摘要
北京新机场航站楼屋顶及其支承屋顶的结构均为钢结构,屋顶钢结构分为6个区域,包括中央大厅主楼及5条指廊。中央大厅主楼设置6组C形柱,形成直径180m的中央大厅空间,在跨度较大的北中央大厅加设2组C形柱减小结构跨度,C形柱采用格构柱的结构形式;指廊区由钢柱和外幕墙柱形成稳定结构体系。采用有限元分析方法,研究了航站楼C形柱的抗连续倒塌性能、航站楼整体结构的抗连续倒塌性能、C形柱失效影响范围以及指廊结构的抗连续倒塌性能。结果表明,C形柱抗连续倒塌性能良好,局部柱失效后其他柱柱底反力变化值可以为下部混凝土支承结构提供极限承载力设计依据;整体结构抗连续倒塌性能及失效影响范围分析可以为C形柱的性能目标提供制定依据;在1根主支承柱失效时,指廊钢结构不会发生连续倒塌。
The roof and supporting system of terminal building of Beijing New Airport adopt steel structure. The roof steel structure of the terminal building is divided into 6 areas,including the central hall and 5 corridors. Part roof of the central hall is supported by 6 groups of C-shaped columns,which form an central area of 180 m in diameter,2 groups of C-shaped columns are added to the north of the central hall in order to reduce the span of the structure. C-shaped columns adopt latticed column style. The corridor is supported by steel tubular columns and curtain wall supporting columns,which form a stable structure system. The finite element method was adopted,resist progressive collapse behavior of C-shaped columns,resist progressive collapse behavior of the whole structure,influence range on C-shaped column failure,and resist progressive collapse behavior of the corridor were studied. The results indicate that,the resistance to progressive collapse is adequate when latticed column style is adopted by C-shaped columns,after partial column failure,the variable reactions of other columns would contribute to ultimate bearing capacity of lower concrete structure as a design basis. Performance of progressive collapse behavior of whole structure and influence range analysis would contribute to performance of C-shaped column as a design basis. When one primary brace is failed,no progressive collapse behavior is observed on the corridors.
作者
朱忠义
王哲
束伟农
秦凯
周忠发
张琳
Zhu Zhongyi Wang Zhe Shu Weinong Qin Kai Zhou Zhongfa Zhang Lin(Beijing Institute of Architectural Design, Beijing 100045, China)
出处
《建筑结构》
CSCD
北大核心
2017年第18期10-14,共5页
Building Structure
关键词
北京新机场
抗连续倒塌
大跨钢结构
拆除构件法
非线性动力分析
生死单元
Beijing New Airport
progressive collapse
large span steel structure
alternate path method
nonlinear dynamic analysis
birth death element
