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ART001416020
|
oai_dc
|
The dynamic relaxation method using new formulation for fictitious mass and damping
|
The dynamic relaxation method using new formulation for fictitious mass and damping
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M. Rezaiee-pajand(Ferdowsi University of Mashhad); J. Alamatian(Ferdowsi University of Mashhad)"
] |
This paper addresses the modified Dynamic Relaxation algorithm, called mdDR by minimizing displacement error between two successive iterations. In the mdDR method, new relationships for fictitious mass and damping are presented. The results obtained from linear and nonlinear structural analysis, either by finite element or finite difference techniques; demonstrate the potential ability of the proposed scheme compared to the conventional DR algorithm. It is shown that the mdDR improves the convergence rate of Dynamic Relaxation method without any additional calculations, so that, the cost and computational time are decreased. Simplicity, high efficiency and automatic operations are the main merits of the proposed technique.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001416018
|
oai_dc
|
Numerical solution of singular integral equation for multiple curved branch-cracks
|
Numerical solution of singular integral equation for multiple curved branch-cracks
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y.Z. Chen(Jiangsu University); X.Y. Lin(Jiangsu University)"
] |
In this paper, numerical solution of the singular integral equation for the multiple curved branch-cracks is investigated. If some quadrature rule is used, one difficult point in the problem is to balance the number of unknowns and equations in the solution. This difficult point was overcome by taking the following steps: (a) to place a point dislocation at the intersecting point of branches, (b) to use the curve length method to covert the integral on the curve to an integral on the real axis, (c) to use the semi-open quadrature rule in the integration. After taking these steps, the number of the unknowns is equal to the number of the resulting algebraic equations. This is a particular advantage of the suggested method. In addition, accurate results for the stress intensity factors (SIFs) at crack tips have been found in a numerical example. Finally, several numerical examples are given to illustrate the efficiency of the method presented.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001416019
|
oai_dc
|
Nonlinear thermoelastic response of laminated composite conical panels
|
Nonlinear thermoelastic response of laminated composite conical panels
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"B.P. Patel(Indian Institute of Technology Delhi); R.M. Joshi(D. D. University)"
] |
Nonlinear thermoelastic static response characteristics of laminated composite conical panels are studied employing finite element approach based on first-order shear deformation theory and field consistency principle. The nonlinear governing equations, considering moderately large deformation, are solved using Newton-Raphson iterative technique coupled with the adaptive displacement control method to efficiently trace the equilibrium path. The validation of the formulation for mechanical and thermal loading cases is carried out. The present results are found to be in good agreement with those available in the literature. The adaptive displacement control method is found to be capable of handling problems with multiple snapping responses. Detailed parametric study is carried out to highlight the influence of semicone angle, boundary conditions, radius-to-thickness ratio and lamination scheme on the nonlinear thremoelastic response of laminated cylindrical and conical panels.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001416015
|
oai_dc
|
Fragility based damage assesment in existing precast industrial buildings: A case study for Turkey
|
Fragility based damage assesment in existing precast industrial buildings: A case study for Turkey
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Sevket Murat Senel(Pamukkale University); Ali Haydar Kayhan(Pamukkale University)"
] |
In Turkey, majority of industrial facilities are composed of precast buildings. However, precast buildings have suffered extensive damage during Kocaeli and Duzce (1999) and Adana-Ceyhan (1998) earthquakes. Therefore, in this study, fragilities of existing building stock and damage probabilities of precast buildings were studied. For this purpose, building inventories were prepared and variation of structural parameters was determined by investigating the design project of 65 precast buildings constructed in Denizli, Turkey. Twelve analysis models which reflect the stiffness, strength and ductility properties of building inventory were constructed. After the definition of strain based displacement limits and corresponding damage states for buildings, displacement demands were calculated by using non linear time history analysis. During the analyses 360 strong ground motion records were used. Exceedence ratios of concerned damage limits was calculated by checking the displacement demands and then PGV based fragility curves were constructed. Efficiency of strength, stiffness and ductility properties of existing precast buildings were investigated by comparing the fragility curves. The results have shown that the most effective parameters that govern the damage probabilities of precast buildings are stiffness and ductility. It was also stated that the results of fragility analysis and damage and failure observations performed after Kocaeli and Duzce Earthquakes are compatible.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001416017
|
oai_dc
|
Behaviour of asymmetric building with double variable frequency pendulum isolator
|
Behaviour of asymmetric building with double variable frequency pendulum isolator
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"V.R. Panchal(Sardar Vallabhbhai Patel Institute of Technology); D.P. Soni(Sardar Vallabhbhai Patel Institute of Technology); B.B. Mistry(Engineering College)"
] |
Presented in this paper is the behaviour of asymmetric building isolated by the double variable frequency pendulum isolator (DVFPI). The DVFPI is an adoption of single variable frequency pendulum isolator (VFPI). The geometry and coefficient of friction of top and bottom sliding surfaces can be unequal. The governing equations of motion of the building-isolation system are derived and solved in incremental form. The analysis duly considers the interaction of frictional forces in the two principal directions developed at each sliding surface of the DVFPI. In order to investigate the behaviour of the base isolation using the DVFPI, the coupled lateral-torsional response is obtained under different parametric variations for a set of six far-fault earthquake ground motions and criterion to optimize its performance is proposed. Further, influences of the initial time period, coefficient of friction and frequency variation factors at the two sliding surfaces are investigated. The numerical results of the extensive parametric study help in understanding the torsional behaviour of the structure isolated with the double sliding surfaces as in the DVFPI. It is found that the performance of the DVFPI can be optimized by designing the top sliding surface initially softer and smoother relative to the bottom one.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001416013
|
oai_dc
|
Probabilistic shear strength models for reinforced concrete beams without shear reinforcement
|
Probabilistic shear strength models for reinforced concrete beams without shear reinforcement
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"송준호(University of Illinois); 김강수(서울시립대학교); Won-Hee Kang(University of Illinois); Sungmoon Jung(FAMU-FSU College of Engineering)"
] |
In order to predict the shear strengths of reinforced concrete beams, many deterministic models have been developed based on rules of mechanics and on experimental test results. While the constant and variable angle truss models are known to provide reliable bases and to give reasonable predictions for the shear strengths of members with shear reinforcement, in the case of members without shear reinforcement, even advanced models with complicated procedures may show lack of accuracy or lead to fairly different predictions from other similar models. For this reason, many research efforts have been made for more accurate predictions, which resulted in important recent publications. This paper develops probabilistic shear strength models for reinforced concrete beams without shear reinforcement based on deterministic shear strength models, understanding of shear transfer mechanisms and influential parameters, and experimental test results reported in the literature. Using a Bayesian parameter estimation method, the biases of base deterministic models are identified as algebraic functions of input parameters and the errors of the developed models remaining after the bias-correction are quantified in a stochastic manner. The proposed probabilistic models predict the shear strengths with improved accuracy and help incorporate the model uncertainties into vulnerability estimations and risk-quantified designs.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001377776
|
oai_dc
|
Shear locking-free earthquake analysis of thick and thin plates using Mindlin’s theory
|
Shear locking-free earthquake analysis of thick and thin plates using Mindlin’s theory
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. I. Özdemir(Karadeniz Technical University); Y. Ayvaz(Karadeniz Technical University)"
] |
The purpose of this paper is to study shear locking-free parametric earthquake analysis of thick and thin plates using Mindlin’s theory, to determine the effects of the thickness/span ratio, the aspect ratio and the boundary conditions on the linear responses of thick and thin plates subjected to earthquake excitations. In the analysis, finite element method is used for spatial integration and the Newmark-β method is used for the time integration. Finite element formulation of the equations of the thick plate
theory is derived by using higher order displacement shape functions. A computer program using finite element method is coded in C++ to analyze the plates clamped or simply supported along all four edges. In the analysis, 17-noded finite element is used. Graphs are presented that should help engineers in the design of thick plates subjected to earthquake excitations. It is concluded that 17-noded finite element can be effectively used in the earthquake analysis of thick and thin plates. It is also concluded that, in general, the changes in the thickness/span ratio are more effective on the maximum responses considered in this study than the changes in the aspect ratio.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001377779
|
oai_dc
|
Simplified P-Delta and buckling analysis for inelastic flexibility-based beam-column elements
|
Simplified P-Delta and buckling analysis for inelastic flexibility-based beam-column elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Griengsak Kaewkulchai(UbonRatchathani University); Sdhabhon Bhokha(UbonRatchathani University)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001351967
|
oai_dc
|
A simplified analysis of the behavior of suspension bridges under live load
|
A simplified analysis of the behavior of suspension bridges under live load
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Leonidas T. Stavridis(National Technical University of Athens)"
] |
Having established the initial geometry and cable force of a typical three span suspension bridge under permanent load, the additional maximum response of the cable and the stiffening girder due to live load are determined, by means of an analytic procedure, considering the girder first hinged at its ends and then continuous through the main towers. The problem of interaction between the cable and the stiffening girder is examined taking under due consideration the second order effects, whereby, through the analogy to a fictitious tensioned beam under transverse load, a closed –form solution is achieved by
means of a simple quadratic equation. It is found that the behavior of the whole system is governed by five simple dimensionless parameters which enable a quick determination of all the relevant design magnitudes of the bridge. Moreover, by introducing these parameters, a set of diagrams is presented, which enable the estimation of the influence of the geometric and loading data on the response and permit its immediate evaluation for preliminary design purposes.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351984
|
oai_dc
|
Dynamic analysis of thin-walled open section beam under moving vehicle by transfer matrix method
|
Dynamic analysis of thin-walled open section beam under moving vehicle by transfer matrix method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Tianyu Xiang(Southwest Jiaotong University); Tengfei Xu(Southwest Jiaotong University); Xinpeng Yuan(Southwest Jiaotong University); Renda Zhao(Southwest Jiaotong University); Yuqiang Tong(China Highway Planning and Design Institute)"
] |
Three dimensional coupled bending-torsion dynamic vibrations of thin-walled open section beam subjected to moving vehicle are investigated by transfer matrix method. Through adopting the idea of Newmark-β method, the partial differential equations of structural vibration can be transformed to the
differential equations. Then, those differential equations are solved by transfer matrix method. An iterative scheme is proposed to deal with the coupled bending-torsion terms in the governing vibration equations.
The accuracy of the presented method is verified through two numerical examples. Finally, with different eccentricities of vehicle, the torsional vibration of thin-walled open section beam and vertical and rolling
vibration of truck body are investigated. It can be concluded from the numerical results that the torsional vibration of beam and rolling vibration of vehicle increase with the eccentricity of vehicle. Moreover, it can be observed that the torsional vibration of thin-walled open section beam may have a significant nonlinear influence on vertical vibration of truck body.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351957
|
oai_dc
|
Analysis of local vibrations in the stay cables of an existing cable-stayed bridge under wind gusts
|
Analysis of local vibrations in the stay cables of an existing cable-stayed bridge under wind gusts
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Qingxiong Wu(Fuzhou University); Kazuo Takahashi(Nagasaki University); Baochun Chen(Fuzhou University)"
] |
This paper examines local vibrations in the stay cables of a cable-stayed bridge subjected to wind gusts. The wind loads, including the self-excited load and the buffeting load, are converted into time-domain values using the rational function approximation and the multidimensional autoregressive
process, respectively. The global motion of the girder, which is generated by the wind gusts, is analyzed using the modal analysis method. The local vibration of stay cables is calculated using a model in which an inclined cable is subjected to time-varying displacement at one support under global vibration. This model can consider both forced vibration and parametric vibration. The response characteristics of the local vibrations in the stay cables under wind gusts are described using an existing cable-stayed bridge.
