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通过对代替黏土砖住宅结构的新型人字支撑复合结构的拟动力试验,以研究该结构的抗震性能。试验设计为1∶2缩尺的单层模型XB,竖向荷载模拟6层结构,输入El Centro波,地震动加速度峰值分别相当于7,8,9度多遇地震波和罕遇7,7.5,8度地震波。试验结果得出,该复合结构开裂、屈服及破坏的地震波分别是8度多遇、7度罕遇、8度罕遇。由试验绘出的刚度退化曲线、恢复力曲线、位移时程曲线均表明,复合结构XB具有较好的抗震性能。支撑顶部的竖向位移说明,复合结构在多遇地震作用下不需考虑竖向位移的影响,仅在支撑屈服后再承担大震时需要考虑其影响。
The quasi-dynamic test of the composite structure is carried out on a new type of herring instead of the residential structure of clay bricks to study the seismic performance of the structure. The experimental design is a 1: 2 scale monolayer model XB. The vertical load simulates a 6-layer structure and inputs El Centro waves. The peak values of earthquake acceleration are respectively equivalent to 7, 8 and 9 degree seismic waves and rare encounters of 7 and 7.5, 8 degree seismic wave. The test results show that the composite structure cracking, yielding and destruction of seismic waves are 8 degrees more than the event, rare case of 7 degrees, 8 degrees rarely encountered. The stiffness degradation curves, the restoring force curves and the displacement time history curves drawn from the experiments show that the composite structure XB has good seismic performance. The vertical displacement of the top of the support indicates that the composite structure does not need to consider the influence of vertical displacement under the action of the earthquake and the influence of the composite structure need to be considered only when the support undergoes yielding.