罕遇地震下大跨张弦屋盖的隔震分析  

Isolated Behavior Analysis on Large-span String Structure under Rare Earthquake

作　　者：赵楠[1] 

机构地区：[1]北京市建筑设计研究院有限公司,北京100045

出　　处：《工程抗震与加固改造》2013年第3期62-66,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：新疆克拉玛依市科技计划项目(sk2010-31)

摘　　要：结合克拉玛依市科技博物馆大跨度张弦屋盖,运用非线性基本理论对空间张弦结构采用隔震措施后的三维地震反应进行了研究。地面地震输入经竖向钢筋混凝土构件传导后具有放大效应,隔震支座对水平地震作用有较大改善。罕遇地震下的竖向振动对空间张弦结构有较大影响,拉索、框架单元及楼板壳单元的应力较之重力荷载状态均有较大提高。非线性时程分析表明,单元应力仍在弹性范围内,空间张弦结构采用隔震措施后在罕遇地震下是安全可靠的。Combined with the project of Science and Technology Museum in Kelamayi, Three dimensional seismic responses of an isolated spatial beam string structure are studied by applying the non-linear finite element theory. The filtering effect of the main structure, which amplifies the ground input, is investigated. The results indicate that the vertical rare earthquake has great influence on the isolated spatial beam string structure, and stresses of cables, frames and slab shells under vertical rare earthquake are all much greater than that under gravity load. Results of non-linear time history analysis show that the structure keeps safe under rare earthquake.

关 键 词：有限元 张弦梁 预应力 隔震 

分 类 号：TU399[建筑科学—结构工程] TU352.12