The results of the numerical analysis show a significant difference between the combined parametric and forced vibrations and the forced vibration.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351991
|
oai_dc
|
Elastic analysis for a strip weakened by periodic holes
|
Elastic analysis for a strip weakened by periodic holes
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. Z. Chen(Jiangsu University); X. Y. Lin(Jiangsu University)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001351963
|
oai_dc
|
Seismic performance evaluation of school buildings in Turkey
|
Seismic performance evaluation of school buildings in Turkey
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Mehmet Inel(Pamukkale University); Hayri Baytan Ozmen(Pamukkale University); Huseyin Bilgin(Epoka University)"
] |
This study evaluates seismic performance of the school buildings with the selected template designs in Turkey considering nonlinear behavior of reinforced concrete components. Six school buildings with template designs were selected to represent major percentage of school buildings in medium-size cities located in high seismic region of Turkey. Selection of template designed buildings and material properties were based on field investigation on government owned school buildings in several cities in western part of
Turkey. Capacity curves of investigated buildings were determined by pushover analyses conducted in two principal directions. The inelastic dynamic characteristics were represented by equivalent single-degree-offreedom (SDOF) systems and their seismic displacement demands were calculated under selected ground motions. Seismic performance evaluation was carried out in accordance with recently published Turkish Earthquake Code that has similarities with FEMA-356 guidelines. Reasons of building damages in past earthquakes are examined using the results of performance assessment of investigated buildings. The effects of material quality on seismic performance of school buildings were investigated. The detailed examination of capacity curves and performance evaluation identified deficiencies and possible solutions for template designs.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351972
|
oai_dc
|
Response of temperature dependence of an elastic modulus in microstretch generalized thermoelasticity
|
Response of temperature dependence of an elastic modulus in microstretch generalized thermoelasticity
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Rajneesh Kumar(Kurukshetra University); Rajani Rani Gupta(Kurukshetra University)"
] |
Laplace-Fourier transform techniques are used to investigate the interaction caused by mechanical, thermal and microstress sources in a generalized thermomicrostretch elastic medium with temperature-dependent mechanical properties. The modulus of elasticity is taken as a linear function of
reference temperature. The integral transforms are inverted using a numerical technique to obtain the normal stress, tangential stress, tangential couple stress, microstress and temperature distribution. Effect of temperature dependent modulus of elasticity and thermal relaxation times have been depicted graphically on the resulting quantities. Comparisons are made with the results predicted by the theories of generalized thermoelasticity. Some particular cases are also deduced from the present investigation.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351977
|
oai_dc
|
Periodic solutions of the Duffing equation
|
Periodic solutions of the Duffing equation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jale Tezcan(Southern Illinois University); J. Kent Hsiao(Southern Illinois University)"
] |
This paper presents a new linearization algorithm to find the periodic solutions of the Duffing equation, under harmonic loads. Since the Duffing equation models a single degree of freedom system with a cubic nonlinear term in the restoring force, finding its periodic solutions using classical
harmonic balance (HB) approach requires numerical integration. The algorithm developed in this paper replaces the integrals appearing in the classical HB method with triangular matrices that are evaluated algebraically. The computational cost of using increased number of frequency components in the matrixbased linearization approach is much smaller than its integration-based counterpart. The algorithm is computationally efficient; it only takes a few iterations within the region of convergence. An example comparing the results of the linearization algorithm with the “exact” solutions from a 4th order Runge- Kutta method are presented. The accuracy and speed of the algorithm is compared to the classical HB method, and the limitations of the algorithm are discussed.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001432069
|
oai_dc
|
Experiments on reinforced concrete beam-column joints under cyclic loads and evaluating their response by nonlinear static pushover analysis
|
Experiments on reinforced concrete beam-column joints under cyclic loads and evaluating their response by nonlinear static pushover analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Akanshu Sharma(Bhabha Atomic Research Centre); G.R. Reddy(Bhabha Atomic Research Centre); Rolf Eligehausen(Universität Stuttgart); K.K. Vaze(Bhabha Atomic Research Centre); A.K. Ghosh(Bhabha Atomic Research Centre); H.S. Kushwaha(Bhabha Atomic Research Centre)"
] |
Beam-column joints are the key structural elements, which dictate the behavior of structures subjected to earthquake loading. Though large experimental work has been conducted in the past, still various issues regarding the post-yield behavior, ductility and failure modes of the joints make it a highly important research topic. This paper presents experimental results obtained for eight beam-column joints of different sizes and configuration under cyclic loads along with the analytical evaluation of their response using a simple and effective analytical procedure based on nonlinear static pushover analysis. It is shown that even the simplified analysis can predict, to a good extent, the behavior of the joints by giving the important information on both strength and ductility of the joints and can even be used for prediction of failure modes. The results for four interior and four exterior joints are presented. One confined and one unconfined joint for each configuration were tested and analyzed. The experimental and analytical results are presented in the form of load-deflection. Analytical plots are compared with envelope of experimentally obtained hysteretic loops for the joints. The behavior of various joints under cyclic loads is carefully examined and presented. It is also shown that the procedure described can be effectively utilized to analytically gather the information on behavior of joints.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001432056
|
oai_dc
|
Mass optimization of four bar linkage using genetic algorithms with dual bending and buckling constraints
|
Mass optimization of four bar linkage using genetic algorithms with dual bending and buckling constraints
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.R.A. Hassan(Universiti Teknologi MARA); I.A. Azid(Universiti Sains Malaysia); M. Ramasamy(Universiti Sains Malaysia); J. Kadesan(Universiti Sains Malaysia); K.N. Seetharamu(M.S. Ramaiah School of Advanced Studies); A.S.K. Kwan(Cardiff School of Engineering); P. Arunasalam(State University of New York at Binghamton)"
] |
In this paper, the mass optimization of four bar linkages is carried out using genetic algorithms (GA) with single and dual constraints. The single constraint of bending stress and the dual constraints of bending and buckling stresses are imposed. From the movement response of the bar linkage mechanism, the analysis of the mechanism is developed using the combination of kinematics, kinetics, and finite element analysis (FEA). A penalty-based transformation technique is used to convert the constrained problem into an unconstrained one. Lastly, a detailed comparison on the effect of single constraint and of dual constraints is presented.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001432015
|
oai_dc
|
Experimental and finite element studies of special-shape arch bridge for self-balance
|
Experimental and finite element studies of special-shape arch bridge for self-balance
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Pengzhen Lu(Southwest Jiaotong University); Renda Zhao(Southwest Jiaotong University); Junping Zhang(Guangzhou University)"
] |
Special-shape arch bridge for self-balance (SBSSAB) in Zhongshan City is a kind of new fashioned spatial combined arch bridge composed of inclined steel arch ribs, curved steel box girder and inclined suspenders, and the mechanical behavior of the SBSSAB is particularly complicated. The SBSSAB is aesthetic in appearance, and design of the SBSSAB is artful and particular. In order to roundly investigate the mechanical behavior of the SBSSAB, 3-D finite element models for spatial member and shell were established to analyze the mechanical properties of the SBSSAB using ANSYS. Finite element analyses were conducted under several main loading cases, moreover deformation and strain values for control section of the SBSSAB under several main loading cases were proposed. To ensure the safety and rationality for optimal design of the SBSSAB and also to verify the reliability of its design and calculation theories, the 1/10 scale model tests were carried out. The measured results include the load checking calculation, lane loading and crowd load, and dead load. A good agreement is achieved between the experimental and analytical results. Both experimental and analytical results have shown that the SBSSAB is in the elastic state under the planned test loads, which indicates that the SBSSAB has an adequate load-capacity. The calibrated finite-element model that reflects the as-built conditions can be used as a baseline for health monitoring and future maintenance of the SBSSAB.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001431989
|
oai_dc
|
Experimental investigation on CFRP-to-concrete bonded joints across crack
|
Experimental investigation on CFRP-to-concrete bonded joints across crack
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ozgur Anil(Gazi university); Cagatay M. Belgin(Gazi University); M. Emin Kara(Aksaray University)"
] |
Bonding of carbon fiber reinforced polymer (CFRP) composites has become a popular technique for strengthening concrete structures in recent years. The bond stress between concrete and CFRP is the main factor determining the strength, rigidity, failure mode and behavior of a reinforced concrete member strengthened with CFRP. The accurate evaluation of the strain is required for analytical calculations and design processes. In this study, the strain between concrete and bonded CFRP sheets across the notch is tested. In this paper, indirect axial tension is applied to CFRP bonded test specimen by a four point bending tests. The variables studied in this research are CFRP sheet width, bond length and the concrete compression strength. Furthermore, the effect of a crack- modeled as a notch- on the strain distribution is studied. It is observed that the strain in the CFRP to concrete interface reaches its maximum values near the crack tips. It is also observed that extending the CFRP sheet more than to a certain length does not affect the strength and the strain distribution of the bonding. The stress distribution obtained from experiments are compared to Chen and Teng’s (2001) analytical model.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001431999
|
oai_dc
|
A hybrid simulated annealing and optimality criteria method for optimum design of RC buildings
|
A hybrid simulated annealing and optimality criteria method for optimum design of RC buildings
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Gang Li(Dalian University of Technology); Haiyan Lu(Shenyang University); Xiang Liu(Dalian University of Technology)"
] |
This paper proposes a hybrid heuristic and criteria-based method of optimum design which combines the advantages of both the iterated simulated annealing (SA) algorithm and the rigorously derived optimality criteria (OC) for structural optimum design of reinforced concrete (RC) buildings under multi-load cases based on the current Chinese design codes. The entire optimum design procedure is divided into two parts: strength optimum design and stiffness optimum design. A modified SA with the strategy of adaptive feasible region is proposed to perform the discrete optimization of RC frame structures under the strength constraints. The optimum stiffness design is conducted using OC method with the optimum results of strength optimum design as the lower bounds of member size. The proposed method is integrated into the commercial software packages for building structural design, SATWE, and for finite element analysis, ANSYS, for practical applications. Finally, two practical frame-shear-wall structures (15-story and 30-story) are optimized to illustrate the effectiveness and practicality of the proposed optimum design method.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001432029
|
oai_dc
|
Linear elastic and limit state solutions of beam string structures by the Ritz-method
|
Linear elastic and limit state solutions of beam string structures by the Ritz-method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Weichen Xue(Tongji University); Sheng Liu(Tongji University)"
] |
The beam string structure (BSS) has been widely applied in large span roof structures, while no analytical solutions of BSS were derived for it in the existing literature. In the first part of this paper, calculation formulas of displacement and internal forces were obtained by the Ritz-method for the most commonly used arc-shaped BSS under the vertical uniformly distributed load and the prestressing force. Then, the failure mode of BSS was proposed based on the static equilibrium. On condition the structural stability was reliable, BSS under the uniformly distributed load would fail by tensile strength failure of the string, and the beam remained in the elastic or semi-plastic range. On this basis, the limit load of BSS was given in virtue of the elastic solutions. In order to verify the linear elastic and limit state solutions proposed in this paper, three BSS modal were tested and the corresponding elastoplastic large deformation analysis was performed by the ANSYS program. The proposed failure mode of BSS was proved to be correct, and the analytical results for the linear elastic and limit state were in good agreement with the experimental and FEM results.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001432022
|
oai_dc
|
On the accuracy of estimation of rigid body inertia properties from modal testing results
|
On the accuracy of estimation of rigid body inertia properties from modal testing results
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.R. Ashory(Semnan University); A. Malekjafarian(Semnan University); P. Harandi(Semnan University)"
] |
The rigid body inertia properties of a structure including the mass, the center of gravity location, the mass moments and principal axes of inertia are required for structural dynamic analysis, modeling of mechanical systems, design of mechanisms and optimization. The analytical approaches such as solid or finite element modeling can not be used efficiently for estimating the rigid body inertia properties of complex structures. Several experimental approaches have been developed to determine the rigid body inertia properties of a structure via Frequency Response Functions (FRFs). In the present work two experimental methods are used to estimate the rigid body inertia properties of a frame. The first approach consists of using the amount of mass as input to estimate the other inertia properties of frame. In the second approach, the property of orthogonality of modes is used to derive the inertia properties of a frame. The accuracy of the estimated parameters is evaluated through the comparison of the experimental results with those of the theoretical Solid Work model of frame. Moreover, a thorough discussion about the effect of accuracy of measured FRFs on the estimation of inertia properties is presented.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001432074
|
oai_dc
|
Optimal design of a new seismic passive protection device made in aluminium and steel
|
Optimal design of a new seismic passive protection device made in aluminium and steel
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Dora Foti(Politecnico di Bari); Mariella Diaferio(Politecnico di Bari); Riccardo Nobile(Università del Salento)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001432077
|
oai_dc
|
Shear behavior of exterior reinforced concrete beam-column joints
|
Shear behavior of exterior reinforced concrete beam-column joints
