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为研究传统风格建筑型钢混凝土(SRC)方柱-钢筋混凝土(RC)圆柱连接的基本抗震行为,设计了2个该类型柱连接的足尺模型试件,并对不同轴压比下的试件进行低周反复加载试验。结果表明:传统风格建筑SRC方柱-RC圆柱连接的破坏形态为典型的弯曲破坏,其抗震性能良好。破坏时SRC柱根部的型钢、箍筋和纵筋可以达到屈服,轴压比对试件的破坏形态具有重要的控制作用。根据测试结果及对试件加载过程中荷载-位移关系分析,得到了传统风格建筑SRC方柱-RC圆柱连接弹性侧移刚度的统计回归计算式,计算值与试验值吻合较好。
In order to study the basic seismic behavior of SRC column-to-column connection of RC columns, two full-scale model specimens with column connection were designed and tested under different axial compression ratios Pieces for low cycle repeated loading test. The results show that the failure mode of traditional SRC square column-RC cylinder connection is typical bending failure, and the seismic performance is good. The steel, stirrups and longitudinal reinforcement at the root of SRC column at failure can yield, and the axial compression ratio has an important control effect on the failure morphology of the specimens. According to the test results and the analysis of the load-displacement relationship during the loading process of the specimen, the statistical regression formula of the elastic lateral stiffness of SRC square column-RC cylinder connection is obtained. The calculated values are in good agreement with the experimental values.