中文摘要：

为研究新型预压弹簧自恢复耗能支撑结构的自恢复性能和耗能性能,对预压弹簧自恢复耗能支撑在低周往复荷载作用下的滞回特性进行了模拟研究,分析了自恢复耗能支撑旗形滞回曲线的特点,给出了支撑恢复力的计算方法,建立了基于Bouc-Wen模型的预压弹簧自恢复耗能支撑恢复力模型,并与ANSYS数值模拟结果进行了对比,结果表明建立的恢复力模型可准确模拟支撑在动力荷载作用下的力学性能。恢复力-位移曲线整体吻合程度较高,该恢复力模型对自恢复耗能支撑结构的设计及抗震性能研究具有较好的参考价值。

英文摘要：

To evaluate the self-centering performance and energy dissipation capacity of the pre-pressed spring self-centering energy dissipation （PS-SCED） brace, the hysteretic behaviors of PS-SCED brace under horizontal low cyclic loads are simulated and analyzed. Furthermore, the equations governing the responses of the PS-SCED bracing system are provided after analyzing the characteristics of flag-shaped hysteretic responses, and the restoring force model of PS-SCED brace is proposed based on the Bouc-Wen model. Comparisons between the proposed model and the simulation results by ANSYS are conducted to demonstrate the accuracy of the proposed model, showing that the proposed restoring force model is accurate enough to describe the mechanical performance of PS-SCED brace under dynamic loads, and good agreements between the calculated results by the proposed model and simulated results by ANSYS are observed. The proposed model has an important reference value for the seismic analysis and design of self-centering energy dissipation braced frame structures.