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为了建立新型钢连梁混合联肢墙节点的恢复力模型,进行了3个足尺的、连梁为剪切屈服型的混合联肢墙节点的低周往复加载试验,试验参数包括跨高比和面承载板的设置。得到了新型混合联肢墙节点在低周反复荷载作用下的滞回曲线、骨架曲线、强度退化规律和刚度退化规律。试验结果表明:新型钢连梁混合联肢墙节点抗震性能良好,其性能类似于偏心支撑钢框架耗能梁段。基于试验数据,采用回归分析的方法建立了新型钢连梁混合联肢墙节点的恢复力模型。对比分析表明,该模型的计算结果与试验结果吻合良好。
In order to establish the restoring force model of the joint of new steel-concrete beam bridge, three full-scale low-frequency reciprocating loading tests were carried out on the joints of the combined limbs with shear beam yielding. The test parameters include the ratio of cross-height And the surface of the carrier plate settings. The hysteresis curve, the skeleton curve, the strength degradation and the stiffness degradation of the new typed composite wall joint under low cyclic loading were obtained. The experimental results show that the joints of the new type steel-concrete composite beam joint wall have good seismic performance and the performance is similar to that of the eccentric beam-supported steel frame. Based on the experimental data, the restoring force model of the joint of the new type steel-concrete composite beam joint was established by regression analysis. The comparative analysis shows that the calculated results of the model are in good agreement with the experimental results.