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|---|---|---|---|---|---|---|---|---|---|---|---|---|
ART001470738
|
oai_dc
|
Seismic response control of a building complex utilizing passive friction damper: Analytical study
|
Seismic response control of a building complex utilizing passive friction damper: Analytical study
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"C. L. Ng(The Hong Kong Polytechnic University); Y. L. Xu(The Hong Kong Polytechnic University)"
] |
Control of structural response due to seismic excitation in a manner of coupling adjacent buildings has been actively developed, and most attention focused on those buildings of similar height. However, with the rapid development of some modern cities, multi-story buildings constructed with an
auxiliary low-rise podium structure to provide extra functions to the complex become a growing construction scheme. Being inspired by the positively examined coupling control approach for buildings with similar height, this paper aims to provide a comprehensive analytical study on control effectiveness of using friction dampers to link the two buildings with significant height difference to supplement the recent experimental investigation carried out by the writers. The analytical model of a coupled building system is first developed with passive friction dampers being modeled as Coulomb friction. To highlight potential advantage of coupling the main building and podium structure with control devices that provide
a lower degree of coupling, the inherent demerit of rigid-coupled configuration is then evaluated. Extensive parametric studies are finally performed. The concerned parameters influencing the design of optimal friction force and control efficiency include variety of earthquake excitation and differences in
floor mass, story number as well as number of dampers installed between the two buildings. In general, the feasibility of interaction control approach applied to the complex structure for vibration reduction due to seismic excitation is supported by positive results.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470721
|
oai_dc
|
Virtual boundary element−equivalent collocation method for the plane magnetoelectroelastic solids
|
Virtual boundary element−equivalent collocation method for the plane magnetoelectroelastic solids
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Wei-An Yao(Dalian University of Technology); Xiao-Chuan Li(Dalian University of Technology); Gui-Rong Yu(Shenyang Institute of Aeronautical Engineering)"
] |
This paper presents a virtual boundary element-equivalent collocation method (VBEM) for the plane magnetoelectroelastic solids, which is based on the fundamental solutions of the plane magnetoelectroelastic solids and the basic idea of the virtual boundary element method for elasticity. Besides all the advantages of the conventional boundary element method (BEM) over domain
discretization methods, this method avoids the computation of singular integral on the boundary by introducing the virtual boundary. In the end, several numerical examples are performed to demonstrate the performance of this method, and the results show that they agree well with the exact solutions. So the method is one of the efficient numerical methods used to analyze megnatoelectroelastic solids.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470724
|
oai_dc
|
The uniaxial strain test - a simple method for the characterization of porous materials
|
The uniaxial strain test - a simple method for the characterization of porous materials
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"T. Fiedler(University of Aveiro); A. Öchsner(University of Aveiro); J. Grácio(University of Aveiro)"
] |
The application of cellular materials in load-carrying and security-relevant structures requires the exact prediction of their mechanical behavior, which necessitates the development of robust simulation models and techniques based on appropriate experimental procedures. The determination of the yield
surface requires experiments under multi-axial stress states because the yield behavior is sensitive to the hydrostatic stress and simple uniaxial tests aim only to determine one single point of the yield surface. Therefore, an experimental technique based on a uniaxial strain test for the description of the influence of the hydrostatic stress on the yield condition in the elastic-plastic transition zone at small strains is proposed and numerically investigated. Furthermore, this experimental technique enables the determination of a second elastic constant, e.g., Poisson’s ratio.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470730
|
oai_dc
|
Concrete beams submitted to various moisture environments
|
Concrete beams submitted to various moisture environments
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. Multon(Laboratoire Matériaux et Durabilité des Constructions); J-F. Seignol(Laboratoire Central des Ponts et Chaussées); F. Toutlemonde(Laboratoire Central des Ponts et Chaussées)"
] |
This paper deals with the effects of various moisture environments on the structural behavior of concrete beams. The presented results were obtained within a large experimental program carried out at the Laboratoire Central des Ponts et Chaussées (LCPC), with Electricité de France (EDF) as a partner.
The aim of this paper is to point out and to quantify the strains resulting from unidirectional moisture conditions: a drying gradient applied during 14 months, followed by the re-wetting of the dried surface during 9 months. The effect of reinforcement on the shrinkage and on the deformation due to water
absorption is pointed out. Moreover, a lot of tests on companion cylinders and prisms were carried out to determine the mechanical characteristics of the material and help checking analysis methods. The paper focuses on numerous measurements obtained during the 23 months on one plain concrete beam and one reinforced concrete beam: variation of water content, followed by precise weighing and gammadensitometry, relative humidity measurements, local and global deformations in the three directions and deflection of the
beams. Thus, the effects of drying and water absorption on the behavior of concrete structures are documented and analyzed in comparison with existing representation of water diffusion.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470741
|
oai_dc
|
Numerical methods for the dynamic analysis of masonry structures
|
Numerical methods for the dynamic analysis of masonry structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Silvia Degl’Innocenti(Istituto di Scienza e Tecnologie dell’Informazione “A. Faedo”); Cristina Padovani(Istituto di Scienza e Tecnologie dell’Informazione “A. Faedo”); Giuseppe Pasquinelli(Istituto di Scienza e Tecnologie dell’Informazione “A. Faedo”)"
] |
The paper deals with the numerical solution of the dynamic problem of masonry structures. Masonry is modelled as a non-linear elastic material with zero tensile strength and infinite compressive strength. Due to the non-linearity of the adopted constitutive equation, the equations of the motion must
be integrated directly. In particular, we apply the Newmark or the Hilber-Hughes-Taylor methods implemented in code NOSA to perform the time integration of the system of ordinary differential equations obtained from discretising the structure into finite elements. Moreover, with the aim of
evaluating the effectiveness of these two methods, some dynamic problems, whose explicit solutions are known, have been solved numerically. Comparisons between the exact solutions and the corresponding
approximate solutions obtained via the Newmark and Hilber-Hughes-Taylor methods show that in the cases under consideration both numerical methods yield satisfactory results.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470768
|
oai_dc
|
Frictional effects on the cyclic response of laterally loaded timber fasteners
|
Frictional effects on the cyclic response of laterally loaded timber fasteners
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Nii Allotey(The University of Western Ontario); Ricardo Foschi(The University of British Columbia)"
] |
Foschi’s connector model is used as a basic component in the development of nonlinear analysis programs for timber structures. This paper presents the extension of the model to include the effect of shaft frictional forces. The wood medium is modeled using the Foschi embedment model, while shaft friction is modeled using an elastic Coulomb-type friction model. The initial confining pressure for the case of driven fasteners is accounted for by a lateral shift of the load-embedment curve. The model is used to compute the cyclic response of both driven and inserted fasteners. The results obtained from the
cases studied indicate that initial confining pressure and friction do not have a significant effect on the computed hysteretic response, however, they significantly affect the computed amount of fastener withdrawal. This model is particularly well-suited for modeling the hysteretic response of shear walls with moderate fastener withdrawal under lateral cyclic or earthquake loading.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470774
|
oai_dc
|
Wave scattering among a large number of floating cylinders
|
Wave scattering among a large number of floating cylinders
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Masashi Kashiwagi(Masashi Kashiwagi)"
] |
When a large number of identical cylinders are placed in an array with equal separation distance, near-resonant phenomena may occur between cylinders at critical frequencies, and cause large wave forces on each element of the array. In this paper, 64 truncated circular cylinders arranged in 4 rows
and 16 columns are considered to check occurrence of near-resonant phenomena and performance of theoretical predictions based on the potential flow. Experiments are conducted in head waves to measure the wave elevation along the longitudinal centerline of the model, and measured results are compared with numerical ones. Attention is focused on the spatial variation of the wave amplitude around the first neartrapped-mode frequency.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470775
|
oai_dc
|
Stress intensity factors for periodic edge cracks in a semi-infinite medium with distributed eigenstrain
|
Stress intensity factors for periodic edge cracks in a semi-infinite medium with distributed eigenstrain
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. M. Afsar(Bangladesh University of Engineering and Technology); S. R. Ahmed(Bangladesh University of Engineering and Technology)"
] |
This study analyzes stress intensity factors for a number of periodic edge cracks in a semiinfinite medium subjected to a far field uniform applied load along with a distribution of eigenstrain. The eigenstrain is considered to be distributed arbitrarily over a region of finite depth extending from the free
surface. The cracks are represented by a continuous distribution of edge dislocations. Using the complex potential functions of the edge dislocations, a simple as well as effective method is developed to calculate the stress intensity factor for the edge cracks. The method is employed to obtain the numerical results of the stress intensity factor for different distributions of eigenstrain. Moreover, the effect of crack spacing and the intensity of the normalized eigenstress on the stress intensity factor are investigated in details. The results of the present study reveal that the stress intensity factor of the periodic edge cracks is significantly influenced by the magnitude as well as distribution of the eigenstrain within the finite depth. The eigenstrains that induce compressive stresses at and near the free surface of the semi-infinite medium reduce the stress intensity factor that, in turn, contributes to the toughening of the material.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470771
|
oai_dc
|
Free vibration and elastic analysis of shear-deformable non-symmetric thin-walled curved beams: A centroid-shear center formulation
|
Free vibration and elastic analysis of shear-deformable non-symmetric thin-walled curved beams: A centroid-shear center formulation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"김남일(세종대학교); Moon-Young Kim(Sungkyunkwan University)"
] |
An improved shear deformable thin-walled curved beam theory to overcome the drawback of currently available beam theories is newly proposed for the spatially coupled free vibration and elastic analysis. For this, the displacement field considering the shear deformation effects is presented by
introducing displacement parameters defined at the centroid and shear center axes. Next the elastic strain and kinetic energies considering the shear effects due to the shear forces and the restrained warping torsion are rigorously derived. Then the equilibrium equations are consistently derived for curved beams with non-symmetric thin-walled sections. It should be noticed that this formulation can be easily reduced to the warping-free beam theory by simply putting the sectional properties associated with warping to zero
for curved beams with L- or T-shaped sections. Finally in order to illustrate the validity and the accuracy of this study, finite element solutions using the isoparametric curved beam elements are presented and compared with those in available references and ABAQUS’s shell elements.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470772
|
oai_dc
|
A study on pushover analyses of reinforced concrete columns
|
A study on pushover analyses of reinforced concrete columns
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Yu-Chi Sung(National Taipei University of Technology); Kuang-Yen Liu(National Taiwan University); Chin-Kuo Su(National Taipei University of Technology); I-Chau Tsai(National Taiwan University); Kuo-Chun Chang(National Taiwan University)"
] |
This paper proposes a realistic approach to pushover analyses of reinforced concrete (RC) structures with single column type and frame type. The characteristic of plastic hinge of a single RC column subjected to fixed axial load was determined first according to column’s three distinct failure
modes which were often observed in the experiments or earthquakes. By using the determined characteristic of plastic hinge, the pushover analyses of single RC columns were performed and the analytical results were investigated to be significantly consistent with those of cyclic loading tests.
