中国《钢结构设计规范》对单角钢截面构件的设计规定相对简化甚至空白。为了解决这个问题，通过对比分析美国钢结构规范ANSI/AISC360—2010、英国钢结构规范BS5950—1：2000和欧洲钢结构规范Eurocode 3对单角钢构件受压(包括轴心受压和单面连接单角钢受压)、受弯的设计规定发现：美国规范中当分肢的宽厚比b/t≤20时只考虑弯曲屈曲的规定不甚合理；英国规范对单角钢梁的规定偏于保守。最后，提出3条建议：深入开展单角钢用作受弯构件时的承载力研究；将单角钢分肢、工字钢与槽钢截面的自由外伸翼缘三者作为“非加劲板”对待时宜考虑板件间约束的强弱；将局部稳定和整体稳定两方面验算统一为考虑了局部屈曲影响的构件整体承载力验算。%The provisions about the stability capacity of members with single angle section are simple or have not been provided in Chinese Code for Design of Steel Structures ( GB50017—2003 ) . In order to solve this problem, in this paper, the principles of angles subject to compression and bending were introduced according to foreign codes such as ANSI/AISC360—2010 , BS5950—1:2010 , Eurocode 3 , etc. It is somewhat questionable when single angle with b/t≤20 does not require the computation of flexural-torsional buckling in AISC code and may be conservative to single angle flexural member when using BS5950 . The authors proposed three main questions which were answered in the future codification:1) research of flexural capacity of single angle should be carried out;2) a unified concept, unstiffened element should be applied to these sections such as angle leg, I or C-shapes, and the web-flange interaction should be considered; 3 ) the member capacity considering local buckling should be adopted instead of overall stability and local stability.
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