【摘要】 采用SMA(Shape Memory Alloy)旗帜型恢复力模型,深入分析了预变形、超弹性拉伸位移、刚度和长度4个参数对SMA阻尼器耗能系数的影响规律;分别建立了预变形、拉伸位移与耗能系数的关系式,并提出SMA阻尼器刚度和长度的确定方法。在分析结果的基础上,设计了一种新型超弹性SMA阻尼器。为了验证SMA阻尼器的减震效果,针对某5层框架结构,分析了框架结构在无控和安装SMA阻尼器两种情况下的地震反应。结果表明:安装SMA阻尼器后,框架结构顶层水平位移和加速度反应都比未控时降低50%以上,因此,SMA阻尼器可以有效抑制结构地震反应。更多还原

【Abstract】 With the SMA(Shape Memory Alloy) banner model,the effect of pre-stressing,displacement,stiffness and length to the energy dissipation ratio is studied.The two equations,which are of pre-stressing and displacement to the energy dissipation ratio are proposed.The methods are put forward to confirm the stiffness and length of SMA.Based on the above analysis,a new pull-press SMA damper is designed.The simulation analysis on seismic response of five-floor frame with SMA damper shows that the displacement and acceleration of the top floor are reduced by 50% at least.It verifies that this kind of SMA damper can availably suppress the seismic responses of structure.更多还原