Furthermore, a simplified methodology considering the effect of the variation of axial force for each RC column of the frame structure during pushover process is proposed for the first time. It would be helpful in performing pushover analysis for the structures examined in this study with efficiency as well as accuracy.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470776
|
oai_dc
|
Incorporating nonstructural finish effects and construction quality in a performance-based framework for wood shearwall design
|
Incorporating nonstructural finish effects and construction quality in a performance-based framework for wood shearwall design
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jun Hee Kim(Lochsa Engineering, Inc.); David V. Rosowsky(Texas A&M University)"
] |
This paper presents results from a study to extend a performance-based shearwall selection procedure to take into account the contributions of nonstructural finish materials (such as stucco and gypsum wallboard), construction quality issues, and their effects on the displacement performance of engineered wood shearwalls subject to seismic loading. Shearwall performance is evaluated in terms of peak displacements under seismic loading (characterized by a suite of ordinary ground motion records)
considering different combinations of performance levels (drift limits) and seismic hazard. Shearwalls are analyzed using nonlinear dynamic time-history analysis with global assembly hysteretic parameters determined by fitting to actual shearwall test data. Peak displacement distributions, determined from sets of analyses using each of the ground motion records taken to characterize the seismic hazard, are postprocessed into performance curves, design charts, and fragility curves which can be used for risk-based design and assessment applications.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470777
|
oai_dc
|
Seismic evaluation of fluid-elevated tank-foundation/soil systems in frequency domain
|
Seismic evaluation of fluid-elevated tank-foundation/soil systems in frequency domain
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"R. Livaoglu(Karadeniz Technical University); A. Dogangun(Karadeniz Technical University)"
] |
An efficient methodology is presented to evaluate the seismic behavior of a Fluid-Elevated Tank-Foundation/Soil system taking the embedment effects into accounts. The frequency-dependent cone model is used for considering the elevated tank-foundation/soil interaction and the equivalent spring-mass
model given in the Eurocode-8 is used for fluid-elevated tank interaction. Both models are combined to obtain the seismic response of the systems considering the sloshing effects of the fluid and frequencydependent
properties of soil. The analysis is carried out in the frequency domain with a modal analysis procedure. The presented methodology with less computational efforts takes account of; the soil and fluid interactions, the material and radiation damping effects of the elastic half-space, and the embedment effects. Some conclusions may be summarized as follows; the sloshing response is not practically affected by the change of properties in stiff soil such as S1 and S2 and embedment but affected in soft soil. On
the other hand, these responses are not affected by embedment in stiff soils but affected in soft soils.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470764
|
oai_dc
|
Infilled frames: developments in the evaluation of cyclic behaviour under lateral loads
|
Infilled frames: developments in the evaluation of cyclic behaviour under lateral loads
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"L. Cavaleri(Università di Palermo); M. Fossetti(Università di Palermo); M. Papia(Università di Palermo)"
] |
In order to consider the modified seismic response of framed structures in the presence of masonry infills, proper models have to be formulated. Because of the complexity of the problem, a careful definition of an equivalent diagonal pin-jointed strut, able to represent the horizontal forceinterstorey displacement cyclic law of the actual infill, may be a solution. In this connection the present
paper, continuing a previous work in which a generalised criterion for the determination of the ideal cross-section of the equivalent strut was formulated, analizes some models known in literature for the prediction of the lateral cyclic behaviour discussing their field of validity. As a support of the discussion, the results of an experimental investigation involving single story-single bay infilled reinforced concrete. Frames under vertical and lateral loads with different kind of infill (actually not yet so much investigated) are presented. Finally, an improvement of a model known in the literature is proposed, taking the results of the experimental tests before mentioned into account.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470757
|
oai_dc
|
Frequency domain analysis of concrete arch dams by decoupled modal approach
|
Frequency domain analysis of concrete arch dams by decoupled modal approach
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Vahid Lotfi(Amirkabir University)"
] |
A modal approach is proposed for dynamic analysis of concrete arch dam-reservoir systems in frequency domain. The technique relies on mode shapes extracted by considering the symmetric parts of total mass and stiffness matrices. Based on this method, a previously developed program is modified,
and the response of Morrow Point arch dam is studied for various conditions. The method is proved to be very effective and it is an extremely convenient modal technique for dynamic analysis of concrete arch dams.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470751
|
oai_dc
|
Experimental study on the deformation characteristics of RC beam-column subassemblages
|
Experimental study on the deformation characteristics of RC beam-column subassemblages
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Zixiong Guo(Huaqiao University); Yong Yang(Huaqiao University)"
] |
Cyclic loading tests were carried out on six half-scale reinforced concrete beam-column subassemblages designed to the current Chinese Seismic Design Code for Buildings. The deformation behavior and restoring force characteristics of the subassemblages were studied. Emphasis was directed on their seismic behavior and deformation components. Based on test data and a simplified analysis model of the global and local deformation, the contribution of the deformation components due to beam flexure, column flexure, joint shear, and slippage of longitudinal reinforcement in the joint to the global deformation of subassemblages at different displacement amplitudes of cyclic loading was investigated.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470762
|
oai_dc
|
A method for effective beam widths of slabs in flat plate structures under gravity and lateral loads
|
A method for effective beam widths of slabs in flat plate structures under gravity and lateral loads
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jung-Wook Choi(University of Alberta); Jin-Gyu Song(Chonnam National University)"
] |
Effective beam width models are commonly used to obtain the lateral stiffness of flat plate structures. In these models, an effective beam width is defined as the width when the flexural stiffness of the beam element equals the slab stiffness. In this present study, a method to obtain effective beam widths
that considers the effects of connection geometry and slab cracking is analytically proposed. The rectangularity of the vertical member for the connection geometry and the combined effects of creep and shrinkage for the slab cracking are considered. The results from the proposed method are compared with experimental results from a test structure having nine slab-column connections.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470755
|
oai_dc
|
Effects of plate slenderness on the ultimate strength behaviour of foam supported steel plate elements
|
Effects of plate slenderness on the ultimate strength behaviour of foam supported steel plate elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Narayan Pokharel(Queensland University of Technology); Mahen Mahendran(Queensland University of Technology)"
] |
Plate elements in fully profiled sandwich panels are generally subjected to local buckling failure modes and this behaviour is treated in design by using the conventional effective width method for plates with a width to thickness (b/t) ratio less than 100. If the plate elements are very slender (b/t >1000), the panel failure is governed by wrinkling instead of local buckling and the strength is determined by the flexural wrinkling formula. The plate elements in fully profiled sandwich panels do not fail by wrinkling as their b/t ratio is generally in the range of 100 to 600. For this plate slenderness region, it
was found that the current effective width formula overestimates the strength of the fully profiled sandwich panels whereas the wrinkling formula underestimates it. Hence a new effective width design equation has been developed for practical plate slenderness values. However, no guidelines exist to identify the plate slenderness (b/t) limits defining the local buckling, wrinkling and the intermediate regions so that appropriate design rules can be used based on plate slenderness ratios. A research study was therefore conducted using experimental and numerical studies to investigate the effect of plate slenderness ratio on the ultimate strength behaviour of foam supported steel plate elements. This paper presents the details of the study and the results.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470748
|
oai_dc
|
Load deformation characteristics of shallow suspension footbridge with reverse profiled pre-tensioned cables
|
Load deformation characteristics of shallow suspension footbridge with reverse profiled pre-tensioned cables
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ming-Hui Huang(Queensland University of Technology); David P. Thambiratnam(Queensland University of Technology); Nimal J. Perera(Bird & Marshall Ltd)"
] |
Cable supported structures offer an elegant and economical solution for bridging over long spans with resultant low material content and ease of construction. In this paper, a model of shallow cable supported footbridge with reverse profiled pre-tensioned cables is treated and its load deformation
characteristics under different quasi-static loads are investigated. Effects of important parameters such as cable sag and pre-tension are also studied. Numerical results performed on a 3D model show that structural stiffness of this bridge (model) depends not only on the cable sag and cross sectional areas of the cables, but also on the pre-tension in the reverse profiled cables. The tension in the top supporting cables can be adjusted to a high level by the pre-tension in the reverse profiled bottom cables, with the
total horizontal force in the bridge structure remaining reasonably constant. It is also evident that pretensioned horizontally profiled cables can greatly increase the lateral horizontal stiffness and suppress the lateral horizontal deflection induced by eccentric vertical loads.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001470759
|
oai_dc
|
An effective finite element approach for soil-structure analysis in the time-domain
|
An effective finite element approach for soil-structure analysis in the time-domain
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"L. Lehmann(Technical University of Braunschweig)"
] |
In this study, a complete analysis of soil-structure interaction problems is presented which includes a modelling of the near surrounding of the building (near-field) and a special description of the wave propagation process in larger distances (far-field). In order to reduce the computational effort which
can be very high for time domain analysis of wave propagation problems, a special approach based on similarity transformation of the infinite domain on the near-field/far-field interface is applied for the wave radiation of the far-field. The near-field is discretised with standard Finite Elements, which also allows to introduce non-linear material behaviour. In this paper, a new approach to calculate the involved convolution integrals is presented. This approximation in time leads to a dramatically reduced computational effort for long simulation times, while the accuracy of the method is not affected. Finally,
some benchmark examples are presented, which are compared to a coupled Finite Element/Boundary Element approach. The results are in excellent agreement with those of the coupled Finite Element/Boundary Element procedure, while the accuracy is not reduced. Furthermore, the presented approach is easy to incorporate in any Finite Element code, so the practical relevance is high.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001197684
|
oai_dc
|
Design procedure for modal controllers for defective and nearly defectie systems
|
Design procedure for modal controllers for defective and nearly defectie systems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"YuDongChen(Jilin University); SuHuanChen(Jilin University); GuangYang(Changchun University of Technology)"
] |
This paper presents a procedure for designing feedback controllers for defective systems withrepeated eigenvalues, and also for a nearly defective system with close eigenvalues. For the nearlydefective system, we first transform it into a defective one, and then apply the same method to deal withthe nearly defective system. A method for computing the gain matrices is discussed here. The methodologiesproposed are based on the modal coordinate equation to avoid the tedious mathematical manipulation. Asan application of the present procedure, a numerical example is given.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000911809
|
oai_dc
|
Enhancement of the bucklign strength of glass beams by means of lateral restraints
|
Enhancement of the bucklign strength of glass beams by means of lateral restraints
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J.Belis(Ghent University); R.VanImpe(Ghent University); G.Lagae(Ghent University); W.Vanlaere(Ghent University)"
] |
New material applications and transparency are desired by contemporary architects. Its superbtransparency and high strength make glass a very suitable building material -in spite of its brittlenes-even for primary load bearing structures. Currently we will focus on load bearing glass beams, subjectedto different loading types. Since glass beams have a very slender, rectangular cross section, they aresensitive to lateral torsional buckling. Glass beams fail under a critical buckling load at streses that liefar below the theoretical simple bending strength, due to the complex combination of torsion and out-of-plane bending, which characterises the instability phenomenon. The critical load can be increasedconsiderably by preventing the upper rim from moving out of the beams plane. Diferent boundaryconditions are examined for diferent loading types. The load carrying capacity of glass beams can beincreased three times and more using relatively simple, cheap lateral restraints.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000911815
|
oai_dc
|
Comparison of error estimation methods and adaptivity for plane stress/ strain problems
|
Comparison of error estimation methods and adaptivity for plane stress/ strain problems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"MustafaOzakca(University of Gaziantep)"
] |
This paper deals with adaptive finite element analysis of linearly elastic structures usingdiferent error estimators based on flux projection (or best guess stress values) and residual methods.Presentations are given on a typical h-type adaptive analysis, a mesh refinement scheme and the couplingof adaptive finite element analysis with automatic mesh generation. Details about diferent error estimatorsare provided and their performance, reliability and convergence are studied using six node quadratictriangular elements. Several examples are presented to demonstrate the reliability of diferent errorestimators.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000911813
|
oai_dc
|
A boundary radial point interpolation method (BRPIM) for 2-D structural analyses
|
A boundary radial point interpolation method (BRPIM) for 2-D structural analyses
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y.T.Gu(National University of Singapore); G.R.Liu(National University of Singapore)"
] |
In this paper, a boundary-type meshfree method, the boundary radial point interpolation method(BRPIM), is presented for solving boundary value problems of two-dimensional solid mechanics. In theBRPIM, the boundary of a problem domain is represented by a set of properly scattered nodes. A techniqueis proposed to construct shape functions using radial functions as basis functions. The shape functions soformulated are proven to possess both delta function property and partitions of unity property. Boundaryconditions can be easily implemented as in the conventional Boundary Element Method (BEM). TheBoundary Integral Equation (BIE) for 2-D elastostatics is discretized using the radial basis point interpolation.Some important parameters on the performance of the BRPIM are investigated thoroughly. Validity andefficiency of the present BRPIM are demonstrated through a number of numerical examples.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001197685
