陈绍蕃
    （西安建筑科技大学 西安 710055）

[提要]  论述门式钢框架轻型化的技术措施，包括变化构件截面、减小腹板厚度、把中柱设计为摇摆柱、利用底板式简单柱脚的转动约束和屋面板的蒙皮效应等。给出了相应的计算方法和计算原则。
[关键词]  门式钢框架 楔形构件 柱脚约束 摇摆柱 屈曲后强度 蒙皮效应

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