Investigation of concrete material models for analysis of seismic behavior of reinforced concrete under reversed cyclic load

摘要

Several concrete material models with unique theoretical backgrounds are available in different finite element analysis(FEA) software packages such as ABAQUAS, ATENA, DIANA, and LS-DYNA. In the simulation of structural responses ofconcrete using FEA software, various parameters such as strength, stiffness, softening, strain rate, and dilation are required to beprovided. Though depending on each concrete material model, all of these parameters do not hold equal importance during asingle type of loading. This paper presents the relevance of using the three most widely used concrete material models availablein LS-DYNA: Karagozian & Case Concrete (KCC) model, Winfrith Concrete Model, and Continuous Surface Cap Model(CSCM) for simulation of concrete structures under reversed cyclic loading when only limited material properties are available.In this paper, a series of nonlinear 3D-finite element analyses of non-ductile reinforced concrete (RC) column subjected to lateralcyclic loading were carried out with these three concrete models. The results from each model were compared with documentedexperimental results. The capacity of each material model to capture the cyclic load reversal behavior, softening due to cycliccompression and tension, and damages are the major foci of this paper. Based on a series of numerical analyses of an RC columnunder cyclic loading, review of a single element analysis, and a theoretical overview of each model, recommendations for theselection of an appropriate concrete material model under cyclic loading were made.