|
oai_dc
|
Adaptive finite elements by Delaunay triangulation for fracture analysis of cracks
|
Adaptive finite elements by Delaunay triangulation for fracture analysis of cracks
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"PramoteDechaumphai(Chulalongkom University); SutthisakPhongthanapanich(Chulalongkom University); ParitudBhandhubanyoung(National Metal and Materials Technology Center)"
] |
Delaunay triangulation is combined with an adaptive finite element method for analysis oftwo-dimensional crack propagation problems. The content includes detailed descriptions of the proposedprocedure which consists of the Delaunay triangulation algorithm and an adaptive remeshing technique.The adaptive remeshing technique generates small elements around the crack tips and large elements inthe other regions. Three examples for predicting the stress intensity factors of a center cracked plate, acompact tension specimen, a single edge cracked plate under mixed-mode loading, and an example forsimulating crack growth behavior in a single edge cracked plate with holes, are used to evaluate theeffectiveness of the procedure. These examples demonstrate that the proposed procedure can improvesolution accuracy as well as reduce total number of unknowns and computational time.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000911811
|
oai_dc
|
Inelastic seismic response of adjacent buildings linked by fluid dampers
|
Inelastic seismic response of adjacent buildings linked by fluid dampers
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y.L.Xu(Hong Kong Polytechnic University); Z.Yang(Hong Kong Polytechnic University); X.L.Lu(Tongji University)"
] |
Using fluid dampers to connect adjacent buildings for enhancing their seismic resistantperformance has been recently investigated but limited to linear elastic adjacent buildings only. This paperpresents a study of inelastic seismic response of adjacent buildings linked by fluid dampers. A nonlinearfinite element planar model using plastic beam element is first constructed to simulate two steel framesconnected by fluid dampers. Computed linear elastic seismic responses of the two steel frames with andwithout fluid dampers under moderate seismic events are then compared with the experimental resultsobtained from shaking table tests. Finally, elastic-plastic seismic responses of the two steel frames withand without fluid dampers are extensively computed, and the fluid damper performance on controllinginelastic seismic response of the two steel frames is assesed. The effects of the fundamental frequencyratio and structural damping ratio of the two steel frames on the damper performance are also examined.The results show that not only in linear elastic stage but also in inelastic stage, the seismic resistantperformance of the two steel frames of diferent fundamental frequencies can be significantly enhanced ifthey are properly linked by fluid dampers of appropriate parameters.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000909445
|
oai_dc
|
A new bridge-vehicle system Part II : Parametric study
|
A new bridge-vehicle system Part II : Parametric study
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"TommyH.T.Chan(Polytechnic University); LingYu(Yangtze River Scientific Research Institute); T.H.Yung(T.Y.Lin); JeffreyH.F.Chan(Wong and Ouyang)"
] |
The formulation of a new bridge-vehicle system using shell with eccentric beam elementshas been introduced in a companion paper (Part I). The new system takes into account of the contributionof the twisting and pitching modes of vehicles to the bridge responses. It can also be used to study thedynamic transverse load distribution of a bridge. This paper presents a parametric study on the impactinduced by one vehicle or multi-vehicle runing across a bridge using the proposed model. Severalparameters were considered as variables including the mass ratio, the speed parameter, the frequency ratioand the axle spacing parameter to investigate their effects on the impact factor. A total number of 189cases were carried out in this parametric study. Within the realistic range of vehicle considered, themaximum impact factors could be 2.24, 1.78 and 1.49 for bridges with spans 10 m, 20 m and 30 mrespectively.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000907791
|
oai_dc
|
A spatial displacement model for horizontally curved beams
|
A spatial displacement model for horizontally curved beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Z.G.Jiang(National University of Defense Science and Technology); Q.Z.Luo(University of Foshan); J.Tang(University of Hong Kong)"
] |
A new approach to the analysis of horizontally curved beams is presented in this paper. Theproposed method simplifies a two-dimensional structure into a one-dimensional structure just like anormal beam for structural analysis and, therefore, reduces the computational effort significantly.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001195663
|
oai_dc
|
Adaptive mesh generation by bubble packing method
|
Adaptive mesh generation by bubble packing method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jeong-HunKim(Korea Advanced Institute of Science and Technology); Hyun-GyuKim(Korea Advanced Institute of Science and Technology); Byung-ChaiLee(Korea Advanced Institute of Science and Technology); 임세영(Korea Advanced Institute of Science and Technology)"
] |
The bubble packing method is implemented for adaptive mesh generation in two and thredimensions. Bubbles on the boundary of a three-dimensional domain are controlled independently of theinterior bubbles in the domain, and a modified octree technique is employed to place initial bubbles in thethree-dimensional zone. Numerical comparisons are made with other mesh generation techniques todemonstrate the effectiveness of the present bubble packing scheme for two- and three-dimensionaldomains. It is shown that this bubble packing method provides a high quality of mesh and affordablecontrol of mesh density as well.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000909452
|
oai_dc
|
New design concept and damage assessment of large-scale cooling towers
|
New design concept and damage assessment of large-scale cooling towers
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Sam-YoungNoh(Institute for Structural Statics and Dynamics RWTH Aachen); KonstantinMeskouris(Institute for Structural Statics and Dynamics RWTH Aachen); ReinhardHarte(Bergische Universitat); WilfriedB.Kratzig(Ruhr-Universitat)"
] |
The motivation of this paper is to introduce the modern technology of large-scale coolingtower design. Thereby the innovative design concept for the worlds largest cooling tower with a height of200 m is briefly presented (Harte & Krzig 2002, Bush et al. 2002). The new concept was considerednot only for safety, but also for preservation of the durability of the structure, because cracking damage inlarge cooling towers in general cause extremely high cost of maintenance and repair. The paperdemonstrates numerically the damage process in large cooling towers (Krtzig et al. 2001), and describessome basics of the numerical finite element approach for damage propagation modelling of shell structure.A prototype is analysed to trace the progressive damage process, whereby the changes in the dynamicalbehaviour of the structure, as mirrored in its natural frequencies and the corresponding mode shapes, arepresented and discussed. Finally, the example shows that such damage processes develop progressivelyover the life-time of the shell structure.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001195661
|
oai_dc
|
Development of triangular flat-shell element using new thin-thick plate bending element based on semiLoof constrains
|
Development of triangular flat-shell element using new thin-thick plate bending element based on semiLoof constrains
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Young-LiangChen(Tsinghua Uiversity); SongCen(Tsinghua University); Zhen-HanYao(Thinghua University); Yu-QiuLong(Tsinghua University); Zhi-FeiLong(China University)"
] |
A new simple 3-node triangular flat-shell element with standard nodal DOF (6 DOF pernode) is proposed for the linear and geometrically nonlinear analysis of very thin to thick plate and shelstructures. The formulation of element GT9 (Long and Xu 1994), a generalized conforming membraneelement with rigid rotational freedoms, is employed as the membrane component of the new shelelement. Both one-point reduced integration scheme and a corresponding stabilization matrix are adoptedfor avoiding membrane locking and hourglass phenomenon. The bending component of the new elementcomes from a new generalized conforming Kirchhoff-Mindlin plate element TSL-T9, which is derived inthis paper based on semiLoof constrains and rational shear interpolation. Thus the convergence can beguaranteed and no shear locking will happen. Furthermore, a simple hybrid procedure is suggested toimprove the stress solutions, and the Updated Lagrangian formulae are also established for thegeometrically nonlinear problems. Numerical results with solutions, which are solved by some other recentelement models and the models in the commercial finite element software ABAQUS, are presented. Theyshow that the proposed element, denoted as GMST18, exhibits excellent and better performance for theanalysis of thin-think plates and shells in both linear and geometrically nonlinear problems.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000909457
|
oai_dc
|
Effect of shear deformation on the critical buckling of multi-step bars
|
Effect of shear deformation on the critical buckling of multi-step bars
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Q.S.Li(City University)"
] |
The governing differential equation for buckling of a one-step bar with the effect of sheardeformation is established and its exact solution is obtained. Then, the exact solution is used to derive theeigenvalue equation of a multi-step bar. The new exact approach combining the transfer matrix methodand the closed form solution of one step bar is presented. The proposed methods is convenient for solvingthe entire and partial buckling of one-step and multi-step bars with various end conditions, with orwithout shear deformation effect, subjected to concentrated axial loads. A numerical example is givenexplaining the proposed procedure and investigating the effect of shear deformation on the criticalbuckling force of a multi-step bar.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000909448
|
oai_dc
|
Optimum design of prestressed concrete beams by a modified grid search method
|
Optimum design of prestressed concrete beams by a modified grid search method
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"IsmailH.Cagatay(Cukurova University); CengizDundar(Cukurova University); OrhanAksogan(Cukurova University)"
] |
A computer program has been developed for the optimum design of prestressed concretebeams under flexure. Optimum values of prestressing force, tendon configuration, and cross-sectionaldimensions are determined subject to constraints on the design variables and streses. 28 constraints havebeen used including flexural stresses, cover requirement, the aspect ratios for top and bottom flanges andweb part of a beam and ultimate moment. The objective function contains cost of concrete, prestressingforce and formwork. Using this function, it is posible to obtain minimum cost design, minimum weightor cross-sectional area of concrete design and minimum prestressing force design. Besides the idealized I-shaped cross-section, which is widely used in literature, a general I-shaped cross-section with eightgeometrical design variables are used here. Four examples, one of which is available in the literature andthe others are modified form of it, have been solved for minimum cost and minimum cross-sectional areadesigns and the results are compared. The computer program, which employs modified grid searchoptimization method, can assist a designer in producing efficient designs rapidly and easily. Considerablesavings in computational work are thus made possible.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001195662
|
oai_dc
|
Ambient vibration measurements and finite element modelling for the Hong Kong Ting Kau Bridge
|
Ambient vibration measurements and finite element modelling for the Hong Kong Ting Kau Bridge
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"F.T.K.Au(University of Hong Kong); L.G.Tham(University of Hong Kong); P.K.K.Lee(University of Hong Kong); C.Su(South China University of Technology); D.J.Han(South China University of Technology); Q.S.Yan(South China University of Technology); K.Y.Wong(Highways Department)"
] |
The Ting Kau Bridge in Hong Kong is a cable-stayed bridge comprising two main spans andtwo side spans. The bridge deck is supported by three towers, an end pier and an abutment. Each of thethree towers consists of a single reinforced concrete mast which reduces its section in steps, and it isstrengthened by transverse cables and struts in the transverse vertical plane. The bridge deck is supportedby four inclined planes of cables emanating from anchorages at the tower tops. In view of the threat fromtyphoons, the dynamic behaviour of long-span cable-supported bridges in the region is always animportant consideration in their design. This paper is devoted to the ambient vibration measurements ofthe bridge for evaluation of dynamic characteristics including the natural frequencies and mode shapes. Italso describes the modelling of the bridge. A few finite element models are developed and calibrated tomatch with the field data and the results of subsequent structural health monitoring of the bridge.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000909440
|
oai_dc
|
A new bridge-vehicle system part I : Formulation and validation
|
A new bridge-vehicle system part I : Formulation and validation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"TommyH.T.Chan(Polytechnic University); LingYu(Yangtze River Scientific Research Institute); T.H.Yung(T.Y.Lin); JeffreyH.F.Chan(Wong and Ouyang)"
] |
This paper presents the formulation of a new bridge-vehicle system with validation using thefield data. Both pitching and twisting modes of the vehicle are considered in the contribution of thedynamic effects in the bridge responses. A heavy vehicle was hired as a control vehicle with known axleweight, axle spacing and spring coefficients. The measured responses were generated from the controlvehicle runing at a particular speed at a test span at Ma Tau Wai Flyover. The measured responses wereacquired using strain gauges installed beneath the girder beams of the test bridge. The simulated responseswere generated using BRVEAN that is a self-developed program based on the proposed bridge-vehiclesystem. The validation shows that the bridge model is valid for representing the test bridge and thegoverning equations are valid for representing the motion of moving vehicles.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000947969
|
oai_dc
|
Highway bridge live loading assessment and load carrying capacity estimation using a health monitoring system
|
Highway bridge live loading assessment and load carrying capacity estimation using a health monitoring system
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Pilate Moyo(Univ. of Cape Town); J. M. W. Brownjohn(Univ. of Plymouth); Piotr Omenzetter(Univ. of Auckland)"
] |
The Land Transport Authority of Singapore has a continuing program of highway bridge
upgrading, to refurbish and strengthen bridges to allow for increasing vehicle traffic and increasing axle
loads. One subject of this program has been a short span bridge taking a busy highway across a coastal
inlet near a major port facility. Experiment-based structural assessments of the bridge were conducted
before and after upgrading works including strengthening. Each assessment exercise comprised two
separate components; a strain and acceleration monitoring exercise lasting approximately one month, and
a full-scale dynamic test carried out in a single day. This paper reports the application of extreme value
statistics to estimate bridge live loads using strain measurements.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001115019
|
oai_dc
|
A trilinear stress-strain model for confined concrete
|
A trilinear stress-strain model for confined concrete
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Alper Iiki(Istanbul Tech. Univ.); Nahit Kumbasar(Istanbul Tech. Univ.); Pinar Ozdemir(Istanbul Tech. Univ.); Toshibumi Fukuta(Building Res. Inst.)"
