| 大跨度变截面连续箱梁桥车桥耦合振动分析 |
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| 引用本文： | 刘鹏,莫林辉,李世慧,杨国梁.大跨度变截面连续箱梁桥车桥耦合振动分析[J].中南公路工程,2011(3):11-15,29. |
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| 作者姓名： | 刘鹏 莫林辉 李世慧 杨国梁 |
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| 作者单位： | 湖南省吉怀高速公路建设开发有限公司;湖南省交通规划勘察设计院; |
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| 摘 要： | 基于桥梁工程中广泛应用的变截面连续箱梁桥受移动车辆荷载作用时的振动方程解析解难以得到，本文运用桥梁结构动力学和有限元方法，对Euler—Bernoulli梁单元采用二节点的Hermite形函数，在假定的变截面模式基础上，推导了梁高呈抛物线变化箱形截面梁单元的刚度矩阵和质量矩阵。在时域中采用精细时程积分法，编制了桥梁动力响应数值计算程序，对长沙市某工程中变截面连续箱梁桥在车辆通过时的振动响应进行了分析，研究了车辆速度和加速度变化对桥梁挠度的影响。模拟结果与已发表的文献吻合较好，挠度满足规范要求，表明该桥具有良好的刚度。
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| 关 键 词： | 连续箱梁桥 大跨度 精细积分 刚度 动力响应 数值模拟 |
Vehicle-bridge Coupling Vibration Analysis of Long-span Continuous Box Girder Bridge with Variable Cross Section |
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| LIU Peng,MO Linhui,LI Shihui,YANG Guoliang.Vehicle-bridge Coupling Vibration Analysis of Long-span Continuous Box Girder Bridge with Variable Cross Section[J].Central South Highway Engineering,2011(3):11-15,29. |
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| Authors: | LIU Peng MO Linhui LI Shihui YANG Guoliang |
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| Institution: | LIU Peng1,MO Linhui1,LI Shihui2,YANG Guoliang1(1.Hunan Jihuai Expressway Construction & Development Ltd,Huaihua,Hunan 418000,China,2.Hunan Provincial Highway Planning Survey and Design Institute,Changsha,Hunan 410008,China) |
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| Abstract: | Based on the comprehensive application of continuous box girder bridge with variable cross section in bridge engineering currently,it's difficult to get a analytical solution in vibration equation under moving vehicle loads.In this paper,bridge structural dynamics and the finite element method were adopted.Hermite interposition function of two-nodes for Euler-Bernoulli beam element was utilized.Based on presuming mode of a non-uniform rectangular cross section beams with parabolic variable heights in a plan... |
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| Keywords: | continuous box girder bridge long-span precise integral rigidity dynamic response numerical simulation |
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