大跨度杂交结构弹塑性极限承载力分析  

Elastoplastic Ultimate Capacity Analysis of Long-span Structure

作　　者：程鹏 

机构地区：[1]张家口市交通局,河北张家口075000

出　　处：《河北工业大学学报》2009年第4期115-118,共4页Journal of Hebei University of Technology

摘　　要：内力重分布能力是大跨度空间结构工作性能和安全性能分析的新角度.对新型大跨度张弦网壳杂交结构进行弹塑性极限承载力分析,分析了完好结构和存在局部失效构件的张弦网壳结构极限承载力、荷载传递路径、内力重分布规律,并探讨了"冗余构件"与"必要构件"的转化问题.确定了结构的塑性发展过程和极限状态,总结了大跨度空间结构的内力重分布规律.构件失效后结构的内力重分布能力反应了构件的重要性和结构的安全性.Analysis of redistribution of inner force is a new perspective to analyze the performance and safety of longspan hybrid spatial structure. Long-span cable-strut supported shell structure of a new type is taken as an anlysis object. Elastoplastic ultimate capacity analyses of cable-strut supported shell structures without and with some element failing to work are made. Ultimate capacity of the structures, distribution pass of load and redistionbution of inner force are clear after the analysis. The relationship between redundant member and indispensable member are discussed. The development of plasticity, the ultimate state and the redistribution of inner force in the long-span spatial structures is summarized. The capacity of the redistribution of inner force represents the importance ofstructral member and the safety of whole structure.

关 键 词：内力重分布 大跨度空间结构 张弦网壳结构 弹塑性极限承载力分析 

分 类 号：TU393.3[建筑科学—结构工程]