] |
For reaching large inelastic deformations without a substantial loss in strength, the potentialplastic hinge regions of the reinforced concrete structural members should be confined by adequateneeded for inelastic analysis of reinforced concrete structures. In this study, a trilinear stres-strain modelis proposed for the axial behaviour of confined concrete. The model is based on experimental work thatand strain hardening of the longitudinal reinforcement are also taken into account. The proposed model isused for predicting the stres-strain relationships of confined concrete specimens tested by otherresearchers. Although the proposed model is simpler than most of the available models, the comparisonsbetween the predicted results and experimental data indicate that it can represent the stres-strainrelationship of confined concrete quite realistically.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000947964
|
oai_dc
|
Assumed strain finite strip method using the non-periodic B-spline
|
Assumed strain finite strip method using the non-periodic B-spline
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Hyun-Seok Hong(Chungsuk Engineering); Kyeong Ho Kim(Chungsuk Engineering); Chang-Koon Choi(KAIST)"
] |
An asumed strain finite strip method(FSM) using the non-periodic B-spline for a shell ispresented. In the present method, the shape function based on the non-periodic B-splines satisfies theKronecker delta properties at the boundaries and allows to introduce interior supports in much the sameshell is defined by non-periodic B3-splines without any tangential vectors at the ends and the penaltyfunction method is used to incorporate the drilling degres of fredom. In this study, new assumed strainfields using the non-periodic B-spline function are proposed to overcome the locking problems. The stripformulated in this way does not posses any spurious zero energy modes. The versatility and accuracy ofthe new approach are demonstrated through a series of numerical examples.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001115160
|
oai_dc
|
Modeling of cyclic joint shear deformation contributions in RC beam-column connections to overall frame behavior
|
Modeling of cyclic joint shear deformation contributions in RC beam-column connections to overall frame behavior
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"신명수(Morehead State University); J. M. LaFave(Univ. of Illinois)"
] |
In seismic analysis of moment-resisting frames, beam-column connections are often modeledwith rigid joint zones. However, it has been demonstrated that, in ductile reinforced concrete (RC) moment-resisting frames designed based on current codes (to say nothing of older non-ductile frames), the joint zonesTherefore, the rigid joint assumption may result in misinterpretation of the global performancecharacteristics of frames and could consequently lead to miscalculation of strength and ductility demands onconstituent frame members. The primary objective of this paper is to propose a rational method forframe analysis. The authors tested four RC edge beam-column-slab connection subassemblies subjected toearthquake-type lateral loading; hysteretic joint shear behavior is investigated based on these tests and otherlaboratory tests reported in the literature. An analytical scheme employing the modified compression fieldmodel capable of explicitly considering hysteretic joint shear behavior is then formulated for nonlinearstructural analysis. In the model, a joint is represented by rigid elements located along the joint edges andnonlinear rotational springs embedded in one of the four hinges linking adjacent rigid elements. Theconnection model is able to well represent the experimedisplacement response of connection subasemblies.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001115117
|
oai_dc
|
Non-linear rheology of tension structural element under single and variable loading history Part II: creep of steel rope - examples and parametrical study
|
Non-linear rheology of tension structural element under single and variable loading history Part II: creep of steel rope - examples and parametrical study
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. Kmet(Tech. Univ. of Kosice); L. Holickova(Tech. Univ. of Kosice)"
] |
The substance of the use of the derived non-linear creep constitutive equations under variable
stress levels (see first part of the paper, Kmet 2004) is explained and the strategy of their application is
outlined using the results of one-step creep tests of the steel spiral strand rope as an example. In order to
investigate the creep strain increments of cables an experimental set-up was originally designed and a
series of tests were carried out. Attention is turned to the individual main steps in the production and
application procedure, i.e., to the one-step creep tests, definition of loading history, determination of the
kernel functions, selection and definition of constitutive equation and to the comparison of the resulting
values considering the product and the additive forms of the approximation of the kernel functions. To
this purpose, the parametrical study is performed and the results are presented. The constitutive equations
of non-linear creep of cable under variable stress history offer a strong tool for the real simulation of
stochastic variable load history and prediction of realistic time-dependent response (current deflection and
stress configuration) of structures with cable elements. By means of suitable stress combination and its
gradual repeating various loads and times effects can be modelled.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001115161
|
oai_dc
|
Micro-mechanical modeling for compressive behaivor of concrete material
|
Micro-mechanical modeling for compressive behaivor of concrete material
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"P. Haleeratttanawattana(Chulalongkorn University); T. Senjuntichai(Chulalongkorn University); E. Limsuwan(Chulalongkorn University)"
] |
This paper presents the micro-mechanical modeling for predicting concrete behavior under
compressive loading. The model is able to represent the heterogeneities in the microstructure up to three
phases, i.e., aggregate particles, matrix and interfaces. The smeared crack concept based on non-linear
fracture mechanics is implemented in order to formulate the constitutive relation for each component. The
splitting tensile strength is considered as a fracture criterion for cracking in micro-level. The finite
element method is employed to simulate the model based on plane stress condition by using quadratic
triangular elements. The validation of the model is verified by comparing with the experimental results.
The influence of tensile strength from both aggregate and matrix phases on the concrete compressive
strength is demonstrated. In addition, a guideline on selecting appropriate tensile strength for each phase
to obtain specified concrete compressive strength is also presented.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001115074
|
oai_dc
|
Non-linear rheology of tension structural element under single and variable loading history Part I: Theoretical derivations
|
Non-linear rheology of tension structural element under single and variable loading history Part I: Theoretical derivations
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. Kmet(Tech. Univ. of Kosice)"
] |
The present paper concerns the macroscopic overall description of rheologic properties forsteel wire and synthetic fibre cables under variable loading actions according to non-linear creep and/orrelaxation theory. The general constitutive equations of non-linear creep and/or relaxation of tensionelements - cables under one-step and the variable stress or strain inputs using the product and two typesof additive approximations of the kernel functions are presented in the paper. The derived non-linearhistory using the kernel functions determined only by one-step constant creep or relaxation tests. Thedeveloped constitutive equations enable to simulate and to predict in a general way non-linear rheologicbehaviour of the cables under an arbitrary loading or straining history. The derived constitutive equationscan be used for the various tension structural elements with the non-linear rheologic properties underuniaxial variable stresing or straining.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001115118
|
oai_dc
|
Endochronic simulation for viscoplastic collapse of long, thick-walled tubes subjected to external pressure and axial tension
|
Endochronic simulation for viscoplastic collapse of long, thick-walled tubes subjected to external pressure and axial tension
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kuo-Long Lee(Far East College); Kao-Hua Chang(Nat. Cheng Kung Univ.)"
] |
In this study, the endochronic theory was used to investigate the collapse of thick-walled
tubes subjected to external pressure and axial tension. The experimental and theoretical findings of
Madhavan et al. (1993) for thick-walled tubes of 304 stainless steel subjected to external pressure and
axial tension were compared with the endochronic simulation. Collapse envelopes for various diameter-tothickness
tubes under two different pressure-tension loadings were involved. It has been shown that the
experimental results were aptly described by the endochronic approach demonstrated from comparison
with the theoretical prediction employed by Madhavan et al. (1993). Furthermore, by using the ratesensitivity
function of the intrinsic time measure proposed by Pan and Chern (1997) in the endochronic
theory, our theoretical analysis was extended to investigate the viscoplastic collapse of thick-walled tubes
subjected to external pressure and axial tension. It was found that the pressure-tension collapse envelopes
are strongly influenced by the strain-rate during axial tension. Due to the hardening of the metal tube of
304 stainless steel under a faster strain-rate during uniaxial tension, the size of the tension-collapse
envelope increases.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001197681
|
oai_dc
|
Dynamic plastic response of a hinged-free beam subjected to impact at an arbitrary location along its span
|
Dynamic plastic response of a hinged-free beam subjected to impact at an arbitrary location along its span
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. Zhang(Beijing University of Aeronautics and Astronautics); J.L.Yang(Beijing University of Aeronautics and Astronautics); Y.L.Hua(China Agricultural University)"
] |
In this paper, a complete solution is presented for dynamic plastic response of a rigid,perfectly plastic hinged-free beam, of which one end is simply supported or hinged and the other endfre, subjected to a transverse strike by a travelling mass at an arbitrary location along its span. Thegoverning diferential equations are expressed in non-dimensional forms and solved numerically to obtainthe instantaneous deflection of the beam and the plastic dissipated energy in the beam. The dynamicbehavior for a hinged-free beam is more complicated than that of a free-free beam. It transpires that themass ratio and impact position have significant influence on the final deformation. In the aspect of energydisipation, unlike simply suported or clamped beams for which the plastic deformation consumes almostthe total input energy, a considerable portion of the input energy would be transferred as rigid-bodymotion of hinged-free beam, and the energy dissipated in its plastic deformation is greatly reduced.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874730
|
oai_dc
|
Design and ultimate behavior of RC plates and shells:two case studies
|
Design and ultimate behavior of RC plates and shells:two case studies
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Chang-Shik Min(Dongguk University)"
] |
토목공학
| null |
kci_detailed_000083.xml
|
||||
ART000874884
|
oai_dc
|
A new quadrilateral 5-node non-conforming membraneelement with drilling DOF
|
A new quadrilateral 5-node non-conforming membraneelement with drilling DOF
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Tae-Yeo lLee(Korea Advanced Institute of Science and Technology); Chang-KoonChoi(Korea Advanced Institute of Science and Technology)"
] |
In this paper, a new quadrilateral 5-node non-conforming membrane element with drillingdegrees of freedom is presented. The main advantage of these elements is the relatively small number ofintegration points to evaluate a stiffness matrix comparing to the existing transition membrane elements(CLM elements). Moreover, the presented elements pass the patch test by virtue of the DirectModification Method incorporated into the element formulation. The presented 5-node elements areproved to be very efficient when used in the local mesh refinement for the in-plane structures which havestress concentrations. And some numerical studies also show the good performance of the new elementdeveloped in this study.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855375
|
oai_dc
|
Free vibration analysis of Reissner plates by mixed finite element
|
Free vibration analysis of Reissner plates by mixed finite element
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Nihal Eratli(Istanbul Technical University); A.Yal？inAk？z(Istanbul Technical University)"
] |
In this study, free vibration analysis of Reissner plates on Pasternak foundation is carried outby mixed finite element method based on the Geaux differential. New boundary conditions areestablished for plates on Pasternak foundation. This method is developed and applied to numerousproblems by Ak and his co-workers. In dynamic analysis, the problem reduces to the solution of astandard eigenvalue problem and the mixed element is based upon a consistent mass matrix formulation.The element has four nodes and bending and torsional moments, transverse shear forces, rotations anddisplacements are the basic unknowns. The element performance is assessed by comparison withnumerical examples known from literature. Validity limits of Kirchhoff plate theory is tested by dynamicanalysis. Shear locking effects are tested as far as h/2a=10-6 and it is observed that REC32 is free fromshear locking.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855556
|
oai_dc
|
Connections of sleeve joint purlin system
|
Connections of sleeve joint purlin system
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S.H.Tan(Nanyang Technological University); L.K.Seah(Nanyang Technological University); Y.Li(Nanyang Technological University)"
] |
This paper presents the findings of an investigation carried out to determine the mostappropriate connections, in terms of rotational stiffnes, to use for the optimum design of cold-formed Zedsection sleeve joint purlin system. Experiments and parametric studies were conducted to investigate theeffects of geometric variables on the behavior of the sleeve-purlin and cleat-purlin connections of thesleeve joint purlin system. The variables considered were purlin size and thickness, sleeve size, thickness,length and bolt position. The test results were used to verify the empirical expressions, developed herein,employed to determine the rotational stiffness of connections. With the predicted connection stiffness, themost suitable sleve-purlin and cleat-purlin connections can be selected so as to produce an optimumcondition for the sleeve joint purlin system.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855377
|
oai_dc
|
Effect of cylinder diameter and boat tail angle on the free vibration characteristics of a typical payload fairing
|
Effect of cylinder diameter and boat tail angle on the free vibration characteristics of a typical payload fairing
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"V.Ramamurti(Indian Institute of Technology); S.Rajarajan(Vikram Sarabhai Space Centre); G.VenkateswaraRao(Vikram Sarabhai Space Centre)"
] |
Three noded plate and shell finite element and 3D beam element in conjunction withLanczos method are used for studying the effect of boat tail angle on the free vibration characteristics ofa typical payload fairing for three different cylinder diameters with height to diameter ratio 1.5.Configurations without boat tail structural member are also studied. One half of the one side fairingstructure is considered for the analysis and symmetric boundary conditions are used.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855557
|
oai_dc
|
Seismic repair of exterior R/C beam-to-column joints using two-sided and three-sided jackets
|
Seismic repair of exterior R/C beam-to-column joints using two-sided and three-sided jackets
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"AlexanderG.Tsonos(Aristotle University of Thessaloniki)"
] |
토목공학
| null |
kci_detailed_000083.xml
|
||||
ART000855559
|
oai_dc
|
A C0 finite element investigation for buckling of shear deformable laminated composite plates with random material properties
|
A C0 finite element investigation for buckling of shear deformable laminated composite plates with random material properties
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"B.N.Singh(Indian Institute of Technology); N.G.R.lyengar(Indian Institute of Technology); D.Yadav(Indian Institute of Technology)"
] |
토목공학
| null |
kci_detailed_000083.xml
|
||||
ART000874724
|
oai_dc
|
Modal analysis of eccentric shells with fluid-filled annulus
|
Modal analysis of eccentric shells with fluid-filled annulus
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Myung Jo Jhung(Korea Institute of Nuclear Safety); KyeongHoonJeong(Korea Atomic Energy Research Institute); WonGulHwang(Chonnam National University)"
] |
Investigated in this study are the modal characteristics of the eccentric cylindrical shells withfluid-filled annulus. Theoretical method is developed to find the natural frequencies of the shell using thefinite Fourier expansion, and their results are compared with those of finite element method to verify thevalidation of the method developed. The effect of eccentricity on the modal characteristics of the shells isinvestigated using a finite element modeling.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874723
|
oai_dc
|
Free vibrations of inclined arches using finite elements
|
Free vibrations of inclined arches using finite elements
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Somchai Chucheepsakul(King Mongkut’s University of Technology Thonburi); WasurootSaetiew(King Mongkut’s University of Technology Thonburi)"
] |
This paper presents a finite element approach for determining the natural frequencies forplanar inclined arches of various shapes vibrating in three-dimensional space. The profile of inclinedarches, represented by undeformed centriodal axis of cross-section, is defined by the equation of planecurves expressed in the rectangular coordinates which are : circular, parabolic, sine, elliptic, and catenaryshapes. In free vibration state, the arch is slightly displaced from its undeformed position. The linearrelationship between curvature-torsion and axial strain is expressed in terms of the displacements in three-dimensional space. The finite element discretization along the span length is used rather than the total arclength. Numerical results for arches of various shapes are given and they are in good agreement withthose reported in literature. The natural frequency parameters and mode shapes are reported as functionsof two nondimensional parameters: the span to cord length ratio (e) and the rise to cord length ratio (f).