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"F. Alemdar(Paul C. Rizzo Associates, Inc.); H. Sezen(The Ohio State University)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001415076
|
oai_dc
|
System identification of steel framed structures with semi-rigid connections
|
System identification of steel framed structures with semi-rigid connections
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hasan N. Katkhuda(The Hashemite University); Hazim M. Dwairi(The Hashemite University); Nasim Shatarat(The Hashemite University)"
] |
A novel system identification and structural health assessment procedure of steel framed structures with semi-rigid connections is presented in this paper. It is capable of detecting damages at the local element level under normal operating conditions; i.e., serviceability limit state. The procedure is a linear time-domain system identification technique in which the structure responses are required, whereas the dynamic excitation force is not required to identify the structural parameters. The procedure tracks changes in the stiffness properties of all the elements in a structure. It can identify damage-free and damaged structural elements very accurately when excited by different types of dynamic loadings. The method is elaborated with the help of several numerical examples. The results indicate that the proposed algorithm identified the structures correctly and detected the pre-imposed damages in the frames when excited by earthquake, impact, and harmonic loadings. The algorithm can potentially be used for structural health assessment and monitoring of existing structures with minimum disruption of operations. Since the procedure requires only a few time points of response information, it is expected to be economic and efficient.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001415078
|
oai_dc
|
Mechanical behavior and buckling failure of sharp-notched circular tubes under cyclic bending
|
Mechanical behavior and buckling failure of sharp-notched circular tubes under cyclic bending
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kuo-Long Lee(Far East University)"
] |
In this paper, an experimental investigation of the mechanical behavior and buckling failure of sharp-notched circular tubes subjected to cyclic bending is discussed. The unnotched and sharp-notched circular tubes of SUS 304 stainless steel were tested under symmetric curvature-controlled cyclic bending. It was found from moment-curvature curves that the loops show cyclic hardening and gradually steady after a few cycles for all tested tubes. The ovalization-curvature curves show an unsymmetric, ratcheting and increasing manner with the number of cycles. In addition, it was found that six almost parallel lines corresponding to unnotched and five different notch-depth (0.2, 0.4, 0.6, 0.8 and 1.0 mm) tubes were noted from the experimental relationship between the cyclic controlled curvature and the number of cycles necessary to produce buckling on a log-log scale. An empirical formulation was proposed so that it could be used for simulating the aforementioned relationship. By comparing with the experimental finding, the simulation was in good agreement with the experimental data.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001415080
|
oai_dc
|
Constitutive law of grouted concrete block masonry in plain stress state
|
Constitutive law of grouted concrete block masonry in plain stress state
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Liu Lipeng(Harbin Institute of Technology); Wang Zonglin(Harbin Institute of Technology); Zhai Changhai(Harbin Institute of Technology); Zhai Ximei(Harbin Institute of Technology)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001415082
|
oai_dc
|
Curvature effect on guided wave propagation in curved steel plates and hollow steel cylinders
|
Curvature effect on guided wave propagation in curved steel plates and hollow steel cylinders
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"이주원(부경대학교); 나원배(부경대학교); 김정태(부경대학교)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001415070
|
oai_dc
|
Application of fiber element in the assessment of the cyclic loading behavior of RC columns
|
Application of fiber element in the assessment of the cyclic loading behavior of RC columns
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"R. Sadjadi(Ryerson University); M.R. Kianoush(Ryerson University)"
] |
This paper studies the reliability of an analytical tool for predicting the lateral loaddeformation response of RC columns while subjected to lateral cyclic displacements and axial load. The analytical tool in this study is based on a fiber element model implemented into the program DRAIN-2DX (fiber element). The response of RC column under cyclic displacement is defined by the behavior of concrete, and reinforcing steel under general reversed-cyclic loading. A tri-linear stress-strain relationship for the cyclic behavior of steel is proposed and the improvement in the analytical results is studied. This study only considers the behavior of columns with flexural dominant mode of failure. It is concluded that with the implementation of appropriate constitutive material models, the described analytical tools can predict the response of the columns with reasonable accuracy when compared to experimental data.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001415079
|
oai_dc
|
Influence of elastic T-stress on the growth direction of two parallel cracks
|
Influence of elastic T-stress on the growth direction of two parallel cracks
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"X.-F. Li(Central South University); B.-Q. Tang(Changsha University of Science and Technology); X.-L. Peng(Central South University); Y. Huang(Central South University)"
] |
This paper studies fracture initiation direction of two parallel non-coplanar cracks of equal length. Using the dislocation pile-up modelling, singular integral equations for two parallel cracks subjected to mixed-mode loading are derived and the crack-tip field including singular and non-singular terms is obtained. The kinking angle is determined by using the maximum hoop stress criterion, or the σθ -criterion. Results are presented for simple uniaxial tension and biaxial loading. The biaxiality ratio has a noticeable influence on crack growth direction. For the case of biaxial tension, when neglecting the Tstress the crack branching angle is overestimated for small crack inclination angles relative to the largest applied principal stress direction, and underestimated for large crack inclination angles.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001415072
|
oai_dc
|
Out of plane behavior of walls, using rigid block concepts
|
Out of plane behavior of walls, using rigid block concepts
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Mohammadi Gh.M.(International Institute of Earthquake Engineering and Seismology (IIEES)); Yasrebi F.(International Institute of Earthquake Engineering and Seismology (IIEES))"
] |
Out of plane behaviors of walls and infills are investigated in this paper, using rigid block concepts. Walls and infills are sometimes separated from top beams because of in plane movement of the walls and crumbling mortar layers under the top beams. Therefore, sufficient strength should be supplied to hold them against out of plane forces. Such walls are studied here under some real and scaled earthquakes, regarding their out of plane behavior. Influences of some reinforcements, connecting the walls to frames or perpendicular walls, are also studied. It is shown that unreinforced walls of regular sizes (3 m high and 4.5 m long) are normally unstable in the earthquakes. However, performing some reinforced bars that connect them to adjacent elements- frames or perpendicular walls - stabilizes them.
Eventually, it is concluded that supplying 3 reinforced bars at 1/4, 2/4 and 3/4 of the panel’s height stabilizes the walls in the assumed earthquakes. In this regard, for 20 cm and 35 cm thick walls Φ18mm and Φ20mm bars are to be used, respectively. For walls with other configurations, the forces and required areas of the reinforcements can be determined by the developed method of this paper.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001415071
|
oai_dc
|
Dynamic contact response of a finite beam on a tensionless Pasternak foundation under symmetric and asymmetric loading
|
Dynamic contact response of a finite beam on a tensionless Pasternak foundation under symmetric and asymmetric loading
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Irfan Coskun(Yildiz Technical University)"
] |
The dynamic response of a finite Bernoulli-Euler beam resting on a tensionless Pasternak foundation and subjected to a concentrated harmonic load is investigated in this study. This load may be applied at the center of the beam, or it may be offset from the center. Since the elastic foundation is assumed to be tensionless, the beam may lift off the foundation, resulting in contact and non-contact regions in the system. An analytical/numerical solution is obtained from the governing equations of the contact and non-contact regions to determine the coordinates of the lift-off points. Although there is no nonlinear term in the equations, the problem appears to be nonlinear since the contact regions are not known in advance. Due to that nonlinearity, the essentials of the problem (the coordinates of the lift-off points) are calculated numerically using the Newton-Raphson technique. The results, which represent the symmetric and asymmetric responses of the beam, are presented graphically in this work. They illustrate the effects of the forcing frequency and the beam length on the extent of the contact regions and displacements.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001415068
|
oai_dc
|
Thermomechanical deformation in porous generalized thermoelastic body with variable material properties
|
Thermomechanical deformation in porous generalized thermoelastic body with variable material properties
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Rajneesh Kumar(Kurukshetra University); Savita Devi(D.N. College)"
] |
The two-dimensional deformation of a homogeneous, isotropic thermoelastic half-space with voids with variable modulus of elasticity and thermal conductivity subjected to thermomechanical boundary conditions has been investigated. The formulation is applied to the coupled theory(CT) as well as generalized theories: Lord and Shulman theory with one relaxation time(LS), Green and Lindsay theory with two relaxation times(GL) Chandrasekharaiah and Tzou theory with dual phase lag(C-T) of thermoelasticity. The Laplace and Fourier transforms techniques are used to solve the problem. As an application, concentrated/uniformly distributed mechanical or thermal sources have been considered to illustrate the utility of the approach. The integral transforms have been inverted by using a numerical inversion technique to obtain the components of displacement, stress, changes in volume fraction field and temperature distribution in the physical domain. The effect of dependence of modulus of elasticity on the components of stress, changes in volume fraction field and temperature distribution are illustrated graphically for a specific model. Different special cases are also deduced.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001353875
|
oai_dc
|
Modeling cover cracking due to rebar corrosion in RC members
|
Modeling cover cracking due to rebar corrosion in RC members
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Satish B. Allampallewar(Maharashtra Academy of Engineering); A. Srividya(Indian Institute of Technology Bombay)"
] |
Serviceability and durability of the concrete members can be seriously affected by the corrosion of steel rebar. Carbonation front and or chloride ingress can destroy the passive film on rebar and may set the corrosion (oxidation process). Depending on the level of oxidation (expansive corrosion
products/rust) damage to the cover concrete takes place in the form of expansion, cracking and spalling or delamination. This makes the concrete unable to develop forces through bond and also become unprotected against further degradation from corrosion; and thus marks the end of service life for
corrosion-affected structures. This paper presents an analytical model that predicts the weight loss of steel rebar and the corresponding time from onset of corrosion for the known corrosion rate and thus can be used for the determination of time to cover cracking in corrosion affected RC member. This model uses fully the thick-walled cylinder approach. The gradual crack propagation in radial directions (from inside) is considered when the circumferential tensile stresses at the inner surface of intact concrete have reached the tensile strength of concrete. The analysis is done separately with and without considering the stiffness of reinforcing steel and rust combine along with the assumption of zero residual strength of cracked concrete. The model accounts for the time required for corrosion products to fill a porous zone before they start inducing expansive pressure on the concrete surrounding the steel rebar. The capability of the model to produce the experimental trends is demonstrated by comparing the model’s predictions with the results of experimental data published in the literature. The effect of considering the corroded reinforcing steel bar stiffness is demonstrated. A sensitivity analysis has also been carried out to show the influence of the various parameters. It has been found that material properties and their inter-relations significantly influence weight loss of rebar. Time to cover cracking from onset of corrosion for the same weight loss is influenced by corrosion rate and state of oxidation of corrosion product formed. Time to cover cracking
from onset of corrosion is useful in making certain decisions pertaining to inspection, repair, rehabilitation, replacement and demolition of RC member/structure in corrosive environment.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001353910
|
oai_dc
|
Detailed analysis and modelling of MR dampers at zero current
|
Detailed analysis and modelling of MR dampers at zero current
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"F. Weber(Structural Engineering Research); G. Feltrin(Structural Engineering Research laboratory); H. Distl(Maurer Söhne GmbH & Co. KG, Frankfurter Ring)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001470923
|
oai_dc
|
Seismic resistance of exterior beam-column joints with non-conventional confinement reinforcement detailing
|
Seismic resistance of exterior beam-column joints with non-conventional confinement reinforcement detailing
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Bindhu, K.R.(College of Engineering); Jaya, K.P(Anna University); Manicka Selvam, V.K.(National Institute of Technology)"
] |
The failure of reinforced concrete structures in recent earthquakes caused concern about the performance of beam column joints. Confinement of joint is one of the ways to improve the performance of beam column joints during earthquakes. This paper describes an experimental study of exterior beam-column joints with two non-conventional reinforcement arrangements. One exterior beam-column joint of a six story building in seismic zone III of India was designed for earthquake loading. The transverse reinforcement of
the joint assemblages were detailed as per IS 13920:1993 and IS 456:2000 respectively. The proposed nonconventional reinforcement was provided in the form of diagonal reinforcement on the faces of the joint, as a replacement of stirrups in the joint region for joints detailed as per IS 13920 and as additional reinforcement for joints detailed as per IS 456. These newly proposed detailing have the basic advantage of reducing the reinforcement congestion at the joint region. In order to study and compare the performance of joint with different detailing, four types of one-third scale specimens were cast (two numbers in each type).
The main objective of the present study is to investigate the effectiveness of the proposed reinforcement
detailing. All the specimens were tested under reverse cyclic loading, with appropriate axial load. From the
test results, it was found that the beam-column joint having confining reinforcement as per IS: 456 with nonconventional
detailing performed well. Test results indicate that the non-conventionally detailed specimens,
Type 2 and Type 4 have an improvement in average ductility of 16% and 119% than their conventionally
detailed counter parts (Type1 and Type 3). Further, the joint shear capacity of the Type 2 and Type 4
specimens are improved by 8.4% and 15.6% than the corresponding specimens of Type 1 and Type 3
respectively. The present study proposes a closed form expression to compute the yield and ultimate load of
the system. This is accomplished using the theory of statics and the failure pattern observed during testing.
