【作者】 邓长根； 周江；

【Author】 DENG Changgen ZHOU Jiang(Department of Building Engineering,Tongji University,Shanghai 200092,China)

【机构】 同济大学建筑工程系；

【摘要】 运用有限元法对H型截面钢构件进行了轴心或偏心压力作用下的弹性相关屈曲分析,指出当翼缘宽厚比与腹板高厚比之比值较大时,应考虑翼缘受力状态对相关屈曲性能的影响。引入刚度比及刚度比修正系数,按最小相对误差法得到了精度良好的可考虑翼缘约束作用的非均匀受压腹板屈曲系数拟合公式。在此基础上,按等强原则令腹板局部屈曲应力等于屈服应力得到可考虑翼缘约束作用的腹板高厚比限值。更多还原

【Abstract】 Elastic interactive buckling of H-section members under linearly distributed stress was investigated using finite element method.Results showed that the influence of the flange stress state should be considered in analysis if the flange is wide enough.A simple and accurate formula for the buckling coefficients of the web plate restrained by flanges was obtained by minimum relative-error fitting using the stiffness ratio and stiffness ratio correction factor as parameters.Furthermore,web height to thickness ratio limit that takes account of the flange restraint effect was presented through the web local buckling stress equals to the yield stress.更多还原