赵 毅1,边亚东1,王爱勤1,苏南阳2
劲性环梁式钢管混凝土节点恢复力模型
赵 毅1,边亚东1,王爱勤1,苏南阳2
摘 要:基于劲性环梁式钢管混凝土柱-钢筋混凝土梁节点的低周往复荷载试验及ABAQUS有限元数值模拟结果, 分析了节点试件的滞回特性,通过对有限元计算结果进行回归分析,考虑刚度退化的影响,提出了劲性环梁式钢管混凝土节点的三折线恢复力模型,该恢复力模型包括骨架曲线模型和具有刚度退化规律的滞回规则。最后将所提出的恢复力模型和试验所得曲线进行比较,结果符合较好。建立的恢复力模型可用于劲性环梁式钢管混凝土框架节点的弹塑性分析。
Abstract: According to the results of low cyclic loading tests and ABAQUS finite element analysis, the hysteretic characteristics of steel reinforced ring-beam connections of concrete filled steel column and RC beam are analyzed. A trilinear hysteretic restoring force model considering rigidity degradation is proposed by regression analysis of the finite element calculation results, which includes a skeleton curve model and a hysteresis rule with rigidity degradation law. The compared results show that the proposed restoring force model agrees with the test curves well. The model can be used to elastic-plastic analysis of steel reinforced ring-beam connections of concrete filled steel column frame.
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