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       陳紹蕃
    （西安建筑科技大學(xué) 西安 710055）

[提要]  論述門式鋼框架輕型化的技術(shù)措施，包括變化構(gòu)件截面、減小腹板厚度、把中柱設(shè)計(jì)為搖擺柱、利用底板式簡(jiǎn)單柱腳的轉(zhuǎn)動(dòng)約束和屋面板的蒙皮效應(yīng)等。給出了相應(yīng)的計(jì)算方法和計(jì)算原則。
[關(guān)鍵詞]  門式鋼框架 楔形構(gòu)件 柱腳約束 搖擺柱 屈曲后強(qiáng)度 蒙皮效應(yīng)

This article deals with technical measures for reducing the weight of steel portal frames such as making use of tapered members, reducing the thickness of web plates, employing leaning columns in multiple span frames, taking advantage of the restraint provided by simple column base and of the diaphragm effect of roof sheeting. Calculation methods or principles are presented accordingly.
Keywords: steel portal frame; tapered member; column base restraint; leaning column; post-buckling strength; diaphragm effect