| 大跨度斜拉桥主梁颤振动力可靠性分析 |
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| 引用本文： | 严定中,余建星,李彦苍,陈炳火. 大跨度斜拉桥主梁颤振动力可靠性分析[J]. 自然灾害学报, 2007, 16(3): 124-127 |
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| 作者姓名： | 严定中 余建星 李彦苍 陈炳火 |
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| 作者单位： | [1]天津大学建筑工程学院港口与海洋工程天津市重点实验室,天津300072 [2]厦门市海陆工程有限公司,福建厦门361012 |
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| 摘 要： | 针对大跨度斜拉桥主梁易发生颤振失稳的问题，基于现有的桥梁颤振分析及结构可靠性理论，将主梁颤振临界风速视为结构抗力变量，以主梁处随机风速为荷载变量建立了桥梁颤振动力可靠性分析的极限状态方程，并采用JC法对天津某桥主梁颤振可靠性进行了分析，得到了颤振失效概率，并得出了竖向刚度是影响颤振可靠度的一个关键指标的结论。
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| 关 键 词： | 结构可靠度 斜拉桥 主梁 颤振 |
| 文章编号： | 1004-4574（2007）03-0124-04 |
| 收稿时间： | 2006-12-30 |
| 修稿时间： | 2006-12-302007-02-10 |
Dynamic reliability analysis of flutter in girders of long-span cable-stayed bridge |
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| YAN Ding-zhong,YU Jian-xing,LI Yan-cang,CHEN Bing-huo. Dynamic reliability analysis of flutter in girders of long-span cable-stayed bridge[J]. Journal of Natural Disasters, 2007, 16(3): 124-127 |
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| Authors: | YAN Ding-zhong YU Jian-xing LI Yan-cang CHEN Bing-huo |
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| Affiliation: | 1, Key Lab of Harbor and Ocean Engineering of Tianjin City, College of Civil Engineering,Tianjin University, Tianjin 300072, China; 2, Xiamen Sea-land Englineering Co. Ltd, , Xianmen 361012, China |
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| Abstract: | In order to calculate the failure probability of the girders on a long-span and flexible cable-stayed bridge, a reliability model based on the limit state equation for analyzing the girders flutter is established. The limit state equation is a function of the critical wind speed and the expected wind speed at the girder site. Then the JC approach was employed and the result was obtained. Finally, through the analysis of the results, the vertical inflexibility of the girders is reported as a main influence factor to the structural reliability. |
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| Keywords: | structural reliability cable-stayed bridge girder flutter |
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