(1 武汉大学土木建筑工程学院，武汉430072； 2 邵阳学院，邵阳422000)

［摘要］澳洲/新西兰规范采用直接强度法计算冷弯薄壁轴心受压构件畸变屈曲。我国《低层冷弯薄壁型钢房屋建筑技术规程》（送审稿）(简称中国规范)已经通过了专家审查，该规程针对冷弯薄壁轴心受压构件，参考澳洲/新西兰规范，提出了基于有效面积法的畸变屈曲计算公式。对轴压柱畸变屈曲的直接强度法和有效面积法计算进行对比分析，阐明了有效面积法的进步意义，并对中国规范提出了有关的建议。给出了用两种方法计算的算例分析，可供设计研究参考。

［关键词］冷弯薄壁型钢；轴压柱；畸变屈曲；直接强度法；有效面积法

中图分类号：TU392.1文献标识码：A文章编号：1002-848X(2011)02-0056-03

Comparisons of DSM and EAM of distortional buckling of cold-formed thin-wall columns under axial pressure

Luo Hongguang^1,2, Guo Yaojie¹, Liu Huachen¹

(1 School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China;

2 Shaoyang University, Shaoyang 422000, China)

Abstract:The Direct Strength Method (DSM) for cold-formed thin-wall steel members is available in the Australian/New Zealand standard. Chinese professional standard Technical specification for low-rise cold-formed thin-wall steel buildings (hereinafter referred to as Chinese standard) has passed the experts examination. Based on the Effective Area Method (EAM), the calculation formulas fitting for the distortional buckling of cold-formed thin-wall steel columns under axial pressure were raised by the Chinese standard which used the Australian/New Zealand standard as the reference. The calculation formulas of DSM and EAM were compared. A brief evaluation of positive meaning about the EAM was made. Some suggestions for the Chinese standard were presented. The calculating processes of DSM and EAM were displayed by an example which can give reference to the research and design.

Keywords:cold-formed thin-wall steel; column under axial pressure; distortional buckling; DSM; EAM

作者简介：罗洪光，博士研究生，Email:whuluohongguang@163.com。

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