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薄壁钢结构构件局部与整体稳定相关作用问题是一个相当复杂的研究课题,精确地分析必然要涉及到材料和几何非线性,给问题的解决增加了很大的难度。本文提出了一种有效的分析方法,把局部屈曲的薄壁压弯构件等效成若干个局部屈曲的小波段所组成的梁柱模型,通过建立短柱段超屈曲后的M-P-Φ曲线,用有限积分法获得压弯构件的相关屈曲承载能力。进行了冷弯槽钢截面柱的受压试验,试验与理论分析结果符合良好。
The problems related to the local and overall stability of thin-walled steel structural components are a very complex research topic. Accurate analysis necessarily involves materials and geometric nonlinearities, which adds great difficulty to the solution of the problem. In this paper, an effective analytical method is proposed, in which the locally buckling thin-walled compressively and flexural members are equivalent to several beam-column models composed of locally buckling small bands, and the post-buckling MP-Φ curve is established by the short-pillar-section. The related buckling load carrying capacity of the bent and bent members was obtained by the finite integral method. The compression test of cold-formed channel section columns was carried out. The test and theoretical analysis results are in good agreement.