结合现有关于冷弯型钢残余应力的研究成果,用有限元软件模拟分析了在初始缺陷影响下,冷弯厚壁双槽钢柱焊接组合截面构件,在冷弯残余应力单独作用以及焊接残余应力和冷弯残余应力共同作用下的整体稳定性。分析发现:在焊接残余应力和冷弯残余应力共同作用下,厚壁轴心受压构件的整体稳定性能普遍比现有规范的结果低,最大误差达15%。因此在确定该构件稳定承载力时,应考虑焊接残余应力和冷弯残余应力的共同作用。 Combined with the existing research results on the residual stress of cold-formed steel, the finite element software was used to simulate and analyze the effect of initial defects on the cold-formed thick-walled double-channel steel column welded composite section members. And cold bending residual stress under the overall stability. The analysis shows that under the joint action of welding residual stress and cold residual stress, the overall stability of thick-walled axial compression members is generally lower than the existing specifications, with the maximum error of 15%. Therefore, when determining the stable bearing capacity of the component, the joint action of welding residual stress and cold bending residual stress should be considered.