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001195658
|
oai_dc
|
Transient linear elastodynamic analysis in time domainbased on the integro-differential equations
|
Transient linear elastodynamic analysis in time domainbased on the integro-differential equations
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Woo-Jin Sim(Kum-Oh National University of Technology); Sung-HeeLee(Kum-Oh National University of Technology)"
] |
A finite element formulation for the time-domain analysis of linear transient elastodynamicproblems is presented based on the weak form obtained by applying the Galerkin's method to the integro-diferential equations which contain the initial conditions implicitly and does not include the inertia terms.The weak form is extended temporally under the assumptions of the constant and linear time variations offield variables, since the time-stepping algorithms such as the Newmark method and the Wilson q-methodare not necessary, obtaining two kinds of implicit finite element equations which are tested for numericalaccuracy and convergency. Three classical examples having finite and infinite domains are solved andnumerical results are compared with the other analytical and numerical solutions to show the versatilityand accuracy of the presented formulation.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001197469
|
oai_dc
|
Mixed finite element formulation for folded plates
|
Mixed finite element formulation for folded plates
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Nihal Eratli(Istanbul Technical University); A.Yal午nAk？z(Istanbul Technical University)"
] |
In this study, a new functional is obtained for folded plates with geometric (kinematic) anddynamic (natural) boundary conditions. This functional is the combination of two different functionals.Both functionals are obtained for thick plates which carry in-plane and lateral forces. A new mixed finiteelement is developed with 4 13 nodal parameters for folded plates (REC52). Forces and moments whichare the necessary unknowns in engineering problems are obtained directly using the technique suggestedhere. The use of the global co-ordinate system causes time consuming operations and therefore theLagrange multiplier method is used to relate the components of the parameters on the fold line.Numerical results are presented for folded plates and compared with experimental results.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874880
|
oai_dc
|
The buckling of a cross-ply laminated non-homogeneous orthotropic composite cylindrical thin shell under time dependent external pressure
|
The buckling of a cross-ply laminated non-homogeneous orthotropic composite cylindrical thin shell under time dependent external pressure
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. H. Sofiyev(Suleyman Demirel University)"
] |
The subject of this investigation is to study the buckling of cross-ply laminated orthotropiccylindrical thin shells with variable elasticity moduli and densities in the thickness direction, underexternal pressure, which is a power function of time. The dynamic stability and compatibility equationsare obtained first. These equations are subsequently reduced to a system of time dependent differentialequations with variable coefficients by using Galerkins method. Finally, the critical dynamic and staticloads, the corresponding wave numbers, the dynamic factors, critical time and critical impulse are foundanalytically by applying a modified form of the Ritz type variational method. The dynamic behavior ofcross-ply laminated cylindrical shells is investigated with: a) lamina that present variations in the elasticitymoduli and densities, b) different numbers and ordering of layers, and c) external pressures which varywith different powers of time. It is concluded that all these factors contribute to appreciable effects on thecritical parameters of the problem in question.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855382
|
oai_dc
|
A 2D hybrid stress element for improved prediction of the out-of-plane fields using Fourier expansion
|
A 2D hybrid stress element for improved prediction of the out-of-plane fields using Fourier expansion
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M. L. Feng(Central Queensland University); M.Dhanasekar(Central Queensland University); Q.Z.Xiao(University of Science and Technology of China)"
] |
Recently we formulated a 2D hybrid stress element from the 3D Hellinger-Reisner principlefor the analysis of thick bodies that are symmetric to the thickness direction. Polynomials have typicallybeen used for all the displacement and stress fields. Although the element predicted the dominant stressand all displacement fields accurately, its prediction of the out-of-plane shear stresses was affected by thevery high order terms used in the polynomials. This paper describes an improved formulation of the 2Delement using Fourier series expansion for the out-of-plane displacement and stress fields. Numericalresults illustrate that its predictions have markedly improved.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001195660
|
oai_dc
|
Automatic decomposition of unstructured meshes employing genetic algorithms for parallel FEM computations
|
Automatic decomposition of unstructured meshes employing genetic algorithms for parallel FEM computations
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. Rama Mohan Rao(Structural Engineering Research Centre); T.V.S.R.AppaRao(Structural Engineering Research Centre); B.Dattaguru(Indian Institute of Science)"
] |
Parallel execution of computational mechanics codes requires efficient mesh-partitioningtechniques. These mesh-partitioning techniques divide the mesh into specified number of submeshes ofapproximately the same size and at the same time, minimise the interface nodes of the submeshes. Thispaper describes a new mesh partitioning technique, employing Genetic Algorithms. The proposedalgorithm operates on the deduced graph (dual or nodal graph) of the given finite element mesh ratherthan directly on the mesh itself. The algorithm works by first constructing a coarse graph approximationusing an automatic graph coarsening method. The coarse graph is partitioned and the results areinterpolated onto the original graph to initialise an optimisation of the graph partition problem. In practice,hierarchy of (usually more than two) graphs are used to obtain the final graph partition. The proposedpartitioning algorithm is applied to graphs derived from unstructured finite element meshes describingpractical engineering problems and also several example graphs related to finite element meshes given inthe literature. The test results indicate that the proposed GA based graph partitioning algorithm generateshigh quality partitions and are superior to spectral and multilevel graph partitioning algorithms.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855440
|
oai_dc
|
Imperfection sensitivity to elastic buckling of wind loaded open cylindrical tanks
|
Imperfection sensitivity to elastic buckling of wind loaded open cylindrical tanks
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Luis A. Godoy(University of Puerto Rico); FernandoG.Flores(National University of C？rdoba)"
] |
This paper considers the buckling and post-buckling behavior of empty metal storage tanksunder wind load. The structures of such tanks may be idealized as cantilever cylindrical shells, and thestructural response is investigated using a computational model. The modeling employs a doubly curvedfinite element based on a theory by Simo and coworkers, which is capable of handling largedisplacements and plasticity. Buckling results for tanks with four diferent geometric relations arepresented to consider the influence of the ratios between the radius and the height of the shell (R/L), andbetween the radius and the thickness (R/t). The studies aim to clarify the diferences in the shellsregarding their imperfection-sensitivity. The results show that thin-walled short tanks, with R/L=3,display high imperfection sensitivity, while tanks with R/L= 0.5 are almost insensitive to imperfections.Changes in the total potential energy of tanks that would buckle under the same high wind pressures arealso considered.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001002295
|
oai_dc
|
Dynamic elastic local buckling of piles under impact loads
|
Dynamic elastic local buckling of piles under impact loads
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. Yang(University of Leeds); J.Q.Ye(University of Leeds)"
] |
A dynamic elastic local buckling analysis is presented for a pile subjected to an axial impactload. The pile is assumed to be geometrically perfect. The interactions between the pile and thesurrounding soil are taken into account. The interactions include the normal pressure and skin friction onthe surface of the pile due to the resistance of the soil. The analysis also includes the influence of thepropagation of stress waves through the length of the pile to the distance at which buckling is initiatedand the mas of the pile. A perturbation technique is used to determine the critical buckling length andthe associated critical time. As a special case, the explicit expression for the buckling length of a pile isobtained without considering soil resistance and compared with the one obtained for a column by meansof an alternative method. Numerical results obtained show good agreement with the experimental results.The effects of the normal pressure and the skin friction due to the surrounding soil, self-weight, stiffnessand geometric dimension of the cross section the critical buckling length are discussed. The suddenchange of buckling modes is further considered to show the nap-through phenomenon occurring as aresult of stres wave propagation.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001197470
|
oai_dc
|
Penetration mechanisms of non-deforming projectiles into reinforced concrete barriers
|
Penetration mechanisms of non-deforming projectiles into reinforced concrete barriers
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Avraham N. Dancygier(Department of Civil Engineering and National Building Research Institute); DavidZ.Yankelevsky(Department of Civil Engineering and National Building Research Institute)"
] |
Static and dynamic penetration tests of reinforced concrete (RC) slab specimens are describedand discussed. The experimental study was aimed at a better understanding of mechanisms that areinvolved in dynamic penetration, through their identification in static tests, and by establishing theirrelative influence in similar dynamic cases. The RC specimens were 80 80-cm square plates, and theywere made of 30 MPa concrete. The non-deforming steel penetrator was a 50-m diameter stel rod witha conical nose of 1.5 aspect ratio. Impact penetration tests were carried out with an air gun, whichlaunched the projectiles at velocities of up to 300 m/sec. The static tests were conducted using a closedloop displacement control actuator, where the penetrator was pushed at a constant rate of displacementinto the specimen. The static tests reveal important mechanisms that govern the penetration process andtherefore contribute to a better understanding of RC barriers resistance to non-deforming projectilesimpact.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874795
|
oai_dc
|
Structural vibration control using resistively shunted piezoceramics
|
Structural vibration control using resistively shunted piezoceramics
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"S. B. Kandagal(Indian Institute of Science); KartikVenkatraman(Indian Institute of Science)"
] |
Application of piezoceramic materials in actuation and sensing of vibration is of currentinterest. Potential and more popular applications of piezoceramics are probably in the field of activevibration control. However, the objective of this work is to investigate the effect of shunted piezoceramicsas passive vibration control devices when bonded to a host structure. Resistive shunting of a piezoceramicbonded to a cantilevered duralumin beam has been investigated. The piezoceramic is connected in parallelto an electrical network comprising of resistors and inductors. The piezoceramic is a capacitor that storesand discharges electrical energy that is transformed from the mechanical motion of the structure to whichit is bonded. A resistor acros the piezoceramic would be termed as a resistively shunted piezoceramic.Similarly, an inductor across the piezoceramic is termed as a resonantly shunted piezoceramic. In thisstudy, the effect of resistive shunting on the nature of damping enhancement to the host structure has beeninvestigated. Analytical studies are presented along with experimental results.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874785
|
oai_dc
|
Pressure-temperature limit curve for reactor vessel evaluated by ASME code
|
Pressure-temperature limit curve for reactor vessel evaluated by ASME code
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Myung Jo Jhung(Korea Institute of Nuclear Safety); SeokHunKim(Korea Institute of Nuclear Safety); SungGyuJung(Korea Power Engineering Company, Inc.)"
