中文摘要：

采用板壳单元离散变截面H型钢柱，并同时考虑构件整体与局部初始缺陷、残余应力、材料屈服、几何非线性等因素的影响。根据数值分析的结果，重点研究了腹板宽厚比、腹板楔率、翼缘宽厚比、长细比等参数对板件局部屈曲与构件整体稳定的影响，总结了压力作用下变截面H型钢柱局部屈曲、整体屈曲和相关屈曲的发展过程以及影响因素。

英文摘要：

The non - linear finite element method for plate - shell structure is proposed to trace up whole - process analysis of tapered H - section steel column, while the effects of many factors on member such as residual stress, initial geometric imperfections and so on are focused. According to load- deformation curves resulted from numerical analysis, interactive buckling of tapered H - section steel column is discussed. The behaviors on local buckling and overall buckling brought by width - thickness ratio of web, tapered ratio, width - thickness ratio of flange, and slenderness are emphatically researched.