短程线网壳结构强震作用下的动力强度破坏  

Dynamic strength failure of geodesic latticed shells subjected to severe earthquake actions

作　　者：杨飏[1] 支旭东[1] 范峰[1] 沈世钊[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2008年第12期1878-1882,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(50338010)

摘　　要：为对短程线型单层球面网壳结构进行强震作用下的动力全过程分析,研究了结构的失效机理.对40m跨的短程线型理想网壳结构和考虑初始缺陷的网壳结构进行全过程动力时程分析,考查了此类型网壳结构的动力性能和破坏形式,采用一致缺陷模态法处理初始缺陷,分析初始缺陷对短程线网壳结构动力性能的影响;对具有初始缺陷的网壳结构进行了参数影响分析,分别考查地震作用、杆件截面和屋面荷载三种因素对结构动力性能的影响,研究在不同条件下短程线网壳结构的动力失效机理和破坏模式;将研究结果与其它球面网壳结构进行了比较,验证了已提出的理论框架的合理性和实用性.The failure mechanism of single - layer geodesic latticed shells subject to severe earthquake actions was studied. Perfect and imperfect models of geodesic latticed shells with span of 40m were calculated through full process dynamic analysis. Dynamic performance and failure model of this kind of shells were examined. Effects of initial imperfection, calculated by accordant imperfect mode method, on the dynamic performance of imperfect shells were analyzed. Effects of earthquake actions, element section and roof loads on the dynamic performance of imperfect shells were investigated as well. In addition, the dynamic failure mechanism and failure mode were studied with different parameters. Results obtained were compared with those of other sphere shells. It is indicated that the suggested theoretical procedure is effective and reasonable.

关 键 词：短程线型单层网壳 地震作用 失效机理 动力分析 强度破坏 

分 类 号：TU393.3[建筑科学—结构工程]