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提出一种新型H型钢预应力自复位防屈曲支撑(SCBRB),该支撑耗能内芯采用H型钢,外部约束构件由钢板和型钢组合成H形截面,采用预应力索构成自复位系统,整体通过高强螺栓拼接而成。对其构造、工作原理以及复位原理进行详细介绍。为了研究SCBRB的抗震性能,通过有限元软件ABAQUS,对结构模型进行三维实体有限元模拟,对纯防屈曲支撑、纯复位支撑及自复位防屈曲支撑进行拟静力分析,结果表明:新型H型钢预应力支撑结合了前两种支撑装置的优点,既能耗能,又能复位,可减小或消除残余变形,且效果良好。
A new type of H-section prestressed self-restoring buckling brace (SCBRB) is proposed. H-section steel is used as the energy dissipating inner core of the H-beam. The outer restraining members are combined into H-section by the steel plate and the profiled steel. Spliced by high-strength bolts. The structure, working principle and reset principle are introduced in detail. In order to study the seismic performance of SCBRB, the finite element software ABAQUS was used to simulate the structural model by three-dimensional solid finite element method. The pseudo-static analysis of the pure anti-buckling support, pure reset support and self-restoring buckling support showed that the new H- Prestressed support combined with the advantages of the first two support devices, both energy, but also reset, can reduce or eliminate residual deformation, and the effect is good.