李国强  陈  凯
    （同济大学  上海 200092）

[提要]  利用针对变截面钢刚架结构抗火设计的有限元专用分析程序，通过研究各种参数变化对门式钢刚架结构的抗火临界温度的影响，推导出门式钢刚架结构实用抗火设计方法。通过算例介绍了方法的使用，并验证了方法的可靠性。
[关键词]  门式钢刚架结构  抗火  设计方法

Employing a non-linear finite element analysis program, which is designed especially for the calculation of the limit temperature of the steel portal frames with the tapered members against fire, authors carries out research on the influence of a number of parameters on the limit temperature of steel portal frames subjected to fires. A practical design method for steel portal frames against fire is developed. An example is presented to demonstrate the application of this method. The reliability of this method is also verified by this example.
Keywords:  steel portal frames; fire resistance; design method