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|---|---|---|---|---|---|---|---|---|---|---|---|---|
ART001197679
|
oai_dc
|
A refined discrete triangular Mindlin element for laminated composite plates
|
A refined discrete triangular Mindlin element for laminated composite plates
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Zengjie Ge(Dalian University of Technology); WanjiChen(Dalian University of Technology)"
] |
Based on the Mindlin plate theory, a refined discrete 15-DOF triangular laminated compositeplate finite element RDTMLC with the re-constitution of the shear strain is proposed. For constituting theelement displacement function, the exact displacement function of the Timoshenkos laminated compositebeam as the displacement on the element boundary is used to derive the element displacements. Theproposed element can be used for the analysis of both moderately thick and thin laminated compositeplate, and the convergence for the very thin situation can be ensured theoretically. Numerical examplespresented show that the present model indeed possesses the properties of higher accuracy for anisotropiclaminated composite plates and is fre of locking even for extremely thin laminated plates.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000874886
|
oai_dc
|
Point interpolation method based on local residual formulation using radial basis functions
|
Point interpolation method based on local residual formulation using radial basis functions
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"G. R. Liu(National University of Singapore); L.Yan(National University of Singapore); J.G.Wang(National University of Singapore); Y.T.Gu(National University of Singapore)"
] |
A local radial point interpolation method (LRPIM) based on local residual formulation ispresented and applied to solid mechanics in this paper. In LRPIM, the trial function is constructed by theradial point interpolation method (PIM) and establishes discrete equations through a local residualformulation, which can be carried out nodes by nodes. Therefore, element connectivity for trial functionand background mesh for integration is not necessary. Radial PIM is used for interpolation so thatsingularity in polynomial PIM may be avoided. Essential boundary conditions can be imposed by astraightforward and effective manner due to its Delta properties. Moreover, the approximation quality ofthe radial PIM is evaluated by the surface fitting of given functions. Numerical performance for thisLRPIM method is further studied through several numerical examples of solid mechanics.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000874789
|
oai_dc
|
Ultimate behavior of long-span steel arch bridges
|
Ultimate behavior of long-span steel arch bridges
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jin Cheng(Tsinghua University); Jian-JingJiang(Tsinghua University); Ru-ChengXiao(Tongji University); Hai-FanXiang(Tongji University)"
] |
Because of the increasing span of arch bridges, ultimate capacity analysis recently becomesmore focused both on design and construction. This paper investigates the static and ultimate behavior ofa long-span steel arch bridge up to failure and evaluates the overall safety of the bridge. The examplebridge is a long-span steel arch bridge with a 50 m-long central span under construction in Shanghai,China. This will be the longest central span of any arch bridge in the world. Ultimate behavior of theexample bridge is investigated using three methods. Comparisons of the accuracy and reliability of thethree methods are given. The effects of material nonlinearity of individual bridge element and distributionpattern of live load and initial lateral deflection of main arch ribs as well as yield stresses of material andchanges of temperature on the ultimate load-carrying capacity of the bridge have been studied. The resultsshow that the distribution patern of live load and yield streses of material have important effects onbridge behavior. The critical load analyses based on the linear buckling method and geometricallynonlinear buckling method considerably overestimate the load-carrying capacity of the bridge. Theultimate load-carrying capacity analysis and overall safety evaluation of a long-span steel arch bridgeshould be based on the geometrically and materially nonlinear buckling method. Finally, the in-planefailure mechanism of long-span steel arch bridges is explained by tracing the spread of plastic zones.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000855457
|
oai_dc
|
Dynamic characteristics of elastic beams subjected to traffic loads
|
Dynamic characteristics of elastic beams subjected to traffic loads
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Chia-Chih Tang(Chinese Military Academy); Yang-ChengWang(National Defense University)"
] |
The objective of this study is to investigate the dynamic behavior of elastic beams subjectedto moving loads. Although analytical methods are available, they have limitations with respect tocomplicated structures. The use of computer technology in recent years is an effective way to solve theproblem; thus using the latest technology this study establishes a finite-element solution procedure toinvestigate dynamic behaviors of a typical elastic beam having a set of constant geometric properties andvarious span lengths. Both the dead load of the beam and traffic load are applied in which the traffic loadis considered a concentrated moving force with various traveling passage speeds on the beam. Dynamicbehaviors including deflection, shear, and bending moment due to moving loads are obtained by bothanalytical and finite element methods; for simple structures, they have an excellent agreement. Thenumerical results show that based on analytical methods the fundamental mode is good enough toestimate the dynamic deflection along the beam, but is not suficient to simulate the total response of theshear force or the bending moment. The linear dynamic behavior of the elastic beams subjected tomultiple exciting loads can easily be found by linear superposition, and the geometric nonlinear resultscaused by large deformation and axial force of the beam are always underestimated with only a fewexceptions which are indicated. In order to make the results useful, they have been nondimensionalizedand presented in graphical form.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197473
|
oai_dc
|
Parametric study for buildings with combined displacement-dependent and velocity-dependent energy dissipation devices
|
Parametric study for buildings with combined displacement-dependent and velocity-dependent energy dissipation devices
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"W. S. Pong(San Francisco State University); C.S.Tsai(Feng Chia University); Ching-ShyangChen(Feng Chia University); Kuei-ChiChen(Feng Chia University)"
] |
The use of supplemental damping to dissipate seismic energy is one of the most economicaland effective ways to mitigate the effects of earthquakes on structures. Both displacement-dependent andvelocity-dependent devices dissipate earthquake-induced energy effectively. Combining displacement-dependent and velocity-dependent devices for seismic mitigation of structures minimizes the shortcomingsof individual dampers, and is the most economical solution for seismic mitigation. However, there are fewpublications related to the optimum distributions of combined devices in a multiple-bay frame building. Inthis paper, the effectiveness of a building consisting of multiple bays equipped with combineddisplacement-dependent and velocity-dependent devices is investigated. A four-story building with sixbays was selected as an example to examine the efficiency of the proposed combination methods. Theparametric study shows that appropriate arrangements of different kinds of devices make the devices moreefficient and economical.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197675
|
oai_dc
|
Buckling of rectangular plates with mixed edge supports
|
Buckling of rectangular plates with mixed edge supports
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. Xiang(University of Western Sydney); G.H.Su(University of Western Sydney)"
] |
This paper presents a domain decomposition method for buckling analysis of rectangularKirchhof plates subjected to uniaxial inplane load and with mixed edge support conditions. A plate isdecomposed into two rectangular subdomains along the change of the discontinuous support conditions.The automated Ritz method is employed to derive the governing eigenvalue equation for the plate system.Compatibility conditions are imposed for transverse displacement and slope along the interface of the twosubdomains by modifying the Ritz trial functions. The resulting Ritz function ensures that the transversedisplacement and slope are continuous along the entire interface of the two subdomains. The validity andaccuracy of the proposed method are verified with convergence and comparison studies. Buckling resultsare presented for several selected rectangular plates with various combination of mixed edge supportconditions.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001001924
|
oai_dc
|
Axisymmetrical free-vibration analysis of liquid-storagetanks considering the liquid compressibility
|
Axisymmetrical free-vibration analysis of liquid-storagetanks considering the liquid compressibility
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"조진래(부산대학교); Jin-KyuLee(Pusan National University)"
] |
In this paper, we address the numerical investigation on the effect of liquid compresibilityonto the natural frequency of liquid-filled containers. Traditionally the liquid motion has been treated asan ideal fluid motion. However, from the numerical experiments for the axisymmetrical free-vibration ofcylindrical liquid-storage tanks, we found that the relative difference in natural frequencies between idealand compressible motions becomes remarkable, as the slenderness of tank or the relative liquid-fil heightbecomes larger. Therefore, in such cases of dynamic systems, the liquid compressibility becomes animportant parameter, for the accurate vibration analysis. For the free-vibration analysis of compressibleliquid-structure interaction we employed the coupled finite element formulation expressed in terms of theacoustic wave pressure and the structure deformation.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000874792
|
oai_dc
|
General stress-strain model for concrete or masonryresponse under uniaxial cyclic compression
|
General stress-strain model for concrete or masonryresponse under uniaxial cyclic compression
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Lidia La Mendola(Universit？ di Palermo); MaurizioPapia(Universit？ di Palermo)"
] |
The paper proposes analytical forms able to represent with very good approximation theconstitutive law experimentally deducible by means of uniaxial cyclic compressive tests on materialhaving softening post-peak behaviour in compresion and negligible tensile strength. The envelope,unloading and reloading curves characterizing the proposed model adequately approach structuralresponses corresponding to diferent levels of nonlinearity and ductility, requiring a not very high numberof parameters to be calibrated experimentally. The reliability of the model is shown by comparing theresults that it is able to provide with the ones analytically deduced from two reference models (one forconcrete, another for masonry) available in the literature, and with experimental results obtained by theauthors in the framework of a research in progress.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000855381
|
oai_dc
|
Partial-interaction fatigue assessment of stud shear connectors in composite bridge beams
|
Partial-interaction fatigue assessment of stud shear connectors in composite bridge beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Rudolf Seracino(Adelaide University); DericJ.Oehlers(Adelaide University); MichaelF.Yeo(Adelaide University)"
] |
There is a growing demand to asses the remaing strength and endurance of existingcomposite steel and concrete bridge beams due to the aging infrastructure, increases in permissible vehicleweights and increases in their frequencies. As codes are generally dedicated to the design of newstructures, new procedures are required to aid in the assesment of existing bridges to ensure that they areutilised to the full. In this paper, simple expressions are presented to perform partial-interaction analysesdirectly from full-interaction analyses, so that the beneficial effect of partial-interaction on the shear forceson the shear connectors can be utilised in assesment to extend the fatigue life of simply supported bridgebeams and to determine the effect of remedial work if necessary. Use of the assessment technique isdescribed by way of an illustrative example.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000855454
|
oai_dc
|
Confidence region of identified parameters and optimalsensor locations based on sensitivity analysis
|
Confidence region of identified parameters and optimalsensor locations based on sensitivity analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"TetsushiKurita(Tokyo Electric Power Services Co. Ltd.); KunihitoMatsui(Tokyo Denki University)"
] |
This paper presents a computational method for a confidence region of identified parameterswhich are affected by measurement noise and error contained in prescribed parameters. The method isbased on sensitivities of the identified parameters with respect to model parameter error and measurementnoise along with the law of error propagation. By conducting numerical experiments on simple models, itis confirmed that the confidence region coincides well with the results of numerical experiments.Furthermore, the optimum arrangement of sensor locations is evaluated when uncertainty exists inprescribed parameters, based on the concept that square sum of coefficients of variations of identifiedresults attains minimum. Good agreement of the theoretical results with those of numerical simulationconfirmed validity of the theory.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000874787
|
oai_dc
|
Free vibration analysis of stiffened laminated plates using layered finite element method
|
Free vibration analysis of stiffened laminated plates using layered finite element method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Meiwen Guo(Parsons Brinkckerhoff); IssamE.Harik(University of Kentucky); Wei-XinRen(Fuzhou University)"
] |
The free vibration analysis of stiffened laminated composite plates has been performed usingthe layered (zigzag) finite element method based on the first order shear deformation theory. The layers ofthe laminated plate is modeled using nine-node isoparametric degenerated flat shell element. The stiffenersare modeled as three-node isoparametric beam elements based on Timoshenko beam theory. Bilinear in-plane displacement constraints are used to maintain the inter-layer continuity. A special lumping techniqueis used in deriving the lumped mass matrices. The natural frequencies are extracted using the subspaceiteration method. Numerical results are presented for unstiffened laminated plates, stiffened isotropicplates, stiffened symmetric angle-ply laminates, stiffened skew-symmetric angle-ply laminates andstiffened skew-symmetric cross-ply laminates. The effects of fiber orientations (ply angles), number oflayers, stiffener depths and degrees of orthotropy are examined.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000874720
|
oai_dc
|
Baffled fuel-storage container: parametric study on transient dynamic characteristics
|
Baffled fuel-storage container: parametric study on transient dynamic characteristics
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Sang-Young Lee(Pusan National University); Jin-RaeCho(Pusan National University); Tae-HakPark(Agency for Defense Development); Woo-YongLee(Agency for Defense Development)"
] |
In order to ensure the structural dynamic stability of moving liquid-storage containers, theflow motion of interior liquid should be appropriately supresed by means of mechanical devices such asthe disc-type elastic baffle. In practice, the design of a suitable bafle requires a priori the parametricdynamic characteristics of storage containers, with respect to the design parameters of bafle, such as theinstallation location and inner-hole size, the bafle number, and so on. In this paper, we intend toinvestigate the parametric effect of the bafle parameters on the transient dynamic behavior of acylindrical fuel-storage tank in an abrupt vertical acceleration motion. For this goal, we employ the ALE(arbitrary Lagrangian-Eulerian) kinematic description method incorporated with the finite element method.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197672
|
oai_dc
|
The fiber element technique for analysis of concrete-filled steel tubes under cyclic loads
|
The fiber element technique for analysis of concrete-filled steel tubes under cyclic loads
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. A. Golafshani(Sharif University of Technology); S.B.B.Aval(North Carolina State University); M.A.Saadeghvaziri(Department of Civil and Environmental Engineering, NJIT)"
] |
A beam-column fiber element for the large displacement, nonlinear inelastic analysis ofConcrete-Filled Steel Tubes (CFT) is implemented. The method of description is Total Lagrangianformulation. An 8 degree of fredom (DOF) element with three nodes, which has 3 DOF per end nodeand 2 DOF on the middle node, has been chosen. The quadratic Lagrangian shape functions for axialdeformation and the quartic Hermitian shape function for the transverse deformation are used. It isassumed that the perfect bond is maintained between steel shell and concrete core. The constitutivemodels employed for concrete and steel are based on the results of a recent study and include theconfinement and biaxial effects. The model is implemented to analyze several CFT columns underconstant and non-proportional fluctuating concentric axial load and cyclic lateral load. God agreementhas been found between experimental results and theoretical analysis.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000874788
|
oai_dc
|
Numerical solving of initial-value problems by Rbf basis functions
