摘要
在近年来国内外数起网格结构倒塌事故发生后,结构体系局部发生破坏后对整体结构的影响程度愈来愈受到结构工程师的关注。以广东科学中心空间网壳结构为实际工程背景,应用了网格结构损伤免疫力的概念,提出了网格结构进行损伤免疫力分析的两种方法。利用基于等效杆件撤销的结构重分析方法,编程实现了对网格结构损伤免疫力的定量评估。利用非线性静力分析方法对网壳结构在局部构件破坏后的抗倒塌性能进行了分析。分析结果表明,损伤免疫力大小反映了结构的内力调整能力和结构体系内部的薄弱环节,网壳结构整体损伤免疫力较好,不会出现局部杆件或节点破坏导致结构整体倒塌的情况。
Following some collapse accidents of grid structure at home and abroad in recent years,the engineers began to focus attention on the influence of local damage on the whole structure.The spatial latticed structure of Guangdong Science Center（GDSC） was selected as a practice background.The concept of damage immunity for spatial latticed structures was introduced.Two design methods are proposed to analyze the damage immunity of space grid structures according to the characteristics of the space grid structures.The structural re-analysis method based on the equivalent removal of members is adopted to evaluate damage immunity quantitatively.The nonlinear static analysis method is used to analyze structure anti-collapse property after local damage.The analysis of anti-collapse property for GDSC shows that the value of damage immunity reflects adjustment of internal forces capability and the weakness of structure system.The demage immunity of spatial latticed structure is better,and progressive collapse accident after local joint or member failure can be avoided.
出处
《建筑结构》
CSCD
北大核心
2010年第8期22-26,共5页
Building Structure
基金
广东省科技计划项目(2004B10101048)
(2006B37301009)
(2005A11601014)
建设部科技计划项目(2005-K1-48)
(2006-K3-01)
(2007-K3-09)
关键词
空间网壳结构
抗倒塌性能
损伤免疫力
杆件撤销
结构重分析
spatial latticed structure
anti-collapse property
damage immunity
removal of members
structural re-analysis