Good correlation is found between the theoretical and experimental results.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001470921
|
oai_dc
|
Detection of delamination damage in composite beams and plates using wavelet analysis
|
Detection of delamination damage in composite beams and plates using wavelet analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"B.S. Bombale(Indian Institute of Technology Delhi); M.K. Singha(Indian Institute of Technology Delhi); S. Kapuria(Indian Institute of Technology Delhi)"
] |
The effectiveness of wavelet transform in detecting delamination damages in multilayered composite beams and plates is studied here. The damaged composite beams and plates are modeled in finite element software ABAQUS and the first few mode shapes are obtained. The mode shapes of the
damaged structures are then wavelet transformed. It is observed that the distribution of wavelet coefficients can identify the damage location of beams and plates by showing higher values of wavelet coefficients at the position of damage. The effectiveness of the method is studied for different boundary
conditions, damage location and size for single as well as multiple delaminations in composite beams and plates. It is observed that both discrete wavelet transform (DWT) and continuous wavelet transform
(CWT) can detect the presence and location of the damaged region from the mode shapes of the structures. DWT may be used to approximately evaluate the size of the delamination area, whereas, CWT is efficient to detect smaller delamination areas in composites.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001353350
|
oai_dc
|
Semi-active control of ship mast vibrations using magneto-rheological dampers
|
Semi-active control of ship mast vibrations using magneto-rheological dampers
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y.S. Cheng(Huazhong University of Science and Technology); F.T.K. Au(The University of Hong Kong); J.P. Zhong(Huazhong University of Science and Technology)"
] |
On marine vessels, delicate instruments such as navigation radars are normally mounted on ship masts. However the vibrations at the top of mast where the radar is mounted often cause serious deterioration in radar-tracking resolution. The most serious problem is caused by the rotational vibrations at the top of mast that may be due to wind loading, inertial loading from ship rolling and base excitations induced by the running propeller. This paper presents a method of semi-active vibration control using magneto-rheological (MR) dampers to reduce the rotational vibration of the mast. In the study, the classical optimal control algorithm, the independent modal space control algorithm and the double input – single output fuzzy control algorithm are employed for the vibration control. As the phenomenological model of an MR damper is highly nonlinear, which is difficult to analyse, a back- propagation neural network is trained to emulate the inverse dynamic characteristics of the MR damper in the analysis. The trained neural network gives the required voltage for each MR damper based on the displacement,
velocity and control force of the MR damper quickly. Numerical simulations show that the proposed control methods can effectively suppress the rotational vibrations at the top of mast.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001353226
|
oai_dc
|
Bree’s interaction diagram of beams with considering creep and ductile damage
|
Bree’s interaction diagram of beams with considering creep and ductile damage
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. Nayebi(Shiraz University)"
] |
The beams components subjected to the loading such as axial, bending and cyclic thermal loads were studied in this research. The used constitutive equations are those of elasto-plasticity coupled to ductile and/or creep damage. The nonlinear kinematic hardening behavior was considered in elastoplasticity modeling. The unified damage law proposed for ductile failure and fatigue by the author of Sermage et al. (2000) and Kachanov’s creep damage model applied to cyclic creep and low cycle fatigue of beams. Based on the results of the analysis, the shakedown limit loads were determined through the calculation of the residual strains developed in the beam analysis. The iterative technique determines the shakedown limit load in an iterative manner by performing a series of full coupled elastic–plastic and
continuum damage cyclic loading modeling. The maximum load carrying capacity of the beam can withstand, were determined and imposed on the Bree’s interaction diagram. Comparison between the shakedown diagrams generated by or without creep and/or ductile damage for the loading patterns was presented.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001352000
|
oai_dc
|
Rehabilitation of heavily earthquake damaged masonry building using steel straps
|
Rehabilitation of heavily earthquake damaged masonry building using steel straps
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Sinan Altin(Gazi University); Fikret Kuran(The Turkish Ministry of Public Works and Settlement); Özgür Anil(Gazi University); M. Emin Kara(Aksaray University)"
] |
The purpose of this study is to develop a rehabilitation technique for heavily earthquake damaged masonry buildings. A full scale one storey masonry building with window and door openings was manufactured and tested on the shock table by applying increased amplitude free vibration up to the
point where heavy earthquake damage was observed. Damaged test building was rehabilitated with vertical and diagonal steel straps and then tested again. The effectiveness of improvements obtained by the rehabilitation technique was investigated. Steel straps improved the lateral strength and stiffness of masonry walls and limited the lateral displacement of building. Stability of the masonry walls were also improved by the steel straps. Steel straps reduced the natural period of the earthquake damaged masonry
building and prevented the failure of the building at the same amplitude of free vibration.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001353895
|
oai_dc
|
Nonlinear inelastic analysis of steel-concrete composite beam-columns using the stability functions
|
Nonlinear inelastic analysis of steel-concrete composite beam-columns using the stability functions
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"박정웅(세종대학교); 김승억(세종대학교)"
] |
In this study, a flexibility-based finite element method considering geometric and material nonlinearities is developed for analyzing steel-concrete frame structures. The stability functions obtained from the exact buckling solution of the beam-column subjected to end moments are used to accurately capture the second-order effects. The proposed method uses the force interpolation functions, including a moment magnification due to the axial force and lateral displacement. Thus, only one element per a physical member can account for the interaction between the bending moment and the axial force in a rational way. The proposed method applies the Newton method based on the load control and uses the secant stiffness method, which is computationally both efficient and stable. According to the evaluation result of this study, the proposed method consistently well predicts the nonlinear inelastic behavior of steel-concrete composite frames and gives good efficiency.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351913
|
oai_dc
|
Aggregation multigrid method for schur complement system in FE analysis of continuum elements
|
Aggregation multigrid method for schur complement system in FE analysis of continuum elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jin Hwan Ko(Konkuk Univ., Korea); 이병채(KAIST)"
] |
An aggregation multigrid method (AMM) is a leading iterative solver in solid mechanics. Recently, AMM is applied for solving Schur Complement system in the FE analysis of shell structures. In this work, an extended application of AMM for solving Schur Complement system in the FE analysis of continuum elements is presented. Further, the performance of the proposed AMM in multiple load cases, which is a challenging problem for an iterative solver, is studied. The proposed method is developed by combining the substructuring and the multigrid methods. The substructuring method avoids factorizing the
full-size matrix of an original system and the multigrid method gives near-optimal convergence. This method is demonstrated for the FE analysis of several elastostatic problems. The numerical results show better performance by the proposed method as compared to the preconditioned conjugate gradient method.
The smaller computational cost for the iterative procedure of the proposed method gives a good alternative to a direct solver in large systems with multiple load cases.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351905
|
oai_dc
|
A new statistical moment-based structural damage detection method
|
A new statistical moment-based structural damage detection method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. Zhang(The Hong Kong Polytechnic University); Y. L. Xu(Hong Kong Polytechnic University); Y. Xia(The Hong Kong Polytechnic University); J. Li(Tongji University)"
] |
This paper presents a novel structural damage detection method with a new damage index based on the statistical moments of dynamic responses of a structure under a random excitation. After a brief introduction to statistical moment theory, the principle of the new method is put forward in terms of
a single-degree-of-freedom (SDOF) system. The sensitivity of statistical moment to structural damage is discussed for various types of structural responses and different orders of statistical moment. The formulae for statistical moment-based damage detection are derived. The effect of measurement noise on damage detection is ascertained. The new damage index and the proposed statistical moment-based damage detection method are then extended to multi-degree-of-freedom (MDOF) systems with resort to the leastsquares method. As numerical studies, the proposed method is applied to both single and multi-story shear buildings. Numerical results show that the fourth-order statistical moment of story drifts is a more sensitive indicator to structural stiffness reduction than the natural frequencies, the second order moment of story drift, and the fourth-order moments of velocity and acceleration responses of the shear building.
The fourth-order statistical moment of story drifts can be used to accurately identify both location and severity of structural stiffness reduction of the shear building. Furthermore, a significant advantage of the proposed damage detection method lies in that it is insensitive to measurement noise.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351887
|
oai_dc
|
Dynamics of a rotating beam with flexible root and flexible hub
|
Dynamics of a rotating beam with flexible root and flexible hub
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. A. Al-Qaisia(University of Jordan)"
] |
A mathematical model for the nonlinear dynamics of a rotating beam with flexible root attached to a rotating hub with elastic foundation is developed. The model is developed based on the large planar and flexural deformation theory and the potential energy method to account for axial shortening due to bending deformation. In addition the exact nonlinear curvature is used in the system potential energy. The Lagrangian dynamics and the assumed mode method is used to derive the nonlinear coupled equations of motion hub
rotation, beam tip deflection and hub horizontal and vertical displacements. The derived nonlinear model is simulated numerically and the results are presented and discussed for the effect of root flexibility, hub stiffness, torque type, torque period and excitation frequency and amplitude on the dynamic behavior of the rotating beam-hub and on its stability.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351793
|
oai_dc
|
Automatic generation of equilibrium and flexibility matrices for plate bending elements using Integrated Force Method
|
Automatic generation of equilibrium and flexibility matrices for plate bending elements using Integrated Force Method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"H.R. Dhananjaya(Manipal Institute Technology); J. Nagabhushanam(Indian Institute of Science); P.C. Pandey(Indian Institute of Science)"
] |
The Integrated Force Method (IFM) has been developed in recent years for the analysis of civil, mechanical and aerospace engineering structures. In this method all independent or internal forces are treated as unknown variables which are calculated by simultaneously imposing equations of
equilibrium and compatibility conditions. The solution by IFM needs the computation of element equilibrium and flexibility matrices from the assumed displacement, stress-resultant fields and material properties. This paper presents a general purpose code for the automatic generation of element equilibrium and flexibility matrices for plate bending elements using the Integrated Force Method. Kirchhoff and the Mindlin-Reissner plate theories have been employed in the code. Paper illustrates development of element
equilibrium and flexibility matrices for the Mindlin-Reissner theory based four node quadrilateral plate bending element using the Integrated Force Method.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351919
|
oai_dc
|
Elasticity solutions for a uniformly loaded annular plate of functionally graded materials
|
Elasticity solutions for a uniformly loaded annular plate of functionally graded materials
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"B. Yang(Zhejiang University); H.J. Ding(Zhejiang University); W.Q. Chen(Zhejiang University)"
] |
The axisymmetric problem of a functionally graded annular plate is considered by extending the theory of functionally graded materials plates suggested by Mian and Spencer (1998). In particular, their expansion formula for displacements is adopted and the hypothesis that the material parameters can
vary along the thickness direction in an arbitrary continuous fashion is retained. However, their analysis is extended here in two aspects. First, the material is assumed to be transversely isotropic, rather than isotropic. Second, the plate is no longer tractions-free on the top and bottom surfaces, but subject to uniform loads applied on the surfaces. The elasticity solutions are given for a uniformly loaded annular plate of functionally graded materials for a total of six different boundary conditions. Numerical results are given for a simply supported functionally graded annular plate, and good agreement with those by the classical plate theory is obtained.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351926
|
oai_dc
|
Characterization of elastic properties of pultruded profiles using model updating procedure with vibration test data
|
Characterization of elastic properties of pultruded profiles using model updating procedure with vibration test data
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jesiel Cunha(Federal University of Uberlândia); Emmanuel Foltête(University of Franche-Comt); Noureddine Bouhaddi(University of Franche-Comt)"
] |
In this paper, a model updating technique in dynamics is used to identify elastic properties for pultruded GFRP-Glass Fiber Reinforced Plastic framed structural systems used in civil construction. Traditional identification techniques for composite materials may be expensive, while this alternative
approach allows to identify several properties simultaneously, with very good precision. Furthermore, the procedure of a non-destructive type has a relatively simple implementation. Properties describing the mechanical behavior for beam and shell finite element modeling are identified. The used formulation is based on the minimization of eigensolution residuals. Important points concerning model updating procedures have been observed, such as the particular vibrational behavior of the test structure, the modeling strategies and the optimal placement of the sensors in the experimental procedure. Results obtained by experimental tests show the efficiency of the proposed procedure.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001470926
