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为了改善传统约束屈曲支撑的不足,提出双T型内核与角钢约束机构共同构成的新型约束屈曲支撑。利用有限元分析软件ANSYS,建立该新型约束屈曲支撑有限元分析模型,并对其进行低周反复荷载全过程非线性有限元分析。主要考察芯材与约束机构间的间隙、约束刚度、连接段以及过渡段长度等主要参数对其滞回性能的影响,并给出各参数的建议取值,为新型约束屈曲支撑设计提供参考。
In order to improve the shortcomings of traditional buckling restraint, a new restrained buckling brace composed of double T core and angle restraint mechanism is proposed. The finite element analysis software ANSYS was used to establish the finite element analysis model of restrained buckling brace, and the nonlinear finite element analysis of the whole process of low cycle repeated load was carried out. The influences of the main parameters such as the clearance between the core material and the restraining mechanism, the restraining stiffness, the connecting section and the length of the transition section on the hysteretic performance are mainly investigated. The proposed values for each parameter are given, which will provide reference for the new constrained buckling design.