] |
A comparative assessment study for a generation of the pressure-temperature (P-T) limitcurve of a reactor vesel is performed in accordance with ASME code. Using cooling or heating rate andvessel material properties, stress distribution is obtained to calculate stress intensity factors, which arecompared with the material fracture toughness to determine the relations between operating pressure andtemperature during reactor cool-down and heat-up. P-T limit curves are analyzed with respect to defectorientation, clad thickness, toughness curve, cooling or heating rate and neutron fluence. The resulting P-Tcurves are compared each other.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874721
|
oai_dc
|
Correlation between torsional vibration and translational vibration
|
Correlation between torsional vibration and translational vibration
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"V. Jeng(National Taiwan University of Science and Technology); Y.L.Tsai(National Taiwan University of Science and Technology)"
] |
This paper presents theoretical investigation on the cros correlation between torsionalvibration (uq) and translation vibration (ux) of asymmetrical structure under white noise excitation. Theformula reveals that the cross correlation coefficient (r) is a function of uncoupled frequency ratio (W =wq /wx), eccentricity, and damping ratio (x). Simulations involving acceleration records from fifteendiferent earthquakes show correlation coefficients results similar to the theoretical correlation coefficients.The uncoupled frequency ratio is the dominating parameter to r; generally, r is positive for wq/wx>1.0,negative for wq /wx < 1.0, and close to zero for wq /wx = 1.0. When the eccentricity or damping ratioincreases, r increases moderately for small W (< 1.0) only. The relation among ux, uq and cornerdisplacement are best presented by r; a simple way to hand-calculate the theoretical dynamic cornerdisplacements from ux, uq and r is proposed as an alternative to dynamic analysis.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855379
|
oai_dc
|
Mass perturbation influence method for dynamicanalysis of offshore structures
|
Mass perturbation influence method for dynamicanalysis of offshore structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Kyu Nam Cho(Hongik University)"
] |
The current work presents an analysis algorithm for the modal analysis for the dynamicbehaviors of ofshore structures with concepts of mas perturbation influence term. The mas perturbationconcept by using the term, presented in this paper offers an efficient solution procedure for dynamicalresponse problems of offshore structures. The basis of the proposed method is the mas perturbationinfluence concepts associated with natural frequencies and mode shapes and mas properties of the givenstructure. The mathematical formulation of the mass perturbation influence method is described. Newsolution procedures for dynamics analysis are developed, followed by illustrative example problems,which deal with the effectiveness of the new solution procedures for the dynamic analysis of offshorestructures. The solution procedures presented herein is compact and computationally simple.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001002935
|
oai_dc
|
A robust nonlinear mathematical programming model fordesign of laterally loaded orthotropic steel plates
|
A robust nonlinear mathematical programming model fordesign of laterally loaded orthotropic steel plates
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"H. Maaly(Zagazig University); F.F.Mahmoud(Zagazig University); I.I.Ishac(Zagazig University)"
] |
The main objective of the present paper is to address a formal procedure for orthotropic steelplates design. The theme of the proposed approach is to recast the design procedure into a mathematicalprograming model. The objective function to be optimized is the total weight of the structure. The totalweight is function of its layout parameters and structural element design variables. Mean while theproposed approach takes into consideration the strength and rigidity criteria in addition to otherdimensional constraints. A nonlinear programming model is developed which consists of a nonlinearobjective function and a set of implicit/explicit nonlinear constraints. A transformation method is adoptedfor minimization strategy, where the primal model constrained problem is transformed into a sequence ofunconstrained minimization models. The search strategy is based on the well-known Fletcher/Powelalgorithm. The finite element technique is adopted for discretization and analysis strategies. Mindlintheory is selected to simulate the finite element model and a selective reduced integration scheme isexploited to avoid a shear lock problem.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855458
|
oai_dc
|
Probabilistic dynamic analysis of truss structures
|
Probabilistic dynamic analysis of truss structures
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. J. Chen(Xidian University); J.W.Che(Xidian University); H.A.Sun(Xidian University); H.B.Ma(Xidian University); M.T.Cui(Xidian University)"
] |
The problem of dynamic analysis of truss structures based on probability is studied in thispaper. Considering the randomness of both physical parameters (elastic module and mass density) ofstructural materials and geometric dimension of bars respectively or simultaneously, the stiffness and massmatrixes of the elements and structure have been built. The structure dynamic characteristic based onprobability is analyzed, and the expressions of numeral characteristics of inherence frequency randomvariable are derived from the Rayleighs quotient. The method of structural dynamic analysis based onprobability is developed. Finally, two examples are given.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874716
|
oai_dc
|
Integrated equations of motion for direct integration methods
|
Integrated equations of motion for direct integration methods
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Shuenn-Yih Chang(National Taiwan University)"
] |
In performing the dynamic analysis, the step size used in a step-by-step integration methodmight be much smaller than that required by the accuracy consideration in order to capture the rapidchanges of dynamic loading or to eliminate the linearization errors. It was first found by Chen andRobinson that these difficulties might be overcome by integrating the equations of motion with respect totime once. A further study of this technique is conducted herein. This include the theoretical evaluationand comparison of the capability to capture the rapid changes of dynamic loading if using the constantaverage acceleration method and its integral form and the exploration of the superiority of the timeintegration to reduce the linearization error. In addition, its advantage in the solution of the impactproblems or the wave propagation problems is also numerically demonstrated. It seems that this timeintegration technique can be applicable to all the currently available direct integration methods.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874786
|
oai_dc
|
An investigation of torsionally irregular multi-storybuildings under earthquake loading
|
An investigation of torsionally irregular multi-storybuildings under earthquake loading
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"G.Ozmen(Istanbul Technical University); F.G.G？lay(Istanbul Technical University)"
] |
It is well known that torsionally unbalanced buildings are more vulnerable to earthquakehazards than are the regular structural systems. In this paper, a parametric investigation is presented, inorder to observe the amplification in the internal forces, when increased eccentricities are used instead ofthe ones corresponding to the 5% accidental eccentricity. A series of five, ten-story framed and walledstructures, with rather high torsional irregularity coefficients, are selected and a numerical test procedure isapplied. Numerical results show that the maximum amplification in the internal forces at the most criticalbeams and columns at the flexible sides of the structures is about 10%. It is concluded that, more seriousmeasures in the codes are needed in the case of this rather dangerous type of irregularity.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001197678
|
oai_dc
|
Coupled buffeting response analysis of long-span bridges by the CQC approach
|
Coupled buffeting response analysis of long-span bridges by the CQC approach
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Quanshun Ding(Tongji University); AirongChen(Tongji University); HaifanXiang(Tongji University)"
] |
Based on the modal coordinates of the structure, a finite-element and CQC (completequadratic combination) method for analyzing the coupled buffeting response of long-span bridges ispresented. The formulation of nodal equivalent aerodynamic bufeting forces is derived based on areasonable assumption. The power spectral density and variance of nodal displacements and elementalinternal forces of the bridge structure are computed using the finite-element method and the randomvibration theory. The method presented is very efficient and can consider the arbitrary spectrum andspatial coherence of natural winds and the multimode and intermode effects on the buffeting responses ofbridge structures. A coupled bufeting analysis of the Jiangyin Yangtse River Suspension Bridge with1385 m main span is performed as an example. The results analyzed show that the multimode andintermode effects on the bufeting response of the bridge deck are quite remarkable.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874790
|
oai_dc
|
Scaling laws for vibration response of anti-symmetrically laminated plates
|
Scaling laws for vibration response of anti-symmetrically laminated plates
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Pairod Singhatanadgid(Chulalongkorn University); VariddhiUngbhakorn(Chulalongkorn University)"
] |
The scaling laws for vibration response of anti-symetrically laminated plates are derived byapplying the similitude transformation to the governing differential equations directly. With this approach,a closed-form solution of the governing equations is not required. This is a significant advantage over themethod employed by other researchers where similitude transformation is applied to the closed-formsolution. The scaling laws are tested by comparing the similitude fundamental frequencies to thetheoretical fundamental frequencies determined from the available closed-form solutions. In case ofcomplete similitude, similitude solutions from the scaling laws exactly agree with the theoretical solutions.Sometimes, it may not be feasible to select the model which obeys the similarity requirement completely,therefore partial similitude is theoretically investigated and approximate scaling laws are recomended.The distorted models in stacking sequences and laminated material properties demonstrate reasonableaccuracy. On the contrary, a model with distortion in fiber angle is not recommended. The derived scalinglaws are very useful to determine the vibration response of complex prototypes by performing theexperiment on a model with required similarities.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001197674
|
oai_dc
|
Applications of an improved estimator of the constitutiverelation error to plasticity problems
|
Applications of an improved estimator of the constitutiverelation error to plasticity problems
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"L. Gallimard(ENS Cachan/CNRS/Univ.); P.Ladev？ze(ENS Cachan/CNRS/Univ.); J.P.Pelle(ENS Cachan/CNRS/Univ.)"
