摘要
应用有限元程序对半刚接门式刚架在高温下的受力性能进行了整体结构非线性分析。计算结果表明:随着温度的升高,节点的刚度不断下降,当节点的刚度下降到不能约束与其连接的梁柱构件时,结构将发生突然坍塌性破坏;由于在高温下钢材的屈服强度下降较快,半刚性连接性能虽然能使梁柱节点处的受力性能改善,但不能提高整体结构的临界温度。
The paper has nonlinear finite-element whole structure analysis of semi-rigid gabled frame in high temperature by finite element software,draw the following conclusions：the connected rigidity decreases with temperature elevated,when the connected rigidity cann＇t restrain the beam and the column,the joint destroys suddenly;when the connection is semi-rigid,the semi-rigid can improve the machanical property,but the buckling strength of the steel decrease very fast at elevated temperature,the improvement of the connected machanical property can＇t increase the critical temperature about single-span gabled frame.
出处
《四川建筑科学研究》
北大核心
2011年第1期75-78,共4页
Sichuan Building Science
关键词
半刚接
门式刚架
有限元
刚度
临界温度
semi-rigid
gabled frame
rigidity
finite element
critical temperature
