[提要] 按照空间失稳的概念，算出L，T形截面轴压柱的最小临界力与相应屈曲模态，并确定具有初弯曲、初扭转柱的二阶应力分布状态；再根据边缘屈服准则，反算出柱的极限荷载并绘制出柱子曲线。计算结果表明短柱有可能扭转失稳，需要作进4步的分析验算；细长柱只发生面内弯曲失稳，可以不进行修正。

[关键词]均匀受压柱 空间稳定 屈曲模态 柱子曲线

Abstract：Based on the concept of spatial stability, the minimum critical forces and buckling models corresponding to the axially-compressed columns with L-section and T-section are calculated; and for the columns with initial bending and torsion, the second stress distributions are determined. In addition, the limit loads of the columns are computed and the column curves are plotted in terms of outmost fiber yielded criteria. The results indicate that the stub columns probably lose stability due to torsion, and a further analysis on the stub columns need to be carried out, but slender columns become instable only by the bending in the plane and column curves needn't to be modified.

Keywords: axial uniformly compressed column; spatial stability; buckling mode; column curve