| 等截面薄壁箱梁剪力滞效应的能量变分法解 |
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| 引用本文： | 邹永红,杨华,赵华,达帆.等截面薄壁箱梁剪力滞效应的能量变分法解[J].公路,2007(3):65-68. |
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| 作者姓名： | 邹永红 杨华 赵华 达帆 |
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| 作者单位： | 1. 中国市政工程西南设计研究院,成都市,610081
2. 成都市公路规划勘察设计院,成都市,610035 |
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| 摘 要： | 在用能量变分法求解薄壁箱梁的剪力滞问题时,不同于以往假设箱梁的上顶板、悬臂板和下底板具有相同的纵向位移转角差函数,采用了三个不同的纵向位移转角差函数来反映薄壁箱梁不同宽度翼板的剪滞变化幅度,通过变分原理建立了薄壁箱梁弯曲变形的控制微分方程,并获得相应的解析解。结果与采用相同位移差函数的解析解和ANSYS有限元计算进行比较分析,验证了本文方法更合理。
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| 关 键 词： | 薄壁箱形梁 剪力滞效应 能量变分原理 |
| 文章编号： | 0451-0712（2007）03-0065-04 |
| 修稿时间： | 2006-11-28 |
Energy-Variational Method of Shera Lag Effect in Constant Section Thin-Walled Box Girder |
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| ZOU Yong-hong,YANG Hua,ZHAO Hua,DA Fan.Energy-Variational Method of Shera Lag Effect in Constant Section Thin-Walled Box Girder[J].Highway,2007(3):65-68. |
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| Authors: | ZOU Yong-hong YANG Hua ZHAO Hua DA Fan |
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| Institution: | 1. China Municipal Works Southest Design and Research Institute, Chengdu 610081, China; 2. Highway Planning, Servey and Design Institute of Chengdu City, Chengdu 610035, China |
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| Abstract: | In this paper,the shear lag effect in the thin-walled box girder are analyzed with energy-variational principle,considering three longitudinal displacement functions for constant section box girder with varying depth other than the same longitudinal displacement functions at the top,cantilever flanges and foot.On the basis of the energy-variational principle,the governing differential equations are derived and the closed-form solutions of the equations are obtained.The results show that the new method is more effective compared with that obtained from the same longitudinal displacement functions method and ANSYS. |
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| Keywords: | thin-walled box girder shear lag effect energy-variational principle |
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