| 大跨度斜拉桥拉索安全评估的概率方法 |
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| 引用本文： | 朱劲松,肖汝诚,何立志.大跨度斜拉桥拉索安全评估的概率方法[J].东南大学学报,2007,23(1):92-97. |
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| 作者姓名： | 朱劲松 肖汝诚 何立志 |
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| 作者单位： | 天津大学建筑工程学院 天津300072(朱劲松)，同济大学桥梁工程系 上海200092(肖汝诚)，北京工业大学工程抗震与结构诊治北京市重点实验室 北京100022(何立志) |
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| 基金项目： | The Opening Fund of the Key Laboratory of UrbanSecurity and Disaster Engineering of Ministry of Education (NoEESR200701)，the Opening Fund of Beijing Laboratory of EarthquakeEngineering and Structural Retrofit |
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| 摘 要： | 为了对运营期斜拉桥安全性进行评估,提出了评估斜拉索安全性的方法.考虑Daniels效应和断丝概率提出斜拉索强度模型与基于斜拉索运营期安全系数的大跨度斜拉桥可靠度评估方法.作为模型的应用验证,分析了宁波招宝山斜拉桥最长边索,即第25号索在不同检测期的安全性,并调查了不同的参数对安全概率的影响.分析结果表明:斜拉索Daniels效应不可忽略;运营期斜拉索的退化可以通过线性增长的索内断丝率来模拟;考虑斜拉桥拉索退化过程的随机性评估运营期斜拉桥拉索安全水平的方法是有效的.
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| 关 键 词： | 安全系数 概率 评估 斜拉桥 |
| 文章编号： | 24268025 |
| 修稿时间： | 08 7 2006 12:00AM |
Probability evaluation method for cable safety of long-span cable-stayed bridges |
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| Zhu Jinsong,Xiao Rucheng,He Lizhi.Probability evaluation method for cable safety of long-span cable-stayed bridges[J].Journal of Southeast University(English Edition),2007,23(1):92-97. |
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| Authors: | Zhu Jinsong Xiao Rucheng He Lizhi |
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| Institution: | 1 School of Civil Engineering, Tianjin University, Tianjin 300072, China;2Department of Bridge Engineering, Tongji University, Shanghai 200092, China;3The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing 100022, China |
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| Abstract: | A method of cable safety analysis is proposed for safety evaluation of long-span cable-stayed bridges.The Daniels' effect and the probability of broken wires in the cable are introduced to develop the cable strength model and the reliability assessment technique for long-span cable-stayed bridges based on the safety factors analysis of stay cables in service.As an application of the proposed model,the cable safety reliability of the cable No.25 of Zhaobaoshan cable-stayed bridge in China is calculated.The effects of various parameters on the estimated cable safety reliability are investigated.The results indicate that the proposed method can be used to assess the safety level of stay cables in cable-stayed bridges effectively. The Daniels' effect should be taken into account for assessment,and the probability of broken wires can be used to simulate the deterioration of stay cables in service. |
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| Keywords: | safety factor probability evaluation cable-stayed bridge |
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