基于几何缺陷影响下闭口薄壁型钢轴向受力构件屈曲分析的试验研究,开展了对闭口薄壁型钢存在不同几何缺陷情况下受轴向受力时的承载力变化情况的计算分析,探讨了闭口薄壁型钢在几何缺陷影响下承载力的变化情况.结果表明,几何缺陷对闭口薄壁型钢承载力的影响是不容忽视的,其中影响最大的比没有缺陷时可减小10％.综合各方面的情况分析可知,缺陷深度对试件的影响最显著,为以后进行相关研究提供了参考.%Based on the experimental study on compressive behaviors of the closed thin-walled steel with large geometrical imperfection, the effect of geometrical imperfection on load-displacement response of the closed thin-walled steel under compression was analyzed. A parametric study, including the imperfection length, depth and orientation was also conducted. The results showed that the effects of geometrical imperfection on closed thin-walled steel cannot be ignored, and for most of the specimens with geometrical imperfection, the column strength decrease by 10% than those intact specimens. The results also indicated that the depth of the geometrical imperfection is a critical parameter for a damaged column. The research result reported here could provide design rules for steel columns.
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