形状记忆合金阻尼器消能减震体系的控制研究  

ENERGY DISSIPATION SYSTEM OF STRUCTURES WITH SHAPE MEMORY ALLOY DAMPER

作　　者：钱辉[1] 李宏男[1] 宋钢兵[1,2] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,大连116024 [2]美国休斯敦大学机械工程系,美国休斯敦77204

出　　处：《振动与冲击》2008年第8期42-47,共6页Journal of Vibration and Shock

基　　金：国家杰出青年科学基金(50025823);教育部创新团队(编号:IRT0518);海外青年学者合作研究基金(50328807)

摘　　要：利用奥氏体SMA丝的超弹性和阻尼特性,设计了一种新型的SMA阻尼器,试验研究了该阻尼器在循环荷载作用下的力学性能,建立了基于塑性理论的一维理论模型,并对其力学性能进行了数值模拟。采用能量平衡方法对SMA阻尼器消能减震体系的参数进行了优化,给出了消能部件参数建议取值范围。最后以一幢十层剪切型钢框架结构为算例,分析了SMA阻尼器的减震效果。结果表明:该阻尼器具有良好的滞回耗能能力,能很好地控制结构的位移反应,适用于工程结构的抗震设计和加固。A new type of shape memory alloy (SMA) damper was proposed by utilizing both the high damping and recentring features of superelastic SMA wire. The mechanical behaviors of the damper under cyclical loading-unloading were investigated experimentally, and the numerical simulation for the mechanical behaviors of the damper was performed by means of the developed one-dimensional theoretical model based on plastic theory. Then, the parameters of the energy dissipation system with SMA dampers were analyzed and optimized using energy balance method, and the reasonable value ranges for the parameters were suggested. Finally, as an example, a ten-layer shear steel frame structure with the SMA dampers was analyzed under earthquake ground motions. The research results show that the SMA damper has both the energy dissipating and recentring features with the hysteretic loop under cyclic loading-unloading. The lateral displacement of the structure is significantly reduced compared to that of the base structure without the passive element, which verifies the effectiveness of the damper for seismic design and retrofit of structures.

关 键 词：形状记忆合金 超弹性 阻尼器 地震控制 消能减震 

分 类 号：TU352[建筑科学—结构工程] P315[天文地球—地震学]