论文部分内容阅读
进行了3榀方钢管混凝土柱-钢梁平面框架的低周反复加载试验,分析了轴压比和梁柱线刚度比对框架抗震性能的影响。得到了框架的荷载-位移滞回曲线、骨架曲线及各阶段的荷载和位移值,分析了框架的破坏特征、延性、耗能能力、承载能力及刚度退化。试验结果表明:框架滞回曲线饱满,具有良好的变形性能和耗能能力;增大轴压比将降低框架的延性和水平极限承载力,提高框架的耗能能力;增大梁柱线刚度比将降低框架的延性和耗能能力,提高框架的水平极限承载力。试验结果可为方钢管混凝土柱-钢梁框架的工程应用提供参考。
The low-cycle repeated loading test of 3 CFST column-steel beam plane frame was carried out. The influence of axial compression ratio and beam-column line stiffness ratio on the seismic performance of the frame was analyzed. The load-displacement hysteresis curve, the skeleton curve and the loads and displacements of the frame are obtained. The failure characteristics, ductility, energy dissipation capacity, load carrying capacity and stiffness degradation of the frame are analyzed. The experimental results show that the hysteresis curve of the frame is full and has good deformation performance and energy dissipation capacity. Increasing the axial compression ratio will reduce the ductility and horizontal ultimate bearing capacity of the frame and improve the energy dissipation capacity of the frame. Reduce the ductility and energy consumption of the frame, and improve the horizontal ultimate bearing capacity of the frame. The test results can provide reference for the engineering application of square steel tube concrete column-steel beam frame.