|
oai_dc
|
Flexural ductility of reinforced HSC beams strengthened with CFRP sheets
|
Flexural ductility of reinforced HSC beams strengthened with CFRP sheets
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Seyed Hamid Hashemi(Arak University); Ali Akbar Maghsoudi(Kerman University); Reza Rahgozar(Kerman University)"
] |
Externally bonding fiber reinforced polymer (FRP) sheets with an epoxy resin is an effective technique for strengthening and repairing reinforced concrete (RC) beams under flexural loads. Their resistance to electro-chemical corrosion, high strength-to-weight ratio, larger creep strain, fatigue resistance, and nonmagnetic and nonmetallic properties make carbon fiber reinforced polymer (CFRP) composites a viable alternative to bonding of steel plates in repair and rehabilitation of RC structures. The objective of this
investigation is to study the effectiveness of CFRP sheets on ductility and flexural strength of reinforced high strength concrete (HSC) beams. This objective is achieved by conducting the following tasks: (1) flexural
four-point testing of reinforced HSC beams strengthened with different amounts of cross-ply of CFRP sheets with different amount of tensile reinforcement up to failure; (2) calculating the effect of different layouts of
CFRP sheets on the flexural strength; (3) Evaluating the failure modes; (4) developing an analytical procedure based on compatibility of deformations and equilibrium of forces to calculate the flexural strength of reinforced HSC beams strengthened with CFRP composites; and (5) comparing the analytical calculations with experimental results.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001428143
|
oai_dc
|
Analytical solution of two-layer beam including interlayer slip and uplift
|
Analytical solution of two-layer beam including interlayer slip and uplift
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ales Kroflic(University of Ljubljana); Igor Planinc(University of Ljubljana); Miran Saje(University of Ljubljana); Bojan Cas(University of Ljubljana)"
] |
A mathematical model and its analytic solution for the analysis of stress-strain state of a linear elastic two-layer beam is presented. The model considers both slip and uplift at the interface. The solution is employed in assessing the effects of transverse and shear contact stiffnesses and the thickness of the interface layer on behaviour of nailed, two-layer timber beams. The analysis shows that the transverse contact stiffness and the thickness of the interface layer have only a minor influence on the stress-strain state in the beam and can safely be neglected in a serviceability limit state design.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001428149
|
oai_dc
|
Characterization and modeling of near-fault pulse-like strong ground motion via damage-based critical excitation method
|
Characterization and modeling of near-fault pulse-like strong ground motion via damage-based critical excitation method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Abbas Moustafa(Minia University); Izuru Takewaki(Kyoto University)"
] |
Near-fault ground motion with directivity or fling effects is significantly influenced by the rupture mechanism and substantially different from ordinary records. This class of ground motion has large amplitude and long period, exhibits unusual response spectra shapes, possesses high PGV/PGA and PGD/PGA ratios and is best characterized in the velocity and the displacement time-histories. Such ground motion is also characterized by its energy being contained in a single or very few pulses, thus capable of causing severe damage to the structures. This paper investigates the characteristics of near-fault pulse-like ground motions and their implications on the structural responses using new proposed measures, such as, the effective frequency range, the energy rate (in time and frequency domains) and the damage indices. The paper develops also simple mathematical expressions for modeling this class of ground motion and the associated structural responses, thus eliminating numerical integration of the equations of motion. An optimization technique is also developed by using energy concepts and damage indices for modeling this class of ground motion for inelastic structures at sites having limited earthquake data.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001428148
|
oai_dc
|
Pretension process control based on cable force observation values for prestressed space grid structures
|
Pretension process control based on cable force observation values for prestressed space grid structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Zhen Zhou(Southeast University); Shao-ping Meng(Southeast University); Jing Wu(Southeast University)"
] |
Pointing to the design requirement of prestressed space grid structure being the target cable force, the pretension scheme decision analysis method is studied when there’s great difference between structural actual state and the analytical model. Based on recursive formulation of cable forces, the simulative recursive system for pretension process is established from the systematic viewpoint, including four kinds of parameters, i.e., system initial value (structural initial state), system input value (tensioning control force scheme), system state parameters (influence matrix of cable forces), system output value (pretension accomplishment). The system controllability depends on the system state parameters. Based on cable force observation values, the influence matrix for system state parameters can be calculated, making the system controllable. Next, the pretension scheme decision method based on cable force observation values can be formed on the basis of iterative calculation for recursive system. In this way, the tensioning control force scheme that can meet the design requirement when next cyclic supplemental tension finished is obtained. Engineering example analysis results show that the proposed method in this paper can reduce a lot of cyclic tensioning work and meanwhile the design requirement can be met.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001428144
|
oai_dc
|
Nonlinear dynamic analysis of reinforced concrete shell structures
|
Nonlinear dynamic analysis of reinforced concrete shell structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"T.-H. Kim(Daewoo Institute of Construction Technology); J.-G. Park(Sungkyunkwan University); J.-H. Choi(Hankyong National University); 신현목(성균관대학교)"
] |
In this paper, a nonlinear finite element procedure is presented for the dynamic analysis of reinforced concrete shell structures. A computer program, named RCAHEST (Reinforced Concrete Analysis in Higher Evaluation System Technology), was used. A 4-node flat shell element with drilling rotational stiffness was used for spatial discretization. The layered approach was used to discretize the behavior of concrete and reinforcement in the thickness direction. Material nonlinearity was taken into account by using tensile, compressive and shear models of cracked concrete and a model of reinforcing steel. The smeared crack approach was incorporated. The low-cycle fatigue of both concrete and reinforcing bars was also considered to predict a reliable dynamic behavior. The solution to the dynamic response of reinforced concrete shell structures was obtained by numerical integration of the nonlinear equations of motion using Hilber-Hughes-Taylor (HHT) algorithm. The proposed numerical method for the nonlinear dynamic analysis of reinforced concrete shell structures was verified by comparison of its results with reliable experimental and analytical results.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001428147
|
oai_dc
|
Influence of lateral motion of cable stays on cable-stayed bridges
|
Influence of lateral motion of cable stays on cable-stayed bridges
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"P.H. Wang(Chung-Yuan University); M.Y. Liu(Chung-Yuan University); Y.T. Huang(Chung-Yuan University); L.C. Lin(Chung-Yuan University)"
] |
The aim of this paper concerns with the nonlinear analysis of cable-stayed bridges including the vibration effect of cable stays. Two models for the cable stay system are built up in the study. One is the OECS (one element cable system) model in which one single element per cable stay is used and the other is MECS (multi-elements cable system) model, where multi-elements per cable stay are used. A finite element computation procedure has been set up for the nonlinear analysis of such kind of structures. For shape finding of the cable-stayed bridge with MECS model, an efficient computation procedure is presented by using the two-loop iteration method (equilibrium iteration and shape iteration) with help of the catenary function method to discretize each single cable stay. After the convergent initial shape of the bridge is found, further analysis can then be performed. The structural behaviors of cable-stayed bridges influenced by the cable lateral motion will be examined here detailedly, such as the static deflection, the natural frequencies and modes, and the dynamic responses induced by seismic loading. The results show that the MECS model offers the real shape of cable stays in the initial shape, and all the natural frequencies and modes of the bridge including global modes and local modes. The global mode of the bridge consists of coupled girder, tower and cable stays motion and is a coupled mode, while the local mode exhibits only the motion of cable stays and is uncoupled with girder and tower. The OECS model can only offers global mode of tower and girder without any motion of cable stays, because each cable stay is represented by a single straight cable (or truss) element. In the nonlinear seismic analysis, only the MECS model can offer the lateral displacement response of cable stays and the axial force variation in cable stays. The responses of towers and girders of the bridge determined by both OECS- and MECSmodels have no great difference.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001428146
|
oai_dc
|
The use of discontinuous first and second-order mixed boundary elements for 2D elastostatics
|
The use of discontinuous first and second-order mixed boundary elements for 2D elastostatics
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.H. Severcan(Nigde University); A.K. Tanrikulu(Cukurova University); A.H. Tanrikulu(Cukurova University); I.O. Deneme(Aksaray University)"
] |
In classical higher-order discontinuous boundary element formulation for two-dimensional elastostatics, interpolation functions for different boundary variables (i.e., boundary displacements and tractions) are assumed to be the same. However, there is a derivational relationship between these variables. This paper presents a boundary element formulation, called Mixed Boundary Element Formulation, for two dimensional elastostatic problems in which above mentioned relationship is taking into account. The formulations are performed by using discontinuous first and second-order mixed boundary elements. Based on the formulations presented in this study, two computer softwares are developed and verified through some example problems. The results show that the present formulation is credible.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001428151
|
oai_dc
|
A new analytical method for deformation of composite steel-concrete straight box girders with interfacial slip
|
A new analytical method for deformation of composite steel-concrete straight box girders with interfacial slip
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Pengzhen Lu(Southwest Jiaotong University); Renda Zhao(Southwest Jiaotong University)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001428153
|
oai_dc
|
Free vibration analysis of a beam with arbitrarily distributed rigid beam segments using elastic-and-rigid-combined beam element
|
Free vibration analysis of a beam with arbitrarily distributed rigid beam segments using elastic-and-rigid-combined beam element
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jia-Jang Wu(National Kaohsiung Marine University)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001428150
|
oai_dc
|
A new high-order response surface method for structural reliability analysis
|
A new high-order response surface method for structural reliability analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hong-Shuang Li(Northwestern Polytechnical University); Zhen-Zhou Lu(Northwestern Polytechnical University); Hong-Wei Qiao(Northwestern Polytechnical University)"
] |
In order to consider high-order effects on the actual limit state function, a new response surface method is proposed for structural reliability analysis by the use of high-order approximation concept in this study. Hermite polynomials are used to determine the highest orders of input random variables, and the sampling points for the determination of highest orders are located on Gaussian points of Gauss-Hermite integration. The cross terms between two random variables, only in case that their corresponding percent contributions to the total variation of limit state function are significant, will be added to the response surface function to improve the approximation accuracy. As a result, significant reduction in computational cost is achieved with this strategy. Due to the addition of cross terms, the additional sampling points, laid on two-dimensional Gaussian points off axis on the plane of two significant variables, are required to determine the coefficients of the approximated limit state function. All available sampling points are employed to construct the final response surface function. Then, Monte Carlo Simulation is carried out on the final approximation response surface function to estimate the failure probability. Due to the use of high order polynomial, the proposed method is more accurate than the traditional second-order or linear response surface method. It also provides much more efficient solutions than the available high-order response surface method with less loss in accuracy. The efficiency and the accuracy of the proposed method compared with those of various response surface methods available are illustrated by five numerical examples.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351564
|
oai_dc
|
Numerical modeling for cyclic crack bridging behavior of fiber reinforced cementitious composites
|
Numerical modeling for cyclic crack bridging behavior of fiber reinforced cementitious composites
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"신경준(충남대학교); 이광명(성균관대학교); Sung-Pil Chang(Seoul National University)"
] |
Recently, many researches have been done to examine the behavior of fiber reinforced concrete (FRC) subjected to the static loading. However, a few studies have been devoted to cyclic behaviors of FRC. A main objective of this paper is to investigate the cyclic behavior of FRC through theoretical method. A new cyclic bridging model was proposed for the analysis of fiber reinforced cementitious composites under cyclic loading. In the model, non-uniform degradation of interfacial bonding under cyclic tension was considered. Fatigue test results for FRC were numerically simulated using proposed models and the proposed model is achieving better agreement than the previous model.
Consequently, the model can establish a basis for analyzing cyclic behavior of fiber reinforced composites.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351619
|
oai_dc
|
Finite element analysis of shear-deficient RC beams strengthened with CFRP strips/sheets
|
Finite element analysis of shear-deficient RC beams strengthened with CFRP strips/sheets
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"이행기(한국과학기술원); S. K. Ha(kaist); M. Afzal(kaist)"
] |
Performance of shear-deficient reinforced concrete (RC) beams strengthened with carbon fiber-reinforced polymer (CFRP) strips/sheets is analyzed through numerical simulations on four-point bending tests. The numerical simulations are carried out using the finite element (FE) program ABAQUS.
