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| 缆索承重桥梁的颤振可靠性 | |
| 引用本文： | 许福友,陈艾荣,张建仁.缆索承重桥梁的颤振可靠性[J].中国公路学报,2006,19(5):59-64. |
| 作者姓名： | 许福友 陈艾荣 张建仁 |
| 作者单位： | 1. 同济大学,桥梁工程系,上海,200092;大连理工大学,土木水利学院,辽宁,大连,116024 2. 同济大学,桥梁工程系,上海,200092 3. 长沙理工大学,桥梁与结构工程学院,湖南,长沙,410076 |
| 摘 要： | 基于公路桥梁抗风设计规范校准得到极值风速变异系数约为0.13;由苏通大桥桥址风速统计资料计算得到极值风速变异系数在0.13~0.14之间。提出了计算结构可靠指标的随机梯度算法,采用该算法从多种角度分析了变量分布类型及统计特征对苏通大桥颤振可靠指标计算结果的影响。计算结果表明:极值风速变异系数宜取为0.15;随机梯度算法思路简单,具有很好的稳定性,计算效率高。 |
| 关 键 词： | 桥梁工程 缆索承重桥梁 随机梯度算法 颤振可靠性 极值风速 |
| 文章编号： | 1001-7372（2006）05-0059-06 |
| 收稿时间： | 2005-12-09 |
| 修稿时间： | 2005年12月9日 |
Flutter Reliability of Cable Supported Bridge |
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| XU Fu-you,CHEN Ai-rong,ZHANG Jian-ren.Flutter Reliability of Cable Supported Bridge[J].China Journal of Highway and Transport,2006,19(5):59-64. | |
| Authors: | XU Fu-you CHEN Ai-rong ZHANG Jian-ren |
| Institution: | 1. Department of Bridge Engineering, Tongji University, Shanghai 200092, China; 2. School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China; 3. School of Bridge and Structural Engineering, Changsha University of Science and Technology, Changsha 410076, Hunan, China |
| Abstract: | The deviation coefficient of extreme wind speed was calibrated to be about 0.13 on the basis of wind-resistant design code for highway bridges.The values between 0.13 and(0.14) were also obtained according to the wind speed statistical data of Sutong Bridge site.A stochastic gradient algorithm which could be used for calculating structural reliability index was presented.The influences of variables distribution type and statistical characteristics on Sutong Bridge flutter reliability index were investigated considering multifold points of view using this algorithm.The result shows that 0.15 can be recommended as the deviation coefficient of extreme wind speed;the stochastic gradient algorithm is simple,steady and efficient. |
| Keywords: | bridge engineering cable supported bridge stochastic gradient algorithm flutter reliability extreme wind speed |
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