| 下承式脊骨梁横向剪力滞效应 |
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| 引用本文： | 徐艳秋,刘静文.下承式脊骨梁横向剪力滞效应[J].北方交通大学学报,2011(4):62-65. |
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| 作者姓名： | 徐艳秋 刘静文 |
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| 作者单位： | [1]北京交通大学土木建筑工程学院,北京100044 [2]北京东直门机场快速轨道交通有限公司,北京100011 |
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| 基金项目： | 中央高校基本科研业务费专项资金资助项目（2011JBM087） |
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| 摘 要： | 下承式脊骨梁作为一种新型的城市轨道交通高架桥，具有小脊梁、大悬臂的特点．作为主梁的一部分，悬臂翼缘板也产生纵向弯曲，其横向剪力滞效应非常显著．本文采用ANSYS软件建立下承式脊骨梁的有限单元模型，计算了集中荷载及均布荷载作用下各横截面底板弯曲正应力，并与按初等梁理论的计算结果对比，得出横向剪力滞系数沿底板的分布规律．
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| 关 键 词： | 脊骨梁 剪力滞效应 有限元 轨道交通 |
Transverse shear lag effect of the through spine beam |
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| Institution: | XU Yanqiu , LIU Jingwven (1. School of Civil Engineering, Beijing J iaotong University, Beijing 100044, China; 2. Beijing Dongzhimen Airport Express Rail Company Ltd. , Beijing 100011, China) |
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| Abstract: | The through spine beam is a new bridge type for urban rail transit, which has the structural properties of the small box girder and large cantilever. As the part of spine beam, cantilever plates is prone to longitudinal warping of beam, and the transversal shear lag effect is very obvious. FEA soft- ware ANSYS was introduced to construct the calculating model of through spine beam for urban rail transit. The bending normal stress in bottom plate under concentrated load and uniform distributing load were calculated and compared to the result of the Timoshenko beam theory. The distribution pat- tern of transverse shear lag coefficient is coneluded. |
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| Keywords: | spine beam shear lag effect finite element rail transit |
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