| 湟水河大桥动力反应分析 |
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| 引用本文： | 李凡,刘世忠,赵河清.湟水河大桥动力反应分析[J].兰州铁道学院学报,2006,25(6):87-89. |
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| 作者姓名： | 李凡 刘世忠 赵河清 |
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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(李凡，刘世忠)，甘肃公路总段 甘肃兰州730070(赵河清) |
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| 基金项目： | 国家自然科学基金资助项目(503780436)，兰州交通大学“青蓝”人才工程基金资助项目 |
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| 摘 要： | 对湟水河大桥的现场检测表明此桥已成为一座“危桥”,但主拱肋结构仍具有一定的承载能力.根据检测结果提出了加固方案,推荐方案为将原双曲拱桥结构变为肋拱桥结构,增大了边拱肋的截面尺寸并增设横梁,加固后使该桥由原汽-13级荷载提高到了公路Ⅱ级荷载的通行标准.分别按反应谱理论和线性时程反应理论计算其在地震作用下的响应.由分析可知,采用此加固方案能使该桥满足设计抗震要求.
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| 关 键 词： | 拱桥 加固 谱分析 时程分析 |
| 文章编号： | 1001-4373(2006)06-0087-03 |
| 收稿时间： | 2006-07-20 |
| 修稿时间： | 2006年7月20日 |
Dynamic Response Analysis of Huangshui River Bridge |
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| Li Fan,Liu Shizhong,Zhao Heqing.Dynamic Response Analysis of Huangshui River Bridge[J].Journal of Lanzhou Railway University,2006,25(6):87-89. |
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| Authors: | Li Fan Liu Shizhong Zhao Heqing |
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| Institution: | 1. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; 2. Gansu Highway Office, Lanzhou 730070, China |
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| Abstract: | The field measurement of Huangshui river bridge indicates that it has been a dangerous bridge, but the arch ribs still have enough bearing capacity. The blueprint of reinforcement has been put forward according to the result of the field measurement. Our suggestion is changing the form of double-curvature into rib arch,meanwhile enhancing the section of side arch and adding some cross beams. After the reinforcement,the capacity of this bridge can enhance from standard highway load auto-13 to highway load II. Its response to seism has been analyzed by the response spectra method and the linear history method. From them,we can know that the bridge will be safety to seism after the reinforcement. |
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| Keywords: | arch-bridge reinforcement response spectrum analysis time history analysis |
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