桥梁气动外形改变对大跨桁梁桥抗风性能影响研究
作者:
作者单位:

(1.拉萨市设计集团有限公司 ,西藏 拉萨 850000 ;2西南交通大学 风工程四川省重点实验室 ,四川 成都 610031 )

作者简介:

敬大德,男,硕士,高级工程师.E-mail:suyi8@my.swjtu.edu.cn

通讯作者:

中图分类号:

U442.5+9

基金项目:

国家自然科学基金资助项目(编号:52008357)


Influence of Aerodynamic Shape Change on Wind Resistance Performance of Large Span Truss Bridge
Author:
Affiliation:

(1.Lhasa Municipality Design Group Co ., Ltd., Lhasa , Xizang 850000 , China ; 2.Wind Engineering Key Laboratory of Sichuan Province , Southwest Jiaoto ng University , Chengdu , Sichuan 610031 , China )

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    随着交通业及旅游业的发展,近年来不断出 现桥梁在满足其交通运输功能的前提下同时开发诸如旅游等方面的其他可利用功能,导致结构气动外形及透风率发生显著变化。该文以某主跨 1 088 m的双塔单跨钢桁架悬索桥为背景,通过全桥气弹模型风洞试验对其抗风性能进行重新评估,在研究结构抗风稳定性的前提下评估行人舒适度问题。结果表明:基于景区开发的桥梁气动外形改变前后结构动力特性几乎不变,且均未发生涡激振动及颤振等空气动力失稳;气动外形改变后结构横向及竖向的静风位移响应明显增大,在扭转方向二者存在一定差异但没有显著的规律性;基于景区开发的桥梁气动外形改变导致结构竖向抖振响应减小,但横向及扭转抖振响应均显著增大,经计算,结构舒适度满足设计要求。

    Abstract:

    The development of the transportation an d tourism industry has led to bridges fulfilling additional roles,such as tourism,alongside their transportation functions,resulting in significant changes in structural aerodynamic shape and ventilation rate.This paper analyzed a double-tower single-span steel truss suspension bridge with a main span of 1 088 m,re-evaluated its wind resistance performance through the full-bridge aeroelastic model wind tunnel test,and evaluated the pedestrian comfort problem while studying the wind-resistant stability of the structure.The results indicate that the structural dynamic characteristics of the bridge remain almost unchanged before and after altering the aerodynamic shape of the bridge for its scenic spot function,with no aerodynamic instabilities like vortex-induced vibration or flutter.After changing the aerodynamic shape,there is a noticeable increase in both lateral and vertical static-wind displacement responses,with a certain difference between the two in the torsional direction,whereas no clear pattern emerges.The change in the aerodynamic shape of the bridge,designed around a scenic spot,results in a decreased vertical buffeting response,while the lateral and torsional buffeting responses show a significant increase.After calculation,the structural comfort meets design requirements.

    参考文献
    相似文献
    引证文献
引用本文

敬大德,苏益.桥梁气动外形改变对大跨桁梁桥抗风性能影响研究[J].中外公路,2024,44(1):119-125.
JING Dade, SU Yi. Influence of Aerodynamic Shape Change on Wind Resistance Performance of Large Span Truss Bridge[J]. Journal of China and Foreign Highway,2024,44(1):119-125.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2022-09-09
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2024-03-18
  • 出版日期: