活性粉末混凝土空心桥墩恢复力模型试验研究

摘要

通过5个大比例尺活性粉末混凝土空心桥墩试件的低周反复荷载试验,对试件的破坏形态、滞回特性进行研究.在对桥墩试件骨架曲线特点进行分析的基础上,考虑影响恢复力模型的主要因素,利用数值回归分析的方法,建立活性粉末混凝土空心桥墩的退化双线性恢复力模型.利用基于平截面假定的条带法程序对空心桥墩试件的骨架曲线进行数值模拟,并与试验结果进行比较,结果表明:数值模拟结果与试验结果吻合较好,研究成果可为活性粉末混凝土空心桥墩的抗震设计提供理论参考.%Low cyclic loading tests of five large-scale rectangular RPC hollow pier specimens were made and the failure patterns and hysteretic properties of the specimens were studied.The characteristics of the skeleton curves of the specimens were analyzed, those factors affecting the restoring force models of the specimens were considered and the numerical regressive analysis method was used.Then the bilinear degradation restoring force model of RPC hollow piers is established.Numerical simulation analysis was performed with the program compiled with the strip method, and the calculation results agree well with the experimental results.The research results may serve as theoretical references for seismic design of RPC hollow piers.