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提出了一种装配式零初始索力摩擦耗能复位支撑(FZFRB),该支撑具有简单的构造形式,既能在震后为结构提供回复力,又能避免索体预应力损失。设计了两个试件,并对其力学性能进行了数值模拟和拟静力试验研究。结果表明:该支撑采用的两组初始索力为零的镀锌钢丝绳索体交替受力、传力杆带动黄铜-槽孔钢摩擦板耗能器耗能的构造形式切实可行;该支撑在受力过程中无刚度退化现象,滞回曲线饱满,耗能规律稳定;数值模拟与试验得到的滞回曲线吻合较好;当支撑复位停止后,放松黄铜-槽孔钢摩擦板耗能器中高强应变螺栓,使支撑继续复位至位移零点时的残余荷载仅为-0.12 k N,说明支撑具有很好的复位功能。
A prefabricated zero-initial-line-force frictional energy-return support (FZFRB) is proposed. The support has a simple structure, which can not only provide the structure with restoring force after the earthquake, but also can avoid the pre-stress loss of the cable body. Two specimens were designed and their mechanical properties were simulated and simulated. The results show that the two groups of galvanized steel wire rope bodies with zero initial cable tension are alternately subjected to force, and the bracing lever drives the brass-slot hole steel friction plate. The energy consumption of the energy consuming device is feasible; the support is There is no stiffness degradation during the loading process. The hysteresis curve is full and the energy consumption law is stable. The hysteresis curve obtained by numerical simulation agrees well with the experiment; when the support reset stops, the brass-slot hole steel friction plate energy absorber is relaxed. In the medium and high strength strain bolts, the residual load when the support is continuously reset to the displacement zero is only -0.12 kN, indicating that the support has a good reset function.