A micromechanics-based constitutive model (Liang et al. 2006) is implemented into the FE program ABAQUS to model CFRP strips/sheets. The predicted results are compared with experiment data (Khalifa and Nanni 2002) to assess the accuracy of the proposed FE analysis approach. A series of numerical tests are conducted to investigate the influence of stirrup lay-ups on the shear strengthening performance of the CFRP strips/sheets, to illustrate the influence of the damage parameters on the microcrack density
evolution in concrete, and to investigate the shear and flexural strengthening performance of CFRP strips/ sheets. It has been shown that the proposed FE analysis approach is suitable for the performance prediction of RC beams strengthened with CFRP strips/sheets.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351632
|
oai_dc
|
A locally refinable T-spline finite element method for CAD/CAE integration
|
A locally refinable T-spline finite element method for CAD/CAE integration
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Tae-Kyoung Uhm(KAIST); 김기승(LIG Nex1); Yu-Deok Seo(KAIST); 윤성기(KAIST)"
] |
T-splines are recently proposed mathematical tools for geometric modeling, which are generalizations of B-splines. Local refinement can be performed effectively using T-splines while it is not the case when B-splines or NURBS are used. Using T-splines, patches with unmatched boundaries can be
combined easily without special techniques. In the present study, an analysis framework using T-splines is proposed. In this framework, T-splines are used both for description of geometries and for approximation of solution spaces. This analysis framework can be a basis of a CAD/CAE integrated approach. In this approach, CAD models are directly imported as the analysis models without additional finite element modeling. Some numerical examples are presented to illustrate the effectiveness of the current analysis framework.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351604
|
oai_dc
|
Nonlinear model of reinforced concrete frames retrofitted by in-filled HPFRCC walls
|
Nonlinear model of reinforced concrete frames retrofitted by in-filled HPFRCC walls
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Chang-Geun Cho(Hanwha Research Institute of Technology); 하기주(경일대학교); 김윤용(Chungnam National University)"
] |
A number of studies have suggested that the use of high ductile and high shear materials, such as Engineered Cementitious Composites (ECC) and High Performance Fiber Reinforced Cementitious Composites (HPFRCC), significantly enhances the shear capacity of structural elements, even with/without shear reinforcements. The present study emphasizes the development of a nonlinear model of shear behaviour of a HPFRCC panel for application to the seismic retrofit of reinforced concrete buildings. To model the shear behaviour of HPFRCC panels, the original Modified Compression Field Theory (MCFT) for conventional reinforced concrete panels has been newly revised for reinforced HPFRCC panels, and is referred to here as the HPFRCC-MCFT model. A series of experiments was conducted to assess the shear behaviour of HPFRCC panels subjected to pure shear, and the proposed shear model has been verified through an experiment involving panel elements under pure shear. The proposed shear model of a HPFRCC panel has been applied to the prediction of seismic retrofitted reinforced concrete buildings with in-filled HPFRCC panels. In retrofitted structures, the in-filled HPFRCC element is regarded as a shear spring element of a low-rise shear wall ignoring the flexural response, and reinforced concrete elements for beam or beam-column member are modelled by a finite plastic hinge zone model. An experimental study of reinforced concrete frames with in-filled HPFRCC panels was also carried out and the analysis model was verified with correlation studies of experimental results.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351640
|
oai_dc
|
System identification of a building structure using wireless MEMS and PZT sensors
|
System identification of a building structure using wireless MEMS and PZT sensors
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hongjin Kim(Kyungpook National University); 김화중(경북대학교); Boung-Yong Kim(Kyungpook National University); 황재승(전남대학교)"
] |
A structural monitoring system based on cheap and wireless monitoring system is investigated in this paper. Due to low-cost and low power consumption, micro-electro-mechanical system (MEMS) is suitable for wireless monitoring and the use of MEMS and wireless communication can reduce system cost and simplify the installation for structural health monitoring. For system identification using wireless MEMS, a finite element (FE) model updating method through correlation with the initial analytical model
of the structure to the measured one is used. The system identification using wireless MEMS is evaluated experimentally using a three storey frame model. Identification results are compared to ones using data measured from traditional accelerometers and results indicate that the system identification using wireless MEMS estimates system parameters with reasonable accuracy. Another smart sensor considered in this paper for structural health monitoring is Lead Zirconate Titanate (PZT) which is a type of piezoelectric
material. PZT patches have been applied for the health monitoring of structures owing to their simultaneous sensing/actuating capability. In this paper, the system identification for building structures by using PZT
patches functioning as sensor only is presented. The FE model updating method is applied with the experimental data obtained using PZT patches, and the results are compared to ones obtained using wireless MEMS system. Results indicate that sensing by PZT patches yields reliable system identification results even though limited information is available.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351571
|
oai_dc
|
Finite element analysis of vehicle-bridge interaction by an iterative method
|
Finite element analysis of vehicle-bridge interaction by an iterative method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ji-Seong Jo(POSCO); 정형조(한국과학기술원); Hongjin Kim(Kyungpook National University)"
] |
In this paper, a new iterative method for solving vehicle-bridge interaction problems is proposed. Iterative methods have advantages over the non-iterative methods in that it is not necessary to update the system matrix for a given wheel location, and the method can be applied for a new type of car
or bridge with few or no modifications. In the proposed method, the necessity of system matrices update is eliminated using the equivalent interaction force acting on the bridge, which is obtained iteratively. Ballast stiffness is included in the interaction forces and the geometric compatibility at the contact points are used as convergence criteria. The bridge is considered as an elastic Bernoulli-Euler beam with surface irregularity and ballast stiffness. The moving vehicle is modeled as a multi-axle mass-spring-damper system having many degrees of freedom depending on the number of axles. The pitching effect, which is the interaction effect between the rear and front wheels when a vehicle begins to enter or leave the bridge, is also considered in the formulation including extended ground boundaries having surface irregularity and ballast stiffness. The applicability of the proposed method is illustrated in the numerical studies.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001351553
|
oai_dc
|
Structural damage detection in continuum structures using successive zooming genetic algorithm
|
Structural damage detection in continuum structures using successive zooming genetic algorithm
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"권영두(경북대학교); Hyun-Wook Kwon(Research Institute of Industrial Science & Technology); 김화중(경북대학교); Sim-Dong Yeo(Kyungpook National University)"
] |
This study utilizes the fine-tuning and small-digit characteristics of the successive zooming genetic algorithm (SZGA) to propose a method of structural damage detection in a continuum structure, where the differences in the natural frequencies of a structure obtained by experiment and FEM are
compared and minimized using an assumed location and extent of structural damage. The final methodology applied to the structural damage detection is a kind of pseudo-discrete-variable-algorithm that counts the soundness variables as one (perfectly sound) if they are above a certain standard, such as 0.99. This methodology is based on the fact that most well-designed structures exhibit failures at some critical point due to manufacturing error, while the remaining region is free of damage. Thus, damage of 1% (depending on the given standard) or less can be neglected, and the search concentrated on finding more serious failures. It is shown that the proposed method can find out the exact structural damage of the monitored structure and reduce the time and amount of computation.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350508
|
oai_dc
|
Study of two dimensional visco-elastic problems in generalized thermoelastic medium with heat source
|
Study of two dimensional visco-elastic problems in generalized thermoelastic medium with heat source
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Arup Baksi(Umes Chandra College); Bidyut Kumar Roy(Vivekananda College); Rasajit Kumar Bera(Heritage Institute of Technology)"
] |
In this paper, a thermo-viscoelastic problem in an infinite isotropic medium in two dimensions in the presence of a point heat source is considered. The fundamental equations of the problems of generalized thermoelasticity including heat sources in a thermo-viscoelastic media have been
derived in the form of a vector matrix differential equation in the Laplace-Fourier transform domain for a two dimensional problem. These equations have been solved by the eigenvalue approach. The results have been compared to those available in the existing literature. The graphs have been drawn for different cases.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350475
|
oai_dc
|
Static assessment of quadratic hybrid plane stress element using non-conforming displacement modes and modified shape functions
|
Static assessment of quadratic hybrid plane stress element using non-conforming displacement modes and modified shape functions
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kyoung-Sik Chun(BAU CONSULTANT Co., Ltd.); Samuel Kinde Kassegne(San Diego State University); 박원태(공주대학교)"
] |
In this paper, we present a quadratic element model based on non-conforming displacement modes and modified shape functions. This new and refined 8-node hybrid stress plane element consists of two additional non-conforming modes that are added to the translational degree of freedom to improve the behavior of a membrane component. Further, the modification of the shape functions through quadratic polynomials in x-y coordinates enables retaining reasonable accuracy even when the element becomes considerably distorted. To establish its accuracy and efficiency, the element is compared with existing elements and - over a wide range of mesh distortions – it is demonstrated to be exceptionally accurate in predicting displacements and stresses.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350524
|
oai_dc
|
A three-dimensional finite element analysis of two/multiple shots impacting on a metallic component
|
A three-dimensional finite element analysis of two/multiple shots impacting on a metallic component
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"T. Hong(Zhejiang University of Technology); J.Y. Ooi(University of Edinburgh); B.A. Shaw(University of Newcastle)"
] |
This paper describes a three-dimensional dynamic finite element analysis of two/multiple shots impacting on a metallic component. The model is validated against a published numerical study. An extensive parametric study is conducted to investigate the effect of shot impacting with overlap on the
resulting residual stress profile within the component, including time interval between shot impacts, separation distance between the impacting points, and impacting velocity of successive shots. Several meaningful conclusions can be drawn regarding the effect of shot impacting with overlap.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350456
|
oai_dc
|
Stochastic optimum design of linear tuned mass dampers for seismic protection of high towers
|
Stochastic optimum design of linear tuned mass dampers for seismic protection of high towers
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Giuseppe Carlo Marano(Technical University of Bari); Rita Greco(Technical University of Bari); Giuseppe Palombella(University of Basilicata)"
] |
This work deals with the design optimization of tuned mass damper (TMD) devices used for mitigating vibrations in high-rise towers subjected to seismic accelerations. A stochastic approach is developed and the excitation is represented by a stationary filtered stochastic process. The effectiveness of
the vibration control strategy is evaluated by expressing the objective function as the reduction factor of the structural response in terms of displacement and absolute acceleration. The mechanical characteristics of the tuned mass damper represent the design variables. Analyses of sensitivities are carried out by varying the input and structural parameters in order to assess the efficiency of the TMD strategy. Variations between two different criteria are also evaluated.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350516
|
oai_dc
|
Earthquake risk assessment of seismically isolated extradosed bridges with lead rubber bearings
|
Earthquake risk assessment of seismically isolated extradosed bridges with lead rubber bearings
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"김두기(군산대학교); 이진학(Korea Ocean Research and Development Institute,); Hyeong-Yeol Seo(Kunsan National University,); 장준호(계명대학교)"
] |
This study presents a method to evaluate the seismic risk of an extradosed bridge with seismic isolators of lead rubber bearings (LRBs), and also to show the effectiveness of the LRB isolators on the extradosed bridge, which is one of the relatively flexible and lightly damped structures in terms of seismic risk. Initially, the seismic vulnerability of a structure is evaluated, and then the seismic hazard of a specific site is rated using an earthquake data set and seismic hazard maps in Korea. Then, the seismic risk of the structure is assessed. The nonlinear seismic analyses are carried out to consider plastic deformation of bridge columns and the nonlinear characteristics of soil foundation. To describe the nonlinear behaviour of a column, the ductility demand is adopted, and the moment-curvature relation of a column is assumed to be bilinear hysteretic. The fragility curves are represented as a log-normal distribution function for column damage, movement of superstructure, and cable yielding. And the seismic hazard at a specific site is estimated using the available seismic hazard maps. The results show that in seismically-isolated extradosed bridges under earthquakes, the effectiveness of the isolators is much more noticeable in the columns than the cables and girders.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350464
|
oai_dc
|
Inclined yield lines in flange outstands
|
Inclined yield lines in flange outstands
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.R. Bambach(Monash University)"
] |
While spatial plastic mechanism analysis has been widely and successfully applied to thinwalled steel structures to analyse the post-failure behaviour of sections and connections, there remains some contention in the literature as to the basic capacity of an inclined yield line. The simple inclined hinge commonly forms as part of the more complex spatial mechanism, which may involve a number of hinges perpendicular or inclined to the direction of thrust. In this paper some of the existing theories are compared with single inclined yield lines that form in flange outstands, by comparing the theories with
plate tests of plates simply supported on three sides with the remaining (longitudinal) edge free. The existing mechanism theories do not account for different in-plane displacement gradients of the loaded edge, nor the slenderness of the plates, and produce conservative results. A modified theory is presented whereby uniform and non-uniform in-plane displacements of the loaded edge of the flange, and the slenderness of the flange, are accounted for. The modified theory is shown to compare well with the plate
test data, and its application to flanges that are components of sections in compression and/or bending is presented.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350498
|
oai_dc
|
An absolute displacement approach for modeling of sliding structures
|
An absolute displacement approach for modeling of sliding structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. Krishnamoorthy(Manipal Institute of Technology)"
] |
A procedure to analyse the space frame structure fixed at base as well as resting on sliding bearing using total or absolute displacement in dynamic equation is developed. In the present method, the effect of ground acceleration is not considered as equivalent force. Instead, the ground acceleration is considered as a known value in the acceleration vector at degree of freedom corresponding to base of the structure when the structure is in non-sliding phase. When the structure is in sliding phase, only a force
equal to the maximum frictional resistance is applied at base. Also, in this method, the stiffness matrix, mass matrix and the damping matrix will not change when the structure enters from one phase to another.
The results obtained from the present method using absolute displacement approach are compared with the results obtained from the analysis of structure using relative displacement approach. The applicability of the analysis is also demonstrated to obtain the response of the structure resting on sliding bearing with restoring force device.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350255
|
oai_dc
|
Application of continuous wavelet transform to detect damage in thin-walled beams coupled in bending and torsion
|
Application of continuous wavelet transform to detect damage in thin-walled beams coupled in bending and torsion
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hakan Gökdag(Uluda University)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001350229
|
oai_dc
|
Mesh distortion, locking and the use of metric trial functions for displacement type finite elements
|
Mesh distortion, locking and the use of metric trial functions for displacement type finite elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Surendra Kumar(CSIR Centre for Mathematical Modelling and Computer Simulation); G. Prathap(CSIR Centre for Mathematical Modelling and Computer Simulation)"
] |
The use of metric trial functions to represent the real stress field in what is called the unsymmetric finite element formulation is an effective way to improve predictions from distorted finite elements. This approach works surprisingly well because the use of parametric functions for the test functions satisfies the continuity conditions while the use of metric (Cartesian) shape functions for the trial functions attempts to ensure that the stress representation during finite element computation can retrieve in a best-fit manner, the actual variation of stress in the metric space. However, the issue of how
to handle situations where there is locking along with mesh distortion has never been addressed. In this paper, we show that the use of a consistent definition of the constrained strain field in the metric space can ensure a lock-free solution even when there is mesh distortion. The three-noded Timoshenko beam element is used to illustrate the principles. Some significant conclusions are drawn regarding the optimal strategy for finite element modelling where distortion effects and field-consistency requirements have to
be reconciled simultaneously.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350249
|
oai_dc
|
Problems with a popular thick plate element and the development of an improved thick plate element
|
Problems with a popular thick plate element and the development of an improved thick plate element
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Cheng Y.M.(Hong Kong Polytechnic University); Law C.W.(Hong Kong SAR Government)"
] |
Some unreasonable results from the use of a popular thick plate element are discovered from the analysis of a raft foundation and a pile cap in Hong Kong. To overcome the problems, the authors have developed a new shear deformable beam which can be extended to a general quadrilateral shear
deformable plate. The behaviour of this new element under several interesting cases is investigated, and it is demonstrated that the new element possesses very high accuracy under different depth/span ratios, and the results from this new element are good even for a coarse mesh.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350190
|
oai_dc
|
Discrete singular convolution for buckling analyses of plates and columns
|
Discrete singular convolution for buckling analyses of plates and columns
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ömer Civalek(Akdeniz University); Altu Yava(Bal kesir University)"
] |
In the present study, the discrete singular convolution (DSC) method is developed for buckling analysis of columns and thin plates having different geometries. Regularized Shannon’s delta (RSD) kernel is selected as singular convolution to illustrate the present algorithm. In the proposed
approach, the derivatives in both the governing equations and the boundary conditions are discretized by the method of DSC. The results obtained by DSC method were compared with those obtained by the other numerical and analytical methods.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350185
|
oai_dc
|
Seismic performance assessment of reinforced concrete bridge piers supported by laminated rubber bearings
|
Seismic performance assessment of reinforced concrete bridge piers supported by laminated rubber bearings
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"T. H. Kim(Daewoo Institute of Construction Technology); Y. J. Kim(Daewoo Institute of Construction Technology); H. M. Shin(Sungkyunkwan University)"
] |
This paper presents a nonlinear finite element procedure accounting for the effects of geometric as well as material nonlinearities for reinforced concrete bridge piers supported by laminated rubber bearings. Reinforced concrete bridge piers supported by laminated rubber bearings and carrying a
cyclic load were analyzed by using a special purpose, nonlinear finite element program, RCAHEST. For reinforced concrete, the proposed robust nonlinear material model captures the salient response characteristics of the bridge piers under cyclic loading conditions and addresses with the influence of geometric nonlinearity on post-peak response of the bridge piers by transformations between local and global systems. Seismic isolator element to predict the behaviors of laminated rubber bearings is also developed. The seismic performance of reinforced concrete bridge piers supported by laminated rubber bearings is assessed analytically. The results show good correlation between the experimental findings and numerical predictions, and demonstrate the reliability and robustness of the proposed analytical model.
