| 不同荷载形式对箱梁剪力滞的影响 |
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| 引用本文： | 夏文强. 不同荷载形式对箱梁剪力滞的影响[J]. 南阳理工学院学报, 2013, 0(6): 89-91,100 |
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| 作者姓名： | 夏文强 |
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| 作者单位： | 兰州交通大学土木工程学院,甘肃兰州730070 |
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| 摘 要： | 剪切变形使得箱梁的翼板中出现应力不均匀现象。本文以最小势能原理为基础,建立薄壁箱梁翘曲剪力滞的控制微分方程,推导并讨论了集中荷载、均布荷载对简支单箱单室箱梁剪力滞的影响。总结出考虑剪力滞效应后弯曲法向应力的变化规律,对集中、均布荷载作用下的影响进行分析并得出了一些结论。
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| 关 键 词： | 最小势能原理 变分法 荷载形式 剪力滞 弯曲法向应力 |
INFLUENCES OF DIFFERENT LOADS OVER SHEAR LAG OF BOX GIRDER |
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| XIA Wen-qiang. INFLUENCES OF DIFFERENT LOADS OVER SHEAR LAG OF BOX GIRDER[J]. Journal of Nanyang Institute of Technology, 2013, 0(6): 89-91,100 |
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| Authors: | XIA Wen-qiang |
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| Affiliation: | XIA Wen-qiang (Civil Engineering School, Lanzhou Jiaotong University, Lanzhou 730070, China) |
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| Abstract: | The uneven stress is caused by the influence of shearing deformation in the wing plate of the box girder. In this article, shear lag differential equation of thin-walled box girder is established based on the principle of minimum potential energy. In addition, the effect on shear lag of single cell single box girder is deduced and discussed under concentrated load and uniformly distributed load. The change rule of bending normal stress is concluded in the case of shear lag effect. And some conclusions on the effect on shear lag of box girder is drew under concentrated, uniform load. |
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| Keywords: | minimum potential energy principal calculus of variation load form shear lag bending normal stress |
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