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为了解地震作用下型钢高强高性能混凝土框架梁柱节点的滞回性能和恢复力特性,进行了5榀1∶4比例不同混凝土强度等级、不同轴压比的框架中节点低周反复加载试验。在试验所获得的滞回曲线和骨架曲线的基础上建立了适合于型钢高强高性能混凝土框架节点的考虑刚度退化的三线型恢复力模型。该恢复力模型包括一条基于计算的三折线骨架曲线模型、刚度退化规律以及基于试验现象的滞回规则。所提出的恢复力模型能较好地反映试件的滞回性能,可供型钢高强高性能混凝土框架节点及其结构在进行弹塑性地震反应分析时参考。
In order to understand the hysteretic behavior and restoring force of beam-column joints of SRHCF under seismic loading, the low-cycle repeated loading test of joints with different concrete strength grades and different axial compression ratios in 5 榀 1: 4 ratio was carried out . Based on the hysteresis curves and the skeleton curves obtained from the experiments, a three-line model of restoring force considering the stiffness degradation is established for the joints of high-strength high-strength concrete frames. The restoring force model includes a calculated three-fold line skeleton curve model, stiffness degradation and hysteretic rules based on experimental phenomena. The proposed model of restoring force can well reflect the hysteretic behavior of specimens. It can be used as a reference for elasto-plastic seismic response analysis of steel-framed HSC frames.