Additionally, the studies and discussions presented in this investigation provide an insight into the key behavioral aspects of reinforced concrete bridge piers supported by laminated rubber bearings.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350236
|
oai_dc
|
Brittle fracture analysis of the offset-crack DCDC specimen
|
Brittle fracture analysis of the offset-crack DCDC specimen
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.R. Ayatollahi(Iran University of Science and Technology); S. Bagherifard(Fatigue and Fracture Research Laboratory)"
] |
Applications of fracture mechanics in the strength analysis of ceramic materials have been lately studied by many researchers. Various test specimens have been proposed in order to investigate the fracture resistance of cracked bodies under mixed mode conditions. Double Cleavage Drilled Compression (DCDC) specimen, with a hole offset from the centerline is a configuration that is frequently used in subcritical crack growth studies of ceramics and glasses. This specimen exhibits a strong crack path stability
that is due to the strongly negative T-stress term. In this paper the maximum tensile stress (MTS) criterion is employed for investigating theoretically the initiation of brittle fracture in the DCDC specimen under mixed mode conditions. It is shown that the T-stress has a significant influence on the predicted fracture load and the crack initiation angle. The theoretical results suggest that brittle fracture in the DCDC specimen is controlled by a combination of the singular stresses (characterized by KI and KII) and the
non-singular stress term, T-stress.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350174
|
oai_dc
|
Identification of prestress force in a prestressed Timoshenko beam
|
Identification of prestress force in a prestressed Timoshenko beam
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Z. R. Lu(Sun Yat-sen University); J. K. Liu(Sun Yat-sen University); S. S. Law(The Hong Kong Polytechnic University)"
] |
This paper presents a new identification approach to prestress force. Firstly, a bridge deck is modeled as a prestressed Timoshenko beam. The time domain responses of the beam under sinusoidal excitation are studied based on modal superposition. The prestress force is then identified in the time
domain by a system identification approach incorporating with the regularization of the solution. The orthogonal polynomial function is used to improve the noise effect and obtain the derivatives of modal responses of the bridge. Good identification results are obtained from only the first few measured modal data under both sinusoidal and impulsive excitations. It is shown that the proposed method is insensitive to the magnitude of force to be identified and can be successfully applied to indirectly identify the
prestress force as well as other physical parameters, such as the flexural rigidity and shearing rigidity of a beam even under noisy environment.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350246
|
oai_dc
|
A model experiment of damage detection for offshore jacket platforms based on partial measurement
|
A model experiment of damage detection for offshore jacket platforms based on partial measurement
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Shi Xiang(Ocean University of China); Li Hua-jun(Ocean University of China); Yang Yong-chun(Ocean University of China); Gong Chen(Ocean University of China)"
] |
Noting that damage occurrence of offshore jacket platforms is concentrated in two structural regions that are in the vicinity of still water surface and close to the seabed, a damage detection method by using only partial measurement of vibration in a suspect region was presented in this paper, which can
not only locate damaged members but also evaluate damage severities. Then employing an experiment platform model under white-noise ground excitation by shaking table and using modal parameters of the first three modes identified by a scalar-type ARMA method on undamaged and damaged structures, the feasibility of the damage detection method was discussed. Modal parameters from eigenvalue analysis on the structural FEM model were also used to help the discussions. It is demonstrated that the damage
detection algorithm is feasible on damage location and severity evaluation for broken slanted braces and it is robust against the errors of baseline FEM model to real structure when the principal errors is formed by difference of modal frequencies. It is also found that Z-value changes of modal shapes also play a role in the precise detection of damage.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350143
|
oai_dc
|
Modal analysis and ambient vibration measurements on Mila-Algeria cable stayed bridge
|
Modal analysis and ambient vibration measurements on Mila-Algeria cable stayed bridge
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Abderrahmane Kibboua(National Earthquake Engineering Centre); Mohamed Naboussi Farsi(National Earthquake Engineering Centre); Jean-Luc Chatelain(Institut pour le Développement et la Recherche); Bertrand Guillier(Institut pour le Développement et la Recherche); Hakim Bechtoula(National Earthquake Engineering Centre); Youcef Mehani(National Earthquake Engineering Centre)"
] |
The seismic response analysis of an existing bridge needs a mathematical model that can be calibrated with measured dynamic characteristics. These characteristics are the periods and the associated mode shapes of vibration and the modal damping coefficients. This paper deals with the measurements
and the interpretation of the results of ambient vibration tests done on a newly erected cable stayed bridge across the Oued Dib River at Mila city in Algeria. The signal analysis of ambient vibration records will permit to determine the dynamic characteristics of the bridge. On the other hand, a 3-D model of the
bridge is developed in order to assess the frequencies and the associated modes of vibration. This information will be necessary in the planning of the test on the site (locations of the sensors, frequencies to be measured and the associated mode shapes of vibration). The frequencies predicted by the finite
element model are compared with those measured during full-scale ambient vibration measurements of the bridge. In the same way, the modal damping coefficients obtained by the random decrement method are compared to those of similar bridges.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350151
|
oai_dc
|
Geometry-dependent MITC method for a 2-node iso-beam element
|
Geometry-dependent MITC method for a 2-node iso-beam element
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"이필승(한국과학기술원); Hyuk-Chun No(Sejong University); Chang-Koon Choi(KAIST)"
] |
In this paper, we present an idea of the geometry-dependent MITC method. The simple concept is exemplified to improve a 2-node iso-beam (isoparametric beam) finite element of varying section. We first study the behavior of a standard 2-node iso-beam finite element of prismatic section,
which has been widely used with reduced integration (or the equivalent MITC method) in order to avoid shear locking. Based on analytical studies on cantilever beams of varying section, we propose the axial strain correction (ASC) scheme and the geometry-dependent tying (GDT) scheme for the 2-node iso-beam element. We numerically analyze varying section beam problems and present the improved performance by using both ASC and GDT schemes.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350147
|
oai_dc
|
A methodology to estimate earthquake induced worst failure probability of inelastic systems
|
A methodology to estimate earthquake induced worst failure probability of inelastic systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Bulent Akbas(Gebze Institute of Technology); Mustafa Nadar(Gebze Institute of Technology); Jay Shen(Illinois Institute of Technology)"
] |
Earthquake induced hysteretic energy demand for a structure can be used as a limiting value of a certain performance level in seismic design of structures. In cases where it is larger than the hysteretic energy dissipation capacity of the structure, failure will occur. To be able to select the limiting value of hysteretic energy for a particular earthquake hazard level, it is required to define the variation of hysteretic energy in terms of probabilistic terms. This study focuses on the probabilistic evaluation of earthquake induced worst failure probability and approximate confidence intervals for inelastic singledegree-of-freedom (SDOF) systems with a typical steel moment connection based on hysteretic energy. For this purpose, hysteretic energy demand is predicted for a set of SDOF systems subject to an ensemble
of moderate and severe EQGMs, while the hysteretic energy dissipation capacity is evaluated through the previously published cyclic test data on full-scale steel beam-to-column connections. The failure probability corresponding to the worst possible case is determined based on the hysteretic energy demand and dissipation capacity. The results show that as the capacity to demand ratio increases, the failure probability decreases dramatically. If this ratio is too small, then the failure is inevitable.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350162
|
oai_dc
|
Discrete singular convolution method and applications to free vibration analysis of circular and annular plates
|
Discrete singular convolution method and applications to free vibration analysis of circular and annular plates
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ömer Civalek(Akdeniz University)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001350130
|
oai_dc
|
Dynamic analysis of 3-D structures with adaptivity in RBF of dual reciprocity BEM
|
Dynamic analysis of 3-D structures with adaptivity in RBF of dual reciprocity BEM
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S.H. Razaee(Tehran University); A. Noorzad(Tehran University)"
] |
A new adaptive dual reciprocity boundary element method for dynamic analysis of 3-D structures is presented in this paper .It is based on finding the best approximation function of a radial basis function (RBF) group which minimize the error of displacement field expansion. Also, the effects of some parameters such as the existence of internal points, number of RBF functions and position of collocation nodes in discontinuous elements are investigated in this adaptive procedure. Three numerical examples show improvement in dynamic response of structures with adaptive RBF in dual reciprocity with respect to ordinary BEM.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350136
|
oai_dc
|
A MOM-based algorithm for moving force identification: Part II – Experiment and comparative studies
|
A MOM-based algorithm for moving force identification: Part II – Experiment and comparative studies
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ling Yu(Jinan University); Tommy H.T. Chan(The Hong Kong Polytechnic Univ.); Jun-hua Zhu(Changjiang River Scientific Research Institute)"
] |
A MOM-based algorithm (MOMA) has been developed for moving force identification from dynamic responses of bridge in the companion paper. This paper further evaluates and investigates the properties of the developed MOMA by experiment in laboratory. A simply supported bridge model and a
few vehicle models were designed and constructed in laboratory. A series of experiments have then been conducted for moving force identification. The bending moment and acceleration responses at several measurement stations of the bridge model are simultaneously measured when the model vehicle moves across the bridge deck at different speeds. In order to compare with the existing time domain method (TDM), the best method for moving force identification to date, a carefully comparative study scheme was planned and conducted, which includes considering the effect of a few main parameters, such as basis function terms, mode number involved in the identification calculation, measurement stations, executive CPU time, Nyquist fraction of digital filter, and two different solutions to the ill-posed system equation of
moving force identification. It was observed that the MOMA has many good properties same as the TDM, but its CPU execution time is just less than one tenth of the TDM, which indicates an achievement in which the MOMA can be used directly for real-time analysis of moving force identification in field.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350132
|
oai_dc
|
A MOM-based algorithm for moving force identification: Part I – Theory and numerical simulation
|
A MOM-based algorithm for moving force identification: Part I – Theory and numerical simulation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ling Yu(Jinan University); Tommy H.T. Chan(The Hong Kong Polytechnic Univ.); Jun-hua Zhu(Changjiang River Scientific Research Institute)"
] |
The moving vehicle loads on a bridge deck is one of the most important live loads of bridges. They should be understood, monitored and controlled before the bridge design as well as when the bridge is open for traffic. A MOM-based algorithm (MOMA) is proposed for identifying the timevarying
moving vehicle loads from the responses of bridge deck in this paper. It aims at an acceptable solution to the ill-conditioning problem that often exists in the inverse problem of moving force identification. The moving vehicle loads are described as a combination of whole basis functions, such as orthogonal Legendre polynomials or Fourier series, and further estimated by solving the new system equations developed with the basis functions. A number of responses have been combined, some numerical simulations on single axle, two axle and multiple-axle loads, being either constant or timevarying,
have been carried out and compared with the existing time domain method (TDM) in this paper. The illustrated results show that the MOMA has higher identification accuracy and robust noise immunity as well as producing an acceptable solution to ill-conditioning cases to some extent when it is used to
identify the moving force from bridge responses.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001350157
|
oai_dc
|
Design of tensegrity structures using artificial neural networks
|
Design of tensegrity structures using artificial neural networks
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ramakanta Panigrahi(Indian Institute of Technology Delhi); Ashok Gupta(Indian Institute of Technology Delhi); Suresh Bhalla(Indian Institute of Technology Delhi)"
] |
This paper focuses on the application of artificial neural networks (ANN) for optimal design of tensegrity grid as light-weight roof structures. A tensegrity grid, 2 m × 2 m in size, is fabricated by integrating four single tensegrity modules based on half-cuboctahedron configuration, using galvanised
iron (GI) pipes as struts and high tensile stranded cables as tensile elements. The structure is subjected to destructive load test during which continuous monitoring of the prestress levels, key deflections and
strains in the struts and the cables is carried out. The monitored structure is analyzed using finite element method (FEM) and the numerical model verified and updated with the experimental observations. The paper then explores the possibility of applying ANN based on multilayered feed forward back propagation algorithm for designing the tensegrity grid structure. The network is trained using the data generated from a finite element model of the structure validated through the physical test. After training, the network output is compared with the target and reasonable agreement is found between the two. The results demonstrate the feasibility of applying the ANNs for design of the tensegrity structures.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001438455
|
oai_dc
|
Numerical analyses of the force transfer in concrete-filled steel tube columns
|
Numerical analyses of the force transfer in concrete-filled steel tube columns
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Uwe Starossek(Hamburg University of Technology (TUHH)); Nabil Falah(Hamburg University of Technology (TUHH)); Thomas Löhning(Hamburg University of Technology (TUHH))"
] |
The interaction between steel tube and concrete core is the key issue for understanding the behavior of concrete-filled steel tube columns (CFTs). This study investigates the force transfer by natural bond or by mechanical shear connectors and the interaction between the steel tube and the concrete core under three types of loading. Two and three-dimensional nonlinear finite element models are developed to study the force transfer between steel tube and concrete core. The nonlinear finite element program ABAQUS is used. Material and geometric nonlinearities of concrete and steel are considered in the analysis. The damage plasticity model provided by ABAQUS is used to simulate the concrete material behavior. Comparisons between the finite element analyses and own experimental results are made to verify the finite element models. A good agreement is observed between the numerical and experimental results. Parametric studies using the numerical models are performed to investigate the effects of diameterto-thickness ratio, uniaxial compressive strength of concrete, length of shear connectors, and the tensile strength of shear connectors.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001438452
|
oai_dc
|
Piecewise exact solution for seismic mitigation analysis of bridges equipped with sliding-type isolators
|
Piecewise exact solution for seismic mitigation analysis of bridges equipped with sliding-type isolators
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"C.S. Tsai(C.S. Tsai); Yung-Chang Lin(Feng Chia University); Wen-Shin Chen(Feng Chia University); Tsu-Cheng Chiang(Earthquake Proof Systems, Inc.); Bo-Jen Chen(Earthquake Proof Systems, Inc.)"
