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依据波浪腹板H型钢梁受压翼缘的局部屈曲特性,同时参考平腹板钢梁受压翼缘局部屈曲的研究方式,运用瑞利-里兹法推导了波浪腹板翼缘局部稳定临界荷载表达式.提出了研究波浪腹板H型钢梁受压翼缘局部屈曲的理论计算模型,此模型将受压翼缘简化为两加载边简支,与波浪腹板相连的非加载边简支,而另一非加载边自由的单向均匀受压板.由ANSYS模拟分析得到了波浪腹板H型钢梁受压翼缘的屈曲模态.对比理论推导表达式计算结果与ANSYS有限元分析结果,发现两者吻合度高,验证了所提表达式的准确有效.同时探讨了翼缘和腹板参数尺寸的变化对翼缘局部稳定临界荷载的影响.
According to the local buckling characteristics of the compression flange of H-beam and the local buckling of the compression flange of the web, the Rayleigh-Leitz method is used to derive the local stability of the flange of the web The critical load expression is proposed.The theoretical calculation model for the local buckling of the compression flange of H-beam with corrugated webs is proposed, which simplifies the compression flange as simply supported with two loading edges and the non-loading edge And the other unidirectional unidirectional uniform compression plate with free load.The buckling mode of the compression flange of the H-beam with corrugated webs is obtained by the ANSYS simulation.Comparison of the calculated results with the ANSYS The results show that the agreement between them is high, which verifies the accuracy and validity of the proposed expression.Moreover, the influence of the variation of the parameters of flange and web on the local stability critical load of flange is also discussed.