Aiming at the problem of excessive acceleration response of steel structure under seismic excitation,a solution of applying shape memory alloy(SMA)to tuned mass damper(TMD)device was introduced.The characteristics of SMA were used to achieve effective self-centering and stable damping.The pre-strained SMA rod was applied to TMD to improve the damping performance of the device.Through experimental test and finite element simulation,the seismic performance of steel frame with pre-strained SMA-TMD was studied.The results show that the pre-strained SMA rod is not only helpful for self-centering,but also can greatly improve the equivalent viscous damping ratio of SMA-TMD.The optimized SMA-TMD device can greatly reduce the ground motion response of the steel frame and accelerate the seismic energy consumption.
关键词
钢框架/形状记忆合金/调谐质量阻尼器/预应变/振动与控制/抗震性能
Key words
steel frame/shape memory alloy/tuned mass damper/pre-strain/vibration and control/seismic performance
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