] |
Recently, earthquake proof technology has been widely applied to both new and existing structures and bridges. The analysis of bridge systems equipped with structural control devices, which possess large degrees of freedom and nonlinear characteristics, is a result in time-consuming task. Therefore, a piecewise exact solution is proposed in this study to simplify the seismic mitigation analysis process for bridge systems equipped with sliding-type isolators. In this study, the simplified system having two degrees of freedom, to reasonably represent the large number of degrees of freedom of a bridge, and is modeled to obtain a piecewise exact solution for system responses during earthquakes. Simultaneously, we used the nonlinear finite element computer program to analyze he bridge responses and verify the accuracy of the proposed piecewise exact solution for bridge systems equipped with sliding-type isolators. The conclusions derived by comparing the results obtained from the piecewise exact solution and nonlinear finite element analysis reveal that the proposed solution not only simplifies the calculation process but also provides highly accurate seismic responses of isolated bridges under earthquakes.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001438456
|
oai_dc
|
A new structural damage detection index based on analyzing vibration modes by the wavelet transform
|
A new structural damage detection index based on analyzing vibration modes by the wavelet transform
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hakan Gökdag(Uludag University); Osman Kopmaz(Uludag University)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001438457
|
oai_dc
|
Closed-form solutions on bending of cantilever twisted Timoshenko beams under various bending loads
|
Closed-form solutions on bending of cantilever twisted Timoshenko beams under various bending loads
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Wei-Ren Chen(Chinese Culture University)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001438443
|
oai_dc
|
Accuracy of structural computation on simplified shape
|
Accuracy of structural computation on simplified shape
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"P. Marin(National Polytechnic Institute of Grenoble)"
] |
This paper focuses on a number of criteria that enable controlling the influence of geometric simplification on the quality of finite element (FE) computations. To perform the mechanical simulation of a component, the corresponding geometric model typically needs to be simplified in accordance with hypotheses adopted regarding the component’s mechanical behaviour. The method presented herein serves to compute an a posteriori indicator for the purpose of estimating the significance of each feature removal. This method can be used as part of an adaptive process of geometric simplification. If a shape detail removed during the shape simplification process proves to be influential on mechanical behaviour, the particular detail can then be reinserted into the simplified model, thus making it possible to readapt the initial simulation model. The fields of application for such a method are: static problems involving linear elastic behaviour, and linear thermal problems with stationary conduction.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001438448
|
oai_dc
|
New decoupled wavelet bases for multiresolution structural analysis
|
New decoupled wavelet bases for multiresolution structural analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Youming Wang(Xi’an Jiaotong University); Xuefeng Chen(Xi’an Jiaotong University); Yumin He(Xi’an Jiaotong University); Zhengjia He(Xi’an Jiaotong University)"
] |
One of the intractable problems in multiresolution structural analysis is the decoupling computation between scales, which can be realized by the operator-orthogonal wavelets based on the lifting scheme. The multiresolution finite element space is described and the formulation of multiresolution finite element models for structural problems is discussed. Various operator-orthogonal wavelets are constructed by the lifting scheme according to the operators of multiresolution finite element models. A dynamic multiresolution algorithm using operator-orthogonal wavelets is proposed to solve structural problems. Numerical examples demonstrate that the lifting scheme is a flexible and efficient tool to construct operator-orthogonal wavelets for multiresolution structural analysis with high convergence rate.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001438453
|
oai_dc
|
Free vibration analysis of moderately thick rectangular laminated composite plates with arbitrary boundary conditions
|
Free vibration analysis of moderately thick rectangular laminated composite plates with arbitrary boundary conditions
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A.M. Naserian-Nik(Ferdowsi University of Mashhad); M. Tahani(Ferdowsi University of Mashhad)"
] |
A semi-analytical method is presented for accurately prediction of the free vibration behavior of generally laminated composite plates with arbitrary boundary conditions. The method employs the technique of separation of spatial variables within Hamilton’s principle to obtain the equations of motion,including two systems of coupled ordinary homogeneous differential equations. Subsequently, by applying the laminate constitutive relations into the resulting equations two sets of coupled ordinary differential equations with constant coefficients, in terms of displacements, are achieved. The obtained differential equations are solved for the natural frequencies and corresponding mode shapes, with the use of the exact state-space approach. The formulation is exploited in the framework of the first-order shear deformation theory to incorporate the effects of transverse shear deformation and rotary inertia. The efficiency and accuracy of the present method are demonstrated by obtaining solutions to a wide range of problems and comparing them with finite element analysis and previously published results.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001438446
|
oai_dc
|
Shear deformation effect in flexural-torsional buckling analysis of beams of arbitrary cross section by BEM
|
Shear deformation effect in flexural-torsional buckling analysis of beams of arbitrary cross section by BEM
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"E.J. Sapountzakis(National Technical University); J.A. Dourakopoulos(National Technical University)"
] |
In this paper a boundary element method is developed for the general flexural-torsional buckling analysis of Timoshenko beams of arbitrarily shaped cross section. The beam is subjected to a compressive centrally applied concentrated axial load together with arbitrarily axial, transverse and torsional distributed loading, while its edges are restrained by the most general linear boundary conditions. The resulting boundary value problem, described by three coupled ordinary differential equations, is solved employing a boundary integral equation approach. All basic equations are formulated with respect to the principal shear axes coordinate system, which does not coincide with the principal bending one in a nonsymmetric cross section. To account for shear deformations, the concept of shear deformation coefficients is used. Six coupled boundary value problems are formulated with respect to the transverse displacements, to the angle of twist, to the primary warping function and to two stress functions and solved using the Analog Equation Method, a BEM based method. Several beams are analysed to illustrate the method and demonstrate its efficiency and wherever possible its accuracy. The range of applicability of the thin-walled theory and the significant influence of the boundary conditions and the shear deformation effect on the buckling load are investigated through examples with great practical interest.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001438450
|
oai_dc
|
Post-buckling analysis of piles by perturbation method
|
Post-buckling analysis of piles by perturbation method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.H. Zhao(Hunan University); W. He(Changsha University of Science and Technology); Q.S. Li(Hunan University)"
] |
To investigate the critical buckling load and post-buckling behavior of an axially loaded pile entirely embedded in soil, the non-linear large deflection differential equation for a pinned pile, based on the Winkler-model and the discretionary distribution function of the foundation coefficient along pile shaft, was established by energy method. Assuming that the deflection function was a power series of some perturbation parameter according to the boundary condition and load in the pile, the non-linear large deflection differential equation was transformed to a series of linear differential equations by using perturbation approach. By taking the perturbation parameter at middle deflection, the higher-order asymptotic solution of load-deflection was then found. Effect of ratios of soil depth to pile length, and ratios of pile stiffness to soil stiffness on the critical buckling load and performance of piles (entirely embedded and partially embedded) after flexural buckling were analyzed. Results show that the buckling load capacity increases as the ratios of pile stiffness to soil stiffness increasing. The pile performance will be more stable when ratios of soil depth to pile length, and soil stiffness to pile stiffness decrease.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001363276
|
oai_dc
|
Analytical method for main cable configuration of two-span self-anchored suspension bridges
|
Analytical method for main cable configuration of two-span self-anchored suspension bridges
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Tan Yong-Gang(Dalian University of Technology); Gong Feng(Dalian University of Technology); Zhang Zhe(Dalian University of Technology)"
] |
토목공학
| null |
kci_detailed_000080.xml
|
||||
ART001363271
|
oai_dc
|
Free vibration of circular and annular membranes with varying density by the method of discrete singular convolution
|
Free vibration of circular and annular membranes with varying density by the method of discrete singular convolution
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hakan Ersoy(Akdeniz University); Lutfiye Ozpolat(Akdeniz University); Omer Civalek(Akdeniz University)"
] |
A numerical method is developed to investigate the effects of some geometric parameters and density variation on frequency characteristics of the circular and annular membranes with varying density. The discrete singular convolution method based on regularized Shannon’s delta kernel is applied to obtain the frequency parameter. The obtained results have been compared with the analytical and numerical results of other researchers, which showed well agreement.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001363270
|
oai_dc
|
Generalized fracture toughness for specimens with re-entrant corners: Experiments vs. theoretical predictions
|
Generalized fracture toughness for specimens with re-entrant corners: Experiments vs. theoretical predictions
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Alberto Carpinteri(Politecnico di Torino); Pietro Cornetti(Politecnico di Torino); Nicola Pugno(Politecnico di Torino); David Taylor(Trinity College); Alberto Sapora(Politecnico di Torino)"
] |
In this paper the results of a series of experimental tests upon three-point bending specimens made of polystyrene and containing re-entrant corners are firstly described. Tests involved different notch angles, different notch depths and finally different sizes of the samples. All the specimens broke at the defect, as expected because of the material brittleness and, hence, the generalized stress intensity factor was expected to be the governing failure parameter. Recorded failure loads are then compared with the predictions provided by a fracture criterion recently introduced in the framework of Finite Fracture Mechanics: fracture is assumed to propagate by finite steps, whose length is determined by the contemporaneous fulfilment of energy balance and stress requirements. This fracture criterion allows us to achieve the expression of the generalized fracture toughness as a function of the tensile strength, the fracture toughness and the notch opening angle. Comparison between theoretical predictions and experimental data turns out to be more than satisfactory.
|
토목공학
| null |
kci_detailed_000080.xml
|
|||
ART001363268
|
oai_dc
|
Development of analytical modeling for an energy-dissipating cladding panel
|
Development of analytical modeling for an energy-dissipating cladding panel
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"H. Maneetes(The Pennsylvania State University); A. M. Memari(The Pennsylvania State University)"
] |
Modern earthquake-resistant design aims to isolate architectural precast concrete panels from the structural system so as to reduce the interaction with the supporting structure and hence minimize damage. The present study seeks to maximize the cladding-structure interaction by developing an energydissipating cladding system (EDCS) that is capable of functioning both as a structural brace, as well as a source of energy dissipation. The EDCS is designed to provide added stiffness and damping to buildings with steel moment resisting frames with the goal of favorably modifying the building response to earthquake-induced forces without demanding any inelastic action and ductility from the basic lateral force resisting system. Because many modern building facades typically have continuous and large openings on top of the precast cladding panels at each floor level for window system, the present study focuses on spandrel type precast concrete cladding panel. The preliminary design of the EDCS was based on existing guidelines and research data on architectural precast concrete cladding and supplemental energy dissipation devices. For the component-level study, the preliminary design was validated and further refined based on the results of nonlinear finite element analyses. The stiffness and strength characteristics of the EDCS were established from a series of nonlinear finite element analyses and are discussed in detail in this paper.
|
토목공학
| null |
kci_detailed_000081.xml
|
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