| 增设广义位移下箱梁剪力滞效应的变分法 |
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| 引用本文： | 耿少波,石雪飞,阮欣,王晓明.增设广义位移下箱梁剪力滞效应的变分法[J].同济大学学报(自然科学版),2010,38(9):1276-1280. |
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| 作者姓名： | 耿少波 石雪飞 阮欣 王晓明 |
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| 作者单位： | 同济大学,桥梁工程系,上海,200092 |
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| 基金项目： | 国家"八六三"高技术研究发展计划资助项目，山东省交通科技资助项目 |
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| 摘 要： | 考虑荷载横向移动时顶板、底板剪力滞效应的不同,及腹板剪力在剪切变形中做功效应的影响,根据以往学者得出的试验效果良好的三次抛物线型,分设不同的纵向位移函数,取4个独立的广义位移对箱梁的剪力滞效应进行分析.由最小势能原理,建立关于不同位移的微分方程及自然边界条件.公式演引过程表明,剪力滞效应与腹板剪切效应独立存在;求解结果表明,所演引的公式更符合实际结构应力及位移分布情况,具有较高的实用价值.
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| 关 键 词： | 箱梁 变分法 剪切变形 剪力滞效应 广义位移 |
| 收稿时间： | 2009/3/23 0:00:00 |
| 修稿时间： | 5/12/2010 7:39:07 PM |
Variational Method of Shear Lag Effect of Box Beams with Adding Generalized Displacement Assumptions |
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| GENG Shaobo,SHI Xuefei,RUAN Xin and WANG Xiaoming.Variational Method of Shear Lag Effect of Box Beams with Adding Generalized Displacement Assumptions[J].Journal of Tongji University(Natural Science),2010,38(9):1276-1280. |
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| Authors: | GENG Shaobo SHI Xuefei RUAN Xin and WANG Xiaoming |
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| Institution: | Department of Bridge Engineering, Tongji University, Shanghai 200092, China;Department of Bridge Engineering, Tongji University, Shanghai 200092, China;Department of Bridge Engineering, Tongji University, Shanghai 200092, China;Department of Bridge Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | The top plate and bottom plate of box beams behave different shear lag effects when the symmetric load moves along the cross section.The web shear's work on the shearing deformation is taken.Based on the previous research and conclusion on the shear lag effect experiment,cubic parabola displacement function is adopted.Considering the top and bottom plate's different longitudinal displacements,four independent generalized displacements are taken to analysis the shear lag of box beams.Based on the principle o... |
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| Keywords: | box beams variational method shear deformation shear lag effect generalized displacements |
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