|
Numerical solving of initial-value problems by Rbf basis functions
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Blaz Gotovac(University of Split). Vedrana Kozulic(University of Split)"
] |
This paper presents a numerical procedure for solving initial-value problems using the specialfunctions which belong to a class of Rvachevs basis functions Rbf based on algebraic and trigonometricpolynomials. Because of infinite derivability of these functions, derivatives of all orders, required bydiferential equation of the problem and initial conditions, are used directly in the numerical procedure.The accuracy and stability of the proposed numerical procedure are proved on an example of a singledegree of freedom system. Critical time step was also determined. An algorithm for solving multipledegree of freedom systems by the collocation method was developed. Numerical results obtained by Rbffunctions are compared with exact solutions and results obtained by the most commonly used numericalprocedures for solving initial-value problems.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000874882
|
oai_dc
|
Comparative study on dynamic analyses of non-classically damped linear systems
|
Comparative study on dynamic analyses of non-classically damped linear systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Annalisa Greco(University of Catania); AdolfoSantini(University of Reggio Calabria)"
] |
In this paper some techniques for the dynamic analysis of non-classically damped linearsystems are reviewed and compared. All these methods are based on a transformation of the governingequations using a basis of complex or real vectors. Complex and real vector bases are presented andcompared. The complex vector basis is represented by the eigenvectors of the complex eigenproblemobtained considering the non-classical damping matrix of the system. The real vector basis is a set of Ritzvectors derived either as the undamped normal modes of vibration of the system, or by the loaddependent vector algorithm (Lanczos vectors). In this latter case the vector basis includes the staticcorrection concept. The rate of convergence of these bases, with reference to a parametric structuralsystem subjected to a fixed spatial distribution of forces, is evaluated. To this aim two error norms areconsidered, the first based on the spatial distribution of the load and the second on the shear force at thebase due to impulsive loading. It is shown that both error norms point out that the rate of convergence isstrongly influenced by the spatial distribution of the applied forces.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000855439
|
oai_dc
|
Analysis of high-speed vehicle-bridge interactions by a simplified 3-D model
|
Analysis of high-speed vehicle-bridge interactions by a simplified 3-D model
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Myung-Kwan Song(Korea Advanced Institute of Science and Technology); Chang-KoonChoi(Korea Advanced Institute of Science and Technology)"
] |
In this study, the analysis of high-speed vehicle-bridge interactions by a simplified 3-dimensional finite element model is performed. Since railroads are constructed mostly as double tracks,there exists eccentricity between the vehicle axle and the neutral axis of cross section of a railway bridge.Therefore, for the more efficient and accurate vehicle-bridge interaction analysis, the analysis modelshould include the eccentricity of axle loads and the effect of torsional forces acting on the bridge. Theinvestigation into the influences of eccentricity of the vehicle axle loads and vehicle speed on vehicle-bridge interactions are carried out for two cases. In the first case, only one train moves on its track and inthe other case, two trains move respectively on their tracks in the opposite direction. From the analysisresults of an existing bridge, the efficiency and capability of the simplified 3-dimensional model forpractical application can be also verified.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000874793
|
oai_dc
|
A matrix displacement formulation for minimum weightdesign of frames
|
A matrix displacement formulation for minimum weightdesign of frames
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Engin Orakdogen(Technical University of Istanbul)"
] |
A static linear programming formulation for minimum weight design of frames that is basedon a matrix displacement method is presented in this paper. According to elementary theory of plasticity,minimum weight design of frames can be carried out by using only the equilibrium equations, because thesystem is statically determinate when at an incipient collapse state. In the present formulation, a staticallydeterminate released frame is defined by introducing hinges into the real frame and the bending momentsin yield constraints are expressed in terms of unit hinge rotations and the external loads respectively, byutilizing the matrix displacement method. Conventional Simplex algorithm with some modifications isutilized for the solution of linear programing problem. As the formulation is based on matrixdisplacement method, it may be easily adopted to the weight optimization of frames with displacementand deformation limitations. Four illustrative examples are also given for comparing the results to thoseobtained in previous studies.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001195659
|
oai_dc
|
Stress wave propagation in 1-D and 2-D media usingSmooth Particle Hydrodynamics method
|
Stress wave propagation in 1-D and 2-D media usingSmooth Particle Hydrodynamics method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Z. S. Liu(Institute of High Performance Computing); S.Swaddiwudhipong(The National University of Singapore); C.G.Koh(The National University of Singapore)"
] |
The paper involves the study on the elastic and elasto-plastic stres wave propagation in the1-D and 2-D solid media. The Smoth Particle Hydrodynamics equations governing the elastic and elasto-plastic large deformation dynamic response of solid structures are presented. The proposed additionalstress points are introduced in the formulation to mitigate the tensile instability inherent in the SPHapproach. Both incremental rate approach and leap-frog algorithm for time integration are introduced andthe new solution algorithm is developed and implemented. Two examples on stress wave propagation inaluminium bar and 2-D elasto-plastic steel plate are included. Results from the proposed SPH approachare compared with available analytical values and finite element solutions. The comparison illustrates thatthe stres wave propagation problems can be effectively solved by the proposed SPH method. The studyshows that the SPH simulation is a reliable and robust tool and can be used with confidence to treattransient dynamics such as linear and non-linear transient stress wave propagation problems.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197673
|
oai_dc
|
Predicting the failure modes of monotonically loaded reinforced concrete exterior beam-column joints
|
Predicting the failure modes of monotonically loaded reinforced concrete exterior beam-column joints
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Pelin G. Bakir(Istanbul Technical University); HasanM.Bodurolu(Istanbul Technical University)"
] |
This study aims at postulating a simple methodology for predicting the failure modes ofmonotonically loaded reinforced concrete beam-column joints. All the factors that affect the failure modesof joints are discussed in detail using an experimental database of monotonically loaded exterior beam-column joints. The relative contributions of the strut and truss mechanisms to joint shear strength aredetermined based on the test results. A simple design equation for the beam longitudinal reinforcementratio for joints with low, medium and high amount of stirups is developed. The factors influencing thefailure modes of monotonically loaded exterior beam-column joints are investigated in detail. Designcharts that predict the failure modes of exterior beam-column connections both with and without stirrupsare developed. Experimental data are compared with the design charts. The results show that the simplemethodology gives very accurate predictions of the failure modes.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000855456
|
oai_dc
|
Evaluation of existing bridges using neural networks
|
Evaluation of existing bridges using neural networks
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Augusto V. Molina(Parson Transportation Group); KarenC.Chou(Minnesota State University)"
] |
The infrastructure system in the United States has been aging faster than the resourceavailable to restore them. Therefore decision for allocating the resources is based in part on the conditionof the structural system. This paper proposes to use neural network to predict the overall rating of thestructural system because of the successful applications of neural network to other fields which require aymptom-diagnostictype relationship. The goal of this paper is to illustrate the potential of using neuralnetwork in civil engineering applications and, particularly, in bridge evaluations. Data collected by theTenessee Department of Transportation were used as est bedfor the study. Multi-layer feed forwardnetworks were developed using the Levenberg-Marquardt training algorithm. All the neural networksconsisted of at least one hidden layer of neurons. Hyperbolic tangent transfer functions were used in thefirst hidden layer and log-sigmoid transfer functions were used in the subsequent hidden and outputlayers. The best performing neural network consisted of three hidden layers. This network contained threneurons in the first hidden layer, two neurons in the second hidden layer and one neuron in the thirdhidden layer. The neural network performed well based on a target eror of 10%. The results of this studyindicate that the potential for using neural networks for the evaluation of infrastructure systems is very good.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197471
|
oai_dc
|
A study on compressive strength of concrete in flexural regions of reinforced concrete beams using finite element analysis
|
A study on compressive strength of concrete in flexural regions of reinforced concrete beams using finite element analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Chang-Geun Cho(Kyungpook National University); HisatoHotta(Tokyo Institute of Technology)"
] |
Based on the orthotropic hypoelasticity formulation, a triaxial constitutive model of concreteis proposed. To account for increasing ductility in high confinement of concrete, the ductility enhancementis considered using so called the strain enhancement factor. It is also developed a three-dimensional finiteelement model for reinforced concrete structural members based on the proposed constitutive law ofconcrete with the smeared crack approach. The concrete confinement effects due to the beam-column jointare investigated through numerical examples for simple beam and structural beam member. Concrete atcompression fibers in the vicinity of beam-column joint behaves dominant not only by the uniaxialcompressive state but also by the biaxial and triaxial compressive states. For the reason of the severeconfinement of concrete in the beam-column joint, the flexural critical cross-section is observed at a smalldistance away from the beam-column joint. These observations should be utilized for the economic designwhen the concrete structural members are subjected to high confinement due to the influence of beam-column joint.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197472
|
oai_dc
|
The dynamic stability of a nonhomogeneous orthotropicelastic truncated conical shell under a time dependent external pressure
|
The dynamic stability of a nonhomogeneous orthotropicelastic truncated conical shell under a time dependent external pressure
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A.H.Sofiyev(Ondokuz Mayis University); O.Aksogan(Cukurova University)"
] |
In this research, the dynamic stability of an orthotropic elastic conical shell, with elasticity moduliand density varying in the thickness direction, subject to a uniform external pressure which is a power functionof time, has been studied. After giving the fundamental relations, the dynamic stability and compatibilityequations of a nonhomogeneous elastic orthotropic conical shell, subject to a uniform external presure, havebeen derived. Applying Galerkins method, these equations have been transformed to a pair of timedependent differential equations with variable coefficients. These diferential equations are solved usingthe method given by Sachenkov and Baktieva (1978). Thus, general formulas have been obtained for thedynamic and static critical external pressures and the pertinent wave numbers, critical time, critical pressureimpulse and dynamic factor. Finally, carrying out some computations, the effects of the nonhomogeneity, theloading speed, the variation of the semi-vertex angle and the power of time in the external pressureexpression on the critical parameters have been studied.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000855380
|
oai_dc
|
Computation of dynamic stiffness and flexibility for arbitrarily shaped two-dimensional membranes
|
Computation of dynamic stiffness and flexibility for arbitrarily shaped two-dimensional membranes
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. T. Chen(National Taiwan Ocean University); I.L.Chung(National Taiwan Ocean University)"
] |
In this paper, dynamic stiffness and flexibility for circular membranes are analytically derivedusing an efficient mixed-part dual boundary element method (BEM). We employ three approaches, thecomplex-valued BEM, the real-part and imaginary-part BEM, to determine the dynamic stiffness andflexibility. In the analytical formulation, the continuous system for a circular membrane is transformedinto a discrete system with a circulant matrix. Based on the properties of the circulant, the analyticalsolutions for the dynamic stiffness and flexibility are derived. In deriving the stiffness and flexibility, thespurious resonance is cancelled out. Numerical aspects are discussed and emphasized. The problem ofnumerical instability due to division by zero is avoided by choosing additional constraints from theinformation of real and imaginary parts in the dual formulation. For the overdetermined system, the leastsquares method is considered to determine the dynamic stiffness and flexibility. A general purposeprogram has been developed to test several examples including circular and square cases.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197677
|
oai_dc
|
A state space method for coupled flutter analysisof long-span bridges
|
A state space method for coupled flutter analysisof long-span bridges
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Quanshun Ding(Tongji University); AirongChen(Tongji University); HaifanXiang(Tongji University)"
] |
A state-space method is proposed to analyze the aerodynamically coupled flutter problems oflong-span bridges based on the modal coordinates of structure. The theory about complex modes isapplied in this paper. The general governing equation of the system is converted into a complex standardcharacteristic equation in a state space format, which contains only two variables. The proposed method isa single-parameter searching method about reduced velocity, and it need not choose the participatingmodes beforehand and has no requirement for the form of structure damping matrix. The informationabout variations of system characteristics with reduced velocity and wind velocity can be provided. Themethod is able to find automatically the lowest critical flutter velocity and give relative amplitudes, phasesand energy ratios of the participating modes in the flutter motion. Moreover, the flutter analysis ofJiangyin Yangtse suspension bridge with 1385 m main span is performed. The proposed method hasproved reliable in its methodology and efficient in its use.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001001925
|
oai_dc
|
Ductility and ductility reduction factor for MDOF systems
|
Ductility and ductility reduction factor for MDOF systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Alfredo Reyes-Salazar(Fraccionamiento Loma Linda)"
] |
토목공학
| null |
kci_detailed_000084.xml
|
||||
ART001002110
|
oai_dc
|
Structural dynamic optimization with probability constraints of frequency and mode
|
Structural dynamic optimization with probability constraints of frequency and mode
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jian-jun Chen(Xidian University); Jian-wenChe(Xidian University); Huai-anSun(Xidian University); Hong-boMa(Xidian University); Ming-taoCui(Xidian University)"
] |
The structural dynamic optimization problem based on probability is studied. Considering therandomness of structural physical parameters and the given constraint values, we develop a dynamicoptimization mathematical model of engineering structures with the probability constraints of frequency,forbidden frequency domain and the vibration mode. The sensitivity of structural dynamic characteristicsbased on probability is derived. Two examples illustrate that the optimization model and the methodapplied are rational and efficient.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001003094
|
oai_dc
|
Seismic assessment ofG transferG plate high rise buildings
|
Seismic assessment ofG transferG plate high rise buildings
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"R. K. L. Su(The University of Hong Kong); A.M.Chandler(The University of Hong Kong); J.H.Li(The University of Hong Kong); N.T.K.Lam(The University of Melbourne)"
] |
토목공학
| null |
kci_detailed_000084.xml
|
||||
ART001002297
|
oai_dc
|
Influence of end fixity on post-yield behaviors of a tubular member
|
Influence of end fixity on post-yield behaviors of a tubular member
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kyu Nam Cho(Hongik University)"
] |
토목공학
| null |
kci_detailed_000084.xml
|
||||
ART001001757
|
oai_dc
|
On the theory of curved anisotropic plate
|
On the theory of curved anisotropic plate
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Yih-Cherng Chiang(Chinese Culture Univ.)"
