SMA智能控制装置及结构地震反应控制分析

SMA smart control device and analysis on seismic control of structure

为了获得一种性能优良的结构抗震用控制装置,通过利用SMA(Shape Memory Alloy)弹性模量随温度变化特性,设计了一种新型SMA智能控制装置,并给出了SMA智能控制装置最大输出控制力和等效刚度的计算公式。最后,针对某3层框架结构,分别在未控、主动控制和SMA智能控制3种情况下,进行了地震时程仿真分析。计算结果表明:SMA智能控制装置可以有效降低结构地震反应幅值,控制效果接近主动控制效果,是一种较好的结构抗震用控制装置。

In order to get a good seismic control device for structure, a new SMA smart control device based on the change in the elastic modulus at different temperature is designed. The equations of output force and equivalent stiffness are also presented. The simulation analysis on seismic response of three- floor frame at the three states of without control, active control, SMA smart control, is carried out. The results show that the SMA smart device can reduce the seismic response of structure effectively, whose control effect is very close to active control. It is a good control device for structure.