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文章针对60°角钢局部稳定受力性能的问题,以薄壁构件稳定理论为基础,采用Rayleigh-Ritz法进行60°角钢轴心受压构件局部稳定的理论分析,得到60°角钢肢件的临界屈曲应力。根据“等稳定”准则推导出适合于60°角钢肢件宽厚比限值的表达式,与相应的设计方法和计算公式进行了对比分析。并且通过采用有限元分析软件ANSYS对60°角钢进行屈曲分析,验证了60°角钢宽厚比限值表达式的正确性。
In this paper, based on the stability theory of thin-walled members and the theoretical analysis of the local stability of 60 ° angle steel axial compression members by Rayleigh-Ritz method, the critical angle of 60 ° angle steel members is obtained. Buckling stress. According to “stable ” criterion, this paper derives an expression suitable for the limit value of aspect ratio of 60 ° angle steel, and compares with the corresponding design method and calculation formula. And by using the finite element analysis software ANSYS to analyze the buckling analysis of 60 ° angle steel, the correctness of the limit value expression of 60 ° angle steel is verified.