] |
A general theory which describes the elastic response of a curved anisotropic plate subjectedto stretching and bending will be developed by considering the nonlinear efect that reflecting the non-flatgeometry of the structure. By applying a newly derived 6 × 6 matrix constitutive relation between forceequations for a curved anisotropic plate is developed in the usual manner, namely, by consideration of theconstitutive relation and equilibrium equations. Solutions are obtained for simply-supported boundaryconditions and compared to corresponding solutions that neglecting the nonlinear efect in the analysis.structure is crucial for the curved plate analysis. Under certain curved plate geometries the unreasonableresults wil be induced by neglecting the nonlinear efect in the analysis.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114807
|
oai_dc
|
Transient stochastic analysis of nonlinear response of earth and rock-fill dams to spatially varying ground motion
|
Transient stochastic analysis of nonlinear response of earth and rock-fill dams to spatially varying ground motion
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kemal Haciefendioglu(Karadeniz Tech. Univ.)"
] |
The main purpose of this paper is to investigate the efect of transient stochastic analysis onnonlinear response of earth and rock-fil dams to spatially varying ground motion. The dam models arenonlinear variation of soil shear moduli and damping ratio as a function of shear strain. The spatialvariability of ground motion is taken into acount with the incoherence, wave-passage and site responseeffects. Stationary as well as transient stochastic response analyses are performed for the considered damtypes. A time dependent frequency response function is used throughout the study for transient stochasticresponses. It is observed that stationarity is a reasonable assumption for earth and rock-fill dams to typicaldurations of strong shaking.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002081
|
oai_dc
|
Seismic behavior of structures isolated with a hybrid system of rubber bearings
|
Seismic behavior of structures isolated with a hybrid system of rubber bearings
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Bo-Jen Chen(Earthquake Proof Systems, Inc.); L. L. Chung(Nat. Ctr. for Res. on Earthq. Eng.); Tsu-Cheng Chiang(Feng Chia Univ.); C. S. Tsai(Feng Chia Univ.)"
] |
The enlargement of interest in base isolators as an earthquake-proof design strategy has
dramatically accelerated experimental studies of elastomeric bearings worldwide. In this paper, a new base
isolator concept that is a hybrid system of rubber bearings is proposed. Uniaxial, biaxial, and triaxial
shaking table tests are also performed to study the seismic behavior of a 0.4-scale three-story isolated
steel structure in the National Center for Research on Earthquake Engineering in Taiwan. Experimental
results demonstrate that structures with a hybrid system of rubber bearings composed of stirruped rubber
bearings and laminated rubber bearings can actually decrease the seismic responses of the superstructure.
It has been proved through the shaking table tests that the proposed hybrid system of rubber bearings is a
very promising tool to enhance the seismic resistance of structures. Moreover, it is demonstrated that the
proposed analytical model in this paper can predict the mechanical behavior of the hybrid system of
rubber bearings and seismic responses of the base-isolated structures.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114849
|
oai_dc
|
Mode localization and veering of natural frequency loci in two circular plates coupled with a fluid
|
Mode localization and veering of natural frequency loci in two circular plates coupled with a fluid
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kyeong-Hoon Jeong(Korea Atomic Energy Res. Inst.)"
] |
An analytical method for the free vibration of two circular plates coupled with an inviscidand compressible fluid is developed by the Rayleigh-Ritz method. The fluid is bounded by a rigidtheoretical results could predict wel the fluid-coupled natural frequencies with an excellent accuracy whencompared with the finite element analysis results. As the fluid thicknes increases or the plate thicknesdifference increases, an abrupt curve veering in the natural frequency loci of the neighboring modes andin the higher modes and in the wide gap betwen the plates because of a decrease in the fluid couplingowing to the fluid dispersion efect.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001003266
|
oai_dc
|
Fuzzy reliability analysis of laminated composites
|
Fuzzy reliability analysis of laminated composites
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jianqiao Chen(Huazhong Univ. of Sci. and Tech.); Junhong Wei(Huazhong Univ. of Sci. and Tech.); Yurong Xu(Huazhong Univ. of Sci. and Tech.)"
] |
The strength behaviors of Fiber Reinforced Plastics (FRP) Composites can be greatlyinfluenced by the properties of constitutive materials, the laminate structures, and load conditions etc,accompanied by many uncertainty factors. So the reliability study on FRP is an important subject oflittle has been done on the roles played by fuzzy variables. In this paper, a fuzy reliability model forFRP laminates is established first, in which the loads are considered as random variables and the strengthsas fuzy variables. Then a numerical model is developed to ases the fuzzy reliability. The Monte Carlothe second part of this paper, a generalized fuzzy reliability model (GFRM) is proposed. By virtue of thefact that there may exist a series of states between the failure state and the function state, a fuzzyassumption for the structure state together with the probabilistic assumption for strength parameters isadopted to construct the GFRM of composite materials. By defining a generalized limit state function, the(FORM) applicable in calculating the reliability index. Several examples are worked out to show thevalidity of the models and the efficiency of the methods proposed in this paper. The parameter sensitivityanalysis shows that some of the mean values of the strength parameters have great influence on theand diferent fuzzy assumptions are also discussed. It is concluded that the GFRM is feasible to use, andcan provide an efective and synthetic method to evaluate the reliability of a system with diferent typesof uncertainty factors.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001003268
|
oai_dc
|
Effective length factor for columns in braced frames considering axial forces on restraining members
|
Effective length factor for columns in braced frames considering axial forces on restraining members
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M. R. Mahini(Persian Gulf Univ.); H. Seyyedian(Shiraz Univ.)"
] |
The effective length factor is a familiar concept for practicing engineers and has long beenan approach for column stability evaluations. Neglecting the effects of axial force in the restraingAlignment Charts, the conventional nomographs for K-Factor determination, are based on. A survey onthe problem reveals that the K-Factor of the columns may be significantly affected when the diferencesin axial forces are taken into account. In this paper a new iterative approach, with high convergence rate,critical member are presented and discussed in details. Such facilities are not available in the previouslypresented methods. A constructive methodology is outlined and the usefulness of the proposed algorithmis illustrated by numerical examples.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114848
|
oai_dc
|
On the natural frequencies and mode shapes of a multiple-step beam carrying a number of intermediate lumped masses and rotary inertias
|
On the natural frequencies and mode shapes of a multiple-step beam carrying a number of intermediate lumped masses and rotary inertias
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hsien-Yuan Lin(Nat. Sun Yat-Sen Univ.); Ying-Chien Tsai(Nat. Sun Yat-Sen Univ.)"
] |
In the existing reports regarding fre transverse vibrations of the Euler-Bernoulli beams, mostof them studied a uniform beam carying various concentrated elements (such as point masses, rotaryinertias, linear springs, rotational springs, spring-mass systems, …, etc.) or a stepped beam with one tothe numerical assembly method (NAM) to determine the exact natural frequencies and mode shapes of themultiple-step Euler-Bernoulli beams carrying a number of lumped masses and rotary inertias. First, thecoefficient matrices for an intermediate lumped mass (and rotary inertia), left-end support and right-endsystem is obtained using the numerical assembly technique of the conventional finite element method(FEM). Finally, the exact natural frequencies and the associated mode shapes of the vibrating system aredetermined by equating the determinant of the last overall coefficient matrix to zero and substituting theof distribution of lumped mases and rotary inertias on the dynamic characteristics of the multiple-stepbeam are also studied.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114806
|
oai_dc
|
An efficient computational method for stress concentration problems
|
An efficient computational method for stress concentration problems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Santosh Shrestha(Ehime Univ.); Mitao Ohga(Ehime Univ.)"
] |
In this paper a recently developed scaled boundary finite element method (SBFEM) isapplied to simulate stress concentration for two-dimensional structures. In addition, a simple andnon-singular terms, of the stress fields near crack-tip is presented. The formulation is formed bycomparing the displacement along the radial points ahead of the crack-tip with that of standard Williams’eigenfunction solution for the crack-tip. The validity of the formulation is examined by numericalavailable solutions in literatures. Based on the results of the study, it is conformed that the proposednumerical method can be applied to simulate stres concentrations in both cracked and uncracked structurecomponents more easily with relatively coarse and simple model than other computational methods.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114759
|
oai_dc
|
Self-consolidating concrete filled steel tube columns ？ Design equations for confinement and axial strength
|
Self-consolidating concrete filled steel tube columns ？ Design equations for confinement and axial strength
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M. Lachemi(Ryerson Univ.); K. M. A. Hossain(Ryerson Univ.); V. B. Lambros(Lafarge Materials & Construction Inc.)"
] |
This paper compares the performance of axially loaded concrete filled steel tube (CFST)
columns cast using a conventionally vibrated normal concrete (NC) and a novel self-consolidating
concrete (SCC) made with a new viscosity modifying admixture (VMA). A total of sixteen columns with
a standard compressive strength of about 50 MPa for both SCC and NC were tested by applying
concentric axial load through the concrete core. Columns were fabricated without and with longitudinal
and hoop reinforcement (Series I and Series II, respectively) in addition to the tube confinement. The
slenderness of the columns expressed as height to diameter ratio (H/D) ranged between 4.8 and 9.5 for
Series CI and between 3.1 and 6.5 for Series CII. The strength and ductility of SCC columns were found
comparable to those of their NC counterparts as the maximum strength enhancement in NC columns
ranged between 1.1% and 7.5% only. No significant difference in strain development was found due to
the presence of SCC or NC or due to the presence of longitudinal and hoop reinforcement. Biaxial stress
development in the steel tube as per von Mises yield criterion showed similar characteristics for both SCC
and NC columns. The confined strength (f 'cc) of SCC was found to be lower than that of NC and f 'cc also
decreased with the increase of slenderness of the columns. Analytical models for the prediction of
confined concrete strength and axial strength of CFST columns were developed and their performance
was validated through test results. The proposed models were found to predict the axial strength of CFST
columns better than existing models and Code based design procedures.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114805
|
oai_dc
|
An efficient high-order warping theory for laminated plates
|
An efficient high-order warping theory for laminated plates
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Zhongmin Deng(Beijing Univ. of Aeronautic and Astronautics); Chuanyue Huang(Chinese Helicopter Research and Design Institute)"
] |
The theory with hierarchical warping functions had been used to analyze composite thin-walled structure, laminated beam and had good results. In the present paper, a series of hierarchicalwarping functions are developed to analyze the cylindrical bending problems of composite lamina. Thesewarping functions which refine through-the-thickness variation of displacements were composed of basicand normal strain. Then the hierarchical finite element method was used to form a numerical algorithm.The distribution of the displacements, in-plane stresses, transverse shear stresses and transverse normalstress for composite laminate were analyzed with the present model. The results show that the presentmodel has precise mechanical response compared with the first deformation transverse theory and thecorective order affects the accuracy of result.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114760
|
oai_dc
|
Unique local deformations of the superelastic SMA rods during stress-relaxation tests
|
Unique local deformations of the superelastic SMA rods during stress-relaxation tests
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Muhammad Ashiqur Rahman(Bangladesh Univ. of Eng. & Technol.); Mujibur Rahman Khan(Bangladesh Univ. of Eng. & Technol.)"