] |
This paper presents several applications of an improved estimator of the constitutive relationerror (CRE) for plasticity problems. The cumulative aspect of the CRE estimator with respect to time isanalyzed and we propose a first analysis of the local effectivity indexes of the CRE estimator in plasticity.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874791
|
oai_dc
|
New methodology of backbone curve for RC perforated shear walls
|
New methodology of backbone curve for RC perforated shear walls
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jing-Shyang Yang(Carson K.C. Mok Consulting Engineer); FranklinY.Cheng(University of Missouri-Rolla)"
] |
Following a series of experiments on isolated low-rise RC shear walls with openings, atheoretical study on the backbone curve of a perforated shear wall shows that there are some importantobservations from experimental results that make clear a semi-empirical formula of the backbone curve ofa perforated wall. Critical shear zones can be depicted from the configuration of shear walls withopenings. Diferent factors, including the size and location of shear wall openings, the walls height/widthratio, horizontal and vertical steel bar ratios, and location and amount of diagonal steel bars are involvedin the derivation of the backbone curve. Bending and shear effects are also considered in the paper. Inaddition, a comparison of load and displacement for solid and perforated shear walls is discussed.Generally, the comparison between experimental curves and computed backbone curves is favorable.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874796
|
oai_dc
|
Seismic repair of reinforced concrete beam-column subassemblages of modern structures by epoxy injection technique
|
Seismic repair of reinforced concrete beam-column subassemblages of modern structures by epoxy injection technique
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Alexander G. Tsonos(Aristotle University of Thessaloniki)"
] |
The use of the epoxy pressure injection technique to rehabilitate reinforced concrete beam-column joints damaged by strong earthquakes is investigated experimentally and analytically. Two one-half-scale exterior beam-column joint specimens were exposed to reverse cyclic loading similar to thatgenerated from strong earthquake ground motion, resulting in damage. Both specimens were typical ofnew structures and incorporated full seismic details in current building codes. Thus the first specimen wasdesigned according to Eurocode 2 and Eurocode 8 and the second specimen was designed according toACI-318 (195) and ACI-ASCE Committee 352 (1985). The specimens were then repaired with an epoxypressure injection technique. The repaired specimens were subjected to the same displacement history asthat imposed on the original specimens. The results indicate that the epoxy pressure injection techniquewas effective in restoring the strength, stiffness and energy disipation capacity of specimens representinga modern design.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855373
|
oai_dc
|
Inelastic seismic analysis of RC bridge piers includingflexure-shear-axial interaction
|
Inelastic seismic analysis of RC bridge piers includingflexure-shear-axial interaction
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Do Hyung Lee(Paichai University); AmrS.Elnashai(University of Illinois at Urbana-Champaign)"
] |
The effect of shear coupled with axial force variation on the inelastic seismic behaviour ofreinforced concrete bridge piers is investigated in this paper. For this purpose, a hysteretic axial-shearinteraction model was developed and implemented in a nonlinear finite element analysis program. Thus,flexure-shear-axial interaction is simulated under variable amplitude reversed actions. Comparative studiesfor shear-dominated reinforced concrete columns indicated that a conventional FE model based on flexure-axial interaction only gave wholly inadequate results and was therefore incapable of predicting thebehaviour of such members. Analysis of a reinforced concrete bridge damaged during the Northridge(California 1994) earthquake demonstrated the importance of shear modelling. The contribution of sheardeformation to total displacement was considerable, leading to increased ductility demand. Moreover, theeffect of shear with axial force variation can significantly affect strength, stiffness and energy dissipationcapacity of reinforced concrete members. It is concluded that flexure-shear-axial interaction should betaken into account in assessing the behaviour of reinforced concrete bridge columns, especially in thepresence of high vertical ground motion.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855374
|
oai_dc
|
Mixed finite element model for laminated composite beams
|
Mixed finite element model for laminated composite beams
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. M. Desai(Indian Institute of Technology Bombay); G.S.Ramtekkar(Indian Institute of Technology Bombay)"
] |
A novel, 6-node, two-dimensional mixed finite element (FE) model has been developed toanalyze laminated composite beams by using the minimum potential energy principle. The model hasbeen formulated by considering four degrees of freedom (two displacement components u, w and twotransverse stress components sz, txz) per node. The transverse stress components have been invoked asnodal degrees of freedom by using the fundamental elasticity equations. Thus, the present mixed finiteelement model not only ensures the continuity of transverse stress and displacement fields through thethickness of the laminated beams but also maintains the fundamental elasticity relationship between thecomponents of stress, strain and displacement fields throughout the elastic continuum. This is animportant feature of the present formulation, which has not been observed in various mixed formulationsavailable in the literature. Results obtained from the model have been shown to be in excellent agreementwith the elasticity solutions for thin as well as thick laminated composite beams. A few results for across-ply beam under fixed support conditions are also presented.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001195656
|
oai_dc
|
Thermomechanical buckling of rectangular, shear-deformable, composite laminated plates
|
Thermomechanical buckling of rectangular, shear-deformable, composite laminated plates
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. S. Ge(The University of Birmingham); W.X.Yuan(The University of Birmingham); D.J.Dawe(The University of Birmingham)"
] |
The B-spline finite strip method is developed for the prediction of the buckling ofrectangular composite laminated plates under the combined action of applied uniaxial mechanical stressand increasing temperature. The analysis is conducted in two stages, namely an in-plane stress analysis inthe pre-buckling stage to determine the pre-buckling stresses, folowed by a buckling analysis using thesedetermined stresses. The buckling analysis is based on the use of first-order shear deformation platetheory. The permitted lay-up of the laminates is quite general, within the constraint that the plate remainsflat prior to buckling, and a wide range of boundary conditions can be accomodated. A number ofapplications is described and comparison of the results generated using the finite strip method is madewith the results of previous studies.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874717
|
oai_dc
|
Thermomechanical analysis of the tensile test: simulation and experimental validation
|
Thermomechanical analysis of the tensile test: simulation and experimental validation
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Diego J. Celentano(Universidad de Santiago de Chile)"
] |
This paper presents experimental and numerical analyses of the thermomechanical behaviourthat takes place in SAE1020 mild steel cylindrical specimens during the conventional tensile test. A set ofexperiments has been carried out in order to obtain the stres-strain curve and the diameter evolution atthe neck which allow, in turn, to derive the elastic and hardening parameters characterizing the materialresponse. Temperature evolutions have also been measured for a high strain rate situation. Moreover, afinite element large strain thermoelastoplasticity-based formulation is proposed and used to simulate thedeformation process during the whole test. Some important aspects of this formulation are discussed.Finally, the results provided by the simulation are experimentally validated.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874719
|
oai_dc
|
Mechanics of missile penetration into geo-materials
|
Mechanics of missile penetration into geo-materials
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"N. A. Siddiqui(Aligarh Muslim University); H.Abbas(Aligarh Muslim University)"
] |
The present study aims to improve an existing model for the prediction of deceleration timehistory, penetration depth and forces on ogive and conical nose shaped misiles under normal impact intogeo-material targets. The actual ogive nose shaped missile has been considered in the analysis and theresults thus obtained have been compared with the existing model and significant improvements arefound. A close proximity in the results has also been observed with the experimental values. The resultsof ogive nose shaped missile have also been compared with equivalent conical nose shaped missile.Variation of radial streses along nose length and radial direction has been studied. Effect of CRH onmisile penetrating performance has been investigated.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874729
|
oai_dc
|
Moving force identification from bending moment responses of bridge
|
Moving force identification from bending moment responses of bridge
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Ling Yu(The Hong Kong Polytechnic University); TommyH.T.Chan(The Hong Kong Polytechnic University)"
] |
Moving force identification is a very important inverse problem in structural dynamics. Mostof the identification methods are eventually converted to a linear algebraic equation set. Diferent ways tosolve the equation set may lead to solutions with completely diferent levels of accuracy. Based on themeasured bending moment responses of the bridge made in laboratory, this paper presented the timedomain method (TDM) and frequency-time domain method (FTDM) for identifying the two moving wheelloads of a vehicle moving across a bridge. Directly calculating pseudo-inverse (PI) matrix and using thesingular value decomposition (SVD) technique are adopted as means for solving the over-determinedsystem equation in the TDM and FTDM. The effects of bridge and vehicle parameters on the TDM andFTDM are also investigated. Assessment results show that the SVD technique can effectively improveidentification accuracy when using the TDM and FTDM, particularly in the case of the FTDM. Thisimproved accuracy makes the TDM and FTDM more feasible and acceptable as methods for movingforce identification.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855442
|
oai_dc
|
Analysis of transversely isotropic hollow toroids using the semi-analytical DQM
|
Analysis of transversely isotropic hollow toroids using the semi-analytical DQM
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"W.Jiang(University of Ottawa); D.Redekop(University of Ottawa)"
] |
토목공학
| null |
kci_detailed_000083.xml
|
||||
ART000855533
|
oai_dc
|
Evaluation of torsional natural frequenciesB fornon-tubular bonded joints
|
Evaluation of torsional natural frequenciesB fornon-tubular bonded joints
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"NicolaPugno(Politecnico di Torino); RomualdoRuotolo(Politecnico di Torino)"
] |
토목공학
| null |
kci_detailed_000083.xml
|
||||
ART000855558
|
oai_dc
|
Minimum-weight seismic design of a moment-resisting frame accounting for incremental collapse
|
Minimum-weight seismic design of a moment-resisting frame accounting for incremental collapse
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Han-SeonLee(Korea University)"
] |
토목공학
| null |
kci_detailed_000083.xml
|
||||
ART000855561
|
oai_dc
|
Behavior of damaged and undamaged concretestrengthened by carbon fiber composite sheets
|
Behavior of damaged and undamaged concretestrengthened by carbon fiber composite sheets
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"AlperIlkiandNahitKumbasar(Istanbul Technical University)"
] |
토목공학
| null |
kci_detailed_000083.xml
|
||||
ART000874728
|
oai_dc
|
Ultimate response of bionics shells
|
Ultimate response of bionics shells
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Alexander Tesar(Slovak Academy of Sciences); MichalMin？r(Slovak Academy of Sciences)"
] |
Numerical analysis of ultimate behaviour of thin bionics shells is treated in present paper.Interactive conditions in resonance and stability ultimate response are considered. Numerical treatment ofnonlinear problems appearing is made using the updated Lagrangian formulation of motion. Each step ofthe iteration approaches the solution of linear problem and the feasibility of parallel processing FETM-technique with adaptive mesh refinement and substructuring for the analysis of ultimate action of thinbionics shells is established. Some numerical results are submitted in order to demonstrate the efficiencyof the procedures suggested.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874797
|
oai_dc
|
Prediction of premature separation of bonded CFRP plates from strengthened steel beams using a fracture criterion
|
Prediction of premature separation of bonded CFRP plates from strengthened steel beams using a fracture criterion
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"A. Lenwari(Chulalongkorn University); T.Thepchatri(Chulalongkorn University); E.Watanabe(Kyoto University)"
] |
This paper presents a method for predicting premature separation of carbon fiber reinforcedplastic (CFRP) plates from strengthened steel beams. The fracture criterion based on material-inducedsingularity is formulated in terms of a singular intensity factor. Static test on double strap joints wasselected to provide the critical stress intensity factor in the criterion because good degree of accuracy andconsistency of experimental data can be expected compared with the unsymmetrically loaded single lapjoints. The debond/separation loads of stel beams with different CFRP lengths were measured and comparedwith those predicted from the criterion. Good agreement betwen the test results and the prediction was found.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001003419
|
oai_dc
|
Transverse earthquake-induced forces in continuous bridges
|
Transverse earthquake-induced forces in continuous bridges
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Nazzal S. Armouti(University of Jordan)"
] |
A simplified rational method is developed to evaluate transverse earthquake-induced forces incontinuous bridges. This method models the bridge as a beam on elastic foundation, and assumes asinusoidal curve for both vibration mode shape and deflected shape in the transverse direction. Theprinciple of minimum total potential is used to calculate the displacements and the earthquake-inducedforces in the transverse direction. This method is concise and easy to apply, and hence, offers an attractivealternative to a lengthy and time consuming three dimensional modeling of the bridge as given byAASHTO under its Single Mode Spectral Analysis Method.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874722
|
oai_dc
|
Comparative dynamic studies of thick laminated composite shells based on higher-order theories
|
Comparative dynamic studies of thick laminated composite shells based on higher-order theories
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"M. Ganapathi(Institute of Armament Technology); B.P.Patel(Institute of Armament Technology); D.S.Pawargi(Institute of Armament Technology); H.G.Patel(Institute of Armament Technology)"
] |
Here, the dynamic response characteristics of thick cross-ply laminated composite cylindricalshells are studied using a higher-order displacement model. The formulation accounts for the nonlinearvariation of the in-plane and transverse displacements through the thickness, and abrupt discontinuity inslope of the in-plane displacements at any interface. The effect of inplane and rotary inertia terms isincluded. The analysis is carried out using finite element approach. The influences of various terms in thehigher-order displacement field on the free vibrations, and transient dynamic response characteristics ofcylindrical composite shells subjected to thermal and mechanical loads are analyzed.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874878
|
oai_dc
|
Reinforced concrete beam-column joints with lap splices under cyclic loading
|
Reinforced concrete beam-column joints with lap splices under cyclic loading
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Athanasios I. Karabinis(Democritus University of Thrace)"
] |
Experimental results are presented from tests conducted on reinforced concrete beam-columnjoints with lap splices under reversed cyclic loading simulating earthquake action. Response curves arecompared for twenty-four specimens designed according to Eurocode 2. The main parameters of theinvestigation are, the geometry of the reinforcing bar extension, the applied axial load (normalized), theavailable cover over lap splice region extended as length required from Eurocode 2, as well as the shapeand the volumetric percentage of the stirrups confining the lap splice zone. The results are evaluated withregards to the load intensity, the energy absorption capacity and the characteristics of the load deflection curve.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874726
|
oai_dc
|
Optimal distribution of the cable tensions and structural vibration control of the cable-cabin flexible structure
|
Optimal distribution of the cable tensions and structural vibration control of the cable-cabin flexible structure
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Y. Y. Qiu(Xidian University); B.Y.Duan(Xidian University); Q.Wei(Xidian University); R.D.Nan(Chinese Academy); B.Peng(Chinese Academy)"
