| 车道荷载作用下公路多主梁桥剪力计算方法 |
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| 引用本文： | 丁南宏,郭健,林丽霞.车道荷载作用下公路多主梁桥剪力计算方法[J].兰州铁道学院学报,2006,25(6):57-60. |
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| 作者姓名： | 丁南宏 郭健 林丽霞 |
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| 作者单位： | 兰州交通大学土木工程学院，兰州交通大学土木工程学院，兰州交通大学土木工程学院 甘肃兰州730070，西南交通大学土木工程学院，四川成都610031，甘肃兰州730070，甘肃兰州730070 |
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| 基金项目： | 兰州交通大学校科研和教改项目 |
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| 摘 要： | 考虑荷载横向分布系数m沿桥跨方向的变化,采用积分法对车道均布荷载引起的支点最大剪力进行了计算.其次根据函数极值原理推导了车道集中荷载引起的支点最大剪力计算公式及相应最不利荷载布置;提出了采用支点最大剪力计算判别式进行简便、准确计算支点最大剪力的方法.最后结合我国2004年公路桥规,以公路桥涵标准设计为算例,对本文计算方法和传统经验方法的结果进行了误差分析,说明本文提出的方法对桥涵设计及结构分析具有一定的指导意义.
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| 关 键 词： | 多主梁桥 剪力计算 荷载横向分布系数 车道荷载 |
| 文章编号： | 1001-4373(2006)06-0057-04 |
| 收稿时间： | 2006-06-30 |
| 修稿时间： | 2006年6月30日 |
A Shear Force Calculation Method for Multi-girder Highway Bridge under Lane Loads |
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| Ding Nanhong,Guo Jian,Lin Lixia.A Shear Force Calculation Method for Multi-girder Highway Bridge under Lane Loads[J].Journal of Lanzhou Railway University,2006,25(6):57-60. |
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| Authors: | Ding Nanhong Guo Jian Lin Lixia |
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| Institution: | 1. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070,China; 2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | Considering the change of the load transverse distribution coefficient along the bridge span,the maximum value of shear force at supporting point caused by uniformly distributed lane load is calculated by integral method.Then,the formula of the maximum value of shear force at supporting point caused by concentrated lane load is derived,and the most disadvantageous loads arrangement is confirmed correspondingly,thus the simple,convenient and accurate method to calculate the shear force at supporting point using discriminant which can be applied to chose the appropriate formula is put forward.Lastly,combining the standard specifications for highway bridges of China carried out in 2004,the error between the results calculated by the method brought forward in this paper and traditional method is analyzed taking the standard design of highway bridges as examples.The method brought forward in the paper has a certain guiding significance in bridge design and structure analysis. |
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| Keywords: | multi-girder bridge shear force calculation load transverse distribution coefficient lane load |
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