摘要
提出了利用梁单元进行钢筋混凝土框架结构火灾分析的方法.以ABAQUS为基础,通过编制高温下混凝土材料子程序和用户自定义场变量子程序,确定了钢筋混凝土梁柱截面混凝土和钢筋的温度,并进一步确定了高温下混凝土的增量应力应变关系.计算结果与ABQUS混凝土模型的对比表明本文方法合理.
A method analyzing reinforced concrete frames in fire by using beam element is presented in this paper. The temperature of the concrete and steel rebars of a reinforced concrete element cross-section is exactly decided by coding a user material subroutine and a user predefined field subroutine, and then the incremental strain-stress relation of concrete at elevated temperatures is determined. The comparison between the calculated results and ABAQUS concrete model results shows that the presented method is reasonable.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2010年第3期316-320,共5页
Journal of Beijing University of Technology
基金
北京市自然科学基金资助项目(8082004)
关键词
钢筋混凝土框架
用户材料子程序
增量应力应变关系
火灾
reinforced concrete frames
user material subroutine
incremental strain-stress relation
fire
