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石紫琳¹，李玉学^1，2，3，胡志勇⁴

 

 

（1.石家庄铁道大学 土木工程学院，石家庄 050043；2.河北省风工程与风能利用工程技术创新中心，石家庄 050043；3.石家庄铁道大学 道路与铁道工程安全保障省部共建教育部重点实验室，石家庄 050043；4.中国铁路南昌局集团有限公司，南昌 330002）

摘要：为保证大跨人行悬索桥能够同时兼顾行人舒适性和结构安全性，依托主跨152 m的景区人行悬索桥为工程背景，采用计算和CFD数值模拟的方法，得到该桥主梁涡振的竖弯振幅和扭转振幅限值，通过设计最大风速和风攻角范围内该桥实际涡振最大竖弯和扭转涡振幅值，进行舒适度分析。结果表明：随着风攻角由正转负，大跨人行桥主梁竖弯涡振性能变差，最不利竖弯涡振出现在0°风攻角下，可以满足符合安全的竖弯涡振振幅但超过了符合舒适度的涡振振幅限值；随着风攻角由负转正，大跨人行桥主梁扭转涡振性能变差，其风速锁定区间向高风速区偏移，最不利扭转涡振出现在3°风攻角下，既超过满足符合安全的竖弯涡振振幅，也超过了符合舒适度的涡振振幅限值。研究得出考虑行人舒适度的大跨人行悬索桥涡振振幅限值标准更为严格，研究成果可为大跨人行悬索桥振幅限值计算提供依据。

关键词：大跨人行悬索桥；行人舒适度；涡振限值；竖弯幅值；扭转幅值

中图分类号：U448.11；U448.25

文献标志码：A

文章编号：1005-8249（2025）06-0076-06

DOI：10.19860/j.cnki.issn1005-8249.2025-06-014

 

 

SHI Zilin¹,LI Yuxue^1,2,3,HU Zhiyong⁴

 

 

(1.School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China；

 

2.Innovation Center for Wind Engineering and Wind Energy Technology of Hebei Province,

 

Shijiazhuang 050043,China；3.Key Laboratory of Roads and Railway Engineering Safety

 

Control of China Ministry of Education,Shijiazhuang Tiedao University,Shijiazhuang 050043,China；4.China Railway Nanchang Group Co.,Ltd.,Nanchang 330002,China)

 

Abstract：To ensure that the long-span pedestrian suspension bridge can simultaneously take into account pedestrian comfort and structural safety,relying on the scenic area pedestrian suspension bridge with a main span of 152 meters as the engineering background,the limit values of the vertical bending amplitude and torsional amplitude of the vortex vibration of the main beam of the bridge were obtained by using the methods of calculation and CFD numerical simulation.Comfort analysis was conducted by designing the maximum vertical bending and torsional vortex amplitude values of the actual vortex vibration vibration of the bridge within the range of the maximum wind speed and wind attack Angle.The results show that as the wind attack Angle changes from positive to negative,the vertical bending vortex vibration performance of the main beam of the long-span pedestrian bridge deteriorates.The most unfavorable vertical bending vortex vibration occurs at a wind attack Angle of 0°,which can meet the safe vertical bending vortex vibration amplitude but exceeds the vortex vibration amplitude limit that meets the comfort level;As the wind attack Angle changes from negative to positive,the torsional vortex vibration performance of the main beam of the long-span pedestrian bridge deteriorates.The wind speed locking range shifts towards the high wind speed zone.The most unfavorable torsional vortex vibration occurs at a 3°wind attack Angle,which not only exceeds the vertical bending vortex vibration amplitude that meets safety requirements but also exceeds the vortex vibration amplitude limit that meets comfort requirements.The research concludes that the limit standards for vortex vibration amplitude of long-span pedestrian suspension Bridges considering pedestrian comfort are stricter.The research results can provide a basis for the calculation of amplitude limit values of long-span pedestrian suspension Bridges.

 

Key words：long span pedestrian suspension bridge;pedestrian comfort;eddy vibration limit;vortex amplitude;acceleration amplitude

 

基金项目：国家自然科学基金资助项目(51278314)；河北省自然科学基金资助项目(E2019210031)；中央引导地方科技发展资金项目(206Z5401G)；北京交通大学“结构风工程与城市风环境北京市重点实验室”开放课题（2023-1）。

作者简介：石紫琳(1997—)，女，硕士研究生，研究方向:桥梁工程。

收稿日期：2025-02-24