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ART001197887
|
oai_dc
|
Time domain earthquake response analysis method for 2-D soil - structure interaction systems
|
Time domain earthquake response analysis method for 2-D soil - structure interaction systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"DooKieKim(Kunsan National University); Chung-BangYun(Korea Advanced Institute of Science and Technology)"
] |
A time domain method is presented for soil-structure interaction analysis under seismicexcitations. It is based on the finite element formulation incorporating infinite elements for the far fieldsoil region. Equivalent earthquake input forces are calculated based on the free field responses along theinterface between the near and far field soil regions utilizing the fixed exterior boundary method in thefrequency domain. Then, the input forces are transformed into the time domain by using inverse Fouriertransform. The dynamic stiffness matrices of the far field soil region formulated using the analyticalfrequency-dependent infinite elements in the frequency domain can be easily transformed into thecorresponding matrices in the time domain. Hence, the response can be analytically computed in the timedomain. A recursive procedure is proposed to compute the interaction forces along the interface and theresponses of the soil-structure system in the time domain. Earthquake response analyses have been carriedout on a multi-layered half-space and a tunnel embedded in a layered half-space with the assumption ofthe linearity of the near and far field soil region, and results are compared with those obtained by theconventional method in the frequency domain.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001197683
|
oai_dc
|
Behaviour of interfacial layer alog granular soil-structure interfaces
|
Behaviour of interfacial layer alog granular soil-structure interfaces
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"WenxiongHuang(University of Newcastle); ErichBauer(Graz University of Technology); ScottW.Sloan(University of Newcastle)"
] |
As shear occurs along a soil-structure interface, a localized zone with a thickness of severalgrain diameters will develop in soil along the interface, forming an interfacial layer. In this paper, thebehaviour of a soil-structure interface is studied numerically by modelling the plane shear of a granularlayer bounded by rigid plates. The mechanical behaviour of the granular material is described with amicro-polar hypoplastic continuum model. Numerical results are presented to show the development ofshear localization along the interface for shearing under conditions of constant normal pressure andconstant volume, respectively. Evolution of the resistance on the surface of the bounding plate isconsidered with respect to the influences of grain rotation.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001197682
|
oai_dc
|
Identification of dynamic characteristics of structures using vector backward auto-regressive model
|
Identification of dynamic characteristics of structures using vector backward auto-regressive model
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Chen-FarHung(National Taiwan University); Wen-JiunnKo(National Taiwan University); Yen-TunPeng(National Taiwan University)"
] |
This investigation presents an efficient method for identifying modal characteristics from themeasured displacement, velocity and acceleration signals of multiple channels on structural systems. AVector Backward Auto-Regressive model (VBAR) that describes the relationship between the outputinformation in diferent time steps is used to establish a backward state equation. Generally, the accuracyof the identified dynamic characteristics can be improved by increasing the order of the Auto-Regressivemodel (AR) in cases of measurement of data under noisy circumstances. However, a higher-order ARmodel also induces more numerical modes, only some of which are the system modes. The proposedVBAR model provides a clear characteristic boundary to separate the system modes from the spuriousmodes. A numerical example of a lumped-mass model with three DOFs was established to verify theapplicability and effectiveness of the proposed method. Finally, an offshore platform model wasexperimentally employed as an application case to confirm the proposed VBAR method can be applied toreal-world structures.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000909762
|
oai_dc
|
Connection stiffness and natural frequency of DuraGal lightweight floor systems
|
Connection stiffness and natural frequency of DuraGal lightweight floor systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"X.L.Zhao(Monash University); G.Taplin(Monash University); M.Alikhail(Monash University)"
] |
This paper reports a series of component tests on a lightweight flor system and a method topredict the natural frequency of the floor using a frame analysis program. Full-scale floor tests are alsobriefly described. DuraGal steel Rectangular Hollow Sections (in-line galvanised RHS) are used as joists,bearers and piers in DuraGal lightweight floor systems. A structural grade particleboard is used asdecking. Connection stiffness between diferent components (bearer, joist, pier and floor decking) wasdetermined. A 40% composite action was achieved between the RHS joist and the particleboard. Both 2Dand 3D models were developed to study the effect of connection stiffness on predicting the naturalfrequency of DuraGal lightweight floor systems. It has been found that the degree of shear connectionbetween the bearer and the joist has a significant influence on the flor natural frequency. The predictednatural frequencies are compared with measured values from full scale floor testing.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000911378
|
oai_dc
|
Strength of FRP RC sections after long-term loading
|
Strength of FRP RC sections after long-term loading
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.A.Pisani(Politecnico di Milano)"
] |
The adoption of fibre reinforced polymer (FRP) rebars (whose behaviour is elastic-brittle) inreinforced concrete (RC) cros sections requires the assessment of the influence of time-dependentbehaviour of concrete on the load-carrying capacity of these sections. This paper presents a method ofcomputing the load-carying capacity of sections that are at first submitted to a constant long-term serviceload and then overloaded up to ultimate load. The method solves first a non-linear visco-elastic problem,and then a non-linear instantaneous analysis up to ultimate load that takes into account the self-equilibrated stress distribution previously computed. This method is then adopted to perform a parametricanalysis that shows that creep and shrinkage of concrete increase the load-carrying capacity of the crosssection reinforced with FRP and allows for the suggestion of simple design rules.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000911380
|
oai_dc
|
A study on the measurement of plastic zone and crack growth length at the crack tip under cyclic loading using ESPI system
|
A study on the measurement of plastic zone and crack growth length at the crack tip under cyclic loading using ESPI system
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kyung-SuKim(Inha University); Ki-SungKim(Inha University); Chun-SikShim(Inha University)"
] |
The magnitude of the plastic zone around the crack tip of DENT (Double Edge NotchedTension) specimen and the crack growth length under cyclic loading were measured by ESPI (ElectronicSpeckle Patern Interferometry) system. The measured magnitude of plastic zone was compared with theproposed by Irwin and calculated by a nonlinear static method of MSC/NASTRAN. The measured crackgrowth length by ESPI system was also compared with the obtained data by the image analysis system.From the study, it is confirmed that the plastic zone and crack growth length can be measured accuratelywith the high-tech equipment (ESPI System).
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000911374
|
oai_dc
|
A frictionless contact problem for two elastic layers supported by a Winkler foundation
|
A frictionless contact problem for two elastic layers supported by a Winkler foundation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"AhmetBirinci(Karadeniz Technical University); RagipErdol(Karadeniz Technical University)"
] |
The plane contact problem for two infinite elastic layers whose elastic constants and heightsare different is considered. The layers lying on a Winkler foundation are acted upon by symmetricaldistributed loads whose lengths are 2a applied to the upper layer and uniform vertical body forces due tothe effect of gravity in the layers. It is assumed that the contact between two elastic layers is frictionlessand that only compresive normal tractions can be transmitted through the interface. The contact along theinterface will be continuous if the value of the load factor, l , is less than a critical value. However,interface separation takes place if it exceeds this critical value. First, the problem of continuous contact issolved and the value of the critical load factor, l cr, is determined. Then, the discontinuous contactproblem is formulated in terms of a singular integral equation. Numerical solutions for contact stressdistribution, the size of the separation areas, critical load factor and separation distance, and verticaldisplacement in the separation zone are given for various dimensionles quantities and distributed loads.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000911364
|
oai_dc
|
Embedment of structural monitoring algorithms in a wireless sensing unit
|
Embedment of structural monitoring algorithms in a wireless sensing unit
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"JeromePeterLynch(Stanford University); ArvindSundararajan(Stanford University); KinchoH.Law(Stanford University); AnneS.Kiremidjian(Stanford University); ThomasKenny(Stanford University); EdCarryer(Stanford University)"
] |
Complementing recent advances made in the field of structural health monitoring and damagedetection, the concept of a wireless sensing network with distributed computational power is proposed.The fundamental building block of the proposed sensing network is a wireless sensing unit capable ofacquiring measurement data, interrogating the data and transmitting the data in real time. Thecomputational core of a prototype wireles sensing unit can potentially be utilized for execution ofembedded engineering analyses such as damage detection and system identification. To illustrate thecomputational capabilities of the proposed wireless sensing unit, the fast Fourier transform and auto-regressive time-series modeling are locally executed by the unit. Fast Fourier transforms and auto-regressive models are two important techniques that have been previously used for the identification ofdamage in structural systems. Their embedment illustrates the computational capabilities of the prototypewireless sensing unit and sugests strong potential for unit installation in automated structural healthmonitoring systems.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000907469
|
oai_dc
|
Finite strip analysis of a box girder simulating the hull of a ship
|
Finite strip analysis of a box girder simulating the hull of a ship
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"G.Akhras(Royal Military Colleage of Canada); J.P.Tremblay(Department of National Defence); T.Graham,M.S.Cheung(Carleton University); W.C.Li(Carleton University)"
] |
In the present study, the finite strip analysis of a box girder to simulate a ships hull model iscarried out to investigate its inelastic post-buckling behavior and to predict its ultimate flexural strength.Residual stresses and initial geometrical imperfections are both considered in the combined material andgeometrical nonlinear analysis. The von-Mises yield criterion and the Prandtl-Reuss flow theory ofplasticity are applied in modeling the elasto-plastic behavior of material. The Newton-Raphson iterativeprocess is also employed in the analysis to achieve convergence. The numerical results agree well withthe experimental data. The effects of some material and geometrical parameters on the ultimate strength ofthe structure are also investigated.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000907473
|
oai_dc
|
Dynamic response analysis of closed loop control system for intelligent truss structures based on probability
|
Dynamic response analysis of closed loop control system for intelligent truss structures based on probability
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"W.Gao(Xidian University); J.J.Chen(Xidian University); H.B.Ma(Xidian University); X.S.Ma(Xidian University); M.T.Cui(Xidian University)"
] |
The dynamic response analysis of closed loop control system based on probability for theintelligent truss structures with random parameters is presented. The expressions of numericalcharacteristics of structural dynamic response of closed loop control system are derived by means of themode superposition method, in which the randomness of physical parameters of structural materials,geometric dimensions of active bars and passive bars, applied loads and control forces are consideredsimultaneously. The influences of the randomness of them on structural dynamic response are inspectedby several engineering examples and some significant conclusions are obtained.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000907370
|
oai_dc
|
Determination of crack spacing and crack width in reinforced concrete beams
|
Determination of crack spacing and crack width in reinforced concrete beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"R.Piyasena(Griffith University); Yew-ChayeLoo(Griffith University); SamFragomeni(Griffith University)"
] |
In this paper spacing and width of flexural cracks in reinforced concrete beams aredetermined using two-dimensional finite element analysis. At early loading stages on the beam theprimary crack spacing is based on the slip length, which is the development length required to resist thesteel stress increment that occurs at a cracked section the formation of the first flexural crack. A semi-empirical formula is presented in this paper for the determination of the slip length for a given beam. Athigher load levels, the crack spacing is based on critical crack spacing, which is defined as the particularcrack spacing that would produce a concrete tensile stres equal to the flexural strength of concrete. Theresulting crack width is calculated as the relative diference in extensions of steel reinforcement andadjacent concrete evaluated at the cracked section. Finally a comparative study is undertaken, whichindicates that the spacing and width of cracks calculated by this method agree well with values measuredby other investigators.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000907468
|
oai_dc
|
A co-rotational 8-node assumed strain element for large displacement elasto-plastic analysis of plates and shells
|
A co-rotational 8-node assumed strain element for large displacement elasto-plastic analysis of plates and shells
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"K.D.Kim(Asian Institute of Technology)"
] |
The formulation of a non-linear shear deformable shell element is presented for the solutionof stability problems of stiffened plates and shells. The formulation of the geometrical stiffness presentedhere is exactly defined on the midsurface and is efficient for analyzing stability problems of thick platesand shells by incorporating bending moment and transverse shear resultant force. As a result of theexplicit integration of the tangent stiffness matrix, this formulation is computationally very efficient inincremental nonlinear analysis. The element is free of both membrane and shear locking behaviour byusing the assumed strain method such that the element performs very well in the thin shells. By using sixdegrees of freedom per node, the present element can model stiffened plate and shell structures. Theformulation includes large displacement effects and elasto-plastic material behaviour. The material isassumed to be isotropic and elasto-plastic obeying Von Misess yield condition and its associated flowrules. The results showed good agreement with references and computational efficiency.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000907476
|
oai_dc
|
Analysis of circular plates on two - parameter elastic foundation
|
Analysis of circular plates on two - parameter elastic foundation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"AhmetSaygun(Istanbul Technical University); MecitCelik(Istanbul Technical University)"
] |
In this study, circular plates subjected to general type of loads and supported on a two-parameter elastic foundation are analysed. The stiffness, elastic bedding and soil shear effect matrices of afully compatible ring sector plate element, developed by Saygun (1974), are obtained numericallyassuming variable thickness of the element. Ring sector soil finite element is also defined to determine thedeflection of the soil surface outside the domain of the plate in order to establish the interaction betweenthe plate and the soil. According to Valabhan and Das (1991) the elastic bedding (C) and shearparameters (CT) of the foundation are expressed depending on the elastic constants (Es, ns) and thethickness of compressible soil layer (Hs) and they are calculated with a suitable iterative procedure. Usingring sector elements presented in this paper, permits the generalization of the loading and the boundaryconditions of the soil outside the plate.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000907372
|
oai_dc
|
Nonlinear behavior of deep reinforced concrete coupling beams
|
Nonlinear behavior of deep reinforced concrete coupling beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Z.Z.Zhao(Tsinghua University); A.K.H.Kwan(University of Hong Kong)"
] |
Six large scale models of conventionally reinforced concrete coupling beams with span/depthratios ranging from 1.17 to 2.0 were tested under monotonically applied shear loads to study theirnonlinear behavior using a newly developed test method that maintained equal rotations at the two endsof the coupling beam specimen and allowed for local deformations at the beam-wall joints. By conductingthe tests under displacement control, the post-peak behavior and complete load-deflection curves of thecoupling beams were obtained for investigation. It was found that after the appearance of flexural andshear cracks, a deep coupling beam would gradually transform itself from an ordinary beam to a trusscomposed of diagonal concrete struts and longitudinal and transverse steel reinforcement bars. Moreover,in a deep coupling beam, the local deformations at the beam-wall joints could contribute significantly (upto the order of 50%) to the total deflection of the coupling beam, especially at the post-peak stage.Finally, although a coupling beam failing in shear would have a relatively low ductility ratio of only 5 oreven lower, a coupling beam failing in flexure could have a relatively high ductility ratio of 10 or higher.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001195817
|
oai_dc
|
Natural vibration analysis of coaxial shells coupled with fluid
|
Natural vibration analysis of coaxial shells coupled with fluid
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"MyungJoJhung(Korea Institute of Nuclear Safety); YoungHwanChoi(Korea Institute of Nuclear Safety); KyeoungHoonJeong(Korea Atomic Energy Research Institute)"
] |
Investigated in this study are the natural vibration characteristics of the coaxial cylindricalshels coupled with a fluid. Theoretical method is developed to find the natural frequencies of the shelusing the finite Fourier series expansion, and their results are compared with those of finite elementmethod to verify the validation of the method developed. The effect of the fluid-filed annulus and theboundary conditions on the modal characteristics of the coaxial shels is investigated using a finiteelement modeling.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000906992
|
oai_dc
|
Closed form solution for displacements of shick cylinders with varying thickness subjected to non-uniform internal pressure
|
Closed form solution for displacements of shick cylinders with varying thickness subjected to non-uniform internal pressure
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"H.R.Eipackchi(Tarbiat Modarres University); G.H.Rahimi(Tarbiat Modarres University); S.EsmaeilzadehKhadem(Tarbiat Modarres University)"
] |
In this paper a thick cylindrical shel with varying thicknes which is subjected to static non-uniform internal presure is analyzed. At first, equilibrium equations of the shel have been derived by theenergy principle and by considering the first order theory of Mirsky-Herrmann which includes transverseshear deformation. Then the governing equations which are, a system of diferential equations withvarying coeficients have been solved analyticaly with the boundary layer technique of the perturbationtheory. In spite of complexity of modeling the conditions near the boundaries, the method of this paper isvery capable of providing a closed form solution even near the boundaries. Displacement predictions arein a good agreement with the calculated finite elements and other analytical results. The convergence ofsolution is very fast and the amount of calculations is les than the Frobenius method.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000906993
|
oai_dc
|
Analytical model of corrosion-induced cracking of concrete considering the stiffness of reinforcement
|
Analytical model of corrosion-induced cracking of concrete considering the stiffness of reinforcement
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"KapileshBhargava(Bhabha Atomic Research Center); A.K.Ghosh(Bhabha Atomic Research Center); YasuhiroMori(Nagoya University); Sramanujam(Bhabha Atomic Research Center)"
] |
토목공학
| null |
kci_detailed_000085.xml
|
||||
ART000906991
|
oai_dc
|
Real-time modeling prediction for excavation behavior
|
Real-time modeling prediction for excavation behavior
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Li-FengNi(Southeast University); Ai-QunLi(Southeast University); Fu-YiLiu(First Institute of Shenzhen General Institute of Design and Research); HonoreYin(ENPC-LAMI); J.R.Wu(City University of Hong Kong)"
] |
Two real-time modeling prediction (RMP) schemes are presented in this paper for analyzingthe behavior of deep excavations during construction. The first RMP scheme is developed from thetraditionalAR(p) model. The second is based on the simplified Elman-style recurrent neural networks. Anon-line learning algorithm is introduced to describe the dynamic behavior of deep excavations. As a casestudy, in-situ measurements of an excavation were recorded and the measured data were used to verifythe reliability of the two schemes. They proved to be both effective and convenient for predicting thebehavior of dep excavations during construction. It is shown through the case study that the RMPscheme based on the neural network is more acurate than that based on the traditional AR(p) model.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001003801
|
oai_dc
|
Analysis of quasi-brittle materials using two-dimensional polygon particle assemblies
|
Analysis of quasi-brittle materials using two-dimensional polygon particle assemblies
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"이종석(울산대학교); YoonBockRhie(Rhie & Associates); 김익현(울산대학교)"
] |
This paper contains the results of the study on the development of fracture and crackpropagation in quasi-britle materials, such as concrete or rocks, using the Discrete Element Method(DEM). A new discrete element numerical model is proposed as the basis for analyzing the inelasticevolution and growth of cracks up to the point of gross material failure. The model is expected to predictthe fracture behavior for the quasi-britle material structure using the elementary aggregate level, theinteraction betwen aggregate materials, and bond cementation. The algorithms generate normal and shearforces betwen two interfacing blocks and contains two kinds of contact logic, one for connected blocksand the other one for blocks that are not directly connected. The Mohr-Coulomb theory has been used forthe fracture limit. In this algorithm the particles are moving based on the conected block logic until theforces increase up to the fracture limit. After pasing the limit, the particles are governed by the discreteblock logic. In seting up a discrete polygon element model, two dimensional polygons are used toinvestigate the response of an asembly of diferent shapes, sizes, and orientations with blocks subjectedto simple applied loads. Several examples involving asemblies of particles are presented to show thebehavior of the fracture and the failure process.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001003799
|
oai_dc
|
Non-Linear fire-resistance analysis of reinforced concrete beams
|
Non-Linear fire-resistance analysis of reinforced concrete beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"SebastjanBratina(University of Ljubljana); LgorPlaninc(University of Ljubljana); MiranSaje(University of Ljubljana); GoranTruk(University of Ljubljana)"
] |
The non-linear structural analysis of reinforced concrete beams in fire consists of threseparate steps: (i) The estimation of the rise of surrounding air temperature due to fire; (ii) thedetermination of the distribution of the temperature within the beam during fire; (i) the evaluation of themechanical response due to simultaneous time-dependent thermal and mechanical loads. Steps (i) and (iii)are dealt with in the present paper. We present a two-step computational procedure where a 2D transientthermal analysis over the cros-sections of beams are made first, followed by mechanical analysis of thestructure. Fundamental to the acuracy of the mechanical analysis is a new planar beam finite element.The efects of plasticity in concrete, and plasticity and viscous crep in stel are taken into consideration.The properties of concrete and stel along with the values of their thermal and mechanical parameters aretaken acording to the European standard ENV 1992-1-2 (1995). The comparison of our numerical andful-scale experimental results shows that the proposed mechanical and 2D thermal computationalprocedure is capable to describe the actual response of reinforced concrete beam structures to fire.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001197896
|
oai_dc
|
Infilled frames: developments in the evaluation of the stiffening effect of infills
|
Infilled frames: developments in the evaluation of the stiffening effect of infills
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M.Papia(Universita di Palermo); L.Cavaleri,M.Fossetti(Universita di Palermo)"
] |
In order to consider the modified seismic response of framed structures in the presence ofmasonry infils, proper models have to be formulated. Because of the complexity of the problem, acareful definition of a diagonal pin-jointed strut, able to represent the horizontal force-interstoreydisplacement cyclic law of the actual infil, may be a solution. In this connection the present paper showsa generalized criterion for the determination of the ideal cros-section of the strut mentioned before. Theprocedure is based on the equivalence betwen the lateral stiffnes of the actual infiled frame schemeduring the conventional elastic stage of the response and the lateral stiffnes of the same frame stiffenedby a strut at the same stage. Unlike the usual empirical approaches available in the literature, theproposed technique involves the axial stifnes of the columns of the frame more than their flexuralstifnes. Further, the influence of the bidimensional behaviour of the infil is stresed and, consequently,the dependence of the dimensions of the equivalent pin-jointed strut on the Poison ratio of the materialconstituting the infil is also shown. The proposed approach is extended to the case of infils withopenings, which is very comon in practical applications.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000947965
|
oai_dc
|
Local stress field for torsion of a penny-shaped crack in a transversely isotropic functionally graded strip
|
Local stress field for torsion of a penny-shaped crack in a transversely isotropic functionally graded strip
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"W. J. Feng(Shijiazhuang Railway Inst.); R. K. L. Su(The University of Hong Kong)"
] |
The torsion of a penny-shaped crack in a transversely isotropic strip is investigated in thispaper. The shear moduli are functionally graded in such a way that the mathematics is tractable. Hankelis obtained by taking the asymptotic behavior of Bessel function into account. The effects of materialproperty parameters and geometry criterion on the stress intensity factor are investigated. Numericalperpendicular to the crack surface can suppress crack initiation and growth, and that the stress intensityfactor varies little with the increasing of the strips height.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115207
|
oai_dc
|
Strength and strain enhancements of concrete columns confined with FRP sheets
|
Strength and strain enhancements of concrete columns confined with FRP sheets
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"G. Campione(Univ. di Palermo); N. Miraglia(Univ. di Palermo); M. Papia(Univ. di Palermo)"
] |
The compressive behavior up to failure of short concrete members reinforced with fibercross-sections are analysed by means of a simplifiedelastic model, able also to explain stress-concentration. The model allows one to evaluate the equivalentuniform confining pressure in ultimate conditions referred to the effective confined cross-section and tothe effective stresses in FRP along the sides of section; consequently, it makes it possible to determineeffect of local reinforcements constitute by single strips applied at corners before the continuous wrappingand the effect of round corners are also considered. Analytical results are compared to experimentalvalues available in the literature.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115254
|
oai_dc
|
An element-based 9-node resultant shell element for large deformation analysis of laminated composite plates and shells
|
An element-based 9-node resultant shell element for large deformation analysis of laminated composite plates and shells
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. C. Han(Daewon Science College); K. D. Kim(Asian Inst. of Tech.); W. Kanok-Nukulchai(Asian Inst. of Tech.)"
