新型形状记忆合金阻尼器在古塔抗震加固中的应用与优化分析

摘要

利用形状记忆合金(SMA)的超弹性滞回耗能特性,根据古塔的受力和主要灾变特点设计提出一种适合古塔的新型SMA阻尼器.通过试验得出该阻尼器的双线性恢复力模型,利用MATLAB提供的Simulink模块建立仿真模型,数值分析某古塔模型原型结构和加SMA阻尼器结构的地震反应.仿真结果表明:新型SMA阻尼器能有效降低古塔的地震反应.并对新型SMA阻尼器在古塔中布置的数量和位置进行了优化分析,为SMA阻尼器被动控制系统在古塔等类似古建筑结构中的实际应用和设计提供借鉴.%Shape memory alloy (SMA) has super-elastic hysteresis behavior. Recognizing this, a new type SMA damper which is fit for ancient tower is proposed. The bi-linear restoring force model of the new type SMA damper is determined by experiment. A simulation model is built by using the Simulink block in MATLAB. And the seismic responses of an ancient tower model are investigated under the antetype structure and the structure installed the SMA damper. Simulation results show that the SMA damper can reduce seismic response of the ancient tower effectively. Through the optimization analysis of different quantity and location of the SMA damper in the ancient tower, it provides reference of application and design in SMA damper passive control system for ancient tower and similarly ancient architectures.