] |
In order to trace a target in deep sky, a feed cabin 20 tons in weight used for a large radiotelescope is drawn with six cables. To realize a smoth tracing all the time, optimal distribution of thecable tensions is explored. A set of cable-clog systems is utilized to control the wind-induced vibration ofthe cable-cabin structure. This is an attempt to apply the passive structural control strategy in the area ofradio astronomy. Simulations of wind-induced vibration of the structure in both time and frequencydomains offer a valuable reference for construction of the next generation large radio telescope.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855378
|
oai_dc
|
An 8-node assumed strain element with explicit integration for isotropic and laminated composite shells
|
An 8-node assumed strain element with explicit integration for isotropic and laminated composite shells
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"K. D. Kim(Asian Institute of Technology); 박대효(한양대학교)"
] |
Formulation of an 8 nodes assumed strain shell element is presented for the analysis ofshells. The stiffness matrix based on the Mindlin-Reisner theory is analytically integrated through thethickness. The element is free of membrane and shear locking behavior by using the assumed strainmethod such that the element performs very well in modeling of thin shell structures. The material isassumed to be isotropic and laminated composite. The element has six degrees of freedom per node andcan model the stiffened plates and shells. A great number of numerical testing carried out for thevalidation of present 8 node shell element are in good agreement with references.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001002934
|
oai_dc
|
A fracture criterion for high-strength steel cracked bars
|
A fracture criterion for high-strength steel cracked bars
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. Toribio(University of Salamanca)"
] |
In this paper a fracture criterion is proposed for cracked cylindrical samples of high-strengthprestressing steels of diferent yield strength. The surface crack is assumed to be semi-elliptical, ageometry very adequate to model sharp defects produced by any subcritical mechanism of cracking:mechanical fatigue, stress-corrosion cracking, hydrogen embrittlement or corrosion fatigue. Two fracturecriteria with different meanings are considered: a global (energetic) criterion based on the energy releaserate G, and a local (stress) criterion based on the stress intensity factor KI. The advantages anddisadvantages of both criteria for engineering design are discussed in this paper on the basis of manyexperimental results of fracture tests on cracked wires of high-strength prestressing steels of diferent yieldstrength and with diferent degrees of strength anisotropy.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874725
|
oai_dc
|
Nonlinear control of a 20-story steel building with activepiezoelectric friction dampers
|
Nonlinear control of a 20-story steel building with activepiezoelectric friction dampers
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Chaoqiang Chen(University of Missouri-Rolla); GendaChen(University of Missouri-Rolla)"
] |
A control algorithm combining viscous and non-linear Reid damping mechanisms has beenrecently proposed by the authors to command active friction dampers. In this paper, friction dampers andthe proposed algorithm are applied to control the seismic responses of a nonlinear 20-story building.Piezoelectric stack actuators are used to implement the control algorithm. The capacity of each damper isdetermined by the practical size of piezoelectric actuators and the availability of power supply. Thesaturation effect of the actuators on the building responses is investigated. To minimize the peak storydrift ratio or floor acceleration of the building structure, a practical sequential procedure is developed tosub-optimally place the dampers on various flors. The effectiveness of active friction dampers and theefficiency of the proposed sequential procedure are verified by subjecting the building structure to fourearthquakes of various intensities. The performance of 80 dampers and 137 dampers installed on thestructure is evaluated according to 5 criteria. Numerical simulations indicated that the proposed controlalgorithm effectively reduces the seismic responses of the uncontroled 20-story building, such as inelasticdeformation. The sub-optimal placement of dampers based on peak acceleration outperforms that based onpeak drift ratio for structures subjected to near-fault ground motions. Saturation of piezoelectric actuatorshas adverse effect on floor acceleration.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855455
|
oai_dc
|
Large displacement analysis of inelastic frame structures by convected material frame approach
|
Large displacement analysis of inelastic frame structures by convected material frame approach
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Yaw-JengChiou(National Cheng Kung University); Yeon-KangWang(National Defense University); Pang-AnHsiao(National Cheng Kung University); Yi-LungChen(National Cheng Kung University)"
] |
This paper presents the convected material frame approach to study the nonlinear behavior ofinelastic frame structures. The convected material frame approach is a modification of the co-rotationalapproximation by incorporating an adaptive convected material frame in the basic definition of thedisplacement vector and strain tensor. In the formulation, each discrete element is associated with a localcoordinate system that rotates and translates with the element. For each load increment, the correspondingstrain-displacement and nodal force-stress relationships are defined in the updated local coordinates, andbased on the updated element geometry. The rigid body motion and deformation displacements aredecoupled for each increment. This modified approach incorporates the geometrical nonlinearities throughthe continuous updating of the material frame geometry. A generalized nonlinear function is used toderive the inelastic constitutive relation and the kinematic hardening is considered. The equation ofmotion is integrated by an explicit procedure and it involves only vector assemblage and vector storage inthe analysis by assuming a lumped mass matrix of diagonal form. Several numerical examples aredemonstrated in close agreement with the solutions obtained by the ANSYS code. Numerical studies showthat the proposed approach is capable of investigating large deflection of inelastic planar structures andproviding an excelent numerical performance.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000855376
|
oai_dc
|
Dynamic response analysis for structures with interval parameters
|
Dynamic response analysis for structures with interval parameters
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Su Huan Chen(Jilin University); HuaDongLian(Jilin University)"
] |
parameters is presented. It is difficult to obtain all possible solutions with sharp bounds even an
optimum scheme is adopted when there are many interval structural parameters. With the interval
algorithm, the expressions of the interval stiffness matrix, damping matrix and mass matrices are
developed. Based on the matrix perturbation theory and interval extension of function, the upper and
lower bounds of dynamic response are obtained, while the sharp bounds are guaranteed by the interval
operations. A numerical example, dynamic response analysis of a box cantilever beam, is given to
illustrate the validity of the present method.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874727
|
oai_dc
|
Semi-analytical elastostatic analysis of two-dimensional domains with similar boundaries
|
Semi-analytical elastostatic analysis of two-dimensional domains with similar boundaries
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Andrew J. Deeks(The University of Western Australia)"
] |
The scaled-boundary finite element method is a novel semi-analytical technique, combiningthe advantages of the finite element and the boundary element methods with unique properties of its own.The method works by weakening the governing differential equations in one coordinate direction throughthe introduction of shape functions, then solving the weakened equations analytically in the other (radial)coordinate direction. These coordinate directions are defined by the geometry of the domain and a scalingcentre. This paper presents a general development of the scaled boundary finite-element method for two-dimensional problems where two boundaries of the solution domain are similar. Unlike three-dimensionaland axisymmetric problems of the same type, the use of logarithmic solutions of the weakened differentialequations is found to be necessary. The accuracy and efficiency of the procedure is demonstrated throughtwo examples. The first of these examples uses the standard finite element method to provide acomparable solution, while the second combines both solution techniques in a single analysis. Onesignificant application of the new technique is the generation of transition super-elements requiring fewdegrees of freedom that can connect two regions of vastly diferent levels of discretisation.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001197676
|
oai_dc
|
Identification of modal damping ratios of structures withclosely spaced modal frequencies
|
Identification of modal damping ratios of structures withclosely spaced modal frequencies
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"J. Chen(The Hong Kong Polytechnic University); Y.L.Xu(The Hong Kong Polytechnic University)"
] |
This paper explores the possibility of using a combination of the empirical modedecomposition (EMD) and the Hilbert transform (HT), termed the Hilbert-Huang transform (HT)method, to identify the modal damping ratios of the structure with closely spaced modal frequencies. Theprinciple of the HT method and the procedure of using the HT method for modal damping ratioidentification are briefly introduced first. The dynamic response of a two-degrees-of-fredom (2DOF)system under an impact load is then computed for a wide range of dynamic properties from well-separated modal frequencies to very closely spaced modal frequencies. The natural frequencies and modaldamping ratios identified by the HHT method are compared with the theoretical values and thoseidentified using the fast Fourier transform (FT) method. The results show that the HHT method issuperior to the FFT method in the identification of modal damping ratios of the structure with closelyspaced modes of vibration. Finally, a 36-storey shear building with a 4-storey light appendage, havingclosely spaced modal frequencies and subjected to an ambient ground motion, is analyzed. The modaldamping ratios identified by the HHT method in conjunction with the random decrement technique (RDT)are much better than those obtained by the FT method. The HT method performing in the frequency-time domain seems to be a promising tool for system identification of civil engineering structures.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART000874718
|
oai_dc
|
Fluid-structure-soil interaction analysis of cylindrical liquid storage tanks subjected to horizontal earthquake loading
|
Fluid-structure-soil interaction analysis of cylindrical liquid storage tanks subjected to horizontal earthquake loading
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Jae-Min Kim(Yosu National University); Soo-HyukChang(Korea Advanced Institute of Science & Technology); Chung-BangYun(Korea Advanced Institute of Science & Technology)"
] |
This paper presents a method of seismic analysis for a cylindrical liquid storage structureconsidering the effects of the interior fluid and exterior soil medium in the frequency domain. Thehorizontal and rocking motions of the structure are included in this study. The fluid motion is expressedin terms of analytical velocity potential functions, which can be obtained by solving the boundary valueproblem including the deformed configuration of the structure as well as the sloshing behavior of thefluid. The effect of the fluid is included in the equation of motion as the impulsive added mass and thefrequency-dependent convective added mas along the nodes on the wetted boundary of the structure. Thestructure and the near-field soil medium are represented using the axisymmetric finite elements, while thefar-field soil is modeled using dynamic infinite elements. The present method can be applied to thestructure embedded in ground as well as on ground, since it models both the soil medium and thestructure directly. For the purpose of verification, earthquake response analyses are performed on severalcases of liquid tanks on a rigid ground and on a homogeneous elastic half-space. Comparison of thepresent results with those by other methods shows good agreement. Finally, an application example of areinforced concrete tank on a horizontally layered soil with a rigid bedrock is presented to demonstratethe importance of the soil-structure interaction effects in the seismic analysis for large liquid storage tanks.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001195657
|
oai_dc
|
Iterative mesh partitioning strategy for improving the efficiency of parallel substructure finite element computations
|
Iterative mesh partitioning strategy for improving the efficiency of parallel substructure finite element computations
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Shang-Hsien Hsieh(National Taiwan University); Yuan-SenYang(National Center for Research on Earthquake Engineering); Po-LiangTsai(Military Police Headquarter)"
] |
This work presents an iterative mesh partitioning approach to improve the efficiency ofparallel substructure finite element computations. The proposed approach employs an iterative strategywith a set of empirical rules derived from the results of numerical experiments on a number of diferentfinite element meshes. The proposed approach also utilizes state-of-the-art partitioning techniques in itsiterative partitioning kernel, a cost function to estimate the computational cost of each submesh, and amechanism that adjusts element weights to redistribute elements among submeshes during iterativepartitioning to partition a mesh into submeshes (or substructures) with balanced computational workloads.In addition, actual parallel finite element structural analyses on several test examples are presented todemonstrate the effectiveness of the approach proposed herein. The results show that the proposedapproach can effectively improve the efficiency of parallel substructure finite element computations.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001197680
|
oai_dc
|
Non-conforming modes for improvement of finiteelement performance
|
Non-conforming modes for improvement of finiteelement performance
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Chang-Koon Choi(Korea Advanced Institute of Science and Technology); Tae-YeolLee(Korea Advanced Institute of Science and Technology)"
] |
This paper presents an efficiency of various non-conforming (NC) modes in development ofa series of new finite elements with the special emphasis on 4-node quadrilateral elements. The NCmodes have been used as a key scheme to improve the behaviors of various types of new finite elements,i.e., Mindlin plate bending elements, membrane elements with drilling degrees of fredom, flat shelelements. The NC modes are classified into three groups according to the correction constantsof irectModification Method. The first group is asic NC modes, which have been widely used by a numberof researchers in the finite element communities. The basic NC modes are effective to improve thebehaviors of regular shaped elements. The second group is ierarchical NC modes which improve thebehaviors of distorted elements effectively. The last group is igher order NC modes which improve thebehaviors of plate-bending elements. When the basic NC modes are combined with hierarchical or higherorder NC modes, the elements become insensitive to mesh distortions. When the membrane component ofa flat shell has hierarchical NC modes the membrane locking can be suppressed. A number ofnumerical tests are carried out to show the positive effect of aforementioned various NC modesincorporated into various types of finite elements.
|
토목공학
| null |
kci_detailed_000083.xml
|
|||
ART001002108
|
oai_dc
|
Efficient models for analysis of a multistory structure with flexible wings
|
Efficient models for analysis of a multistory structure with flexible wings
|
{
"journal_name": "국제구조공학회",
"publisher": null,
"pub_year": null,
"pub_month": null,
"volume": null,
"issue": null
}
|
[
"Seong-Kwon Moon(Kyungsan University); Dong-GuenLee(성균관대학교)"
] |
This study lays emphasis on the development of efficient analytical models for a multistorystructure with wings, including the in-plane deformation of floor slabs. For this purpose, a multistorystructure with wings is regarded as the combination of multistory structures with rectangular plan andtheir junctions. In addition, a multistory structure with a rectangular plan is considered to be anassemblage of two-dimensional frames and floor slabs connecting two adjacent frames at each floor level.This modeling concept can be easily applied to multistory structures with plans in the shape of L, T, Y,U, H, etc. To represent the in-plane deformation of floor slabs efficiently, a two-dimensional frame andthe floor slab connecting two adjacent frames at each flor level are modeled as a stick model with twodegrees of fredom per floor and a stiff beam with shear deformations, respectively. Three models areused to investigate the effect of in-plane deformation of the floor slab at the junction of wings on theseismic behavior of structures. Based on the comparison of dynamic analysis results obtained using theproposed models and three-dimensional finite element models, it could be concluded that the proposedmodels can be used as an efficient tool for an approximate analysis of a multistory structure with wings.
|
토목공학
| null |
kci_detailed_000084.xml
|
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