应用SMA复合橡胶支座的大跨度空间结构隔震研究  

Isolation Analysis of Long-span Spatial Structure with Shape Memory Alloys Composite Rubber Bearing

作　　者：丁阳[1] 张向荣[1] 李忠献[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《沈阳建筑大学学报（自然科学版）》2005年第5期438-444,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(50278064);天津市社会发展科技项目(043112111)

摘　　要：目的为了减小地震作用下大跨度空间结构的地震响应,笔者对采用了SMA(形状记忆合金)复合橡胶支座隔震体系的大跨度空间结构的隔震效果进行了研究.方法通过SMA材料的拉伸试验验证了SMA材料的本构模型;设计了基于SMA材料的SMA复合橡胶支座,给出了SMA复合橡胶支座的工作原理和恢复力模型;建立了一大跨度空间结构的有限元计算模型,数值分析了计算模型在地震作用下采用SMA复合橡胶支座隔震体系后的隔震效果.结果计算结果表明:采用SMA复合橡胶支座隔震体系后,大跨空间结构的竖向位移可减小70%,控制杆件内力可减小70%以上.结论表明了SMA复合橡胶支座对大跨度空间结构是一种有效的隔震体系.In the paper, the vibration control on seismic response of long-span spatial structure with SMA- composite rubber bearing is performed. A constitutive model of SMA is established through the training and the test on properties of SMA. By employing the outstanding property, a new SMA-composite rubber bearing is developed, and its model of restoring is built. The analysis model of long-span spatial structure is built based on the SMA-composite rubber bearings, and the time-history analysis of the seismic responses of isolated long-span spatial structure is performed. It is proved by numerical results that the seismic responses of the long-span spatial structure may decrease by 70 % due to the SMA-composite rubber bearing. A conclusion is drawn that the isolation system of SMA-composite rubber bearing is suitable to long-span spatial structure and its effects of isolation are excellent..

关 键 词：大跨度空间结构 SMA(形状记忆合金) 复合橡胶支座 隔震分析 

分 类 号：P315.95[天文地球—地震学] TU337[天文地球—固体地球物理学]