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     李國強(qiáng)  陳  凱
    （同濟(jì)大學(xué)  上海 200092）

[提要]  利用針對變截面鋼剛架結(jié)構(gòu)抗火設(shè)計(jì)的有限元專用分析程序，通過研究各種參數(shù)變化對門式鋼剛架結(jié)構(gòu)的抗火臨界溫度的影響，推導(dǎo)出門式鋼剛架結(jié)構(gòu)實(shí)用抗火設(shè)計(jì)方法。通過算例介紹了方法的使用，并驗(yàn)證了方法的可靠性。
[關(guān)鍵詞]  門式鋼剛架結(jié)構(gòu)  抗火  設(shè)計(jì)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