高强度等边单角钢轴压构件稳定设计研究回顾与问题探讨

A review on buckling design research of high strength steel equal-leg angle members under axial compression

高强度单角钢轴压构件的稳定性能因其材料的屈服强度等力学性能改变而发生变化,因而在稳定设计及其相关研究中会遇到许多新的问题。针对这一现状,结合我国GB 50017-2003《钢结构设计规范》、美国钢结构设计规范ANSI/AISC 360-05和ASCE 10-97等三部规范,对设计规范中宽厚比限值规定的适用性、高强度角钢宽厚比限值制定的必要性、角钢构件长细比的计算,以及现有角钢轴压构件稳定计算的折减方法等问题进行了探讨和算例分析,基于稳定的基本理论和数据结果的对比分析,解释并给出了上述几个问题的确定性结论和需要注意的方面,为高强度单角钢轴压构件稳定设计方法的研究提供了参考。

The buckling behavior of high strength steel angle columns changes as a result of the mechanical property change,such as the steel strength,and some new problems need to be studied in this buckling design research.In this situation,based on the Chinese code GB 50017-2003,American code ANSI/AISC 360-05 and ASCE 10-97,several problems are discussed and analyzed in this study,including the applicability of width-thickness ratio reqirements in current design codes,its necessity for high strength steel angle columns,calculation of angle column slenderness,and buckling reduction method for high strength steel angle columns.On the basis of buckling theory and comparison of calculation results,some conclusions and issues that need attention are proposed,which can provide references for the research of buckling design of high strength steel angle columns.