Abstract

Info

Title:: Parameter Modification of Park Hysteretic Model for RC Shear Walls Based on IDARC

Author(s):: LIU Cheng-qing; NI Xiang-yong; SHI Wei-xing; School of Civil Engineering, Southwest Jiaotong University

Keywords:: IDARC; parameter modification; nonlinear analysis; Park hysteretic model; RC shear wall; low cyclic loading

Abstract:: Nonlinear analysis program IDARC was used to analyze nonlinear response of reinforced concrete (RC) shear walls under quasistatic cyclic loading, and the influences of four parameters of Park hysteretic model on strength, stiffness, unloading stiffness, energy dissipation and equivalent viscous damping were researched. Based on the results of parameter modification, numerical calculation for low cyclic loading tests of shear walls was carried out, and the simulation results were in good agreement with those of tests. Then the suggested range of every parameter value was put forward for RC shear walls. The research results show that stiffness degradation parameter αhas severe influence on unloading stiffness, energy dissipation and equivalent viscous damping. Ductilitybased strength degrading parameter β1 has severe influence on strength, moderate influence on energy dissipation and equivalent viscous damping. Energybased strength degrading parameter β2 has little influence on all. Slip degradation parameter γ has severe influence on energy dissipation and equivalent viscous damping.