山东农业大学学报（自然科学版）2017，Vol.48Issue(6)：837-843,7.DOI:10.3969/j.issn.1000-2324.2017.06.007
钢屋架体系连续倒塌性能研究
Research on Progressive Collapse Performance of Steel Roof Truss System
摘要
Abstract
Steel roof truss system is widely applied in the plants, workshops and large-scale public buildings, once the collapse happened, it will cause heavy casualties and huge economic losses, so it is significant to propose and establish the corresponding collapse design methods and countermeasures. In this paper, a factory steel roof truss system as an example, the finite element analysis software SAP2000 is used to simulate the progressive collapse of the plane and space steel roof system, the internal force redistribution and dynamic response of residual structures under sudden loading after initial failure of the key components critical element is studied. The results showed that for the plane steel roof truss, the initial failure of cross-end diagonal web member damage seriously weakened the shear-bearing capacity and regional rigidity of roof truss end-to-side, this will lead to the weakness of this region, and then cause the collapse chain reaction. For the spatial steel roof truss system, the damage of the key components of the roof enabled the residual structure between adjacent roof trusses to establish the main internal redistribution path through the purlin nearest to the initial failure position and with the strongest rigidity. In addition, the suspension of the purlin to some extent controlled the final collapse and deformation.关键词
钢屋架体系/连续倒塌/数值模拟/关键构件/内力重分布Key words
Progressive collapse/steel roof truss system/nonlinear analysis/key member/internal force redistribution分类
建筑与水利引用本文复制引用
李奉阁,李爱伟,贾宏玉..钢屋架体系连续倒塌性能研究[J].山东农业大学学报（自然科学版）,2017,48(6):837-843,7.基金项目
内蒙古自然科学基金(2015MS0552) （2015MS0552）
