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桥塔抗弯刚度随机性对斜拉桥动力特性的影响

黄斌,  李烨君,  朱礼平,  张卫东

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文章导航 > 西南交通大学学报  > 2014 >  27(2): 202-207.
黄斌, 李烨君, 朱礼平, 张卫东. 桥塔抗弯刚度随机性对斜拉桥动力特性的影响[J]. 西南交通大学学报, 2014, 27(2): 202-207. doi: 10.3969/j.issn.0258-2724.2014.02.003
引用本文: 黄斌, 李烨君, 朱礼平, 张卫东. 桥塔抗弯刚度随机性对斜拉桥动力特性的影响[J]. 西南交通大学学报, 2014, 27(2): 202-207. doi: 10.3969/j.issn.0258-2724.2014.02.003
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HUANG Bin, LI Yejun, ZHU Liping, ZHANG Weidong. Effects of Towers Random Sectional Bending Stiffness on Dynamic Characteristics of Large-Span Cable-Stayed Bridge[J]. Journal of Southwest Jiaotong University, 2014, 27(2): 202-207. doi: 10.3969/j.issn.0258-2724.2014.02.003
Citation: HUANG Bin, LI Yejun, ZHU Liping, ZHANG Weidong. Effects of Towers Random Sectional Bending Stiffness on Dynamic Characteristics of Large-Span Cable-Stayed Bridge[J]. Journal of Southwest Jiaotong University, 2014, 27(2): 202-207. doi: 10.3969/j.issn.0258-2724.2014.02.003
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桥塔抗弯刚度随机性对斜拉桥动力特性的影响

doi: 10.3969/j.issn.0258-2724.2014.02.003
基金项目: 

国家自然科学基金资助项目（51078297）

详细信息
    作者简介:

    黄斌（1968-），男，教授，博士，研究方向为结构工程、防灾减灾工程等，E-mail：biwhuang@263.net

Effects of Towers Random Sectional Bending Stiffness on Dynamic Characteristics of Large-Span Cable-Stayed Bridge

    摘要
  • 摘要: 为了研究大跨斜拉桥结构参数不确定情形的动力特性，建立了鄂东长江大桥的平面有限元模型.考虑桥塔截面抗弯刚度的随机性，利用递推随机有限元法，分析了大跨斜拉桥频率和振型的均值和均方差.在此基础上，研究了桥塔截面抗弯刚度随机性对大跨斜拉桥动力特性的影响.研究结果表明，当桥塔截面抗弯刚度变异系数达到0.3时，桥塔截面抗弯刚度的不确定性对鄂东长江大桥平面内第18、19、29、34、37和43阶频率和振型有较大影响.

     

    Abstract: In order to investigate the dynamic characteristics of large span cable-stayed bridges with uncertain structural parameters, the plane FEM model of Edong Yangtze River bridge was established. In view of the randomness of sectional bending stiffness of the towers, the mean and standard deviation of the natural frequencies and vibration modes of the cable-stayed bridge were analyzed using recursive stochastic finite element method. Based on the calculated random dynamic parameters of this bridge, the effects of randomness of the towers' sectional bending stiffness on dynamic characteristics of large span cable-stayed bridge were discussed. The results show that when the variation coefficient of bending stiffness reaches 0.3, the randomness of the bending stiffness has great influence on the 18th, 19th, 29th, 34th, 37th, and 43th order in-plane natural frequencies and vibration modes of Edong Yangtze River bridge.

     

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出版历程
  • 收稿日期:  2013-06-30
  • 刊出日期:  2014-03-25

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