] |
This paper studies mechanical behavior of the superelastic shape memory alloy (SMA) rodsin terms of local deformations and time via tensile loading-unloading cycles for both ends fixed endconstraints. Besides the unique stress induced martensitic transformation (SIMT), SMA’s time dependentbehavior when it is in mixed-phase condition upon loading and unloading, also need careful attention witha view of investigating the local deformation of the structural elements made of the same material. Withthis perspective, the so-called stres-relaxation tests have ben performed to demonstrate and investigateremarkable phenomena have been observed pertaining to SIMT, which are absent in traditional materialsand those unique phenomena have been explained qualitatively. For example, at the stopped loadingconditions the two ends (fixed end and moving end of the tensile testing machine) were in fixedaxial local deformation was shown by the extensometer placed at the midle of the SMA specimen. Itshould be noted that this peculiar behavior termed as ‘inertia driven SIMT’ occurs only when the loadingwas stoped at mixed phase condition. Besides this relaxation test for the SMA specimens, the same isshow no unusual increase of local strains during the stress relaxation tests.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002080
|
oai_dc
|
Modeling and prediction of buckling behavior of compression members with variability in material and/or section properties
|
Modeling and prediction of buckling behavior of compression members with variability in material and/or section properties
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M. A. Gadalla(American Univ. of Sharjah); J. A. Abdalla(American Univ. of Sharjah)"
] |
Buckling capacity of compression members may change due to inadvertent changes in themember section dimensions or material properties. This may be the result of repair, modification ofcapacity of compression members may be achieved through splicing of plates or utilization of compositematerials. It is very important for a designer to predict the buckling resistance of the compression memberand the important parameters that afect its buckling strength once changes in section and/or materiala compression member whose geometric and/or material properties has been altered resulting in a multi-step non-uniform section. This analytical solution accommodates the changes and modifications to thematerial and/or section properties of the compression member due to the factors mentioned. The analyticalas the repair stage of compression members. Three case studies are presented to show that the proposedanalytical solution is an efficient method for predicting the buckling strength of compression members thattheir section and/or material properties have been altered due to splicing, coping, notching, ducting andcorrosion.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115443
|
oai_dc
|
Efficient treatment of rubber friction problems in industrial applications
|
Efficient treatment of rubber friction problems in industrial applications
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"K. Hofstetter(Vienna Univ. of Technol.); J. Eberhardsteiner(Vienna Univ. of Technol.); H. A. Mang(Vienna Univ. of Technol.)"
] |
Friction problems involving rubber components are frequently encountered in industrial
applications. Their treatment within the framework of numerical simulations by means of the Finite
Element Method (FEM) is the main issue of this paper. Special emphasis is placed on the choice of a
suitable material model and the formulation of a contact model specially designed for the particular
characteristics of rubber friction. A coupled thermomechanical approach allows for consideration of the
influence of temperature on the frictional behavior. The developed tools are implemented in the
commercial FE code ABAQUS. They are validated taking the sliding motion of a rubber tread block as
example. Such simulations are frequently encountered in tire design and development. The simulations are
carried out with different formulations for the material and the frictional behavior. Comparison of the
obtained results with experimental observations enables to judge the suitability of the applied formulations
on a structural scale.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114761
|
oai_dc
|
Enhanced finite element modeling for geometric non-linear analysis of cable-supported structures
|
Enhanced finite element modeling for geometric non-linear analysis of cable-supported structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Myung-Kwan Song(Chungsuk Engineering Co., Ltd); Sun-Hoon Kim(Youngdong Univ.); Chang-Koon Choi(KAIST)"
] |
Enhanced three-dimensional finite elements for geometrically nonlinear analysis of cable-supported structures are presented. The cable element, derived by using the concept of an equivalentmodel the cables. The stability functions for a frame member are modified to obtain a numerically stablesolution. Various numerical examples are solved to ilustrate the versatility and eficiency of the proposedgeometricaly nonlinear analysis as well as free vibration analysis of three-dimensional cable-supportedstructures.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001001886
|
oai_dc
|
Seismic analysis of arch dams including dam-reservoir interaction via a continuum damage model
|
Seismic analysis of arch dams including dam-reservoir interaction via a continuum damage model
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M. Karaton(Firat Univ.); Y. Calayir(Firat Univ.); A. Bayraktar(Karadeniz Tech. Univ.)"
] |
In this study, the earthquake damage response of the concrete arch dams was investigatedincludes the strain softening behavior was selected for the concrete material. Fluid-structure interactionproblem was modeled by Lagrangian approach. Sommerfeld radiation condition was applied to thetruncated boundary of reservoir. The improved form of the HHT-α time integration algorithm was used inthe dynamic input, acceleration records of the 10 December 1967 Koyna earthquake were chosen. Theserecords were scaled with earthquake acceleration scale factor (EASF) and then used in the analyses.Solutions were obtained for empty and full reservoir cases. The effects of EASF and damping ratio on theresponse of the dam were studied.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115353
|
oai_dc
|
Mechanical analysis of non-uniform beams resting on nonlinear elastic foundation by the differential quadrature method
|
Mechanical analysis of non-uniform beams resting on nonlinear elastic foundation by the differential quadrature method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ming-Hung Hsu(Nat. Penghu Univ.)"
] |
A new approach using the differential quadrature method (DQM) is derived for analysis of
non-uniform beams resting on nonlinear media in this study. The influence of velocity dependent viscous
damping and strain rate dependent viscous damping is investigated. The results solved using the DQM
have excellent agreement with the results solved using the FEM. Numerical results indicated that the
DQM is valid and efficient for non-uniform beams resting on non-linear media.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115308
|
oai_dc
|
An analytical model of layered continuous beams with partial interaction
|
An analytical model of layered continuous beams with partial interaction
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Simon Schnabl(Univ. of Ljubljana); Igor Planinc(Univ. of Ljubljana); Miran Saje(Univ. of Ljubljana); Bojan Cas(Univ. of Ljubljana); Goran Turk(Univ. of Ljubljana)"
] |
Starting with the geometrically non-linear formulation and the subsequent linearization, thispaper presents a consistent formulation of the exact mechanical analysis of geometrically and materiallylinear beam theory. Constitutive laws of layer materials and relationships between interlayer slips andshear streses at the interface are assumed to be linear elastic. The formulation is first applied in theanalysis of a thre-layer simply supported beam. The results are compared to those of Goodman andPopov (1968) and to those obtained from the formulation of the European code for timber structures,completely, while the Eurocode 5 (1993) results differ to a certain degre. Next, the analytical solution isused in formulating a general procedure for the analysis of layered continuous beams. The applicationsshow the qualitative and quantitative effects of the layer and the interlayer slip stiffnesses on internalforces, streses and deflections of composite continuous beams.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001001556
|
oai_dc
|
Thermal vibration analysis of thick laminated plates by the moving least squares differential quadrature method
|
Thermal vibration analysis of thick laminated plates by the moving least squares differential quadrature method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Lanhe Wu(Shijiazhuang Railway Institute)"
] |
The stresses and deflections in a laminated rectangular plate under thermal vibration are
determined by using the moving least squares differential quadrature (MLSDQ) method based on the first
order shear deformation theory. The weighting coefficients used in MLSDQ approximation are obtained
through a fast computation of the MLS shape functions and their partial derivatives. By using this
method, the governing differential equations are transformed into sets of linear homogeneous algebraic
equations in terms of the displacement components at each discrete point. Boundary conditions are
implemented through discrete grid points by constraining displacements, bending moments and rotations
of the plate. Solving this set of algebraic equations yields the displacement components. Then substituting
these displacements into the constitutive equation, we obtain the stresses. The approximate solutions for
stress and deflection of laminated plate with cross layer under thermal load are obtained. Numerical
results show that the MLSDQ method provides rapidly convergent and accurate solutions for calculating
the stresses and deflections in a multi-layered plate of cross ply laminate subjected to thermal vibration of
sinusoidal temperature including shear deformation with a few grid points.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001001554
|
oai_dc
|
Overturning of rocking rigid bodies under transient ground motions
|
Overturning of rocking rigid bodies under transient ground motions
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Luigi Sorrentino(Universit？La Sapienza); Renato Masiani(Universit？La Sapienza); Luis D. Decanini(Universit？La Sapienza)"
] |
In seismic prone areas it is possible to meet very different objects (equipment components,
on shelf artefacts, simple architectural elements) that can be modelled as a rigid body rocking on a rigid
foundation. The interest in their behaviour can have different reasons: seismological, in order to estimate
the ground motion intensity, or more strictly mechanical, in order to limit the response severity and to
avoid overturning. The behaviour of many rigid bodies subjected to twenty wide ranging acceleration
recordings is studied here. The response of the blocks is described using kinematic and energy parameters.
A condition under which a so called scale effect is tangible is highlighted. The capacity of the signals to
produce overturning is compared to different ground motion parameters, and a good correlation with the
Peak Ground Velocity is unveiled.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001001885
|
oai_dc
|
Post-peak response analysis of SFRC columns including spalling and buckling
|
Post-peak response analysis of SFRC columns including spalling and buckling
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Rajesh P. Dhakal(Univ. of Canterbury)"
] |
Standard compression tests of steel fiber reinforced concrete (SFRC) cylinders are conductedto formulate compressive stres versus compressive strain relationship of SFRC. Axial pullout tests ofSFRC specimens are also conducted to explore its tensile stress strain relationship. Cover concretemodified to extend their application to SFRC. Thus obtained monotonic material models of concrete andreinforcing bars in SFRC members are combined with unloading/reloading loops used in the cyclicmodels of concrete and reinforcing bars in normal reinforced concrete. The resulting path-dependent cyclicof these models at member level is verified by simulating cyclic lateral loading tests of SFRC columnsunder constant axial compression. The analysis using the proposed SFRC models yield results that aremuch closer to the experimental results than the analytical results obtained using the normal reinforcedconcrete models are.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115354
|
oai_dc
|
Monte Carlo analysis of earthquake resistant R-C 3D shear wall-frame structures
|
Monte Carlo analysis of earthquake resistant R-C 3D shear wall-frame structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Beyza Taskin(Istanbul Tech. Univ.); Zeki Hasgur(Istanbul Tech. Univ.)"
] |
The theoretical background and capabilities of the developed program, SAR-CWF, forstochastic analysis of 3D reinforced-concrete shear wall-frame structures subject to seismic excitations ispresented. Incremental stiffness and strength properties of system members are modeled by extendedRoufaiel-Meyer hysteretic relation for bending while shear deformations for walls by Origin-Orientedyield capacities with respect to positive and negative bending, finite extensions of plastic hinges and P-δeffects are considered while strength deterioration is controlled by accumulated hysteretic energy.Simulated strong motions are obtained from a Gaussian white-noise filtered through Kanai-Tajimi filter.Dynamic equations of motion for the system are formed according to constitutive and compatibilityreduction scheme based on the series expansion of eigen-modes of the undamaged structure isimplemented. Time histories of seismic response statistics are obtained by utilizing the computer programsdeveloped for diferent types of structures.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115123
|
oai_dc
|
Finite element modelling of the shear behaviour of profiled composite walls incorporating steel-concrete interaction
|
Finite element modelling of the shear behaviour of profiled composite walls incorporating steel-concrete interaction
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"K. M. Anwar Hossain(Ryerson Univ.); H. D. Wright(Univ. of Strathclyde)"
] |
The novel form of composite walling system consists of two skins of profiled steel sheeting with an in-fill of concrete. The behaviour of such walling under in-plane shear is important in order to utilise this system as shear elements in a steel framed building. Steel sheet-concrete interface governs composite action, overall behaviour and failure modes of such walls. This paper describes the finite element (FE) modelling of the shear behaviour of walls with particular emphasis on the simulation of steel-concrete interface. The modelling of complex non-linear steel-concrete interaction in composite walls is conducted by using different FE models. Four FE models are developed and characterized by their approaches to simulate steel-concrete interface behaviour allowing either full or partial composite action. Non-linear interface or joint elements are introduced between steel and concrete to simulate partial composite action that allows steel-concrete in-plane slip or out of plane separation. The properties of such interface/joint elements are optimised through extensive parametric FE analysis using experimental results to achieve reliable and accurate simulation of actual steel-concrete interaction in a wall. The performance of developed FE models is validated through small-scale model tests. FE models are found to simulate strength, stiffness and strain characteristics reasonably well. The performance of a model with joint elements connecting steel and concrete layers is found better than full composite (without interface or joint elements) and other models with interface elements. The proposed FE model can be used to simulate the shear behaviour of composite walls in practical situation.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115124
|
oai_dc
|
Modelling and classification of tubular joint rigidity and its effect on the global response of CHS lattice girders
|
Modelling and classification of tubular joint rigidity and its effect on the global response of CHS lattice girders
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Wei Wang(Tongji Univ.); Yiyi Chen(Tongji Univ.)"
