基于OpenSees的自复位型SMA阻尼器对偏心框架结构振动控制的理论研究

Theoretical investigation into the vibration control of eccentric frame structure with re-centring SMA damper in OpenSees

基于OpenSees软件平台建立了超弹性形状记忆合金(Shape memory alloy,简称SMA)的有限元本构模型,并对其进行二次开发,以模拟材料的双向力学行为;建立了自复位型SMA阻尼器的有限元力学模型;数值研究了阻尼器控制下的一六层偏心框架结构的振动响应,结果表明:阻尼器可有效抑制结构的平动位移和扭转角响应,但会增加结构的加速度.

Constitutive model of finite element of super elastic shape memory alloy(SMA) is established in OpenSees. Bidirectional mechanical behavior of SMA material is simulated by re-development; mechanical model of finite element of re-centring SMA damper is established; vibration response of a six-storey eccentric frame structure installed re-centring SMA damper is investigated by numerical method. The results prove that re-centring SMA damper can restrain translationtorsion coupled response of structure effectively. However, it can increase acceleration of the structure.