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双层公路钢桁梁桥车桥耦合振动

刘永健 刘世忠 米静 程高

刘永健, 刘世忠, 米静, 程高. 双层公路钢桁梁桥车桥耦合振动[J]. 交通运输工程学报, 2012, 12(6): 20-28. doi: 10.19818/j.cnki.1671-1637.2012.06.004
引用本文: 刘永健, 刘世忠, 米静, 程高. 双层公路钢桁梁桥车桥耦合振动[J]. 交通运输工程学报, 2012, 12(6): 20-28. doi: 10.19818/j.cnki.1671-1637.2012.06.004
LIU Yong-jian, LIU Shi-zhong, MI Jing, CHENG Gao. Vehicle-bridge coupled vibration of highway double-deck steel truss bridge[J]. Journal of Traffic and Transportation Engineering, 2012, 12(6): 20-28. doi: 10.19818/j.cnki.1671-1637.2012.06.004
Citation: LIU Yong-jian, LIU Shi-zhong, MI Jing, CHENG Gao. Vehicle-bridge coupled vibration of highway double-deck steel truss bridge[J]. Journal of Traffic and Transportation Engineering, 2012, 12(6): 20-28. doi: 10.19818/j.cnki.1671-1637.2012.06.004

双层公路钢桁梁桥车桥耦合振动

doi: 10.19818/j.cnki.1671-1637.2012.06.004
基金项目: 

高等学校博士学科点专项科研基金项目 20090205110002

国家自然科学基金项目 51178051

详细信息
    作者简介:

    刘永健(1966-), 男, 江西玉山人, 长安大学教授, 工学博士, 从事钢桥与组合结构桥梁理论及应用研究

  • 中图分类号: U441.3

Vehicle-bridge coupled vibration of highway double-deck steel truss bridge

More Information
    Author Bio:

    LIU Yong-jian(1966-), male, professor, PhD, +86-29-82334577, steellyj@126.com

  • 摘要: 为研究车桥耦合振动对双层公路钢桁桥冲击效应的影响, 基于分离法, 以车轮与桥面接触点为界, 将车桥耦合振动系统分为车辆与桥梁2个子系统, 分别采用虚功原理与有限元法建立各自的运动方程, 并通过车轮与桥面接触处的位移协调条件及车桥相互作用力的平衡关系相联系, 采用迭代法求解系统响应。以某双层公路简支钢桁梁桥为研究对象, 应用ANSYS软件建立三维梁格有限元模型, 分析了车速、桥梁阻尼、桥面平整度及不同加载模式对车桥耦合振动的影响。研究结果表明: 车速与双层钢桁梁桥冲击系数之间没有规律性的函数关系; 桥梁阻尼增大, 能使钢桁桥杆件内力、位移冲击系数适当降低; 桥面平整度是车桥耦合振动的一个重要激励, 桥面状况越差则车辆振动越强烈, 对桥梁的整体和局部产生的冲击作用越大; 单双层加载模式的不同对桥梁整体的动力响应改变不大, 但是对局部动力响应的影响比较明显, 应在桥梁设计时考虑局部冲击效应的影响。

     

  • 图  1  四自由度半车模型

    Figure  1.  1/2vehicle model with four freedoms

    图  2  桥面平整度

    Figure  2.  Bridge surface roughnesses

    图  3  车桥耦合振动计算流程

    Figure  3.  Solution flow of vehicle-bridge coupled vibration

    图  4  简支梁跨中位移响应曲线

    Figure  4.  Response curves of mid-span vertical displacement for simply-supported beam

    图  5  桥梁总体布置

    Figure  5.  General layout of bridge

    图  6  有限元模型

    Figure  6.  Finite element models

    图  7  不同桥面平整度时主要杆件轴力时程与冲击系数

    Figure  7.  Axial force time histories and impact factors of main bars with different bridge surface roughnesses

    表  1  技术参数

    Table  1.   Technical parameters

    下载: 导出CSV

    表  2  不同车速时主要杆件动力响应

    Table  2.   Dynamic responses of main bars at different vehicle speeds

    下载: 导出CSV

    表  3  不同阻尼比时主要杆件动力响应

    Table  3.   Dynamic responses of main bars with different damping ratios

    下载: 导出CSV

    表  4  不同加载模式时主要杆件动力响应

    Table  4.   Dynamic responses of main bars with different loading modes

    下载: 导出CSV
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出版历程
  • 收稿日期:  2012-08-02
  • 刊出日期:  2012-12-25

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