不同加载制度下型钢混凝土框架抗震性能对比

COMPARATIVE ANALYSIS OF SEISMIC PERFORMANCE OF STEEL REINFORCED CONCRETE FRAME WITHDIFFERENTLOADINGPROCESS

为研究不同加载制度对型钢混凝土框架抗震性能的影响规律,文中采用屈服位移加载制度、位移角加载制度和最大变形幅值百分比加载制度对型钢混凝土框架模型进行了模拟低周反复加载试验。对比分析了三种加载制度下模型骨架曲线、刚度退化、能量耗散系数以及等效粘滞阻尼系数的变化规律。分析结果表明,三种不同加载制度下所得到的型钢混凝土框架各项抗震指标接近,峰值荷载误差为2%以内,刚度退化方面走势基本相同,初始刚度、残余刚度与试验值相对误差在30%以内,而耗能变化规律基本一致,均高于试验值。基于文中分析结果,位移角加载制度更优。

In order to study the influence of different loading systems on the seismic performance of steel reinforced concrete frames,a simulated low cycle repeated loading test is conducted on the steel reinforced concrete frame mod-el using yield displacement loading system,displacement angle loading system,and maximum deformation ampli-tude percentage loading system.Comparative analysis is conducted on the changes in the skeleton curve,stiffness degradation,energy dissipation coefficient,and equivalent viscous damping coefficient of the model under three dif-ferent loading systems.The results show that the seismic indicators of the steel reinforced concrete frame obtained under three different loading systems are similar,with a peak load error of less than 2%.The trend of stiffness degra-dation is basically the same,and the relative errors of initial stiffness and residual stiffness with experimental values are within 30%.