建筑结构学报2012，Vol.33Issue(4)：31-39,9.
大跨度索穹顶结构抗火性能分析
Fire resistance analysis of large-span cable dome structure
摘要
Abstract
To satisfy the need for the design of the National Fitness Center in Ejin Horo Banner,Inner Mongolia,the fire resistance performance of the cable dome structural system is studied in the paper.Considering material nonlinearity under high temperature,the structural response under different fire conditions and the basic laws of structural deformation,node displacement and prestressing force loss were analyzed,based on thermal-structural coupling method and the model of atmosphere temperature ascending in large space.This research indicates that the lateral stiffness of Geiger cable dome structure is weak and it is susceptible to eccentric fire load;the eccessive deflection and lateral deformation are major reasons for structural failure and nonstructural components＇ early damage under fire.The pestressing force loss of the ridge cables,especially the inner ridge cables,is more serious,and the struts should be considered as key parts in the fire resistance design.Finally,for the deficiency of plane stiffness in Geiger cable dome structure,the improvement of adding loop rigid rods on the upper node of struts can benefit the fire resistance performance significantly.关键词
大跨度索穹顶结构/抗火分析/温度-结构耦合/结构响应/预应力损失Key words
large-span cable dome/fire resistance/thermal-structure coupling/structural response/prestressing force loss分类
建筑与水利引用本文复制引用
刘学春,张爱林,谢伟伟,葛家琪,张国军..大跨度索穹顶结构抗火性能分析[J].建筑结构学报,2012,33(4):31-39,9.基金项目
国家自然科学基金重点项目 （）
北京工业大学城市与工程安全减灾教育部重点实验室项目 （）
