低周往复荷载作用下钢管煤矸石混凝土梁柱节点抗震性能的有限元分析

摘要

The seismic performance of joints steel beam to gangue concrete filled steel tubular column under reversed low cyclic loads is analyzed based on the finite element analysis software (ABAQUS) in this paper.The constitutive relationships of steel and gangue concrete and the interface model between the tubes and the core concrete are presented. The lateral load versus lateral displacement curve of joints is analyzed and calculated. The simulated hysteretic curve illustrates that there are the characteristics of spindle - shaped, no significant decline in stiffness and the better fatness of hysteresis loop. The ductility coefficient respectively is 3.40 and 3.25. The energy dissipation coefficient respectively is 2. 35 and 2. 13, and the joints show a good dissipation energy performance and ductility. The results show that the steel beam to column joints have good seismic performance.%目的 研究钢管煤矸石混凝土柱-钢梁节点的力学性能,以期满足工程设计的抗震要求.方法 基于非线性有限元软件ABAQUS建立了实体模型对钢管煤矸石混凝土柱-钢梁节点进行数值分析,给出了有限元计算中钢材和混凝土本构关系模型,钢管及其核心混凝土之间界面模型等确定方法,计算和分析梁柱节点的荷载-变形全过程曲线.结果 计算得到的滞回曲线成纺锤形,无明显刚度退化,滞回环饱满,延性系数分别为3.40和3.25,能量耗散系数分别为2.35和2.13.节点表现出良好的延性和耗能性能.结论 钢管煤矸石混凝土柱-钢梁节点具有优越的抗震性能.