摘要
为验证火灾下大跨空间结构采用的传统升温模型——标准升温曲线是否合理,经理论分析该升温模型与大空间空气升温模型对结构的性能和耐火极限的结论有着很大的不同。以2008奥运羽毛球场馆实际工程为背景,采用两种模型模拟火灾,对火灾下的结构进行性能分析。标准升温曲线得出在22 min左右结构坍塌。大空间空气升温模型则得出结构在90 min时仍没有坍塌,但个别构件内力、位移变化幅度较大。研究表明:大空间升温模型可以更贴切地体现大空间结构火灾下的实际响应。
To verify if it is appropriate for the long-span space structure when using the traditional heating-up model and standard heating-up curve,and the different conclutions to the behavior of the structure and the fire-resistant highpoint can be got from the this model and the air heating-up model in large space by theoretical analysis.This paper,which is based on the project of badminton gymnasium for 2008 Olympic Games,simulates the fire in accurate and analyzed the behavior of the structure with the two models.It is collapsed at about 22 min when using the standard heating-up model,and it is also materialized by the mechanism of each member.It is not collapsed even at 90 min when using the air heating-up model in large space,but the amplitude of force and displacement for some particular component varies a lot.The analysis indicates that the air heating-up model in large space can embody the actual response of large-space structures in fire.
出处
《工业建筑》
CSCD
北大核心
2009年第S1期485-490,共6页
Industrial Construction
基金
国家自然科学基金资助项目(50678012)
北京市拔尖创新人才资助项目(05004311200601)
关键词
大跨空间结构
大空间空气升温模型
标准升温曲线
耐火极限
long-span space structure
air heating-up model in large space
standard heating-up curve
fire-resistant high-point