] |
The Element-Based Lagrangian Formulation of a 9-node resultant-stress shell element is
presented for the isotropic and anisotropic composite material. The effect of the coupling term between
the bending strain and displacement has been investigated in the warping problem. The strains, stresses
and constitutive equations based on the natural co-ordinate have been used throughout the Element-Based
Lagrangian Formulation of the present shell element which offers an advantage of easy implementation
compared with the traditional Lagrangian Formulation. The element is free of both membrane and shear
locking behavior by using the assumed natural strain method such that the element performs very well in
thin shell problems. In composite plates and shells, the transverse shear stiffness is defined by an
equilibrium approach instead of using the shear correction factor. The arc-length control method is used to
trace complex equilibrium paths in thin shell applications. Several numerical analyses are presented and
discussed in order to investigate the capabilities of the present shell element. The results showed very
good agreement compared with well-established formulations in the literature.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000947970
|
oai_dc
|
Lateral buckling formula of stepped beams with length-to-height ratio factor
|
Lateral buckling formula of stepped beams with length-to-height ratio factor
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jong Sup Park(Samsung Corporation)"
] |
Lateral-torsional buckling moment resistances of I-shaped stepped beams with continuous
lateral top-flange bracing under a single point load on the top flange and negative end moments were
investigated. Stepped beam factors and a moment gradient correction factor suggested by Park et al.
(2003, 2004) were used to develop new lateral buckling formula for beam designs. From the investigation
of finite element analysis (FEA), new lateral buckling formula of beams with singly or doubly stepped
member changes and with continuous lateral top-flange bracing subjected to a single point load on top
flange and end moments were developed. The new design equation includes the length-to-height ratio
factor to account for the increase of lateral-torsional buckling moment resistance as the increase of lengthto-
height ratio of stepped beams. The calculation examples for obtaining lateral-torsional buckling moment
resistance using the new design equation indicate that engineers should easily determine the buckling
capacity of the stepped beams.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115206
|
oai_dc
|
Numerically intergrated modified virtual crack closure integral technique for 2-D crack problems
|
Numerically intergrated modified virtual crack closure integral technique for 2-D crack problems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"G. S. Palani(CSIR Campus); B. Dattaguru(Indian Inst. of Science); Nagesh R. Iyer(CSIR Campus)"
] |
Modified virtual crack closure integral (MVCCI) technique has become very popular forcomputation of strain energy release rate (SERR) and stress intensity factor (SIF) for 2-D crack problems.The objective of this paper is to propose a numgeneralize the technique and make its application much wider. This new procedure called as numericallyintegrated MVCCI (NI-MVCCI) will remove the dependence of MVCCI equations on the type of finiteelement employed in the basic stres analysis. Numerical studies on fracture analysis of 2-D crack (modeI and II) problems have been conducted by employing 4-noded, 8-noded (regular & quarter-point), 9-noded and 12-noded finite elements. For non-singular (regular) elements at crack tip, NI-MVCCItechnique generates the same results as MVCCI, but the advantage for higher order regular and singularelements is that complex equations for MVCCI need not be derived. Gaus numerical integration rule tobe employed for 8-noded singular (quarter-point) element for accurate computation of SERR and SIF hasbeen recomended based on the numerical studies.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115162
|
oai_dc
|
Damage detection of mono-coupled multistory buildings: Numerical and experimental investigations
|
Damage detection of mono-coupled multistory buildings: Numerical and experimental investigations
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. L. Xu(The Hong Kong Polytech. Univ.); Hongping Zhu(The Hong Kong Polytech. Univ.); J. Chen(The Hong Kong Polytech. Univ.)"
] |
This paper presents numerical and experimental investigations on damage detection of mono-mono-coupled multistory building is first derived using the transfer matrix method. Closed-form sensitivityequation is established to relate the relative change in the stiffness of each story to the relative changes inwith its special features and minimizing the norm of an objective function with an inequality constraint.Numerical and experimental investigations are finally conducted on a mono-coupled 3-story buildingof acuracy of damage detection is discussed. A mono-coupled 10-story building is further used toexamine the capability of the proposed algorithm against measurement noise and incomplete measureddetected, located, and quantified if all sensitive natural frequencies to damaged stories are available. Theproposed damage detection algorithm is not sensitive to measurement noise and modeling error.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115208
|
oai_dc
|
Experiment study of structural random loading identification by the inverse pseudo excitation method
|
Experiment study of structural random loading identification by the inverse pseudo excitation method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Xing-Lin Guo(Dalian Univ. of Tech.); Dong-Sheng Li(Dalian Univ. of Tech.)"
] |
The inverse pseudo excitation method is used in the identification of random loadings. Forstructures subjected to stationary random excitations, the power spectral density matrices of such loadingsare identified experimentally. The identification isstructural frequency response functions. Numerical simulation is used in the optimal selection of sensorlocations. The proposed method has been successfully applied to the loading identification experiments ofthree structural models, two uniform steel cantilever beams and a four-story plastic glass frame, subjectedactual excitations. It is proved that the proposed method is quite accurate and efficient in addition to itsability to alleviate the ill conditioning of the structural frequency response functions.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000947963
|
oai_dc
|
A generalized adaptive incremental approach for solving inequality problems of convex nature
|
A generalized adaptive incremental approach for solving inequality problems of convex nature
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M. M. Hassan(Zagazig University); F. F. Mahmoud(Zagazig University)"
] |
A proposed incremental model for the solution of a general class of convex programmingproblems is introduced. The model is an extension of that developed by Mahmoud et al. (1993) which islimited to linear constraints having nonzero free coefficients. In the present model, this limitation iscoefficients. The proposed model is applied to solve the elasto-static contact problems as a class ofvariation inequality problems of convex nature. A set of different physical nature verification examples issolved and discussed in this paper.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114974
|
oai_dc
|
Numerical study of mono-strand anchorage mechanism under service load
|
Numerical study of mono-strand anchorage mechanism under service load
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"D. Marceau(Univ. of Quebec at Chicoutimi); M. Fafard(Laval University); J. Bastien(Laval University)"
] |
Anchorage devices play an important role in post-tensioned bridge structures since they must
sustain heavy loads in order to permit the transfer of the prestressing force to the structure. In external
prestressing, the situation is even more critical since the anchorage mechanisms, with the deviators, are
the only links between the structure and the tendons throughout the service life of the structure. The
behaviour of anchorage devise may be studied by using the finite element method. To do so, each
component of the anchorage must be adequately represented in order to approximate the anchor
mechanism as accurately as possible. In particular, the modelling of the jaw/tendon device may be carried
out using the real geometry of these two components with an appropriate constitutive contact law or by
replacing these components by a single equivalent. This paper presents the numerical study of a monostrand
anchorage device. The results of a comparison between two different representations of the jaw/
tendon device, either as two distinct components or as a single equivalent, will be examined. In the
double-component setup, the influence of the wedge configuration composing the jaw, and the influence
of lubrication of the anchor, will be assessed.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114972
|
oai_dc
|
Unconditional stability for explicit pseudodynamic testing
|
Unconditional stability for explicit pseudodynamic testing
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. Y. Chang(Nat. Taipei Univ. of Tech.)"
] |
In this study, a newly developed unconditionally stable explicit method is employed to solvemomentum equations of motion in performing pseudodynamic tests. Due to the explicitness of each timewhen compared to an implicit pseudodynamic algorithm. In addition, the unconditional stability might bethe most promising property of this algorithm in performing pseudodynamic tests. Furthermore, it canhave the improved properties if using momentum equations of motion instead of force equations ofnumerically. In addition, actual pseudodynamic tests are performed to confirm the superiority of thispseudodynamic algorithm.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114975
|
oai_dc
|
Seismic behavior of high-strength concrete flexural walls with boundary elements
|
Seismic behavior of high-strength concrete flexural walls with boundary elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Seung-Hun Kim(LG Eng. & Constr. Co.); Ae-Bock Lee(Chungnam Nat. Univ); Byung-Chan Han(Chungnam Nat. Univ); 하상수(한양대학교); 윤현도(충남대학교)"
] |
This paper addreses the behavior and strength of structural walls with a concretecompresive strength exceeding 69 MPa. This information also enhances the curent database foraxial-load ratio on seismic behavior of high-strength concrete flexural walls. An analysis has been carriedout in order to assess the contribution of deformation components, i.e., flexural, diagonal shear, andsliding shear on total displacement. The results fromprevailing inelastic deformation mode in each of wall. Moment-curvature characteristics, ductility anddamage index are quantified and discussed in relation with axial stress levels. Experimental results showcharacteristics and ductility of high-strength concrete structural walls.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114973
|
oai_dc
|
Prediction of contact lengths between an elastic layer and two elastic circular punches with neural networks
|
Prediction of contact lengths between an elastic layer and two elastic circular punches with neural networks
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"T. Su. Ozsahin(Karadeniz Tech. Univ.); A. Birinci(Karadeniz Tech. Univ.); A. O. Cakiroglu(Karadeniz Tech. Univ.)"
] |
This paper explores the potential use of neural networks (NNs) in the field of contactmechanics. A neural network model is developed for predicting, with suficient approximation, the contactlengths between the elastic layer and two elastic circular punches. A backpropagation neural network ofthree layers is employed. First contact problem is solved according to the theory of elasticity with integraldiferent neural network configurations is investigated. Effect of parameters such as load factor, elasticpunch radii and flexibilities that influence the contact lengths is also explored. The results of thetheoretical solution and the outputs generated from the neural network are compared. Results indicate thatmethod that can reduce time consumed.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000947962
|
oai_dc
|
Dynamic analysis of ROV cable considering the coupling motion of ROV cable systems
|
Dynamic analysis of ROV cable considering the coupling motion of ROV cable systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kyu Nam Cho(Hongik University); Ha Cheol Song(Seoul Nat. University); Do Chun Hong(Korea Res. Inst. of Ships & Ocean Eng.)"
] |
Remotely Operated Vehicle of 60-meters is a new conceptual equipment made to replacethe manned systems for investigating the deep-sea environment, and all of the ROV systems inoperational condition strongly depend on the connecting cables. In this point of view dynamics of theROV cable system is very important for operational and safety aspects as a cable generally encountersgreat tension. Researches have been executed on this problem, and most of papers have been mainlyfocused on the operational condition of ROV system in deep sea. This paper presents the dynamic cableresponse analysis during ROV launching condition rather than the operational one in order to provide thedesign guide of a ROV cable system in this circumstance, considering the coupling effects between cableand wave-induced ship motion. To obtain the variations of cable tensions during a ROV launching, a pre-stresed harmonic response analysis was carried out. Wave-induced tensions of the cable during ROVlaunching were obtained in real sea states using FE modeling, and the basic design guide of a ROV cablesystem was obtained.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114930
|
oai_dc
|
Improvement of the earthquake resistance of R/C beam-column joints under the influence of P-Δ effect and axial force variations using inclined bars
|
Improvement of the earthquake resistance of R/C beam-column joints under the influence of P-Δ effect and axial force variations using inclined bars
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. G. Tsonos(Aristotle Univ. of Thessaloniki)"
] |
In this study, theoretical and experimental results are presented which were obtained during
an investigation of the influence of the P-Δ effect that was caused by the simultaneous changing of the
axial load P of the column and the lateral displacement Δ in the external beam-column joints. The
increase or decrease of Δ was simultaneous with the increase or decrease of the axial compression load P
and caused an additional influence on the aseismic mechanical properties of the joint. A total of 12
reinforced concrete exterior beam-column subassemblies were examined. A new model, which predicts the
beam-column joint ultimate shear strength, was used in order to predict the seismic behaviour of beamcolumn
joints subjected to earthquake-type loading plus variable axial load and P-Δ effect. Test data and
analytical research demonstrated that axial load changes and P-Δ effect during an earthquake cause
significant deterioration in the earthquake-resistance of these structural elements. It was demonstrated that
inclined bars in the joint region were effective for reducing the unfavourable impact of the P-Δ effect and
axial load changes in these structural elements.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115018
|
oai_dc
|
Nonlinear analyses of structures with added passive devices
|
Nonlinear analyses of structures with added passive devices
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"C.S. Tsai(Feng Chia University); Kuei-Chi Chen(Feng Chia University)"
] |
Many types of passive control devices have been recognized as effective tools for improving
the seismic resistance of structures. A lot of past research has been carried out to study the response of
structures equipped with energy-absorbing devices by assuming that the behavior of the beam-column
systems are linearly elastic. However, linear theory may not be adequate for beams and columns during
severe earthquakes. This paper presents the results of research on the nonlinear responses of structures
with and without added passive devices under earthquakes. A new material model based on the plasticity
theory and the two-surface model for beams and columns under six components of forces is proposed to
predict the nonlinear behavior of beam-column systems. And a new nonlinear beam element in
consideration of shear deformation is developed to analyze the beams and columns of a structure.
Numerical results reveal that linear assumption may not be appropriate for beams and columns under
seismic loadings, especially for unexpectedly large earthquakes. Also, it may be necessary to adopt
nonlinear beam elements in the analysis and design process to assure the safety of structures with or
without the control of devices.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114928
|
oai_dc
|
Interface characteristics of RC beams strengthened with FRP plate
|
Interface characteristics of RC beams strengthened with FRP plate
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Minglan Peng(Jiaotong University); Zhifei Shi(Jiaotong University)"
] |
A four-point bending RC beam strengthened with FRP plate is investigated based on thetheory of elasticity. Taking the adhesive layer into account but ignoring some secondary parameters, theanalytical solutions of the normal stress and shear stress on concrete-adhesive interface are obtained anddiscussed. Besides, the pure bending region of the beam is analyzed and the ultimate load of the beam ispredicted. The results obtained in the present paper agree very well with both the results of FEM and theexperimental findings.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114883
|
oai_dc
|
A semi-active acceleration-based control for seismically excited civil structures including control input impulses
|
A semi-active acceleration-based control for seismically excited civil structures including control input impulses
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. Geoffrey Chase(Univ. of Canterbury); L. R. Barroso(Texas A&M University); Stephen Hung(Univ. of Canterbury)"
] |
Structural acceleration regulation is a means of managing structural response energy andenhancing the performance of civil structures undergoing large seismic events. A quadratic outputregulator that minimizes a measure including the total structural acceleration energy is developed andtested on a realistic non-linear, semi-active structural control case study. Suites of large scaled earthquakesare used to statistically quantify the impact of this type of control in terms of changes in the statisticaldistribution of controled structural response. This approach includes the impulses due to control inputsequivalent or better performance in terms of displacement and hysteretic energy reductions, while alsosignificantly reducing peak story accelerations and the associated damage and occupant injury. Forearthquake engineers faced with the dilemma of balancing displacement and acceleration demands thisoccupant safety.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000947968
|
oai_dc
|
Time-dependent stresses and curvatures in cracked R.C. sections under working loads
|
Time-dependent stresses and curvatures in cracked R.C. sections under working loads
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Rajeh Z. Al-Zaid(King Saud University)"
] |
The present study provides a relatively simple and accurate analytical model for theprediction of time-dependent stresses and curvatures of cracked R.C. sections under working loads. Amore simplified solution is also provided. The proposed models are demonstrated by considering anumerical example and conducting a parametric study on the effects of relevant R.C. design parameters.In contrary to tension reinforcement, the compression reinforcement is found to contribute significantly inreducing the total section curvatures. The good accuracyof the proposed approximate solution opens a new vision towards a simple yet accurate model for theprediction of time-dependent effects in R.C. structures.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114929
|
oai_dc
|
Free-edge effect in cross-ply laminated plates under a uniform extension
|
Free-edge effect in cross-ply laminated plates under a uniform extension
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hongyu Sheng(Hefei University); Jianqiao Ye(Univ. of Leeds)"
] |
Based on the basic equations of elasticity, free-edge effects on stresses in cross-ply laminatedplates are found by using the state space method. The laminates are subjected to uniaxial-uniformextension plate, which is a typical example of general plane strain problem. The study takes into accountmaterial constants of all individual material layers and the state equation of a laminate is solvedan arbitrary number of orthotropic layers, each of which may have diferent material properties andthicknes. The solution provides a continuous displacement and inter-laminar stress fields across allayer region of a fre-edge. Numerical solutions are obtained and compared with the results obtained froman alternative numerical method.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000947919
|
oai_dc
|
The standard deviations for eigenvalues of the closed-loop systems with random parameters
|
The standard deviations for eigenvalues of the closed-loop systems with random parameters
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Su Huan Chen(Jilin University); Chun Liu(Jilin University); Yu Dong Chen(Jilin University)"
] |
The vibration control problem of structures with random parameters is discused, which isthe closed-loop systems is presented by using the random perturbation. The method presented in thispaper will not require the distribution function of the random parameters of the systems other than theirmeans and variances. Similarly, the distribution function of the random eigenvalues will not be computedother than their means and variances. The standard deviations of eigenvalues of the uncertain closed-loopsystems can be used to estimate the stability robustnes. The present method is applied to a vibrationcontrol system to illustrate the application. The numerical results show that the present method is effective.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114882
|
oai_dc
|
Fatigue life enhancement of defective structures by bonded repairs
|
Fatigue life enhancement of defective structures by bonded repairs
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Q. Y. Wang(Sichuan University); N. Kawagoishi(Kagoshima University); Q. Chen(Kagoshima University); R. M. Pidaparti(Purdue University)"
] |
Defective metallic components and structures are being repaired with bonded compositepatches to improve overall mechanical and fatigue properties. In this study, fatigue crack growth testspatches. A considerable increase in the fatigue life and a decrease in the stress intensity factor (SIF) wereobserved as the number of patch plies increased. The experimental results demonstrate that the patchconfigurations and patch thickness can enhance fatigue life by order of magnitude. Quantitativecomparisons between analytical and experimental data were made, and the analytical model based on amodified Roses analytical solution appears to best estimate the fatigue life.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114884
|
oai_dc
|
Flexural and axial vibration analysis of beams with different support conditions using artificial neural networks
|
Flexural and axial vibration analysis of beams with different support conditions using artificial neural networks
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Omer Civalek(Akdeniz Univ.)"
] |
An artificial neural network (ANN) application is presented for flexural and axial vibrationobtained using multi layer neural network based back-propagation error learning algorithm. The naturalfrequencies of beams are calculated for six diferent boundary conditions via direct solution of governingdiferential equations of beams and Rayleighs approximate method. The training of the network has beenfor cantilever beam (C-F), and both end free (F-F) in case the axial vibration, and clamped-clamped (C-C), and Guided-Pinned (G-P) support condition in case the flexural vibrations which were not included inthe training set. The results found by using artificial neural network are suficiently close to the theoreticalsuccessful for the purposes of free vibration analysis of elastic beams.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114842
|
oai_dc
|
The effective depth of soil stratum for plates resting on elastic foundation
|
The effective depth of soil stratum for plates resting on elastic foundation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ayse T. Daloglu(Karadeniz Tech. University); K. Ozgan(Karadeniz Tech. University)"
] |
The purpose of this paper is to determine the subsoil depth affected from the load on thedepending on the loading and dimension of the plate. An iterative method is developed in order todetermine the efective depth of the subsoil under the plate. Numerical examples from the technicalliterature are solved by means of the method sugested herein and displacements, bending moments andshear forces are presented in graphical and tabular forms to evaluate the effects of the limit depthconsidered in the study. Results showed the efficiency and simplicity of the present approach for the plateresting on an elastic foundation.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114798
|
oai_dc
|
Analytical solutions to magneto-electro-elastic beams
|
Analytical solutions to magneto-electro-elastic beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Aimin Jiang(West Branch of Zhejiang Univ. of Tech.); Haojiang Ding(West Branch of Zhejiang Univ. of Tech.)"
] |
By means of the two-dimensional basic equations of transversely isotropic magneto-electroelastic
media and the strict differential operator theorem, the general solution in the case of distinct
eigenvalues is derived, in which all mechanical, electric and magnetic quantities are expressed in four
harmonic displacement functions. Based on this general solution in the case of distinct eigenvalues, a
series of problems is solved by the trial-and-error method, including magneto-electro-elastic rectangular
beam under uniform tension, electric displacement and magnetic induction, pure shearing and pure
bending, cantilever beam with point force, point charge or point current at free end, and cantilever beam
subjected to uniformly distributed loads. Analytical solutions to various problems are obtained.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000947911
|
oai_dc
|
A non-symmetric non-periodic B3-spline finite strip method
|
A non-symmetric non-periodic B3-spline finite strip method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kyeong-Ho Kim(Chungsuk Eng. Specific); Chang-Koon Choi(KAIST)"
] |
In the earlier application of the spline finite strip method(FSM), the uniform B3-spline
functions were used in the longitudinal direction while the conventional interpolation functions were used
in the transverse direction to construct the displacement filed in a strip. To overcome the shortcoming of
the uniform B3-spline, non-periodic B-spline was developed as the displacement function. The use of nonperiodic
B3-spline function requires no tangential vectors at both ends to interpolate the geometry of shell
and the Kronecker delta property is also satisfied at the end boundaries. Recently, non-periodic spline
FSM which was modified to have a multiple knots at the boundary was developed for the shell analysis
and applied to the analysis of bridges. In the formulation of a non-symmetric spline finite strip method,
the concepts of non-periodic B3-spline and a stress-resultant finite strip with drilling degrees of freedom
for a shell are used. The introduction of non-symmetrically spaced knots in the longitudinal direction
allows the selective local refinement to improve the accuracy of solution at the connections or at the
location of concentrated load. A number of numerical tests were performed to prove the accuracy and
efficiency of the present study.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114841
|
oai_dc
|
Random vibration and deterministic analyses of cable-stayed bridges to asynchronous ground motion
|
Random vibration and deterministic analyses of cable-stayed bridges to asynchronous ground motion
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"K. Soyluk(Gazi University); A.A. Dumanoglu(Grand Nat. Assembly of Turkey); M. E. Tuna(Gazi University)"
] |
In this paper, a comparison of various random vibration and deterministic dynamic analysesof cable-stayed bridges subjected to asynchronous ground motion is presented. Diferent random vibrationmotion wave velocities. As a numerical example the Jindo Bridge located in South Korea is chosen and a413 DOF mathematical model is employed for this bridge. The results obtained from a spectral analysisapproach are compared with those of two random vibration based response spectrum methods and aamplifications depending on the decreasing ground motion wave velocities.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114840
|
oai_dc
|
Non-linear seismic response of a low reinforced concrete structure: modelling by multilayered finite shell elements
|
Non-linear seismic response of a low reinforced concrete structure: modelling by multilayered finite shell elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. F. Semblat(LCPC); A. Aouameur(LCPC); F. J. Ulm(Massachusetts Inst. of Tech.)"
] |
The main purpose of this paper is the numerical analysis of the non-linear seismic response
of a RC building mock-up. The mock-up is subjected to different synthetic horizontal seismic excitations.
The numerical approach is based on a 3D-model involving multilayered shell elements. These elements
are composed of several single-layer membranes with various eccentricities. Bending effects are included
through these eccentricities. Basic equations are first written for a single membrane element with its own
eccentricity and then generalised to the multilayered shell element by superposition. The multilayered shell
is considered as a classical shell element : all information about non-linear constitutive relations are
investigated at the local scale of each layer, whereas balance and kinematics are checked afterwards at
global scale. The non-linear dynamic response of the building is computed with Newmark algorithm. The
numerical dynamic results (blind simulations) are considered in the linear and non linear cases and
compared with experimental results from shaking table tests. Multilayered shell elements are found to be
a promising tool for predictive computations of RC structures behaviour under 3D seismic loadings. This
study was part of the CAMUS International Benchmark.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114796
|
oai_dc
|
Strength enhancement in confined concrte with consideration of flexural flexibilities of ties
|
Strength enhancement in confined concrte with consideration of flexural flexibilities of ties
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. Teerawong(Chulalongkorn University); P. Lukkunaprasit(Chulalongkorn University); T. Senjuntichai(Chulalongkorn University)"
] |
The interaction between concrete core expansion and deformation of perimeter ties has beentied columns. This interaction produces pasive confining pressure to the concrete core. Most existingmodels for determining the response of RC tied columns do not directly account for the influence offlexural stiffness of the ties and the variation of confining stres along the column height. This studyby rectilinear ties with various tie configurations considering directly the influence of flexural flexibility ofthe ties and the variation of confining stres along the vertical direction. The concept of area compatibilityis employed to ensure compatibility of the concrete core and steel hoop in a global sense. The proposedinfluence of tie flexibility, tie configuration and degree of confinement can be well captured.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114752
|
oai_dc
|
Optimization of active vibration control for random intelligent truss structures under non-stationary random excitation
|
Optimization of active vibration control for random intelligent truss structures under non-stationary random excitation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"W. Gao(Xidian University); J. J. Chen(Xidian University); T. B. Hu(Xidian University); N. J. Kessissoglou(The Univ of New South wales); R. B. Randall(The Univ of New South wales)"
] |
The optimization of active bars’ placement and feedback gains of closed loop control system
for random intelligent truss structures under non-stationary random excitation is presented. Firstly, the
optimal mathematical model with the reliability constraints on the mean square value of structural
dynamic displacement and stress response are built based on the maximization of dissipation energy due
to control action. In which not only the randomness of the physics parameters of structural materials,
geometric dimensions and structural damping are considered simultaneously, but also the applied force are
considered as non-stationary random excitation. Then, the numerical characteristics of the stationary
random responses of random intelligent structure are developed. Finally, the rationality and validity of the
presented model are demonstrated by an engineering example and some useful conclusions are obtained.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114797
|
oai_dc
|
Low strengh concrete members externally confined with FRP sheets
|
Low strengh concrete members externally confined with FRP sheets
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Alper Ilki(Istanbul Tech. University); N. Kumbasar(Istanbul Tech. University); Volkan Koc(Istanbul Tech. University)"
] |
In this paper axial loading tests on low strength concrete members, which were confined46 specimens with circular, square and rectangular cros-sections with unconfined concrete compressivestrengths between 6 and 10 MPa were included in the test program. During the tests, a photogrammetricaldeformation measurement technique was also used, as well as conventional measurement techniques. Thespecimens with low strength concrete is evaluated quantitatively, in terms of strength, longitudinal andlateral deformability and energy dissipation. The effects of width/depth ratios and the corner radius of thespecimens with rectangular cross-section on the axial behavior were also examined. It was seen that theeffectiveness of the external confinement with CFRPthe unconfined concrete compressive strength is relatively lower. It was also found that the availableanalytical expressions proposed for normal or high strength concrete confined by CFRP sheets could notpredict the strength and deformability of CFRP confined low strength concrete accurately. Newstrength concrete.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114750
|
oai_dc
|
Solids 3-D with bounded tensile strength under the action of thermal strains. Theoretical aspects and numerical procedures
|
Solids 3-D with bounded tensile strength under the action of thermal strains. Theoretical aspects and numerical procedures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Giovaani Pimpinelli(Politecnico di Bari)"
] |
This paper is devoted to illustrate some numerical procedures to solve the boundaryequations take into account the bounded tensile strength of the material and they are presented in theframework of non-linear elasticity and small strains. The associated equilibrium problem is solvednumerically by means of the finite element method and the numerical techniques, i.e. the Newton-discretized problem. Some numerical examples are illustrated.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115473
|
oai_dc
|
A constitutive model for concrete confined by steel reinforcement and carbon fiber reinforced plastic sheet
|
A constitutive model for concrete confined by steel reinforcement and carbon fiber reinforced plastic sheet
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Yeou-Fong Li(Nat. Taipei Univ. of Tech.); Tsang-Sheng Fang(Nat. Taiwan University)"
] |
In this paper, we modify the L-L model (Li et al. 2003) and extend the application of thismodel to concrete confined by both steel reinforcement and CFRP. Thirty-six concrete cylinders with adimension of 30 60 cm were tested to verify the effectiveness of the proposed model. Theexperimental test results show that different types of steel reinforcement have a great effect on thecompresive strength of concrete cylinders confined by steel reinforcement, but the different types of steelCompared with the stress-strain curves of confined concrete cylinders, we can conclude that the proposedmodel can provide more effective prediction than others models.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000948298
|
oai_dc
|
A high precision shear flexible element for bending analysis of thick/thin triangular plate
|
A high precision shear flexible element for bending analysis of thick/thin triangular plate
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. Halder(B. E. College); P. Das(MCKV); M. C. Manna(B. E. College)"
] |
A high precision shear deformable triangular element has been proposed for bending analysisof triangular plate. The element has twelve nodes at the three sides and four nodes inside the element.the degrees of freedom of the internal nodes through static condensation. Plates having diferent boundaryconditions, side ratios (b/a) and thickness ratios (h/a = 0.001, 0.1 and 0.2) have been analyzed using theused for the analysis. The formulation is made based on first order shear deformation theory. Forvalidation of the present element and formulation few results of thin triangular plate have been comparedwith the analytical solutions. Results for thick plate have been presented as new results.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000948255
|
oai_dc
|
A numerical method for the limit analysis of masonry structures
|
A numerical method for the limit analysis of masonry structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. Degl'Innocenti(ISTI-CNR); C. Padovani(ISTI-CNR)"
] |
The paper presents a numerical method for the limit analysis of structures made of a rigidof the kinematic theorem, which characterizes the collapse multiplier as the minimum of all kinematicallyadmisible multipliers. Subsequently, by using the finite element method, we derive the correspondingdiscrete minimum problem in which the objective function is linear and the inequality constraints areapplied to some examples for which the collapsemultiplier and a collapse mechanism are explicitly known. Lastly, the solution to the minimum problemcalculated via numerical codes for quadratic programing problems, is compared to the exact solution.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000948164
|
oai_dc
|
Dynamic and reliability analysis of stochastic structure system using probabilistic finite element method
|
Dynamic and reliability analysis of stochastic structure system using probabilistic finite element method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"B. Y. Moon(Pusan Nat. University); G. J. Kang(Pusan Nat. University); B. S. Kang(Pusan Nat. University); D. S. Cho(Pusan Nat. University)"
] |
Industrial structure systems may have nonlinearity, and are also sometimes exposed to thedanger of random excitation. This paper proposes a method to analyze response and reliability design of acomplex nonlinear structure system under random excitation. The nonlinear structure system which issubjected to random proces is modeled by finite element method. The nonlinear equations are expandedsequentially using the perturbation theory. Then, the perturbed equations are solved in probabilisticapplications are reviewed in accordance with the nonlinear stochastic problem.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART000948297
|
oai_dc
|
Three-dimensional finite element modeling of a long-span cable-stayed bridge for local stress analysis
|
Three-dimensional finite element modeling of a long-span cable-stayed bridge for local stress analysis
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"C. Lertsima(Thammasat University); T. Chaisomphob(Thammasat University); Eiki Yamaguchi(Kyushu Inst. of Tech.)"
] |
.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115474
|
oai_dc
|
Marguerre shell type secant matrices for the postbuckling analysis of thin, shallow composite shells
|
Marguerre shell type secant matrices for the postbuckling analysis of thin, shallow composite shells
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. A. Jayachandran(CSIR Campus); V. Kalyanaraman(Indian Inst. of Tech.); R. Narayanan(CSIR Campus)"
] |
The postbuckling behaviour of thin shells has fascinated researchers because the theoretical
prediction and their experimental verification are often different. In reality, shell panels possess small
imperfections and these can cause large reduction in static buckling strength. This is more relevant in thin
laminated composite shells. To study the postbuckling behaviour of thin, imperfect laminated composite
shells using finite elements, explicit incremental or secant matrices have been presented in this paper.
These incremental matrices which are derived using Marguerre’s shallow shell theory can be used in
combination with any thin plate/shell finite element (Classical Laminated Plate Theory - CLPT) and can
be easily extended to the First Order Shear deformation Theory (FOST). The advantage of the present
formulation is that it involves no numerical approximation in forming total potential energy of the shell
during large deformations as opposed to earlier approximate formulations published in the literature. The
initial imperfection in shells could be modeled by simply adjusting the ordinate of the shell forms. The
present formulation is very easy to implement in any existing finite element codes. The secant matrices
presented in this paper are shown to be very accurate in tracing the postbuckling behaviour of thin
isotropic and laminated composite shells with general initial imperfections.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114751
|
oai_dc
|
A novel meso-mechanical model for concrete fracture
|
A novel meso-mechanical model for concrete fracture
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"R. Ince(Firat University)"
] |
Concrete is a composite material and at meso-level, may be assumed to be composed of threphases: agregate, mortar-matrix and agregate-matrix interface. It is postulated herein that although non-linear material parameters are generaly used to model this composite structure by finite element method,all three phases are known. For this reason, a novel meso-mechanical approach for concrete fracture whichuses the composite material model with distributed-phase for elastic properties of phases and considers thesize efect according to linear elastic fracture mechanics for strength properties of phases is presented inmaximum grain size of concrete. The model is applied to thre most popular fracture mechanicsaproaches for concrete namely the two-parameter model, the effective crack model and the size effectmodel. It is concluded that the developed model well agrees with considered approaches.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001003202
|
oai_dc
|
An improved interval analysis method for uncertain structures
|
An improved interval analysis method for uncertain structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jie Wu(Nanjing Univ. of Aeronautics and Astronautics); You Qun Zhao(Nanjing Univ. of Aeronautics and Astronautics); Su Huan Chen(Jilin University)"
] |
Based on the improved first order Taylor interval expansion, a new interval analysis methodfirst order Taylor interval expansion, the first order derivative terms of the function are also considered tobe intervals. Combining the improved first order Taylor series expansion and the interval extension offunction, the new interval analysis method is derived. The present method is implemented for acontinuous beam and a frame structure. The numerical results show that the method is more accurate thanthe one based on the conventional first order Taylor expansion.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115440
|
oai_dc
|
Wave passage effect of seismic ground motions on the response of multiply supported structures
|
Wave passage effect of seismic ground motions on the response of multiply supported structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. H. Zhang(Dalian Univ. of Technology); J. H. Lin(Dalian Univ. of Technology); F. W. Williams(City Univ. of Hong Kong); Q. S. Li(City Univ. of Hong Kong)"
] |
Seismic random responses due to the wave passage effect are extensively investigated by using the pseudo excitation method (PEM). Two examples are used. The first is very simple but also veryinformative, while the second is a realistic suspension bridge. Numerical results show that the seismicresponses vary significantly with wave speed, especially for low velocity or large span. Such variationscomponents depend heavily on the seismic wave velocity and the natural frequencies of structures. For thelower natural frequency cases, the dynamic component has significant effects on the dynamic responses ofthe structure, whereas the quasi-static component dominates for higher natural frequencies unless the waveadvisable to select several possible velocity values in the seismic analysis and to choose the mostconservative of the results thus obtained as the basis for design.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001198102
|
oai_dc
|
Experimental studies on seismic behavior of steel coupling beams
|
Experimental studies on seismic behavior of steel coupling beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Wan-Shin Park(Chungnam National Univ.); 윤현도(충남대학교); 정재용(홍익대학교); Yong-Chul Kim(Chungnam National Univ.)"
] |
Hybrid coupled shear walls in tall buildings are known as efficient structural systems toprovide lateral resistance to wind and seismic loads. Multiple hybrid coupled shear wals throughout a tallbuilding should be joined to provide additional coupling action to resist overturning moments caused bystudy, experimental studies on the hybrid coupled shear wal were carried out. The main test variableswere the ratios of coupling beam strength to connection strength. Finally, this paper provides backgroundfor rational design guidelines that include a design model to behave efficiently hybrid coupled shear walls.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115439
|
oai_dc
|
Serviceability reliability analysis of cable-stayed bridges
|
Serviceability reliability analysis of cable-stayed bridges
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jin Cheng(Tongji Univ.); Ru-Cheng Xiao(Tongji Univ.)"
] |
A reliability analysis method is proposed in this paper through a combination of the advantages of the response surface method (RSM), finite element method (FEM), first order reliabilitymethod (FORM) and the importance sampling updating method. The accuracy and efficiency of themethod is demonstrated through several numerical examples. Then the method is used to estimate theserviceability reliability of cable-stayed bridges. Effects of geometric nonlinearity, randomness in loading,with a main span length of 628 m built in China. The results show that the cable sag that is part of thegeometric nonlinearities of cable-stayed bridges has a major effect on the reliability of cable-stayedbridge. Finally, the most influential random variables on the reliability of cable-stayed bridges areidentified by using a sensitivity analysis.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001198101
|
oai_dc
|
Study on structural damping of aluminium using multi-layered and jointed construction
|
Study on structural damping of aluminium using multi-layered and jointed construction
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"B. K. Nanda(National Institute of Technology); A. K. Behera(National Institute of Technology)"
] |
In this work, the mechanism of damping and its theoretical evaluation for layered aluminiumcantilever structures jointed with a number of equispaced connecting bolts under an equal tighteningtorque have been considered. Extensive experiments have been conducted on a number of specimens forcomparison with numerical results. Intensity of interface pressure, its distribution pattern, dynamic slipfrequency and amplitude of excitation are found to play a major role on the damping capacity of suchstructures. It is established that the damping capacity of structures jointed with connecting bolts can beimproved largely with an increase in number of layers maintaining uniform intensity of pressuredistribution at the interfaces. Thus the above principle can be utilized in practice for construction ofthe prime considerations for their design.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114757
|
oai_dc
|
Long-term behavior of segmentally-erected prestressed concrete box-girder bridges
|
Long-term behavior of segmentally-erected prestressed concrete box-girder bridges
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. Hedjazi(Amirkabir Univ.); A. Rahai(Amirkabir Univ.); K. Sennah(Ryerson Univ.)"
] |
A general step-by-step simulation for the time-dependent analysis of segmentally-erectedbalanced-cantilever construction of segmental bridges, including effects of the load history, materialnonlinearity, creep, shrinkage, and aging of concrete and the relaxation of prestressing steel was developedusing ABAQUS software. The models included three-dimensional shell elements to model the box-girdersimulating the construction stages, effects of time-dependent deformations of materials and changes in thestructural system of the bridges. The structural responses during construction and throughout the servicelife were traced. A comparison of the developed computer simulation with available experimental resultsstrains and the redistribution of internal forces were calculated for different examples of bridges, built bythe balanced-cantilever method, over thirty-year duration. Significant time-dependent effects on the bridgedeflections and redistribution of internal forces and streses were observed. The ultimate load caryingultimate load carrying capacity of such bridges decreases with time as a result of time-dependent effects.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114758
|
oai_dc
|
Strength and ductility of biaxially loaded high strength RC short square columns wrapped with GFRP jackets
|
Strength and ductility of biaxially loaded high strength RC short square columns wrapped with GFRP jackets
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"O. A. Hodhod(Cairo Univ.); W. Hassan(HBRC); M. S. Hilal(Cairo Univ.); H. Bahnasawy(HBRC)"
] |
The present study is an experimental investigation into the behaviour of high strength concrete square short columns subjected to biaxial bending moments and strengthened by GFRPlaminates. The main objectives of the study are: to evaluate the improvement in the structuralexternally applied FRP laminates, and to investigate the optimum arrangement and amount of FRPlaminates to achieve potential enhancement in structural performance especially ductility. The parametersconsidered in this study are: number of FRP layers and arrangement of wraps. The load eccentricity ise/t = 0.125 in two perpendicular directions to the columns principal axes, and thewraps are applied in single or double layers (partial or full wrapping). In the present work, test results ofused successfully to enhance the ductility of HSC columns subjected to biaxial bending by 300%.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001003033
|
oai_dc
|
Empirical formulas to estimate cable tension by cable fundamental frequency
|
Empirical formulas to estimate cable tension by cable fundamental frequency
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Wei-Xin Ren(Fuzhou Univ.); Gang Chen(Fuzhou Univ.); Wei-Hua Hu(Fuzhou Univ.)"
] |
The cable tension plays an important role in the construction, assesment and long-termstiffness are included. The engineering implementation of a vibration-based cable tension evaluation ismostly carried out by the simple taut string theory. However, the simple theory may cause unaceptableerors in many aplications since the cable sag and bending stiffness are ignored. From the practical pointsolutions by means of energy method and fiting the exact solutions of cable vibration equations wherethe cable sag and bending stiffness are respectively taken into account, the empirical formulas areproposed in the paper to estimate cable tension based on the cable fundamental frequency only. Theliteratures and with the experimental results caried out on the stay cables in the laboratory. The proposedformulas are straightforward and they are convenient for practical engineers to fast estimate the cabletension by the cable fundamental frequency.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115164
|
oai_dc
|
Application of fractals to study the corroded reinforced concrete beam
|
Application of fractals to study the corroded reinforced concrete beam
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. F. Fan(Dalian Univ. of Technology); J. Zhou(Dalian Univ. of Technology); Z. Q. Hu(Dalian Univ. of Technology)"
] |
This paper is focused on fractal analysis of the surface cracking, a new tool for safetyevaluation of corroded reinforced concrete (RC) beams. Comprehensive experimental investigations,pullout tests to determine bond strength between concrete and rebar were carried out on nine CorrodedReinforced Concrete Beams (CRCB) exposed to an aggressive environment for more than 10 years. Incombination with test results from a previous study on CRCBs fabricated in the laboratory fromaccelerated methods, it is found that, for both types of beams, the surface cracking distributions are fractalcorrosion states based on fractal analysis method. Relationships between the fractal dimension andmechanical properties of corroded concrete, rebar corrosion ratio, and ductility of CRCBs are discussed indetail. It is concluded that the fractal dimension can act as a damage index and can be eficiently used todescribe the corrosion state of CRCBs.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115210
|
oai_dc
|
Evaluation of T-stress for cracks in elastic sheets
|
Evaluation of T-stress for cracks in elastic sheets
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"R. K. L. Su(The Univ. of Hong Kong)"
] |
The T-stress of cracks in elastic sheets is solved by using the fractal finite element method(FFEM). The FEM, which had been developed to determine the stress intensity factors of cracks, is re-applied to evaluate the T-stress which is one of the important fracture parameters. The FFEM combines anexterior finite element model with a localized iner model near the crack tip. The mesh geometry of thethe large numbers of nodal displacements at the inner model near the crack tip to a small set of unknowncoefficients. Numerical examples revealed that the present approach is simple and accurate for calculatingthe T-stresses and the stress intensity factors. Some errors of the T-stress solutions shown in the previousT-stres calculations are presented.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001003032
|
oai_dc
|
Analysis of slope stability based on evaluation of force balance
|
Analysis of slope stability based on evaluation of force balance
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. G. Razdolsky(National Building Research Institute); D. Z. Yankelevsky(National Building Research Institute); Y. S. Karinski(National Building Research Institute)"
] |
The paper presents a new approach for the analysis of slope stability that is based on thenumerical solution of a differential equation, which describes the thrust force distribution within thepotential sliding mas. It is based on the evaluation of the thrust force value at the endpoint of the slipof the sliding mass into slices that are normal to the slip line and the equilibrium diferential equation isobtained as the slice width approaches zero. Opposed to comon iterative limit equilibrium proceduresthe present method is straightforward and gives an estimate of slope stability at the value of the safetythe soil mass above the trial slip line eliminates the possible development of a tensile thrust force in the stable and critical states of the slope. The location of the upper boundary point of the thrust line is determined by the equilibrium of the upper triangular slice. The method can be applied to any smooth shape of a slip line, i.e., to a slip line without break points. An approximation of the slip and thrust lines by quadratic parabolas is used in the numerical examples for a series of slopes.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115165
|
oai_dc
|
Direct determination of influence lines and surfaces by F.E.M.
|
Direct determination of influence lines and surfaces by F.E.M.
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Engin Orakdöen(Technical Univ. of Istanbul); Konuralp Girgin(Technical Univ. of Istanbul)"
] |
In this study, element loading matrices are defined for static aplication of classical Mler-Breslau principle to finite element method. The loading matrices are derived from existing elementand influence surfaces may be easily obtained from structural analysis for the loading matrices derivedfrom governing equations, instead of through introduced unit force or displacement techniques. Analgorithm for a computer program and comparative numerical examples are also presented to illustrate the procedure for determination of influence line and surface ordinates.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115209
|
oai_dc
|
Free vibration analysis of rotating beams with random properties
|
Free vibration analysis of rotating beams with random properties
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. A. A. Hosseini(Tarbiat Modarres Univ.); S. E. Khadem(Tarbiat Modarres Univ.)"
] |
In this paper, free vibration of rotating beam with random properties is studied. The cross-sectional area, elasticity modulus, moment of inertia, shear modulus and density are modeled as randomfields and the rotational speed as a random variable. To study uncertainty, stochastic finite elementmethod based on second order perturbation method is applied. To discretize random fields, the thremethods of midpoint, interpolation and local average are applied and compared. The effects of rotationalspeed, seting angle, random property variances, discretization scheme, number of elements, correlation offirst mode eigenvalue are investigated completely. To determine the significant random properties on thevariation of first mode eigenvalue the sensitivity analysis is performed. The results are studied for bothTimoshenko and Bernoulli-Euler rotating beam. It is shown that the C.O.V. of first mode eigenvalue ofuncorrelated random fields, the correlated case has larger C.O.V. value. Another important result is, wherecorrelation length is smal, the convergence rate is lower and more number of elements are necesary forconvergence of final response.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115211
|
oai_dc
|
Uncertain-parameter sensitivity of earthquake input energy to base-isolated structure
|
Uncertain-parameter sensitivity of earthquake input energy to base-isolated structure
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Izuru Takewaki(Kyoto Univ.)"
] |
The input energy to a base-isolated (BI) building during an earthquake is considered andformulated in the frequency domain. The frequency-domain approach for input energy computation hasthe BI building are derived with respect to uncertain parameters in the base-isolation system. It isdemonstrated that the input energy can be of a compact form via the frequency integration of the productbetween the input component (Fourier amplitude spectrum of aceleration) and the structural modelformulation of earthquake input energy in the frequency domain is esential for deriving the sensitivitiesof the input energy to the BI building with respect to uncertain parameters. The sensitivity expresionsprovide us with information the most unfavorable combination of the uncertain parameters which leads to the maximum energy input.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115212
|
oai_dc
|
The analysis of the plane frames having columns which has principal axes not in the plane of frame
|
The analysis of the plane frames having columns which has principal axes not in the plane of frame
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Esref Unluoglu(Osmangazi Univ.); M. Tacettin Sarioglu(Osmangazi Univ.); Ahmet Topcu(Osmangazi Univ.)"
] |
토목공학
| null |
kci_detailed_000085.xml
|
||||
ART001115120
|
oai_dc
|
An analytical solution of the annular plate on elastic foundation
|
An analytical solution of the annular plate on elastic foundation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"D. G. Pavlou(TEI Halkidas); N. V. Vlachakis(TEI Halkidas); M. G. Pavlou(ERGOSE S.A.)"
] |
A new method for deriving analytical solution of the annular elastic plate on elasticintegral transforms and Besel functions’ properties in the coresponding boundary-value problem. Arepresentative example is studied and the obtained solution is compared with published numerical resultsindicating excellent agreement.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115076
|
oai_dc
|
Nonlinear section model for analysis of RC circular tower structures weakened by openings
|
Nonlinear section model for analysis of RC circular tower structures weakened by openings
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Marek Lechman(Building Research Institute); Andrzej Stachurski(Warsaw Univ. of Technology)"
] |
This paper presents the section model for analysis of RC circular tower structures based on nonlinear material laws. The governing equations for normal strains due to the bending moment and thenormal force are derived in the case when openings are located symetricaly in respect to the bendingdirection. In this approach the additional reinforcement at openings is also taken into account. Theof the minimization of the sums of the second powers of the residuals. For minimization the BFGS quasi-Newton and/or Hoke-Jeeves local minimizers suitably modified are applied to take into account the boxconstraints on variables. The model is verified on the set of data encountered in engineering practice. Thenumerical examples ilustrate the efects of the loading ecentricity and size of the opening on the strainsand stresses in concrete and stel in the cross-sections under consideration. Calculated results indicate thatthe additional reinforcement at the openings increases the resistance capacity of the section by several percent.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001003031
|
oai_dc
|
Green’s functions and boundary element method for a magneto-electro-elastic half-plane
|
Green’s functions and boundary element method for a magneto-electro-elastic half-plane
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Aimin Jiang(Zhejiang Univ.); Haojiang Ding(Zhejiang Univ.)"
] |
토목공학
| null |
kci_detailed_000085.xml
|
||||
ART001003030
|
oai_dc
|
Modal analysis of cracked cantilever composite beams
|
Modal analysis of cracked cantilever composite beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Murat Kisa(Harran Univ.); M. Arif Gurel(Harran Univ.)"
] |
Modal analysis of cracked cantilever composite beams, made of graphite-fibre reinforcedpolyamide, is studied. By using the finite element and component mode synthesis methods, a numericmodel applicable to investigate the vibration of cracked composite beams is developed. In this newapproach, from the crack section, the composite beam separated into two parts coupled by a flexibilitymatrix taking into account the interaction forces. These forces are derived from the fracture mechanicstheory as the inverse of the compliance matrix calculated with the proper stress intensity factors and strainwith a transverse non-propagating open crack, addresing the efects of the location and depth of thecrack, and the volume fraction and orientation of the fibre on the natural frequencies and mode shapes.By means of modal data, the position and dimension of the defect can be found. The results of the studyconfirmed that presented method is suitable for the vibration analysis of cracked cantilever compositebeams. Present technique can be easily extended to composite plates and shells.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115077
|
oai_dc
|
A finite element model for long-term analysis of timber-concrete composite beams
|
A finite element model for long-term analysis of timber-concrete composite beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M. Fragiacomo(Univ. of Trieste)"
] |
The paper presents a finite element model for studying timber-concrete composite beams under long-term loading. Both deformability of connection system and rheological behaviour of concrete,timber and conection are fully considered. The creep of component materials and the influence ofmoisture content on the creep of timber and conection, the so-called “mechano-sorptive” efect, arestep procedure in time, which does not require storing the whole stress history in some points in order toaccount for the creep behaviour. Hence the proposed method is suitable for analyses of composite beamssubjected to complex loading and thermo-hygrometric histories. The possibility to acurately predict thelong-term response is then shown by comparing numerical and experimental results for diferent tests.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115119
|
oai_dc
|
Active control of a flexible structure with time delay
|
Active control of a flexible structure with time delay
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Guo-Ping Cai(Shanghai Jiaotong Univ.); Simon X. Yang(Univ. of Guelph)"
] |
Time delay exists inevitably in active control, which may not only degrade the systemperformance but also render instability to the dynamic system. In this paper, a novel active controller iscontrol method, the diferential equation of the controlled mode with time delay is obtained from thetime-delay system dynamics. Then it is discretized and changed into a first-order diference equationwithout any explicit time delay by augmenting the state variables. The modal controller is derived baseddetermined by minimizing a discrete quadratic performance index. The modal coordinate is extracted fromsensor measurements and the actuator control force is converted from the modal one. Since the time delayis explicitly included throughout the entire controller design without any aproximation, the systemfeasible and effective in active vibration control of dynamic systems with time delay. If the time delay isnot explicitly included in the controller design, instability may occur.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115163
|
oai_dc
|
Numerical study of dynamic buckling for plate and shell structures
|
Numerical study of dynamic buckling for plate and shell structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Z. S. Liu(Institute of High Performance Computing); H. P. Lee(Institute of High Performance Computing); C. Lu(Institute of High Performance Computing)"
] |
A numerical approach combining the finite element method with two diferent stabilitycriteria namely the Budiansky and the phase-plane buckling criteria is used to study the dynamic bucklingphenomena of plate and shel structures subjected to sudden applied loading. In the finite element analysisanalysis. The dynamic responses of the plate and shell structures have ben investigated for diferentvalues of the plate and shell imperfection factors. The results indicate that the dynamic buckling time,which is normaly considered in predicting elasto-plastic buckling behavior, should be taken intoselecting proper control variables and incorporating them with two dynamic buckling criteria, the uniquedynamic buckling load can be obtained and the problems of ambiguity and contradiction of dynamicbuckling load of plate and shel structure can be resolved.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115121
|
oai_dc
|
Mode III fracture analysis of piezoelectric materials by Trefftz BEM
|
Mode III fracture analysis of piezoelectric materials by Trefftz BEM
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Qing-Hua Qin(Australian National Univ.)"
] |
Applications of the Trefftz boundary element method (BEM) to anti-plane electroelasticproblems are presented in this paper. Both direct and indirect methods with domain decomposition arediscussed in details. Each crack is treated as semi-infinite thin slit defined in a subregion, for which astres intensity factors defined at each crack tip can be directly computed from the coefficients of theparticular solution. The performance of the proposed formulation is asesed by two examples andcomparison is made with results obtained by other aproaches. The Trefftz boundary element aproach is demonstrated to be suitable for the analysis of the anti-plane problem of piezoelectric materials.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001001032
|
oai_dc
|
Dynamic stability of a viscoelastically supported sandwich beam
|
Dynamic stability of a viscoelastically supported sandwich beam
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ranajay Ghosh(Cornell University); Sanjay Dharmavaram(Indian Institute of Technology); Kumar Ray(Indian Institute of Technology); P. Dash(A.T. - Bidyadharpur Sasam)"
] |
The parametric dynamic stability of an asymetric sandwich beam with viscoelastic core onviscoelastic supports at the ends and subjected to an axial pulsating load is investigated. A set of Hillsequations are obtained from the non-dimensional equations of motion by the application of the generalGalerkin method. The zones of parametric instability are obtained using Saito-Otomi conditions. Theeffects of shear parameter, support characteristics, various geometric parameters and excitation force onthe zones of instability are investigated.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114843
|
oai_dc
|
Control of free vibration with piezoelectric materials: Finite element modeling based on Timoshenko beam theory
|
Control of free vibration with piezoelectric materials: Finite element modeling based on Timoshenko beam theory
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Myung-Kwan Song(The University of Tokyo); Hyuk-Chun Noh(Columbia University); Sun-Hoon Kim(Youngdong University); In-Seon Han(Korea Advanced Institute of Science and Technology)"
] |
In this study, a new smart beam finite element is proposed for the finite element modeling of beam-type smart structures that are equipped with bonded plate-type piezoelectric sensors and actuators.Constitutive equations for the direct piezoelectric efect and converse piezoelectric effect of piezoelectricthe smart beam finite element are derived. The proposed 2-node beam finite element is an isoparametricelement based on Timoshenko beam theory. The proposed smart beam finite element is applied to the freevibration control adopting ain deriving an equation of motion, is the control force equivalent to that in existing literature. Validity ofthe proposed element is shown through comparing the analytical results of the verification examples withthose of other previous researchers. With the use of smart beam finite elements, simulation of freevibration control is demonstrated by sensing the voltage of the piezoelectric sensors and by applying thevoltages to the piezoelectric actuators.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114886
|
oai_dc
|
Size effect in concrete blocks under local pressure
|
Size effect in concrete blocks under local pressure
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"R. Ince(Firat University); E. Arici(Firat University)"
] |
Numerous tests on concrete structure members under local pressure demonstrated that thecompresive strength of concrete at the loaded surface is increased by the confinement effect provided bythe enveloping concrete. Even though most design codes propose specific criteria for preventing bearingfailure, they do not take into consideration size effect which is an important phenomenon in the fracturethree different depths (size range = 1:4) and two diferent height/depth ratios of 2 and 3 are tested underconcentrated load. Ultimate loads obtained from the test results are analysed by means of the modifiedsize effect law (MSEL). Then, a prediction formula, which considers effect of both depth and height onliterature. It is concluded that the observed size effect is in good agreement with the MSEL.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001001033
|
oai_dc
|
Exact natural frequencies of structures consisting of two-part beam-mass systems
|
Exact natural frequencies of structures consisting of two-part beam-mass systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"H. Su(City University); J. R. Banerjee(City University)"
] |
Using two diferent, but related approaches, an exact dynamic stifness matrix for a two-partbeam-mass system is developed from the free vibration theory of a Bernoulli-Euler beam. The firstapproach is based on matrix transformation while the second one is a direct approach in which thekinematical conditions at the interfaces of the two-part beam-mass system are satisfied. Both proceduresallow an exact free vibration analysis of structures such as a plane or a space frame, consisting of one orstructural member consisting of two diferent beam segments between which there is a rigid mass elementthat may have rotatory inertia. Numerical checks to show that the two methods generate identical dynamicstiffnes matrices were performed for a wide range of frequency values. Once the dynamic stiffnessthe natural frequencies of some frameworks consisting of two-part beam-mass systems. Numerical resultsare discussed and the paper concludes with some remarks.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114931
|
oai_dc
|
Experimental investigation of local damage in high strength concrete columns using a shaking table
|
Experimental investigation of local damage in high strength concrete columns using a shaking table
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Rogerio Bairrao(National Laboratory for Civil Engineering); Rimantas Kaianauskas(Vilnius Gediminas Technical University); Romualdas Kliukas(Vilnius Gediminas Technical University)"
] |
In this paper the accumulation of local damage during the cyclic loading in reinforced high-strength concrete columns is experimentally investigated. Two identical column specimens with annularconstant vertical concentrated force and a time-dependent concentrated horizontal force, were carried outat the LNEC shaking tables facility. Sine type signals, controlled in amplitude, frequency and timeduration were used for these experiments. The concept of local damage based on local stiffnessand reinforced in such a way that the accumulation of damage was predicted by dominating deformations(cracking and crushing of the concrete) while the increasing of the loading values was a dominating factorof damage. It was observed that the local damage of HSC columns has exposed their anisotropic localcontinuum damage concept, and a partial random character was observed.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114844
|
oai_dc
|
Numerical study on the influence of mesomechanical properties on macroscopic fracture of concrete
|
Numerical study on the influence of mesomechanical properties on macroscopic fracture of concrete
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"W. C. Zhu(Northeastern University); C. A. Tang(Northeastern University); S. Y. Wang(Northeastern University)"
] |
The numerical simulations on the influence of mesoscopic structures on the macroscopicstrength and fracture characteristics are carried out based on that the concrete is assumed to be a thre-phase composite composed of matrix (mortar), aggregate and bond between them by using a numericalcode named MFPA. The finite element program is employed as the basic stres analysis tool when themaximum tensile strain criterion and Mohr-Coulomb criterion are utilized as damage threshold. It can befound from the numerical results that the bond between matrix and aggregate has a significant effect onthe macroscopic mechanical performance of concrete.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114885
|
oai_dc
|
HDQ-FD integrated methodology for nonlinear static and dynamic response of doubly curved shallow shells
|
HDQ-FD integrated methodology for nonlinear static and dynamic response of doubly curved shallow shells
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Omer Civalek(Akdeniz University); Mehmet Ulker(Firat University)"
] |
The non-linear static and dynamic response of doubly curved thin isotropic shells has beenstudied for the step and sinusoidal loadings. Dynamic analogues Von Karman-Donnel type shell equationsare used. Clamped immovable and simply supported immovable boundary conditions are considered. Thegoverning nonlinear partial diferential equations of the shell are discretized in space and time domainsusing the harmonic diferential quadrature (HDQ) and finite differences (FD) methods, respectively. Theaccuracy of the proposed HDQ-FD coupled methodology is demonstrated by the numerical examples. Numerical examples demonstrate the satisfactory accuracy, efficiency and versatility of the presented approach.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001114753
|
oai_dc
|
Influence of loading condition and reinforcement size on the concrete/reinforcement bond strength
|
Influence of loading condition and reinforcement size on the concrete/reinforcement bond strength
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kazim Turk(Firat University); Sinan Caliskan(University of Dundee); M. Sukru Yildirim(Trakya University)"
] |
The paper reports on a study of bond strength between reduced-water-content concrete andtensile reinforcement in spliced mode. Three diferent diameters (12, 16 and 22 mm) of tensile steel werediameter of reinforcement, a total of nine beams (190 270 180 mm) were tested, of which threbeams were with no axial force (positive bending) and the other six beams were with axial force(combined bending). The splice length was selected so that bars would fail in bond, splitting the concretecover in the splice region, before reaching the yield point. It was found that there was a considerable sizeeffect in the experimental results, i.e., as the diameter of the reinforcement reduced the bond strength andthe deflection recorded at the midspan increased significantly, whilst the stiffness of the beams reduced. Ittested in combined bending than that of the beams tested in positive bending only.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115436
|
oai_dc
|
Hot spot stress approach for Tsing Ma Bridge fatigue evaluation under traffic using finite element method
|
Hot spot stress approach for Tsing Ma Bridge fatigue evaluation under traffic using finite element method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"T. H. T. Chan(The Hong Kong Polytechnic University); T. Q. Zhou(Southeast University); Z. X. Li(Southeast University); L. Guo(Southeast University)"
] |
The hot spot stres approach is usually adopted in the fatigue design and analysis of tubularwelded joints. To apply the hot spot stres approach for fatigue evaluation of long span suspensionbridges, the FEM is used to determine the hot spot stres of critical fatigue location. Using the local finiteelement models of the Tsing Ma Bridge, typical joints are developed and the stres concentration factorsare determined. As a case for study, the calculated stres concentration factor is combined with thenominal representative stress block cycle to obtain the representative hot spot stress range cycle blockunder traffic loading from online health monitoringstres approach and the hot spot stress approach for fatigue life evaluation of the Tsing Ma Bridge. Thecomparison result shows that the nominal stress approach cannot consider the most critical stress of thefatigue damage location and the hot spot stress approach is more appropriate for fatigue evaluation.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001000808
|
oai_dc
|
Fatigue reliability analysis of steel bridge welding member by fracture mechanics method
|
Fatigue reliability analysis of steel bridge welding member by fracture mechanics method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"박연수(전남대학교); Suk-Yeol Han(Chonnam National University); Byoung-Chul Suh(Chonnam National University)"
] |
This paper attempts to develop the analytical model of estimating the fatigue damage using alinear elastic fracture mechanics method. The stress history on a welding member, when a truck passedexplain the influence of a load on a structure. This study undertook an analysis of the stress rangefrequency considering both dead load stres and crack opening stres. A probability method applied tostres range frequency distribution and the probability distribution parameters of it was obtained byvariants (stress range) output failure block loadings. The probability distribution of failure block loadingswas acquired by Maximum likelihood Method and Determinant. This can calculate the fatigue reliabilitypreventing the fatigue failure of a welding member. The failure block loading divided by the averagethe welding member of the bottom flange of a cross beam and the vertical stiffener of a steel box bridgeby the proposed model. Results showed that the primary factor effecting failure time was crack openingstres. It was important to decide the crack opening stres for using the proposed model. Also according to the 50% reliability and 90%, 99.9% failure times were indicated.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001000807
|
oai_dc
|
Shell forms for egg-shaped concrete sludge digesters: A comparative study on structural efficiency
|
Shell forms for egg-shaped concrete sludge digesters: A comparative study on structural efficiency
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. Zingoni(University of Cape Town)"
] |
The structural feasibility of a variety of non-conventional sludge digesters, in the form ofthin shells of revolution constructed in concrete, has formed the subject of investigation of a recent?egg-shaped and the advantages of these over conventional digesters of the wide-cylindrical type arenow well-recognised: superior mixing efficiency, less accumulation of deposits at the bottom, easierremoval of bottom deposits and surface crust, reduced heat losses, and so forth. With the aim of exploringavailable usable analytical data and practical guidelines for the design of such thin shell structures, anumber of theoretical studies have recently been undertaken, and these have covered conical assemblies,spherical assemblies and parabolic ogival configurations. The purpose of the present paper is to bringfindings in each case, draw comparisons among the various studied configurations with regard tostructural efficiency and functional suitability, and make appropriate conclusions and recommendations.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115438
|
oai_dc
|
The MIN-N family of pure-displacement, triangular, Mindlin plate elements
|
The MIN-N family of pure-displacement, triangular, Mindlin plate elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. Jane Liu(Tennessee Technological University); H. R. Riggs(University of Hawaii at Manoa)"
] |
In recent years the pure displacement formulation for plate elements has not been as popularas other formulations. We revisit the pure displacement formulation for shear-deformable plate elementsand propose a family of N-node, displacement-compatible, fully-integrated, pure-displacement, triangular,N. The development has been motivated by the relative simplicity of thepure displacement formulation and by the success of the existing 3-node plate element, MIN3. Theformulation of MIN3 is generalized to obtain the MIN-N family, which possesses complete, fulydegree higher than those for rotations. General element-level formulas for the thin-limit Kirchhoffconstraints are developed. The 6-node, 18 degree-of-freedom element MIN6, with cubic displacement andquadratic rotations, is implemented and tested extensively. Numerical results show that MIN6 exhibitsin the linear, elastic regime. The results illustratethat the fully-integrated MIN6 element has excellent performance in the thin limit, even for coarsemeshes, and that it does not require shear relaxation.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115437
|
oai_dc
|
An analytical solution for finitely long hollow cylinder subjected to torsional impact
|
An analytical solution for finitely long hollow cylinder subjected to torsional impact
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"X. Wang(Shanghai Jiaotong University); X. Y. Wang(Shanghai Jiaotong University); W. H. Hao(Shanghai Jiaotong University)"
] |
An analytical method is presented to solve the elastodynamic problem of finitely long hollowcylinder subjected to torsional impact often occurs composed of a solution of quasi-static equation satisfied with the non-homogeneous boundary conditionand a solution of dynamic equation satisfied with homogeneous boundary condition. The quasi-static solutionis obtained directly by solving the quasi-static equation satisfied with the non-homogeneous boundarytransform on the radial variable, r, Laplace transform on time variable, t, and finite Fourier transform onaxial variable, z. Thus, the solution for finitely long, holow cylinder subjected to torsion impact isobtained. In the calculating examples, the response histlong hollow cylinder subjected to an exponential decay torsion load are obtained, and the results havebeen analyzed and discussed. Finally, a dynamic finite element for the same problem is carried out byusing ABAQUS finite element analysis. Comparing the analytical solution with the finite element solution,Therefore, it is further concluded that the analytical method and computing process presented in the paperare effective and accurate.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115393
|
oai_dc
|
Analysis of the in-plane shear behaviour of FRP reinforced hollow brick masonry walls
|
Analysis of the in-plane shear behaviour of FRP reinforced hollow brick masonry walls
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. Gabor(Laboratoire Mécanique Matériaux Structures (L2MS)); E. Ferrier(Laboratoire Mécanique Matériaux Structures (L2MS)); E. Jacquelin(Laboratoire Mécanique Matériaux Structures (L2MS)); P. Hamelin(Laboratoire Mécanique Matériaux Structures (L2MS))"
] |
This paper presents an experimental as well as a numerical analysis of the in-plane shearbehaviour of holow, 870 840 10 mm masonry wals, externaly strengthened with FRP composites.The experimental approach is devoted to the evaluation of the effectiveness of diferent compositeThe numerical study asseses the stres and strain state distribution in the unreinforced and strengthenedpanels using a commercial finite element code. The effect of FRP reinforcement on the masonrybehaviour and the capability of modelling to forecast a representative failure mode of the unreinforced and reinforced masonry walls is investigated.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115348
|
oai_dc
|
Numerical study of stress states near construction joint in two-plate-girder bridge with cast-in-place PC slab
|
Numerical study of stress states near construction joint in two-plate-girder bridge with cast-in-place PC slab
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Eiki Yamaguchi(Kyushu Institute of Technology); Fumio Fukushi(Japan Steel Tower Co. Ltd.); Naoki Hirayama(Kyushu Institute of Technology); Takemi Kubo(Japan Steel Tower Co. Ltd.); Yoshinobu Kubo(Kyushu Institute of Technology)"
] |
For reducing construction cost, two-plate-girder bridges are getting popular in Japan. Thistype of bridge employs a PC slab, which is often cast-in-place. In such a case, concrete is not usually castover the whole slab at one time: some portions are constructed earlier than the rest. Therefore, ain concrete slab. High tensile stres can be expected near the construction joint where concretes withdiferent ages meet. Moreover, prestressing is not applied over the whole length of slab at one time. Thismay also serve as a source of tensile stress in the slab. Thus there is a chance that cast-in-place PC slab,states near the construction joint in the cast-in-place PC slab of a two-plate-girder bridge are investigatednumerically. The finite element method is employed and the three-dimensional analysis is conducted tosee the influence of dry shrinkage and prestresing. The stres states in the PC slab thus obtained arediscussed. The simplified model of a plate girder for this clas of analysis is also proposed.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001001493
|
oai_dc
|
Effects of strain hardening of steel reinforcement on flexural strength and ductility of concrete beams
|
Effects of strain hardening of steel reinforcement on flexural strength and ductility of concrete beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. C. M. Ho(The University of Hong Kong); F. T. K. Au(The University of Hong Kong); A. K. H. Kwan(The University of Hong Kong)"
] |
In the design of reinforced concrete beams, it is a standard practice to use the yield stress ofthe steel reinforcement for the evaluation of the flexural strength. However, because of strain hardening,a comon belief that the actual flexural strength should be higher than the theoretical flexural strengthevaluated with strain hardening ignored. The posible increase in flexural strength due to strain hardeningis a two-edge sword. In some cases, it may be treated as strength reserve contributing to extra safety. Ingreater capacity of the beam causing violation of the strong column-weak beam design philosophy. Strainhardening may also have certain effect on the flexural ductility. In this paper, the effects of strainhardening on the post-peak flexural behaviour, particularly the flexural strength and ductility, of reinforcedhardening could be quite significant when the tension stel ratio is relatively small.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115392
|
oai_dc
|
Effect of varying the size of flatbar stiffeners on the buckling behaviour of thin cylinders on local supports
|
Effect of varying the size of flatbar stiffeners on the buckling behaviour of thin cylinders on local supports
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Wesley Vanlaere(Ghent University); Rudy Van Impe(Ghent University); Guy Lagae(Ghent University); Thomas Maes(Ghent University)"
] |
A steel silo traditionally consists of a cylindrical and a conical shell. In order to facilitate emptying operations, the cylinder is placed on local supports. This may lead to dangerous stressconcentrations and eventually to local instability of the cylindrical wall. In this contribution, the locallysuported cylinder is strengthened by means of ring stiffeners and longitudinal stiffeners and the effect ofthem representing the effect of one of the dimensions on the buckling stress. In each diagram, the failurepattern corresponding to the buckling stres is indicated.
|
토목공학
| null |
kci_detailed_000085.xml
|
|||
ART001115347
|
oai_dc
|
Nonlinear analysis using load-displacement control
|
Nonlinear analysis using load-displacement control
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Young-Doo Kwon(Kyungpook National University); Hyun-Wook Kwon(Kyungpook National University); Beom-Soo Lim(Agency for Defense Development)"
] |
A new load/displacement parameter method is proposed for the simultaneous control ofapplied loads and structural displacements at one or more points. The procedure is based on a generalizedRiks method, which utilizes load/displacement parameters as scaling factors to analyze post-bucklingphenomena including snap-through or snap-back. The convergence characteristics are improved by employingnew relaxation factors through an incremental displacement parameter, particularly in a region that exhibits severe numerical instability. The improved performance is illustrated by means of a numerical example.
|
토목공학
| null |
kci_detailed_000086.xml
|
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