多层空间钢网格盒式结构的连续倒塌动力效应分析

Progressive Collapse Dynamic Response Analysis of Multilayer Space Steel Grid Box structures

本文研究一种新型的结构体系——装配整体式空间钢网格盒式结构。这种结构体系主要由横向钢—混凝土协同式组合空腹夹层楼盖及竖向单层钢网格墙体组成;为了考查盒式结构抗连续倒塌的性能,建立一个五层钢网格盒式结构进行动力非线性分析,主要分析柱失效时间和层数对结构连续倒塌动力效应的影响。分析结果表明:柱失效时间、层数的变化对盒式结构的动力效应有不同程度的影响。

This paper presents a new structural system,called assembled monolithic space steel grid box structure. It consists of steel vierendeel grid slab floor and steel grid frame wall. In order to carry out the progressive collapse analysis more properly,a five-layers space steel grid box structure was built and was made dynamic effect analysis. This paper analyzed the influence of failure time and the number of layer to dynamic effect of the new structure during progressive collapse. The analytical results show that the dynamic effect has different degrees of influence with the change of failure time and the number of layer.