Most of the finite element analyses of reinforced concrete structures are restricted to two-dimensional elements. Three-dimensional solid elements have rarely been used although nearly all reinforced concrete structures are under a triaxial stress state. In this work, a three-dimensional solid element based on a smeared fixed crack model that has been used in the past mainly for monotonic static loading analysis is extended to cater for dynamic analysis. The only material parameter that needs to be input for this model is the uniaxial compressive strength of concrete. Steel bars are modelled as uniaxial elements and an embedded formulation allows them to have any orientation inside the concrete elements. The proposed strategy for loading or unloading renders a numerical procedure which is stable and efficient. The whole process is applied to two RC frames and compared against existing experiments in the literature. Results show that the proposed approach may adequately be used to predict the dynamic response of a structure. Copyright © 2005 John Wiley & Sons, Ltd.

An efficient three‐dimensional solid finite element dynamic analysis of reinforced concrete structures

Accurate and computationally efficient nonlinear static and dynamic analysis of reinforced concrete structures considering damage factors

This study performed seismic analyses of reinforced concrete structures using the finite element method. Two shake table tests were simulated: a test of a lightly reinforced concrete three story frame building, and a test of a seismically designed shear wall. An investigation was performed on the effects of modeling boundary conditions and of considering the initial micro-cracking of concrete on natural frequency change. The parameters are then used to calibrate finite element models to experimental models. The paper provides information on the results of the analyses of both structures.

Simulation strategies to predict seismic response of rc structures. in: finite element analysis of reinforced concrete structures

Seismic analyses of reinforced concrete frame structures are performed using the finite element method to identify and propose efficient modeling strategies for the development of fragility information for frame structures. For efficient analysis, an approach of concentrating nonlinearity into possible failure sections while other portions of the simulation model remain elastic is suggested. The method is applied to a frame structure by inserting cohesive interface elements at failure sections and calibrating the constitutive model for the interface elements. Two shake table tests of a lightly reinforced concrete 3-story frame building are simu­ lated to investigate the accuracy and efficiency of the suggested modeling strategy for the reinforced concrete frame buildings.

T. S. Han

Papers

Simulation strategies to predict seismic response of rc structures. in: finite element analysis of reinforced concrete structures

Simulation strategies for RC buildings under seismic loading