本文采用有限单元法计算钢梁中不同残余应力模型、荷载形式、截面尺寸、材料性质等因素对简支工形钢梁的整体失稳临界曲线的影响。认为我国钢结构设计规范应针对轧制型钢梁和焊接板梁的残余应力模不同而采用两条不同的失稳临界曲线,不同荷载形式也会影响到失稳临界曲线的形态,可考虑用简单的系数加以修正。 In this paper, the finite element method is used to calculate the influence of various residual stress models, load forms, cross-sectional dimensions, and material properties on the total instability critical curve of simply-supported form steel beams. It is considered that the steel structure design specification in China should adopt two different instability critical curves for different residual stress modes of rolled steel beams and welded plate girders. Different load types also affect the shape of the critical curve of instability, which can be considered. Simple coefficients are corrected.