基于车桥耦合的钢-混结合段刚度平顺性分析

刘全民; 李小珍; 张迅; 张志俊; 李亚东

doi:10.3969/j.issn.0258-2724.2013.05.005

基于车桥耦合的钢-混结合段刚度平顺性分析

doi: 10.3969/j.issn.0258-2724.2013.05.005

刘全民^1,2,
李小珍^1,2, ,,
张迅^1,2,
张志俊^1,2,
李亚东²

基金项目:

国家自然科学基金资助项目(50678150,51008250)

新世纪优秀人才支持计划资助项目(NCET-10-0701)

国家863计划资助项目(2011AA11A103)

四川省应用基础研究资助项目(2010JY0026)

详细信息

通讯作者:
李小珍(1970-),男,教授,博士生导师,研究方向为车桥耦合振动、桥梁减振降噪等,E-mail:xzhli@swjtu.cn

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出版历程
- 收稿日期: 2012-12-10
- 刊出日期: 2013-10-25

Stiffness Transition Analysis of a Steel-Concrete Joint Section Based on Vehicle-Bridge Interaction

LIU Quanmin^1,2,
LI Xiaozhen^{1,2
, ,},
ZHANG Xun^1,2,
ZHANG Zhijun^1,2,
LI Yadong²

摘要

摘要: 为了研究混合梁桥结合段动力平顺性问题,针对某混合梁独塔斜拉桥,将结合段按刚度等效换算为同一种材料,建立桥梁有限元模型;基于9个自由度的三轴车辆模型,根据规范规定的路面粗糙度谱,用三角级数法模拟了B级粗糙度样本,采用Newmark-β法求解车桥系统运动方程,建立了汽车-桥梁垂向耦合振动仿真模型.在此基础上,编制了车桥耦合振动分析程序,求解了桥梁结合段和车辆的动力响应. 研究结果表明:路面粗糙度下降一个等级,桥梁结合段竖向加速度增加一倍;从动力性能角度分析,钢-混结合段钢格室全填充时的刚度平顺性略优于半填充时的刚度平顺性.
- 混合梁 /
- 钢-混结合段 /
- 车桥耦合振动 /
- 刚度平顺性 /
- 动力仿真
Abstract: In order to study the dynamic stiffness transition issue of hybrid girder bridges, a vertical vehicle-bridge coupled vibration model was built for a cable-stayed bridge with single tower. In the coupled vibration model, a finite element model for the bridge was established by converting the joint section to the same material according to the equivalent stiffness law, a tri-axial vehicle model with 9 degrees of freedom (DOFs) was adopted, the sample of class B road roughness was simulated from the roughness spectrum in the national code by the trigonometric series method, and the motion equations of the coupled vehicle-bridge system were solved by Newmark-β method. According to the vehicle-bridge coupled vibration model, the dynamic analysis codes of the vehicle-bridge interaction were programmed to solve the system's dynamic responses under different conditions. The results show that the vertical acceleration of joint section will double if the road roughness decreases a grade; in dynamic behavior, the dynamic transition of the fully filled joint section is slightly smoother than that of the half filled.
- hybrid girder /
- steel-concrete joint section /
- vehicle-bridge interaction /
- stiffness transition /
- dynamic simulation

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参考文献(13)

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文章访问数: 1089
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PDF下载量: 420
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基于车桥耦合的钢-混结合段刚度平顺性分析

doi: 10.3969/j.issn.0258-2724.2013.05.005

通讯作者: 李小珍(1970-),男,教授,博士生导师,研究方向为车桥耦合振动、桥梁减振降噪等,E-mail:xzhli@swjtu.cn

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Stiffness Transition Analysis of a Steel-Concrete Joint Section Based on Vehicle-Bridge Interaction

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目录

通讯作者:
李小珍(1970-),男,教授,博士生导师,研究方向为车桥耦合振动、桥梁减振降噪等,E-mail:xzhli@swjtu.cn