开孔核心管约束屈曲支撑滞回性能分析

摘要

核心管带开孔双钢管约束屈曲支撑是一种新型的约束屈曲支撑,是对双钢管约束屈曲支撑的改进.基于有限元理论,建立核心管带开孔双钢管约束屈曲支撑的有限元模型,通过对其进行ANSYS有限元模拟计算与分析,得出该种截面形式约束屈曲支撑的滞回曲线和骨架曲线.结果表明这种约束屈曲支撑具有良好的耗能能力和恢复力特征,而且改善了常用约束屈曲支撑所出现的连接困难等问题.为了比较不同开孔数量对该种类型支撑的影响,建立了不同的模型进行对比分析.%The buckling restricted brace with holed kernel tube in double-steel-tube is a new buckling-re-strained brace (BRB), being a refinement for the double-tube buckling restrained brace. Based on the theory of finite element, a finite element entity model of buckling restraining brace with holed kernel tube in double-tube was developed. By using ANSYS, a finite element computation and analysis was made for it and its hysteresis curve and skeleton curve were obtained. The analysis result indicated that this kind of buckling restrained brace had good energy dissipation ability and force restoring characteristics. In addition, the difficulty in connecting the common buckling-restrained braces was avoided. In order to compare and analyze the influence of the number of the holes on this kind of supporting, different models of this type of brace were developed.