下部支承结构对网壳结构强震响应的影响研究

总结了关于考虑下部支承影响的网壳结构强震失效研究的最新研究成果。介绍了基于响应的荷载域全过程分析方法;通过建立精细化的数值模型,对考虑下部支承结构的单层球面网壳在强震作用下的特征响应进行了分析,得到了考虑下部支承结构的单层球面网壳在强震作用下的失效特征;通过大规模参数分析,详细地阐述了下部支承结构对网壳结构失效极限荷载的影响;提出了对于耦合体系的简化分析方法并初步研究了非线性下部支承结构对网壳结构失效的影响;讨论了下部支承结构非线性对网壳结构响应的影响。研究表明,非线性材料的支承结构也将明显改变耦合体系的响应规律及失效模式。

Influence Study of Substructure upon Dynamic Responses of Reticulated Shells under Severe Earthquakes

This paper establishes the coupling system model of reticulated shell with the substructure , the full-range dynamic response analysis method is applied to investigate the failure characteristics of single-layer steel reticulated domes with substructures subjected to severe earthquaks.The influence of substructures on the failure mode and the ultimate load of reticulated domes subjected to severe earthquakes are examined ; this paper puts forward a simplified analysis method for the coupling system and discusses the influence of the nonlinear material of substructure on the failure behavior of reticulated shells ; the influence of the nonlinearity of substructure on dynamic responses are discussed.It is shown that the nonlinearity of substructure obviously changes the failure characteristics of the reticulated dome.