increases are observed under little snowfall and heavy snowfall, respectively. It is also found that 1 cm increase in snowfall leads to 0.4% decrease in travel speed. In addition, the travel speed increases by 0.4% when the temperature increases by 1℃.
CONCLUSIONS: It is expected that the outcome of this study will be useful in establishing more effective strategies for winter operations and road maintenance in practice. | 토목공학 | null | http://dx.doi.org/ | kci_detailed_000167.xml | ||
ART001719146 | oai_dc | C-G Method를 이용한 지그재그 노면표시의 교통사고 감소 효과 분석 | Estimation of Traffic Accident Effectiveness of Zig-zag Marking Using a Comparison Group Method | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"권성근(도로교통공단); 이영인(서울대학교); 조성준(서울대학교)"
] | PURPOSES : This research is to evaluate the effects of zig-zag marking.
METHODS : Based on the literature review, This research adopt Comparison Group method which was developed by Hauer.
RESULTS : The findings are as follows. Effectiveness of treatment at all site 1.06, intersection 0.92, median bus lane 1.93, school zone 0.50, below 6-lane 0.48, above 6-lane 1.19, cat vs person 0.57, car vs car 1.36, car only 1.29.
CONCLUSIONS : Though the analysis, it was founded that zig-zag marking on the small scale road(below 6-lane) and school zone contribute to reduce traffic accidents(effectiveness of the treatment : 0.50, 0.48). But the accidents at large scale road and median bus lane where installed zig-zag marking demonstrated negative result.(effectiveness of the treatment indicates exceed 1.0). | 토목공학 | null | kci_detailed_000167.xml | |||
ART001718968 | oai_dc | 지속가능성을 고려한 도시부 도로의 서비스수준 통합 평가 연구 | Integrated Evaluation of Level of Service for Urban Streets Considering Sustainability | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"최용석(인천광역시청); 김응철(인천대학교)"
] | PURPOSES : This paper aims to improve the evaluation method of the Level of Service(LOS) for urban streets presented by the current Korean Highway Capacity Manual(KHCM) and suggest its utilization plan as a part of the methods to evaluate the sustainability of a transportation policy.
METHODS : This paper carried out a research in 3 steps to develop a new evaluation method. First of all, this paper reviewed the previous stu야es related to the LOS of urban streets and the socially requested items for a sustainable transportation system. Then this paper derived an index and weight through expert questions to select an evaluation index. Lastly, this paper compared the results according to the existing evaluation methods with the new evaluation methods through case studies. This paper used an Analytic Hierarchy Process(AHP) for importance analysis and weight selection between new evaluation items and indices, and applied a Grey System Theory(GST) for a synthetic and integrated evaluation between the selected evaluation indices.
RESULTS : As a result of evaluating the LOS according to the existing evaluation methods and the integrated evaluation methods using a GST through case studies, it was analyzed that new methods' results are less than or equal to the existing evaluation methods; and as a result of applying a weight between evaluation indices according to AHP, it was noticed that the total score seems to rise more when the LOS in the existing evaluation is calculated lower. It was analyzed that the LOS calculated by reflecting the newly established evaluation items and the importance between indices in this study has difference from the LOS of the existing urban streets.
CONCLUSIONS : It is expected that this evaluation method can diagnose the current conditions when establishing a future sustainable traffic system and can be used for the measurement of the sustainability effects of the improvement plans and so on. | 토목공학 | null | kci_detailed_000167.xml | |||
ART001718963 | oai_dc | 공공 도로건설사업에서의 원격 현장모니터링 체계 구축에 관한 연구 | A Study on Development of Remote Site Monitoring System in Public Road Construction Projects | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"옥현(한국건설기술연구원)"
] | PURPOSES : Efficiency Improvement of a public road construction project management work using the development of a real-time remote site monitoring system METHODS : In this study, we developed the remote site monitoring system using a web camera for road construction projects in the RCMA(Regional Construction Management Administration). we can be monitored a construction progress and a weak point of the situation in real time using this. To achieve this, we tested about 10 road construction projects ordered by RCMA. Then, we verified a applicability for the site monitoring system in future.