] |
In engineering practice, tubular connections are usually assumed pinned or rigid. Recent research showed that tubular joints may exhibit non-rigid behavior under axial or bending loads. This paper is concerned with establishing a new classification for tubular joints and investigating the effect of joint rigidity on the global behavior of CHS (Circular Hollow Section) lattice girders. Parametric formulae for predicting tubular joint rigidities are proposed, which are based on the finite element analyses through systematic variation of the main geometric parameters. Comparison with test results proves the reliability of these formulae. By considering the deformation patterns of respective parts of Vierendeel lattice girders, the boundary between rigid and semirigid tubular connections is built in terms of joint bending rigidity. In order to include characteristics of joint rigidity in the global structural analysis, a type of semirigid element which can effectively reflect the interaction of two braces in K joints is introduced and validated. The numerical example of a Warren lattice girder with different joint models shows the great effect of tubular joint rigidities on the internal forces, deformation and secondary stresses.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002246
|
oai_dc
|
Partially confined circular members subjected to axial compression: Analysis of concrete confined by steel ties
|
Partially confined circular members subjected to axial compression: Analysis of concrete confined by steel ties
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"R. Eid(Univ. of Sherbrooke); A. N. Dancygier(Technion-Israel Institute of Technology)"
] |
This paper presents a theoretical model for the behavior of partially confined axi-symmetric reinforced concrete members subjected to axial load. The analysis uses the theories of elasticity and plasticity to cover the full range of the concrete behavior. Analysis of the elastic range of the problem involves boundary conditions that are defined along a relatively simple geometry. However, extending the analysis into the plastic range involves difficulties that arise from the irregular geometry of the boundary between the plastic zone and the elastic zone, a boundary which is also changing as the axial load increases. The solution is derived by replacing the discrete steel ties with an equivalent tube of thickness teq and by analyzing the concrete cylinder, which is uniformly confined by the equivalent tube. The equivalency criterion initiates from a theoretical analysis of the problem in its elastic range where further finite element analysis shows that this criterion is valid also for the plastic range of the cylinder material. According to the proposed model, the efficiency of the lateral reinforcement can be evaluated by the equivalent thickness teq. Comparison with published test results of confined reinforced concrete stressstrain curves shows good agreement between the test and the analytical results.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115122
|
oai_dc
|
Detection of crack in L-shaped pipes filled with fluid based on transverse natural frequencies
|
Detection of crack in L-shaped pipes filled with fluid based on transverse natural frequencies
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. M. Murigendrappa(Indian Institute of Technology Bombay); S. K. Maiti(Indian Institute of Technology Bombay); H. R. Srirangarajan(Indian Institute of Technology Bombay)"
] |
The possibility of detecting a crack in L- shaped pipes filled with fluid based on measurement of transverse natural frequencies is examined. The problem is solved by representing the crack by a massless rotational spring, simulating the out-of-plane transverse vibration only without solving the coupled torsional vibration and using the transfer matrix method for solution of the governing equation. The theoretical solutions are verified by experiments. The cracks considered are external, circumferentially oriented and have straight front. Pipes made of aluminium and mild steel are tested with water as internal fluid. Crack size to pipe thickness ratio ranging from 0.20 to 0.57 and fluid (gauge) pressure in the range of 0 to 10 atmospheres are examined. The rotational spring stiffness is obtained by an inverse vibration analysis and deflection method. The details of the two methods are given. The results by the two methods are presented graphically and show good agreement. Crack locations are also determined by the inverse analysis. The maximum absolute error in the location is 13.80%. Experimentally determined variation of rotational spring stiffness with ratio of crack size to thickness is utilized to predict the crack sizes. The maximum absolute errors in prediction of crack size are 17.24% and 16.90% for aluminium and mild steel pipes respectively.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115167
|
oai_dc
|
Use of equivalent spring method for free vibration analyses of a rectangular plate carrying multiple three-degree-of-freedom spring-mass systems
|
Use of equivalent spring method for free vibration analyses of a rectangular plate carrying multiple three-degree-of-freedom spring-mass systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jia-Jang Wu(National Kaohsiung Marine Univ.)"
] |
Due to the complexity of mathematical expressions, the literature concerning the free vibration analysis of plates carrying multiple three-degree-of-freedom (dof) spring-mass systems is rare. In this paper, the three degrees of freedom (dof’s) for a spring-mass system refer to the translational motion of its lumped mass in the vertical (z)direction and the two pitching motions of its lumped mass about the two horizontal (x and y) axes. The basic concept of this paper is to replace each three-dof springmass system by a set of equivalent springs, so that the free vibration characteristics of a rectangular plate carrying any number of three-dof spring-mass systems can be obtained from those of the same plate supported by the same number of sets of equivalent springs. Since the three dof’s of the lumped mass for each three-dof spring-mass system are eliminated to yield a set of equivalent springs, the total dof of the entire vibrating system is not affected by the total number of the spring-mass systems attached to the rectangular plate. However, this is not true in the conventional finite element method (FEM), where the total dof of the entire vibrating system increases three if one more three-dof spring-mass system is attached to the rectangular plate. Hence, the computer storage memory required by using the presented equivalent spring method (ESM) is less than that required by the conventional FEM, and the more the total number of the three-dof spring-mass systems attached to the plate, the more the advantage of the ESM. In addition, since manufacturing a spring with the specified stiffness is much easier than making a three-dof spring-mass system with the specified spring constants and mass magnitude, the presented theory of replacing a three-dof spring-mass system by a set of equivalent springs will be also significant from this viewpoint.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002245
|
oai_dc
|
Earthquake response analysis of series reactor
|
Earthquake response analysis of series reactor
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Changqing Bai(Xi’an Jiaotong Univ.); Qingyu Xu(Xi’an Jiaotong Univ.); Hongyan Zhang(Xi’an Jiaotong Univ.)"
] |
A direct transfer substructure method is presented in this paper for analyzing the dynamic characteristics and the seismic random responses of a series reactor. This method combines the concept of FRF (frequency response function) and the transfer matrix algorithm with the substructure approach. The inner degrees of freedom of each substructure are eliminated in the process of reconstruction and the computation cost is reduced greatly. With the convenient solution procedure, the dynamic characteristics analysis of the structure is valid and efficient. Associated with the pseudo excitation algorithm, the direct transfer substructure method is applied to investigating the seismic random responses of the series reactor. The numerical results demonstrate that the presented method is efficient and practicable in engineering. Finally, a precise time integration method is employed in performing a time-history analysis on the series reactor under El Centro and Taft earthquake waves.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115166
|
oai_dc
|
Response of a rectangular plate-column system on a tensionless Winkler foundation subjected to static and dynamic loads
|
Response of a rectangular plate-column system on a tensionless Winkler foundation subjected to static and dynamic loads
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"K. Guler(Istanbul Technical Univ.); Z. Celep(Istanbul Technical Univ.)"
] |
The response of a plate-column system having five-degree-of-freedom supported by an elastic foundation and subjected to static lateral load, harmonic ground motion and earthquake motion is studied. Two Winkler foundation models are assumed: a conventional model which supports compression and tension and a tensionless model which supports compression only. The governing equations of the problem are obtained, solved numerically and the results are presented in figures to demonstrate the behavior of the system for various values of the system parameters comparatively for the conventional and the tensionless Winkler foundation models.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115080
|
oai_dc
|
Mechanical properties of thin-walled composite beams of generic open and closed sections
|
Mechanical properties of thin-walled composite beams of generic open and closed sections
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. Rajasekaran(PSG College of Technology)"
] |
A general analytical model for thin-walled composite beams with an arbitrary open/(or/and) closed cross section and arbitrary laminate stacking sequence i.e., symetric, anti-symmetric as well asun-symmetric with respect to the mid plane of the laminate, is developed in the first paper. Al themechanical properties, mechanical centre of gravity and mechanical shear centre of the cross section aredefined in the function of the geometry and the material properties of the section. A program “fungen”isotropic sections first and compared with the available results. The locations of mechanical centre ofgravity and mechanical shear centre are given with respect to the fibre angle variation in compositebeams. Variations of bending and torsional stiffness are shown to vary with respect to the fibre angleorientations.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115029
|
oai_dc
|
Generalized beam-column finite element on two-parameter elastic foundation
|
Generalized beam-column finite element on two-parameter elastic foundation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"K. Morfidis(Aristotle Univ. ofThessaloniki); I. E. Avramidis(Aristotle Univ. ofThessaloniki)"
] |
A new generalized Bernoulli/Timoshenko beam-column element on a two-parameter elasticfoundation is presented herein. This element is based on the exact solution of the diferential equationwhich describes the deflection of the axially loaded beam resting on a two-parameter elastic foundation,of equilibrium are formulated for the deformed configuration, so as to account for axial force effects.Apart from the stiffness matrix, load vectors for uniform load and non-uniform temperature variation arealso formulated. The efficiency and usefulness of the new element in reinforced concrete or steelstructures analysis is demonstrated by two examples.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002244
|
oai_dc
|
Probabilistic shear-lag analysis of structures using Systematic RSM
|
Probabilistic shear-lag analysis of structures using Systematic RSM
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jin Cheng(Tongji Univ.); C. S. Cai(Louisiana State Univ.); Ru-cheng Xiao(Tongji Univ.)"
] |
In the shear-lag analysis of structures deterministic procedure is insuficient to providecomplete information. Probabilistic analysis is a holistic approach for analyzing shear-lag effectsconsidering uncertainties in structural parameters. This paper proposes an efficient and accurate algorithmthe advantages of the response surface method (RSM), finite element method (FEM) and Monte Carlosimulation (MCS). Uncertainties in the structural parameters can be taken into account in this algorithm.The algorithm is verified using independently generated finite element data. The proposed algorithm isresults show that the proposed algorithm based on the central composite design is the most promising onein view of its accuracy and efficiency. Finally, a parametric study was conducted to investigate the effectof each of the random variables on the statistical moment of structural stress response.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115078
|
oai_dc
|
Structural identification and seismic performance of brick chimneys, Tokoname, Japan
|
Structural identification and seismic performance of brick chimneys, Tokoname, Japan
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"T. Aoki(Nagoya City Univ.); D. Sabia(Politecnico di Torino)"
] |
Dynamic and static analyses of existing structures are very important to obtain reliableinformation relating to actual structural properties. For this purpose a series of material test, dynamic testand static collapse test of the existing two brick chimneys, in Tokoname, are carried out. From thematerial tests, Young’s modulus and compressive strength of the brick used for these chimneys arebrick chimneys are discussed in this paper and composed with the results from FEA (Finite Elementanalysis). From the results of dynamic tests, the fundamental frequencies of Howa and Iwata brickchimneys are estimated to be about 2.69 Hz and 2.93 Hz, respectively. Their natural modes are identifiedexperimental tests, a numerical model has been prepared. According to the European code (Eurocode n. 8:“Design of structures for earthquake resistance”) non-linear static (Pushover) analysis of the two chimneysis carried out and they seem to be vulnerable to earthquakes with 0.25 to 0.35 g.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002079
|
oai_dc
|
Neural network based modeling of infilled steel frames
|
Neural network based modeling of infilled steel frames
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"K. Subramanian(Coimbatore Institute of Technology); K. M. Mini(Amrita Vishwa Vidyapeetham); S. Josephine Kelvina Florence(Coimbatore Institute of Technology)"
] |
A neural network based model is developed for the structural analysis of masonry infilledsteel frames, which can account for the non-linearities in the material properties and structural behaviour.Using the data available from the analytical methods, an ANN model with input parameters consisting ofacceptable in predicting the failure modes of infilled frames and coresponding failure load subject tolimitations in the training data and the predicted results are tested using the available experimental results.The study shows the importance of validating the ANN models in simulating structural behaviourresults and was found to perform well.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001001923
|
oai_dc
|
A function space approach to study rank deficiency and spurious modes in finite elements
|
A function space approach to study rank deficiency and spurious modes in finite elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"K. Sangeeta(C-MMACS); Somenath Mukherjee(National Aerospace Laboratories); Gangan Prathap(C-MMACS)"
] |
Finite elements based on isoparametric formulation are known to suffer spurious stiffnesscontinuity requirements are enforced. This occurs frequently when the physics of the problem requiresmultiple strain components to be defined. This kind of error, commonly known as locking, can bethe full integration that is mathematically prescribed. However, the reduced integration technique itself canhave a further drawback - rank deficiency, which physically implies that spurious energy modes (e.g.,matrix is generally detected by means of an eigenvalue test. In this paper we show that a knowledge ofthe dimension of the solution space spanned by the column vectors of the strain-displacement matrix canapriori, without having to complete the element stiffness matrix formulation and then test for zero eigenvalues.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001115079
|
oai_dc
|
A hybrid 8-node hexahedral element for static and free vibration analysis
|
A hybrid 8-node hexahedral element for static and free vibration analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kutlu Darilmaz(Istanbul Technical Univ.)"
