预制装配式钢骨混凝土柱抗震性能非线性分析

Nonlinear analysis of seismic behavior of prefabricated steel reinforced concrete columns

为研究一种新型预制装配式钢骨混凝土柱(Prefabricated Steel Reinforced Concrete Column,PSRCC)的抗震性能,设计了6个预制装配式钢骨混凝土柱试件并进行了拟静力仿真试验。通过ABAQUS分析了参数变量对预制柱滞回曲线、骨架曲线、延性、能量耗散及刚度退化的影响规律。参数变量包括加载方向、加劲板厚度及方钢管厚度。分析结果表明:各试件的滞回曲线均较为饱满,刚度退化性能稳定,具有良好的耗能能力和延性性能,平均延性系数在11.08-14.45之间,等效黏滞阻尼系数在0.256-0.304之间。改变加载方向对预制柱的承载力影响较小,但对初始刚度和延性影响明显;加劲板厚度与方钢管厚度对预制柱的初始刚度和承载力的影响明显,而对于耗能能力和刚度退化的影响相对较小。

To investigated the seismic performance of a new prefabricated steel reinforced concrete column(PSRCC),six specimens of prefabricated steel reinforced concrete column were designed and simulated.The influence of parameters on the hysteretic curve,skeleton curve,ductility,energy dissipation and stiffness degradation of PSRCC is analyzed by ABAQUS.The parameters include loading direction,stiffener thickness and square steel tube thickness.The results show that the hysteretic curves of the specimens are full,the stiffness degradation performance is stable,and they have good energy dissipation capacity and ductility performance.The average ductility coefficient is between 11.08-14.45,and the equivalent viscous damping coefficient is between 0.256-0.304.The change of loading direction has little effect on the bearing capacity of PSRCC,but has obvious effect on the initial stiffness and ductility.The thickness of stiffening plate and square steel tube have obvious influence on the initial stiffness and bearing capacity of PSRCC,but have little influence on the energy dissipation capacity and stiffness degradation.