This study attempts to expand the application of the conventional 2D lattice model, which can express the shear resisting mechanism of RC structural members, to a 3D analytical model. Use of a 3D lattice model for the simulation of torsional and biaxial responses of RC structural members is presented. The results of static analysis are compared with several sets of experimental results for RC beams/columns subjected to pure torsion or cyclic combined loads of torsion and bending. In addition, the dynamic analysis of RC columns subjected to bilateral seismic loading is carried out. The applicability of 3D lattice model to the response prediction of RC structural members under 3D loading is examined by comparing analytical and experimental results.

In order to study the effects of the bilateral excitation on response characteristics of the reinforced concrete (RC) column, shaking table tests and the dynamic analyses using fiber element model were carried out. The test results showed that the failure of the cover concrete and the buckling of the longitudinal reinforcement were developed in the 4 surfaces in the case of bilateral excitation. It was also found that the dynamic analysis using fiber element model could simulate the experimental...

The authors have developed a lattice model, which can be considered a simplified analytical model, to clarify the changes in the shear resisting mechanism of reinforced concrete beams during, for example, the initiation of diagonal cracking, yielding of the shear reinforcement, and crushing of the web concrete. This is a practical and macroscopic analytical model to explain the shear resisting mechanism. The applicability of this lattice model is examined by shear strength equations proposed in ...

#2M. J. N. Priestley(UCSD: University of California, San Diego)H-Index: 12

A stress‐strain model is developed for concrete subjected to uniaxial compressive loading and confined by transverse reinforcement. The concrete section may contain any general type of confining steel: either spiral or circular hoops; or rectangular hoops with or without supplementary cross ties. These cross ties can have either equal or unequal confining stresses along each of the transverse axes. A single equation is used for the stress‐strain equation. The model allows for cyclic loading and ...

Last. Jin-Sup Kim(Gyeongsang National University)H-Index: 5

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In this study, a 4-node lattice element was formulated based on the general lattice model. The experimental program was conducted to verify the 4-node lattice element analysis. In the experimental program, four kinds of RC beam-column specimens were constructed. Anchorage shapes of beam and bonding interfaces between the reinforcement and concrete in the beam part were used as parameters of the specimen. The material properties of unbonded reinforcement used in the 4-node lattice element analysi...

Seismic performance evaluation of non-seismically detailed reinforced concrete buildings requires proper analytical modeling approaches for beam-column joints which are most vulnerable parts. This study investigates the influence of beam column joint modeling assumptions on performance evaluation of non-ductile RC buildings. Numerical simulation model includes truss-based elements for beam-column connections and fiber-based elements for beams and columns. Two-dimensional four- and six- story rei...

#2Danilo Tarquini(EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 4

Last. Katrin Beyer(EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 22

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The severe damage and collapse of many reinforced concrete (RC) wall buildings in the recent earthquakes of Chile (2010) and New Zealand (2011) have shown that RC walls did not perform as well as required by the modern codes of both countries. It seems therefore appropriate to intensify research efforts towards more accurate simulations of damage indicators, in particular local engineering demand parameters such as material strains, which are central to the application of performance-based earth...

Summary This paper uses nonlinear truss models for the analysis of shear-dominated reinforced concrete (RC) columns subjected to cyclic loading. A previously established method, aimed to the analysis of RC walls, is enhanced to allow simulations of column members. The concrete constitutive equations are modified to account for the contribution of the aggregate interlock to the shear resistance. Additionally, an equation is proposed to determine the inclination angle of the diagonal members in th...

Author(s): Mavros, Marios | Advisor(s): Shing, Benson P | Abstract: This study is to acquire a better understanding of the seismic performance of reinforced masonry structures at the system level, and develop reliable computational models that can predict the performance of these structures. To this end, a nonlinear finite element modeling scheme has been developed and a two-story reinforced masonry shear wall structure was tested on a shake-table. This structure had door and window openings and...

AbstractA three-dimensional nonlinear cyclic model for nonplanar reinforced concrete walls is presented. Nonlinear Euler-Bernoulli fiber-section beam elements are used to represent steel and concrete in the vertical direction, and nonlinear trusses are used to represent the steel and concrete in the horizontal direction and the concrete in the diagonal directions. The model represents the effects of flexure-shear interaction by computing the stress and strains in the horizontal and vertical dire...

Because of earthquakes that have recently struck, seismic design criteria that considered performance of structure were included in the design concepts. Thus, a simple analysis tool is needed to predict the strength and ductility of RC structures. In this study, three-dimensional lattice model was developed to expand the two-dimensional lattice model. Torsional analysis of the structure was done to evaluate the developed three-dimensional lattice model. Lattice model was evaluated by comparing a...

This paper presents three-dimensional finite element (FE) analyses of an all-frame model of a three-story reinforced concrete (RC) building damaged in the 1999 Taiwan Chi-Chi Earthquake. Non-structural brick walls of the building acted as a seismic resistant element although their contributions were neglected in the design. Hence, the entire structure of a typical frame was modeled and static and dynamic nonlinear analyses were conducted to evaluate the contributions of the brick walls. However,...