| 高次位移函数时箱梁剪滞效应变分法解 |
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| 引用本文： | 陈常松,邓安.高次位移函数时箱梁剪滞效应变分法解[J].重庆交通大学学报(自然科学版),2009,28(1):5-7,44. |
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| 作者姓名： | 陈常松 邓安 |
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| 作者单位： | 长沙理工大学桥梁与结构工程学院,湖南,长沙,410076 |
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| 摘 要： | 考虑了剪滞纵向位移差函数分别取5次和6次抛物线以反映薄壁箱梁的剪滞效应变化幅度,并应用能量变分法,得出了相应的剪力滞效应微分方程的计算公式和边界条件。并对按不同抛物线变化规律的位移函数的剪力滞效应在几种常见的荷载及支承形式下作了对比。结果显示箱梁纵向位移函数取高次时比以往常采用的三次抛物线的剪力滞效应更加精确,以上结论对以后深入研究剪力滞效应有一定的借鉴指导作用。
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| 关 键 词： | 箱形梁 能量变分法 剪力滞 高次抛物线 |
Variational Solution of Shear Lag Effect of Box Girder in High Order Displacement Function |
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| CHEN Chang-song,DENG An.Variational Solution of Shear Lag Effect of Box Girder in High Order Displacement Function[J].Journal of Chongqing Jiaotong University,2009,28(1):5-7,44. |
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| Authors: | CHEN Chang-song DENG An |
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| Institution: | School of Bridge & Structure Engineering;Changsha University of Science & Technology;Hunan Changsha 410076;China |
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| Abstract: | Considering the shear lag longitudinal displacement,five times and six times parabola are adopted respectively to reflect the changing range of shear lag effect of thin wall box girders.And the calculation formula and boundary conditions of corresponding differential functions of shear lag effect are obtained by the adoption of energy variation method.According to the changing rules of different parabolic function of the displacement of shear lag effect in several common loading and bearing forms,a comparis... |
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| Keywords: | box girder energy variation method shear lag effect high order parabola |
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