何保康 蒋 路
（西安建筑科技大学 710055）

[提要] 直接强度法(DSM)是一种不采用有效截面而取用全截面对冷弯薄壁型钢构件进行设计的全新方法。该法可计算冷弯薄壁型钢板件屈曲后的构件承载力，还可计算畸变屈曲构件的承载力。介绍了直接强度法的基本概念、发展现状、研究成果和设计方法等。用实例说明了直接强度法的计算过程，供设计研究参考。
[关键词] 冷弯型钢 局部屈曲 畸变屈曲 直接强度法

Abstract: Direct Strength Method (DSM)  is an entirely new method for the design of cold formed thin wall steel members by whole section instead of effective section.The method can be used for calculating the post-buckling strength and the distortional buckling strength of cold formed thin wall steel members.rlhe fundamental concepts,development status,research results and design method of DSM are introduced. The calculating process of this method is displayed by an example which can give reference to the research and design.
Keywords: cold formed steel; local buckling; distortional buckling; direct strength method