] |
An 8 node assumed stress hexahedral element with rotational degrees of freedom is proposedfor static and free vibration analyses. The element formulation is based directly on an 8-node element.This direct formulation requires fewer computations than a similar element that is derived from an internal20-node element in which the midside degrees of freedom are eliminated by expressing them in terms ofprinciple. Numerical examples are presented to show the validity and efficiency of the present element forstatic and free vibration analysis.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114936
|
oai_dc
|
A Moving Least Squares weighting function for the Element-free Galerkin Method which almost fulfills essential boundary conditions
|
A Moving Least Squares weighting function for the Element-free Galerkin Method which almost fulfills essential boundary conditions
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Thomas Most(Bauhaus-Univ.); Christian Bucher(Bauhaus-Univ.)"
] |
The Element-free Galerkin Method has become a very popular tool for the simulation ofmechanical problems with moving boundaries. The internally applied Moving Least Squares interpolationuses in general Gaussian or cubic weighting functions and has compact support. Due to the approximativewhich causes additional numerical effort for the application of the boundary conditions. In this paper anew weighting function is presented, which was designed for meshless shape functions to fulfill theseessential conditions with very high accuracy without any additional effort. Furthermore this interpolationgives much more stable results for varying size of the influence radius and for strongly distorted nodal arrangements than existing weighting function types.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114890
|
oai_dc
|
Analysis of a force reconstruction problem
|
Analysis of a force reconstruction problem
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"E. Jacquelin(UniversitéClaude Bernard Lyon 1); A. Bennani(UniversitéClaude Bernard Lyon 2); M. Massenzio(UniversitéClaude Bernard Lyon 3)"
] |
This article deals with the reconstruction of an impact force. This requires to takemeasurements from the impacted structures and then to deconvolve those signals from the impulseresponse function. More precisely, the purpose of the work described here is to analyse the method ofproblem depends on the location of the measurement points: it is possible or not to reconstruct the forceof impact in function of the location of this point. Then, the role of the antiresonances is linked up withthis problem. The singular value decomposition is used to understand these dificulties. Numericalpredictions are compared and validated with experiments.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002076
|
oai_dc
|
An independent distortional analysis method of thin-walled multicell box girders
|
An independent distortional analysis method of thin-walled multicell box girders
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Nam-Hoi Park(Korea Univ.); 강영종(Korea Univ.); Hee-Joong Kim(Keimyung Univ.)"
] |
When a thin-walled multicell box girder is subjected to an eccentric load, the distortion becomes an important global response in addition to flexure and torsion. The three global responsesappear in a combined form when a conventional shell element is used thus it is not an easy task toexamine the three global responses separately. This study is to propose an analysis method usingdecomposition method which was designed for a single-cell box girder by Nakai and Yo is expandedherein to multicell box girders. The eccentric load is decomposed in the expanded method into flexural,torsional, and multimode distortional forces by using the force equilibrium. From the force decomposition,distortional response which is of primary concern herein can be obtained separately. It is shown from aseries of extensive comparative studies using three box girder bridge models that the expanded methodproduces accurate decomposed results. Noting that the separate consideration of individual global responseexpanded method is extremely useful for practicing engineers.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114980
|
oai_dc
|
Seismic shear strengthening of R/C beams and columns with expanded steel meshes
|
Seismic shear strengthening of R/C beams and columns with expanded steel meshes
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Reza Morshed(Yazd Univ.); Mohammad Taghi Kazemi(Sharif Univ. of Technology)"
] |
This paper presents results of an experimental study to evaluate a new retrofit technique forstrengthening shear deficient short concrete beams and columns. In this technique a mortar jacketincluding eight retrofitted ones, were tested. Six specimens were tested under a constant compressive axialforce of 15% of column axial load capacity based on original concrete gross section, Ag, and the concretecompresive strength, fc'. Main variables were the spacing of ties in original specimens and the volumefraction of expanded metal in jackets. Original specimens failed before reaching their nominal calculatedflexural strength, Mn, and had very poor ductility. Strengthened specimens reached their nominal flexuralstrength and had a ductility capacity factor of up to 8 for the beams and up to 5.5 for the columns. Basedshear deficient concrete members.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114981
|
oai_dc
|
On the natural frequencies and mode shapes of a uniform multi-span beam carrying multiple point masses
|
On the natural frequencies and mode shapes of a uniform multi-span beam carrying multiple point masses
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hsien-Yuan Lin(National Sun Yat-Sen Univ.); Ying-Chien Tsai(Cheng Shiu Univ.)"
] |
Multi-span beams carrying multiple point masses are widely used in engineering applications, but the literature for free vibration analysis of such structural systems is much les than that of single-span beams. The complexity of analytical expressions should be one of the main reasons for the lastphenomenon. The purpose of this paper is to utilize the numerical assembly method (NAM) to determinemasses. First, the coefficient matrices for an intermediate pinned support, an intermediate point mass, left-end support and right-end support of a uniform beam are derived. Next, the overall coefficient matrix forthe whole structural system is obtained using the numerical assembly technique of the finite elementdetermined by equating the determinant of the last overall coefficient matrix to zero and substituting thecoresponding values of integration constants into the related eigenfunctions respectively. The effects ofin-span pinned supports and point mases on the fre vibration characteristics of the beam are also studied.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114934
|
oai_dc
|
A response spectrum method for seismic response analysis of structures under multi-support excitations
|
A response spectrum method for seismic response analysis of structures under multi-support excitations
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jian-hua Li(Univ. of Missouri-Columbia); Jie Li(Tongji Univ.)"
] |
Based on the random vibration theory, a response spectrum method is developed for seismicdeveloped. Various response quantities, including the mean and variance of the peak response, theresponse mean frequency, are obtained from proposed combination rules in terms of the mean responsespectrum. This method makes it posible to apply the response spectrum to the seismic reliability analysisrequired to compute the spectral parameters and correlation coefficients in above combination rules, thispaper further offers simplified procedures for their computation, which enhance dramatically thecomputational efficiency of the sugested method. The proposed procedure is demonstrated for townumerical examples: (1) two-span continuous beam; (2) two-tower cabled-stayed bridge by using Montemotions, which can take into account both mean and variation properties of response spectrum. Computedresults based on the response spectrum method are in good agreement with Monte Carlo simulationresults. And compared with the MSRS method, a wel-developed multi-support response spectrum method,the proposed method has an incomparable computational efficiency.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114982
|
oai_dc
|
Moving force identification from bridge dynamic responses
|
Moving force identification from bridge dynamic responses
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ling Yu(Changjiang River Scientific Research Institute); Tommy H.T. Chan(The Hong Kong Polytechnic Univ.)"
] |
A big progress has been made for moving force identification from bridge dynamic responsesin recent years. Current knowledge and the potentials on moving force identification methods areexperimental verification in laboratory and its application in field.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114935
|
oai_dc
|
Determining the effective width of composite beams with precast hollowcore slabs
|
Determining the effective width of composite beams with precast hollowcore slabs
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ehab El-Lobody(Tanta Univ.); Dennis Lam(Univ. of Leeds)"
] |
This paper evaluates the effective width of composite steel beams with precast hollowcoreslabs numerically using the finite element method. A parametric study, carried out on 27 beams withslab is predicted for both the elastic and plastic ranges. 8-node three-dimensional solid elements are usedto model the composite beam components. The material non-linearity of all the components is taken intoconsideration. The non-linear load-slip characteristics of the headed shear stud connectors are included inthe analysis. The moment-deflection behaviour of the composite beams, the ultimate moment capacity andusing the present FE analysis was compared with the results calculated using the rigid – plastic method.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002074
|
oai_dc
|
The buckling of rectangular plates with opening using a polynomial method
|
The buckling of rectangular plates with opening using a polynomial method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"T. Muhammad(The Univ. of Western Ontario); A. V. Singh(The Univ. of Western Ontario)"
] |
In this paper an energy method is presented for the linear buckling analysis of first ordershear deformable plates. The displacement fields are defined in terms of the shape functions, whichcorespond to a set of predefined points and are composed of significantly high order polynomials. Thebilinear shape functions. In order to evaluate the method, fully clamped and simply supported rectangularplates subjected to uniform uniaxial compressive loading on two opposite edges of the plate areinvestigated thoroughly and the results are compared with the exact solution given in the monograph ofTimoshenko and Gere (1961). The method is extended to the analysis of perforated plates, wherein thesuperimposed to the stiffness of the ful plate. Numerical results are then favorably compared with thoseobtained by finite element methods. Other cases such as; rectangular plates with eccentrically locatedopenings of different shapes are studied and reported in this paper with regards to the effect of aspectratio, hole size, and hole position on the buckling. For a square plate with a large circular opening at thepercent higher than the one from the FEM.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002448
|
oai_dc
|
Significance of rigorous fluid-foundation interaction in dynamic analysis of concrete gravity dams
|
Significance of rigorous fluid-foundation interaction in dynamic analysis of concrete gravity dams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Vahid Lotfi(Amirkabir Univ.)"
] |
Dynamic analysis of dam-reservoir-foundation system is usually carried out by employing asimplified and approximate one-dimensional model to account for fluid-foundation interaction. Theapproximation introduced on this basis is examined thoroughly in this paper by comparing the methodwith the rigorous approach. It is concluded that the errors due to approximate method could be very significant both for horizontal and vertical ground motions.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114887
|
oai_dc
|
Natural vibration characteristics of a clamped circular plate in contact with fluid
|
Natural vibration characteristics of a clamped circular plate in contact with fluid
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Myung Jo Jhung(Korea Institute of Nuclear Safety); Young Hwan Choi(Korea Institute of Nuclear Safety); Hho Jung Kim(Korea Institute of Nuclear Safety); Kyeong Hoon Jeong(Korea Atomic Energy Research Institute)"
] |
This study deals with the fre vibration of a circular plate in contact with a fluid; submergedexpansion and Rayleigh-Ritz method is suggested. The proposed method is verified by the finite elementanalysis using commercial program with a god accuracy. The normalized natural frequencies are obtainedin order to estimate the relative added mas effect of fluid on each vibration mode of the plate. Also, theeffect on the vibration characteristics.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114889
|
oai_dc
|
Experimental investigation on the shear capacity of RC dapped end beams and design recommendations
|
Experimental investigation on the shear capacity of RC dapped end beams and design recommendations
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Quanfeng Wang(Huaqiao Univ.); Zixiong Guo(Huaqiao Univ.); Pierre C.J. Hoogenboom(Delft Univ. of Technology)"
] |
In this paper, the shear resistance behaviour of reinforced concrete (RC) dapped end beams istype and effective range to provided the stirrups and the bent form of the longitudinal reinforcement. Thefailure behaviour of dapped end beams is presented and some conclusions are given. Inclined stirrups andlongitudinal bent reinforcement have more influence on the shear capacity than vertical stirrups. Additionally, the shear mechanism of dapped end beams is analysed. Relatively simple semi-empiricalpredicted results are in close agrement with the experimental ones. Finally, some design suggestions forthe ultimate shear strength of dapped end beams are presented.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002447
|
oai_dc
|
A general convergence condition of the Newton-Raphson algorithm applied to compressible hyperelasticity
|
A general convergence condition of the Newton-Raphson algorithm applied to compressible hyperelasticity
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Francois Peyraut(Universitéde Technologie de Belfort-Montbéliard); Zhi-Qiang Feng(Universitéd’Evry-Val d’Essonne); Nadia Labed(Universitéde Technologie de Belfort-Montbéliard)"
] |
This paper presents the implementation of the Blatz-Ko hyperelastic compressible model in afinite element program to deal with large deformation problems. We show analytically and numericallyproperties and applied loads. We also show that this dependence is related to the orientation preservationprinciple. So we propose a convergence criteria based on the sign of eigenvalues of the deformation gradient matrix.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001002075
|
oai_dc
|
Application of artificial neural networks to a double receding contact problem with a rigid stamp
|
Application of artificial neural networks to a double receding contact problem with a rigid stamp
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Erdogan Cakiroglu(Karadeniz Technical Univ.); Isa Comez(Karadeniz Technical Univ.); Ragip Erdol(Karadeniz Technical Univ.)"
] |
This paper presents the posibilities of adapting artificial neural networks (ANNs) to predictthe dimensionless parameters related to the maximum contact pressures of an elasticity problem. Theplane symetric double receding contact problem for a rigid stamp and two elastic strips having diferentof a rigid stamp and the lower elastic strip is bonded to a rigid support. The problem is solved under theassumptions that the contact between two elastic strips also between the rigid stamp and the uper elasticstrip are frictionless, the effect of gravity force is neglected and only compressive normal tractions can betransmitted through the interfaces. A three layered AN with backpropagation (BP) algorithm is utilizedtesting patterns are formed by using the theory of elasticity with integral transformation technique. ANpredictions and theoretical solutions are compared and seen that AN predictions are quite close to thetheoretical solutions. It is demonstrated that ANs is a suitable numerical tool and if properly used, canreduce time consumed.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001114888
|
oai_dc
|
Robustness analysis of vibration control in structures with uncertain parameters using interval method
|
Robustness analysis of vibration control in structures with uncertain parameters using interval method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Su Huan Chen(Jilin Univ.); Min Song(Jilin Univ.); Yu Dong Chen(Jilin Univ.)"
