This paper reports the results of a numerical investigation on the influence of local buckling on the ultimate strength and design of locally fixed-end and globally pined-end stainless steel lipped channel columns in compression. The elastic buckling load is a key parameter in predicting the design strength of stainless steel lipped channel columns. Elastic buckling loads under simple–simple, clamped–clamped and experimental boundary conditions have been compared. To extend the data, a finite element model of stainless steel lipped channel columns has been developed and verified against the test data. Parametric studies on the stainless steel lipped channel columns were performed. The test results are compared with the strength predictions from direct strength method (DSM), indicating that DSM included in North American specification is unsafe, but the DSM proposed by Becque et al. is conservative. A modified DSM equation was proposed and has been proven to accurately predict the ultimate capacities of the stainless steel lipped channel columns in compression.

本文报告了关于局部屈曲对极限强度影响的数值研究结果，以及受压局部固定端和整体固定端不锈钢唇形通道柱的设计。弹性屈曲载荷是预测不锈钢唇形槽柱设计强度的关键参数。比较了简单，简单，夹紧和实验边界条件下的弹性屈曲载荷。为了扩展数据，已经开发了不锈钢唇形通道柱的有限元模型，并根据测试数据进行了验证。对不锈钢唇形通道柱进行了参数研究。将测试结果与直接强度法（DSM）得出的强度预测值进行了比较，表明北美规范中包含的DSM是不安全的，但是Becque等人提出的DSM。是保守的。提出了一种改进的DSM方程，并已被证明可以准确预测不锈钢唇形通道柱在压缩状态下的极限容量。