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| 引用本文： | 郑昌坝,张洪海,林志祥.???????????????????????о?[J].力学与实践,2007,29(6):56-59. |
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| 作者姓名： | 郑昌坝 张洪海 林志祥 |
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| 作者单位： | 云南农业大学水利水电与建筑学院 650201 云南农业大学水利水电与建筑学院 650201 云南农业大学水利水电与建筑学院 650201 |
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| 摘 要： | 一定长度的薄壁构件在纵向或横向荷载作用下，未达到材料极限破坏前就有
可能发生弹性弯扭屈曲失稳的问题. 分析了工字型截面悬臂钢梁的此类问题，应用平衡
法和能量法导出构件在轴向和横向荷载作用下的弹性弯扭屈曲微分方程，利用里兹法求其临
界载荷，并确定截面固定时的极限特征长度.
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| 关 键 词： | 薄壁构件 工字型截面 弯扭屈曲 极限特征长度 |
| 收稿时间： | 2006-09-25 |
| 修稿时间： | 2007-10-15 |
ON STABILITY OF I-SECTION STEEL BEAM CANTILEVERS |
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| ZHENG Changba,ZHANG Honghai,LIN Zhixiang.ON STABILITY OF I-SECTION STEEL BEAM CANTILEVERS[J].Mechanics and Engineering,2007,29(6):56-59. |
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| Authors: | ZHENG Changba ZHANG Honghai LIN Zhixiang |
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| Abstract: | A given length thin-wall member,under axial or lateral loads below its material limit strength, may under go elastic flexural and torsional buckling.An analysis is carried out for the I-section cantilever steel beam in this paper.Equilibrium method and energy method are used to obtain the differential equation of the elastic flexural and torsional buckling under the axial pressures and transverse loads,and Ritz method is used to solve the derived differential equation and obtain critical values and the limit characteristics of the fixed beam section. |
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| Keywords: | thin-walled member I-section flexural and torsional buckling limited characteristic length |
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