SMA阻尼器在土木结构被动控制中的运用

SMA Damper Used for Civil Structure Passive Control

首先确立了SMA耗能阻尼器的力学模型 ,以Brinson本构关系为理论依据 ,基于热力学第一定律建立了耗能阻尼器的热力学非线性方程 ;然后 ,建立了在耗能阻尼器作用下的框架结构动力学非线性平衡方程及其求解方法 ;最后 ,利用文章编写的仿真软件分别对耗能阻尼器的阻尼特性和框架结构的动力响应进行了实例仿真模拟。结果表明 ,SMA耗能阻尼器具有明显的阻尼特性 ;对于结构在地震作用下的动力响应具有明显的抑制效果 ,结构顶层位移、速度峰值衰减率达 5 0～ 6 0 % ;仿真结果与其他学者的试验结果吻合较好 ,表明文中所述方法的正确性与适用性。

Mechanics model of SMA damper was established, according to theory of Brinson's constitutive model and the first thermodynamics law, damper's non-linear thermodynamics equation was developed, the non-linear dynamics equation of frame structure under operation of SMA damper was constituted and solved, the software of seismic response analysis for frame structure and of damper's characteristic analysis were compiled, and the examples were computed. The result indicates that SMA damper has obvious damping characteristic and provides obvious restraint effect for seismic response of frame structure, decreasing rate of displacement and velocity on top of frame structure reaches 50～60%. The flexibility and accwracy of the proposed method are verified by the simulation.