| 千米级斜拉桥主梁挠度非线性随机静力分析 |
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| 引用本文： | 刘晓銮,张杨永,周云岗.千米级斜拉桥主梁挠度非线性随机静力分析[J].石家庄铁道学院学报,2011(2):1-5. |
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| 作者姓名： | 刘晓銮 张杨永 周云岗 |
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| 作者单位： | 同济大学桥梁工程系,上海200092 |
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| 基金项目： | 国家自然科学基金资助（51008223）;上海市浦江人才计划（09PJ1409500） |
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| 摘 要： | 采用响应面法对千米级斜拉桥主梁最大挠度进行静力可靠度分析，考察主梁最大挠度随结构材料、几何尺寸及外荷载等不确定因素的变异而发生变化的规律。算例研究表明，主梁挠度可靠指标对各随机变量平均值和标准差的敏感程度不同。同其它随机变量相比，斜拉索弹性模量变异对千米级斜拉桥主梁挠度影响最为显著。主梁截面面积变异对千米级斜拉桥主梁挠度具有显著的影响，但与对千米以下斜拉桥主梁挠度的影响规律不同。
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| 关 键 词： | 斜拉桥 挠度 几何非线性 随机静力分析 响应面法 |
Nonlinear Stochastic Static Analysis of Deflection of Main Girder of Kilometer-class Cable-stayed Bridge |
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| Liu Xiaoluan,Zhang Yangyong,Zhou Yungang.Nonlinear Stochastic Static Analysis of Deflection of Main Girder of Kilometer-class Cable-stayed Bridge[J].Journal of Shijiazhuang Railway Institute,2011(2):1-5. |
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| Authors: | Liu Xiaoluan Zhang Yangyong Zhou Yungang |
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| Institution: | ( Department of Bridge Engineering, Tongji University, Shanghai 200092, China) |
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| Abstract: | Nonlinear stochastic static analysis is carried out for the maximum deflection of main girder of a kilometer-class cable-stayed bridge by response surface method （RSM）. The law of main girder＇ s deflection is researched with the variation of structural parameters such as material properties, geometric dimensions and ex- ternal load, etc. Numerical results show that/he reliability index of main girder＇ s deflection has different sensi- tivity to the mean value and standard deviation of random variables. The variation of the modulus of stay cables has significant influence on the deflection of main girder of kilometer-class cable-stayed bridge compared to other random variables. The variation of the section area of main girder also has influence on the deflection of kilometer-class cable-stayed bridge, but is different from the influence on the deflection of under-kilometer cable-stayed bridge. |
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| Keywords: | cable-stayed bridge deflecti on geometrical nonlinearity stochastic static analysis response surface method |
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