RESULTS : Take advantage of the remote site monitoring system consists of the construction CALS system, one of the business systems used in the part of the MLTM(Ministry of Land, Transport and Maritime Affairs) institution․agencies. Was configured to be served through the “Construction CALS System” of “Construction Management System(Contractors)” and the “Construction CALS Portal System”. Through this, Benefit analysis through a pilot application of the 10 road construction sites and developing considerations and “Guide for visual information processing equipment installation·operating in construction sites” are presented.
CONCLUSIONS : Through the establishment of remote site monitoring system can improve the efficiency of construction management services. In addition, Various disasters and calamities, accidents and illegal construction will be prevented in advance is expected. This is expected to further improve the quality of the facilities. | 토목공학 | null | kci_detailed_000167.xml | |||
ART001719160 | oai_dc | 교통기본도와 운전자 행태에 대한 미시적 분석 | A Microscopic Analysis on the Fundamental Diagram and Driver Behavior | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김태완(중앙대학교)"
] | PURPOSES : The fundamental diagram provides basic information necessary in the analysis of traffic flow and highway operation. When traffic flow is congested, the density-flow points in the fundamental diagram are widely scattered and move in a stochastic manner. This paper investigates the pattern of density-flow point transitions and identifies car-following behaviors underlying the density-flow transitions.
METHODS : From a microscopic analysis of 722 fundamental diagrams of NGSIM data, a total of 20 transition patterns of fundamental diagrams are identified. Prominent features of the transition patterns are explained by the behavior of the leader and follower.
RESULTS : It is found out that the average speed and the speed difference between the leader and the follower critically determine the density-flow transition pattern. The density-flow path is very sensitive to the values of vehicle speed and spacing especially at low speed and high density such that most of the fluctuations in the fundamental diagram in the congested regime is due to the noise of speed and spacing variations.
CONCLUSIONS : The result of this study suggests that the average speed, the speed difference between the leader and the follower, and the random variations of speed and spacing are dominant factors that explain the transition patterns of a fundamental diagram. | 토목공학 | null | kci_detailed_000167.xml | |||
ART001718966 | oai_dc | 무인신호위반단속장비 설치에 따른 사고감소효과 예측 | Prediction on the Accident Reduction Effects of the Red Light Cameras Installation | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김태영(포항공과대학교); 백태현(충북대학교); 박병호(충북대학교)"
] | PURPOSES : This study deals with the effects on the installation of RLC(red light camera). The objective is to analyze the effects of accident reduction after the installation of RLC.
METHODS : In pursuing the above, the study uses the 703 accident data occurred at the 64 intersections which RLC are installed or not installed.
RESULTS : The main results are as follows. First, Poisson RLC accident model developed in this study is analyzed to be statistically significant. Second, using the above developed model, 33 intersections among 40 intersections are predicted to have the decreasing effects of accidents after the installation of RLC. Finally, the reduction effects are analyzed to be affected by ADT and the number of left-turn lane. | 토목공학 | null | kci_detailed_000167.xml | |||
ART001719143 | oai_dc | 2차로도로 평균 통행속도-총지체율-교통량 관계 곡선 재정립 | Relationships Between Average Travel Speed, Time-Delayed Rate, and Volume on Two-lane Highways with Simulation Data | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"문재필(한국건설기술연구원); 김용석(한국건설기술연구원)"
] | PURPOSES : Two-lane highways have one lane in each direction, and lane changing and passing maneuvers take place in the opposing lane depending on the availability of passing sight distance. 2001 Korea Highway Capacity Manual (KHCM) is classified into two classes of two-lane highways (Type I, II), and average travel speed and time-delayed rate are used as measures of effectiveness (MOEs). However, since existing two-lane highways have both uninterrupted and interrupted traffic flow-system elements, a variety of free-flow speeds exhibits in two-lane highways. In addition, it is necessary to check if the linear-relationship between volumes and time-delayed rate is appropriate. Then, this study is to reestablish the relationship between average travel speed, time-delayed rate, and flow.
