摘要
该文利用梁单元建立了型钢混凝土平面框架耐火性能分析的有限元计算模型,有限元模型得到了构件试验结果的验证。利用建立的有限元模型,对局部火灾下型钢混凝土平面框架的破坏机理和破坏形态进行了分析。研究表明:火灾下型钢混凝土平面框架出现了三种典型的破坏形态,即内柱破坏导致的框架破坏、边柱破坏导致的框架破坏以及混合破坏形态;火灾分布位置及破坏时梁内轴力是影响框架破坏形式的关键因素。
A beam finite element （FE） model for the fire performance of steel reinforced concrete （SRC） plane frames is proposed in the paper, and the FE model is verified by SRC member test results. The failure mode and failure mechanism of the SRC plane frames are systematically studied by using the FE model. The results show that the SRC plane frames have three typical failure modes： failure induced by internal columns, failure induced by side columns, failure induced by combined failure of internal and side columns. The fire location and axial force of heated beams are the key factors that influence the failure mode of the SRC plane frames.
出处
《工程力学》
EI
CSCD
北大核心
2012年第12期156-162,169,共8页
Engineering Mechanics
基金
国家自然科学基金项目(51278477)
中国建筑科学研究院自筹资金资助项目(20120106330730073
20110106330730001)
关键词
破坏机理
型钢混凝土
框架
火灾
破坏方式
failure mechanism
steel reinforced concrete
frames
fire
failure mode
