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局部屈曲是薄壁矩形钢管的一种主要屈曲模式,分析时应考虑板组间的相关作用。开孔后,将导致应力重分布,进而改变构件的屈曲性能。应用ANSYS有限元软件对薄壁开孔矩形钢管构件轴压下的局部屈曲性能进行了分析研究,讨论了板件宽厚比、翼缘腹板宽度比、开孔率等参数对局部屈曲性能的影响。
Local buckling is a major buckling mode for thin-walled rectangular steel tubes, and the correlation between plates and plates should be considered in the analysis. After opening, it will lead to stress redistribution, which will change the buckling performance of the member. The finite element software ANSYS was used to analyze the local buckling behavior of the thin-walled rectangular steel tubular member under axial compression. The effects of the parameters such as the plate width to thickness ratio, the width ratio of the flange web, the opening ratio on the local buckling properties were discussed .