METHODS : TWOPAS model was selected to conduct this study, and the free-flow speeds of passenger cars and the percentage of following vehicles observed in two-lane highways were applied to the model as the input. The revised relationships were developed from the computer simulation.
RESULTS : In the revised average travel speed vs. flow relationship, the free-flow speed of 90km/h and 70km/h were added. It shows that the relationship between time delayed-rate and flow appeared to be appropriate with the log-function form and that there was no difference in time-delayed rate between the free flow speeds. In addition to revise the relationships, the speed prediction model and the time-delayed rate prediction model were also developed.
CONCLUSIONS : The revised relationships between average travel speed, time-delayed rate, and flow would be useful in estimating the Level of Service(LOS) of a two-lane highway. | 토목공학 | null | kci_detailed_000167.xml | |||
ART001719148 | oai_dc | 자동차 이동 궤적을 고려한 시케인 설계 | Design of Chicane Based on Vehicle Movement Trajectory | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"김용석(한국건설기술연구원); 이석기(한국건설기술연구원)"
] | PURPOSES : The lack of details of guidelines on how to install the Chicane for traffic calming leads the practical difference across the calming areas, so the benefits expected from these facilities are not hardly observed. In this context, this study analysed the relationship between the geometric design alternatives of Chicane with the dynamic behaviour of vehicles in terms of speed and trajectory.
METHODS: The study analysed vehicle dynamic behaviour using dynamic analysis program Auto-Turn under various geometric conditions of Chicane.
RESULTS : This study suggested the design alternatives of Chicane using terms such as “longitudinal displacement value”, “lateral displacement value”, etc. which are defined in the study. The suggested combination set is fulfilling the desired or target speed of vehicles and clearance between vehicle and roadside at the same time.
CONCLUSIONS: The results from this study can be applied to install Chicane corresponding to the local condition where target speed is 30km/h. The study showed the design alternatives of chicane corresponding to the given road cross-sectional design and clearance to roadside for passenger cars and light truck respectively. | 토목공학 | null | kci_detailed_000167.xml | |||
ART001718971 | oai_dc | 고속도로 노면표시 감속유도시설 효과평가 | Effectiveness of the Peripheral Transverse Line as Speed-Reduction Treatment on Korean Expressway Ramps | {
"journal_name": "한국도로학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
} | [
"이성관(미주개발은행); 이기영(한국도로공사); 김석출(한국도로공사)"
] | Since expressways in South Korea are toll roads, many trumpet type interchanges exist, resulting in the installation of loop ramps very frequently. While the travel speed of the main lane is designed to be 100-110 km/h, the structure of a loop ramp is different and is designed for a minimum speed of 40 km/h. In fact, most of the actual travel speeds measured on the ramp exceed the designated speed, which has been a major problem in traffic safety.
In this research, a type of pavement marking speed-reduction treatment called the “Peripheral Transverse Line” is installed on expressway loop ramps in order to study the change of driving speeds after the installation. To verify statistically the change, this speed-reduction treatment has been installed on the Chungju interchange and the Yeoju junction. The driving speeds before the installation were compared with driving speeds both one month and five monthsafter the installation. As a result, the reductions of the average driving speeds after the treatment were statistically significant. More specifically, the average driving speeds of the Chungju interchange were reduced by 7.1-7.7 % for its tangent road section, and the speeds decreased by 8.5-9.5 % for its curve section. Similarly, in the Yeoju junction, an average speed reduction of 2.9-4.8 % for its tangent section was measured, along with 3.9% long-term speed reduction for its curve section.
Since the pavement marking speed-reduction treatment has been partially proven to be effective from this research, we expect to expand this treatment and re-confirm the effect from a long-term perspective in the future. | 토목공학 | null | kci_detailed_000167.xml |
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