基于IDARC的RC剪力墙Park恢复力模型参数修正-《建筑科学与工程学报》

文章信息/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

摘要:: 使用IDARC非线性分析程序对RC剪力墙构件进行拟静力反复加载非线性分析，研究Park恢复力模型4个参数对剪力墙构件强度、刚度、卸载刚度、耗能和等效粘滞阻尼的影响规律及影响程度。将修正后的参数运用于剪力墙低周往复荷载试验的数值模拟，得到的结果与试验结果较为吻合，并根据得到的数据提出了针对RC剪力墙构件的Park恢复力模型参数建议取值范围。研究结果表明：刚度退化参数α对剪力墙构件的卸载刚度、耗能及等效粘滞阻尼有较大影响；基于延性的强度退化参数β1对构件的强度影响较大，对耗能及等效粘滞阻尼有中度影响；基于能量的强度退化参数β2对构件的各项抗震指标均有轻微影响；滑移退化参数γ对构件的耗能及等效粘滞阻尼有较大影响。

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.