空间网格结构连续倒塌分析的瞬时移除构件法  

Instantaneous Component-Removing Method for Analysis of Progressive Collapse of Space Grid Structure

作　　者：丁阳[1,2] 葛金刚[1] 李忠献[1,2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]滨海土木工程结构与安全教育部重点实验室(天津大学),天津300072

出　　处：《天津大学学报》2011年第6期471-476,共6页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基金重大研究计划重点项目(90715034);国家自然科学基金资助项目(50978181);教育部新世纪优秀人才支持计划资助项目(NCET-06-0229);天津市应用基础及前沿技术研究计划资助项目(09JCZDJC25200)

摘　　要：用于连续倒塌分析的多传递路径法忽略了构件失效的成因、机理和对剩余结构的动力效应,且需假定构件失效位置,不适用于杆件众多的空间网格结构.以损伤累积作为构件失效判别准则,考虑材料非线性和几何非线性,提出实时删除失效构件的瞬时移除构件法.采用动力非线性分析,对比双杆模型和悬臂梁节点位移,验证瞬时移除构件法的正确性.考虑杆件失稳和损伤累积对地震作用下单层柱面网壳进行连续倒塌分析,结果表明,瞬时移除构件法简单有效,可应用于空间网格结构连续倒塌分析.Since alternate path method applied to progressive collapse neglected the cause and mechanism of compo-nent failure and structural dynamic effect caused by component failure,and needed to assume the position of compo-nent failure,it was not suitable for space grid structure with many members.Based on the cumulative damage as the criterion of component failure,instantaneous component-removing method considering geometric nonlinearity and material nonlinearity was proposed to remove disabled component.Dynamic nonlinearity analysis was applied to dou-ble members and cantilever,and the node displacements were compared to certify the correctness of instantaneous component-removing method.Considering cumulative damage and instability of member,progressive collapse of sin-gle-layer latticed cylindrical shell in an earthquake was analyzed.The analysis results indicate that instantaneous component-removing method is simple and useful,and can be used in the analysis of progressive collapse of space grid structure.

关 键 词：连续倒塌 移除构件 损伤累积 杆件失稳 

分 类 号：TU356[建筑科学—结构工程]