] |
Variations in system parameters due to uncertainties may result in system performancedeterioration. Uncertainties in modeling of structures are often considered to ensure that control system isrobust with respect to response errors. Hence, the uncertain concept plays an important role in vibrationcontrol systems with uncertain parameters. The vibration control problem of an uncertain system isapproximated by a deterministic one. The uncertain parameters are described by interval variables. Theuncertain state matrix is constructed directly using system physical parameters and avoided to use boundsin Euclidean norm. The feedback gain matrix is determined based on the deterministic systems, and theneigenvalues of the close-loop system with uncertain parameters is presented. The lower bounds ofeigenvalues can be used to estimate the robustness of the stability the controlled system with uncertainparameters. Two numerical examples are given to illustrate the applications of the present approach.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000906984
|
oai_dc
|
Seismic resistance and mechanical behaviour of exterior beam-column joints with crossed inclined bars
|
Seismic resistance and mechanical behaviour of exterior beam-column joints with crossed inclined bars
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"P.G.Bakir(Istanbul Technical University)"
] |
Atempts at improving beam-column joint performance has resulted in non-conventional waysof reinforcement such as the use of the crossed inclined bars in the joint area. Despite the wideacumulation of test data, the influence of the crosed inclined bars on the shear strength of the cyclicalyloaded exterior beam-column joints has not yet been quantified and incorporated into coderecomendations. In this study, the investigation of joints has been pursued on two diferent fronts. In thefirst approach, the parameters that influence the behaviour of the cyclicaly loaded beam-column joints areinvestigated. Several parametric studies are carried out to explore the shear resisting mechanisms ofcyclicaly loaded beam-column joints using an experimental database consisting of a large number of jointtests. In the second approach, the mechanical behaviour of joints is investigated and the equations for theprincipal tensile strain and the average shear stres are derived from joint mechanics. It is apparent thatthe predictions of these two aproaches agre wel with each other. A design equation that predicts theshear strength of the cyclicaly loaded exterior beam-column joints is proposed. The design equationproposed has three major diferences from the previously suggested design equations. First, the influenceof the bond conditions on the joint shear strength is considered. Second, the equation takes the influenceof the shear transfer mechanisms of the crosed inclined bars into account and, third, the equation isapplicable on joints with high concrete cylinder strength. The proposed equation is compared with thepredictions of the other design equations. It is apparent that the proposed design equation predicts thejoint shear strength acurately and is an improvement on the existing code recomendations.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001003610
|
oai_dc
|
Energy Dissipation response of brick masonry under cyclic compressive loading
|
Energy Dissipation response of brick masonry under cyclic compressive loading
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"R.Senthivel(Indian Institute of Technology); S.N.Sinha(Indian Institute of Technology)"
] |
Scaled brick masonry panels were tested under cyclic unialxial compresion loading toevaluate its deformation characteristics. An envelope stres - strain curves, a comon point curves andstability point curves were obtained for various cyclic test conditions. Loops of the stres-strain hysteresiswere used to determine the energy disipation for each cycle. Empirical expresions were proposed for therelations betwen energy disipation and envelope and residual strains. These relations indicated that thedecay of masonry strength starts at about two-third of peak stres.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000906982
|
oai_dc
|
Variable-node non-conforming membrane elements
|
Variable-node non-conforming membrane elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Chang-KoonChoi(University of Californa); Tae-YeolLee(University of Californa)"
] |
Non-conforming membrane elements which have variable number of mid-side nodes withdriling degrees of fredom and which is designated as NMDx have been presented in this paper. Thenon-conforming elements with variable number of mid-side nodes can be efficiently used in the localmesh refinement for the in-plane structures. To guarante the developed elements always pas the patchtest, the direct modification method is incorporated into the element formulation. Detailed numerical testsin this study show the validity of the variable node NC elements developed in this study and a wideapplicability of these elements to practical problems.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197895
|
oai_dc
|
Study on a seismic slit shear wall with cyclic experiment and macro-model analysis
|
Study on a seismic slit shear wall with cyclic experiment and macro-model analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"HuanjunJiang(Tongji University); XilinLu(Tongji University); A.K.H.Kwan(University of Hong Kong); Y.K.Cheung(University of Hong Kong)"
] |
The concept of the seismic slit shear wall was proposed in the early 1990s. A series ofexperimental and theoretic studies on the wall with reinforced concrete short connecting beams cast in theslit were carried out. In this paper another type of slit shear wall is studied. It is one with vertical slit purposely cast within the wall, and the rubber belt penetrated by a part of web shear reinforcement as
seismic energy-dissipation device is filled in the slit. Firstly, an experiment under cyclic loading was
carried out on two shear wall models, one slit and the other solid. The failure mechanism and energydissipation
capacity are compared between the two different models, which testifies the seismic
performance of the slit wall improved significantly. Secondly, for engineering practice purpose, a
macroscopic analytical model is developed to predict the nonlinear behavior of the slit shear wall under
cyclic loading. The mechanical properties of each constituent elements of this model are based on the
actual behavior of the materials. Furthermore, the effects of both the axial force and bending moment on
the shear behavior are taken into account with the aid of the modified compression-field theory. The
numerical results are verified to be in close agreement with the experimental measurements.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000912077
|
oai_dc
|
A new ALE formulation for sloshing analysis
|
A new ALE formulation for sloshing analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"N.Aquelet(Universite de Lille); M.Souli(Universite de Lille); J.Gabrys(Boeing Company); L.Olovson(Livermore Software Technology Corporation)"
] |
Arbitrary Lagrangian Eulerian finite element methods gain interest for the capability tocontrol mesh geometry independently from material geometry, the ALE methods are used to create a newundistorted mesh for the fluid domain. In this paper we use the ALE technique to solve fuel sloshproblem. Fuel slosh is an important design consideration not only for the fuel tank, but also for thestructure supporting the fuel tank. Fuel slosh can be generated by many ways: abrupt changes inaceleration (braking), as wel as abrupt changes in direction (highway exit-ramp). Repetitive motion canalso be involved if a sloshing resonance is generated. These sloshing events can in turn affect theoverall performance of the parent structure. A finite element analysis method has ben developed toanalyze this complex event. A new ALE formulation for the fluid mesh has been developed to keep thefluid mesh integrity during the motion of the tank. This paper explains the analysis capabilities on atechnical level. Following the explanation, the analysis capabilities are validated against theoretical usingpotential flow for calculating fuel slosh frequency.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000912079
|
oai_dc
|
Sequential pattern load modeling and warning-system plan in modular falsework
|
Sequential pattern load modeling and warning-system plan in modular falsework
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jui-LinPeng(Yunlin University of Science and Technology); Cheng-LungWu(Chaoyang University of Technology); Siu-LaiChan(Hong Kong Polytechnic University)"
] |
This paper investigates the structural behavior of modular falsework system under sequentialpatern loads. Based on the studies of 25 construction sites, the patern load sequence modeling is definedas models R (rectangle), L and U. The study focuses on the system critical loads, regions of largestreaction forces, discrepancy betwen the patern load and the uniform load, and the warning-system plan.The analysis results show that the critical loads of modular falsework systems with sequential paternloads are very close to those with the uniform load used in design. The regions of largest reaction forcesare smaler than those calculated by the uniform load. However, the regions of largest reaction forces ofthree models under sequential patern loads can be considered as the crucial positions of warning-systembased on the measured index of loading. The positions of the sensors for the warning-system for thesethree diferent models are not identical.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000906986
|
oai_dc
|
Bond strength of reinforcement in splices in beams
|
Bond strength of reinforcement in splices in beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"KazimTruk(Trkya University); M.SukruYildirim(Trkya University)"
] |
The primary aim of this study was to investigate the bond strength betwen reinforcementand concrete. Large sized nine beams, which were produced from concrete with approximately fc'=30MPa, were tested. Each beam was designed to include two bars in tension, spliced at the center of thespan. The splice length was selected so that bars would fail in bond, spliting the concrete cover in thesplice region, before reaching the yield point. In al experiments, the variable used was the reinforcing bardiameter. In the experiments, beam specimens were loaded in positive bending with the splice in aconstant moment region. In consequence, as the bar diameter increased, bond strength and ductilityreduced but, however, the stiffneses of the beams (resistance to deflection) increased. Morever, aempirical equation was obtained to calculate the bond strength of reinforcement and this equation wascompared with Orangun et al. (1977) and Esfahani and Rangan (1998). There was a good agreementbetwen the values computed from the predictive equation and those computed from equations ofOrangun et al. (1977) and Esfahani and Rangan (1998).
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000912074
|
oai_dc
|
Modelling of timber joints made with steel dowels and locally reinforced by DVW discs
|
Modelling of timber joints made with steel dowels and locally reinforced by DVW discs
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"ZhongweiGuan(University of Brighton); PeterRodd(University of Brighton)"
] |
Local reinforcement in dowel type timber joints is esential to improve ductility, to increaseload carrying capacity and to reduce the risk of britle failure, especialy in the case of using solid dowel.In many types of reinforcing materials available today, DVW (densified veneer wood) has beendemonstrated to be the most advantages in terms of compatibility, embeding performance and ductility.Preliminary studies show that using appropriately sized DVW discs bonded into the timber interfaces maybe an effective way to reinforce the conection. In this paper, non-linear 3-dimensional finite elementmodels, incorporating orthotropic and non-linear material behaviour, have been developed to simulatestructural performance of the timber joints localy reinforced by DVW discs. Diferent contact algorithmswere applied to simulate contact conditions in the joints. The models were validated by the correspondingstructural tests. Correlation betwen the experimental results and the finite element simulations isreasonably good. Using validated finite element models, parametric studies were undertaken to investigateefects of the DVW disc sizes and the end distances on shear stresses and normal stresses in a possiblefailure plane in the joint.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000911988
|
oai_dc
|
Development of finite element model using incremental endochronic theory for temperature sensitive material
|
Development of finite element model using incremental endochronic theory for temperature sensitive material
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"TienfuanKerh(Natinal Pingtung University fo Science and Technology); Y.C.Lin(Natinal Pingtung University fo Science and Technology)"
] |
A novel finite element model based on the incremental endochronic theory with the effect oftemperature was developed in this study to explore the deformed behaviors of a flexible pavementmaterial. Three mesh systems and two loading steps were used in the calculation process for a specimenof three-dimensional circular cylinder. Computational results in the case of an uni-axial compression testfor temperatures at 20oC and at 40oC were compared with available experimental measurements to verifythe ability of developing numerical scheme. The isotropic response and the deviatoric response due to thethermal effect were presented from deformations in diferent profiles and displacement plots for the entirespecimen. The characteristics of changing asphalt concrete material under a specified loading conditionmight be seen clearly from the numerical results, and might provide an useful information in the field ofroad engineering.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197892
|
oai_dc
|
Characteristics of solutions in softening plasticity and path criterion
|
Characteristics of solutions in softening plasticity and path criterion
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"G.Chen(University of Southern Queensland); G.Baker(University of Southern Queensland)"
] |
Characteristics of solutions of softening plasticity are discussed in this article. The localizedand non-localized solutions are obtained for a three-bar truss and their stability is evaluated with the aidof the second-order work. Beyond the bifurcation point, the single stable loading path splits into severalpost-bifurcation paths and the second-order work exhibits several competing minima. Among the multiplepost-bifurcation equilibrium states, the localized solutions correspond to the minimum points of thesecond-order work, while the non-localized solutions correspond to the saddles and local maximum points.To determine the real post-bifurcation path, it is proposed that the structure should folow the pathcorresponding to the absolute minimum point of the second-order work. The proposal is further provedequivalent to Bazants path criterion derived on a thermodynamics basis.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197893
|
oai_dc
|
Effect of boundary conditions on the stability of beams under conservative and non-conservative forces
|
Effect of boundary conditions on the stability of beams under conservative and non-conservative forces
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"AlessandroMarzani(University of Calabria); ErasmoViola(University of Bologna)"
] |
This paper, which is an extension of a previous work by Viola et al. (2002), deals with thedynamic stability of beams under a triangularly distributed sub-tangential forces when the effect of anelastically restrained end is taken into account. The sub-tangential forces can be realised by a combinationof axial and tangential follower forces, that are conservative and non-conservative forces, respectively. Thestudied beams become unstable in the form of either flutter or divergence, depending on the degree ofnon-conservativeness of the distributed sub-tangential forces and the stiffness of the elastically restrainedend. A non-conservative parameter a is introduced to provide all posible combinations of these forces.Problems of this kind are usually, at least in the first approximation, reduced to the analysis of beamsaccording to the Bernoulli-Euler theory if shear deformability and rotational inertia are negligible. Theequation governing the system may be derived from the extended form of Hamiltons principle. Thestability maps will be obtained from the eigenvalue analysis in order to define the divergence and flutterdomain. The passage from divergence to flutter is associated with a noticeable lowering of the criticalload. A number of particular cases can be immediately recovered.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000911989
|
oai_dc
|
The exact soutions for the natural frequencies and mode shapes of non-uniform beams carrying multiple various concentrated elements
|
The exact soutions for the natural frequencies and mode shapes of non-uniform beams carrying multiple various concentrated elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Der-WeiChen(National Defense University)"
] |
From the equation of motion of a arenon-uniform beam (without any concentratedelements), an eigenfunction in term of four unknown integration constants can be obtained. When the lasteigenfunction is substituted into the three compatible equations, one force-equilibrium equation, onegoverning equation for each attaching point of the concentrated element, and the boundary equations forthe two ends of the beam, a matrix equation of the form [B]{C} = {0} is obtained. The solution of(where. .. denotes a determinant) will give the exactnatural frequencies of the onstrainedbeam (carrying any number of point mases or/and concentrated springs) and the substitution of eachcorresponding values of {C} into the associated eigenfunction for each attaching point will determine thecorresponding mode shapes. Since the order of [B] is 4n + 4, where n is the total number of point masesand concentrated springs, the xplicitmathematical expression for the existing approach becomeslengthily intractable if n > 2. The umerical assembly methodNAM) introduced in this paper aims atimproving the last drawback of the existing approach. The xactsolutions in this paper refer to thenumerical results obtained from the ontinuum models for the classical analytical approaches rather thanfrom the iscretizedones for the conventional finite element methods.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197891
|
oai_dc
|
Analytical model for hybrid RC frame-steel wall systems
|
Analytical model for hybrid RC frame-steel wall systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y.L.Mo(University of Houston); S.F.Perng(National Kaohsiung University of Applied Sciences)"
] |
Reinforced concrete buildings with shearwalls are very efficient to resist earthquakedisturbances. In general, reinforced concrete frames are governed by flexure and shearwalls are governedby shear. If a structure included both frames and shearwalls, it is generally governed by shearwalls.However, the ductility of ordinary reinforced concrete is very limited. To improve the ductility, a series oftests on framed shearwalls made of corrugated steel was performed previously and the experimentalresults were compared with ordinary reinforced concrete frames and shearwalls. It was found that ductilityof framed shearwalls could be greatly improved if the thickness of the corrugated steel wall is appropriateto the surounding reinforced concrete frame. In this paper, an analytical model is developed to predict thehorizontal load-displacement relationship of hybrid reinforced concrete frame-steel wall systems accordingto the analogy of truss models. This analytical model is based on equilibrium and compatibility conditionsas well as constitutive laws of corrugated steel. The analytical predictions are compared with the resultsof tests reported in the previous paper. It is found that proposed analytical model can predict the testresults with acceptable accuracy.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001003273
|
oai_dc
|
More reliabel responses for time integration analyses
|
More reliabel responses for time integration analyses
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A.Soroushian(University of Tehran); J.Farjoodi(University of Tehran)"
] |
One of the most versatile approaches for analyzing the dynamic behavior of structuralsystems is direct time integration of semi-discrete equations of motion. However responses computed bytime integration are generally inexact and hence the corresponding erors would rather be studied inadvance. In spite of the various error estimation formulations that exist in the literature, it is acceptedpractice to repeat the analyses with smaller time steps, followed by a comparison between the results. Inthis paper, after a review of this simple method and disregarding the round-of errors, a more efficient,reliable and yet simple method for estimating errors and enhancing the accuracy is proposed. The mainobjectives of this research are more realistic error estimation based on the concept of convergence,approximately controlling the reliability by comparing the actual rate of convergence with the integrationmethods order of accuracy, and enhancement of reliability by applying Richardsons extrapolation.Starting from the errors at specific time instants, the study is then generalized to cases in which the errorsshould be estimated and decreased at specific events e.g. peak responses. Numerical study illustrates theefficacy of the proposed method.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000911990
|
oai_dc
|
Inserting the mass proportional damping (MPD) system in a concrete shear-type structure
|
Inserting the mass proportional damping (MPD) system in a concrete shear-type structure
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"StefanoSilvestri(University of Bologna); TomasoTrombetti.ClaudioCeccoli(University of Bologna)"
] |
This paper presents an illustrative example of the advantages offered by inserting addedviscous dampers into shear-type structures in accordance with a special scheme based upon the massproportional damping (MPD) component of the Rayleigh viscous damping matrix. In previous worksdeveloped by the authors, it has been widely shown that, within the class of Rayleigh damped systemsand under the qual total costconstraint, the MPD system provides best overall performance both interms of minimising top-storey mean square response to a white noise stochastic input and maximisingthe weighted average of modal damping ratios. A numerical verification of the advantages offered by theapplication of MPD systems to a realistic structure is presented herein with reference to a 4-storeyreinforced-concrete frame. The dynamic response of the frame subjected to both stochastic inputs andseveral recorded earthquake ground motions is here analysed in detail. The results confirm the gooddissipative properties of MPD systems and indicate that this is achieved at the expense of relatively smaldamping forces.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000911913
|
oai_dc
|
Analytical and experimental study on the behavior fo elastically supported reinforced concrete decks
|
Analytical and experimental study on the behavior fo elastically supported reinforced concrete decks
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Nam-HoiPark(Korea University); Young-JongKang(Korea University); Jin-YuChoi(Korea Railroad Research Institute); Nam-HyoungLim(Korea University)"
] |
Current design specifications prescribe that the upper and lower reinforcement mat isrequired in the same amount to resist negative and positive moment in bridge decks. This design conceptis primarily based on the unrealistic asumption that the girder plays a role of rigid support against deckdeflection. In reality, however, girders are flexible and the deflection of girders affect the behavior of deckslabs. In the present study, an analytical method was developed to take the effect of the girder flexibilityon the deck behavior into account. The method was formulated based on the slope-deflection equations ofplates and harmonic analysis. Unlike the conventional finite element analysis, the input and outputschemes are simple and convenient. The validity of the presented study was verified by a series ofcomparative studies with finite element analyses and experimental tests. It was shown from the analysesthat the negative transverse moments of decks were significantly reduced in many cases when the girderflexibility were appropriately taken into consideration whereas the positive moments tend to increase. Thisposes a strong need to improve the conventional design concept of decks on rigid girders to those onflexible girders.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000911916
|
oai_dc
|
Buckling and vibration analysis of stiffened plate subjected to in - plane concentrated load
|
Buckling and vibration analysis of stiffened plate subjected to in - plane concentrated load
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A.K.L.Srivastava(Aerospace Engineering Department); P.K.Datta(Aerospace Engineering Department); A.H.Sheikh(Department of Ocean Engineering)"
] |
The buckling and vibration characteristics of stiffened plates subjected to in-planeconcentrated edge loading are studied using finite element method. The problem involves the effects ofnon-uniform stres distribution over the plate. Buckling loads and vibration frequencies are determined fordiferent plate aspect ratios, boundary edge conditions and load positions. The non-uniform stresses mayalso be caused due to the supports on the edges. The analysis presented determines the initial stresses alover the region considering the pre-buckling stres state for diferent kinds of loading and edgeconditions. In the structural modeling, the plate and the stiffeners are treated as separate elements wherethe compatibility between these two types of elements is maintained. The vibration characteristics arediscussed and the results are compared with those available in the literature and some interesting newresults are obtained.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000911917
|
oai_dc
|
The mixed finite element for quasi - static and dynamic analysis of viscoelastic circular beams
|
The mixed finite element for quasi - static and dynamic analysis of viscoelastic circular beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"FethiKadioglu(Istanbul Technical University); A.YalcinAkoz(Istanbul Technical University)"
] |
The quasi-static and dynamic responses of a linear viscoelastic circular beam on Winklerfoundation are studied numerically by using the mixed finite element method in transformed Laplace-Carson space. This element VCR12 has 12 independent variables. The solution is obtained in transformedspace and Schapery, Dubner, Durbin and Maximum Degree of Precision (MDOP) transform techniquesare employed for numerical inversion. The performance of the method is presented by several quasi-staticand dynamic example problems.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000911914
|
oai_dc
|
A study of the nonlinear dynamic instability of hybrid cable dome structures
|
A study of the nonlinear dynamic instability of hybrid cable dome structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"김승덕(세명대학교); Hyung-SeokKim(Kyungpook National University); Moon-MyungKang(Kyungpook National University)"
] |
Many papers which deal with the dynamic instability of shell-like structures under the STEPload have been published. But, there have been few papers related to the dynamic instability of hybridcable domes. In this study, the dynamic instability of hybrid cable domes considering geometricnonlinearity is investigated by a numerical method. The characteristic structural behaviour of a cabledome shows a strong nonlinearity, so we determine the shape of a cable dome by applying initial stressand examine the indirect buckling mechanism under dynamic external forces. The dynamic critical loadsare determined by the numerical integration of the nonlinear equation of motion, and the indirect bucklingis examined by using the phase plane to investigate the occurrence of chaos.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART000911915
|
oai_dc
|
Stochastic optimal control of coupled structures
|
Stochastic optimal control of coupled structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Z.G.Ying(Zhejiang University); Y.Q.Ni(Hong Kong Polytechnic University); J.M.Ko(Hong Kong Polytechnic University)"
] |
The stochastic optimal nonlinear control of coupled adjacent building structures is studiedbased on the stochastic dynamical programming principle and the stochastic averaging method. Thecoupled structures with control devices under random seismic excitation are first condensed to form areduced-order structural model for the control analysis. The stochastic averaging method is applied to thereduced model to yield stochastic diferential equations for structural modal energies as controlleddifusion processes. Then a dynamical programming equation for the energy processes is established basedon the stochastic dynamical programing principle, and solved to determine the optimal nonlinear controllaw. The seismic response mitigation of the coupled structures is achieved through the structural energycontrol and the dimension of the optimal control problem is reduced. The seismic excitation spectrum istaken into account according to the stochastic dynamical programming principle. Finally, the nonlinearcontroled structural response is predicted by using the stochastic averaging method and compared withthe uncontrolled structural response to evaluate the control efficacy. Numerical results are given todemonstrate the response mitigation capabilities of the proposed stochastic optimal control method forcoupled adjacent building structures.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001197886
|
oai_dc
|
Constitutive law for wedge-tendon gripping interface in anchorage device - numerical modeling and parameters identification
|
Constitutive law for wedge-tendon gripping interface in anchorage device - numerical modeling and parameters identification
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"D.Marceau(Universite du Quebec); M.Fafard(Laval University); J.Bastien(Laval University)"
] |
Mechanical anchorage devices are generally tested in the laboratory and may be analyzedusing the finite element method. These devices are composed of many components interacting throughdiverse contact interfaces. Generally, a Coulomb friction law is suficient to take into account frictionbetween smooth surfaces. However, in the case of mechanical anchorages, a gripping system, namedherein the wedge-tendon system, is used to anchor the prestressing tendon. The wedge inner surface ismade of a series of triangular notches designed to grip the tendon. In this particular case, the Coulomblaw is not adapted to simulate the contact interface. The present paper deals with a new constitutivecontact/gripping law to simulate the gripping effect. A parameter identification procedure, based onexperimental results as well as on a finite element/neural network approach, is presented. It isdemonstrated that all parameters have been selected in a satisfactory way and that the proposedconstitutive law is well adapted to simulate the wedge gripping effect taking place in a mechanicalanchorage device.
|
토목공학
| null |
kci_detailed_000084.xml
|
|||
ART001195666
|
oai_dc
|
Dynamic analysis of gradient elastic flexural beams
|
Dynamic analysis of gradient elastic flexural beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S.Papargyri-Beskou(Aristotle University of Thessaloniki); D.Polyzos(University of Patras); D.E.Beskos(University of Patras)"
] |
Gradient elastic flexural beams are dynamically analysed by analytic means. The governingequation of flexural beam motion is obtained by combining the Bernoulli-Euler beam theory and thesimple gradient elasticity theory due to Aifantis. All posible boundary conditions (classical and non-classical or gradient type) are obtained with the aid of a variational statement. A wave propagationanalysis reveals the existence of wave dispersion in gradient elastic beams. Free vibrations of gradientelastic beams are analysed and natural frequencies and modal shapes are obtained. Forced vibrations ofthese beams are also analysed with the aid of the Laplace transform with respect to time and theirresponse to loads with any time variation is obtained. Numerical examples are presented for both free andforced vibrations of a simply supported and a cantilever beam, respectively, in order to assess the gradienteffect on the natural frequencies, modal shapes and beam response.
|
토목공학
| null |
kci_detailed_000085.xml
|
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