[1]王力东,李子强,沈永杰,等.双幅Π形梁斜拉桥涡振性能气动优化试验及机理[J].长安大学学报(自然科学版),2025,45(4):129-140.[doi:10.19721/j.cnki.1671-8879.2025.04.011]
　WANG Li-dong,LI Zi-qiang,SHEN Yong-jie,et al.Aerodynamic optimization test and mechanism of vortex-induced vibration properties for two parallel Π-shaped girder cable-stayed bridge[J].Journal of Chang’an University (Natural Science Edition),2025,45(4):129-140.[doi:10.19721/j.cnki.1671-8879.2025.04.011]
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双幅Π形梁斜拉桥涡振性能气动优化试验及机理()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年4期
页码:
129-140
栏目:
桥梁与隧道工程
出版日期:
2025-07-30

文章信息/Info

Title:
Aerodynamic optimization test and mechanism of vortex-induced vibration properties for two parallel Π-shaped girder cable-stayed bridge
文章编号:
1671-8879(2025)04-0129-12
作者:
王力东1; 2; 李子强1; 沈永杰1; 胡 朋1; 2; 王 雷3
(1. 长沙理工大学 土木与环境工程学院,湖南 长沙 410114; 2. 桥梁工程安全控制教育部重点实验室长沙理工大学,湖南 长沙 410114; 3. 广东省交通规划设计研究院集团股份有限公司,广东 广州 510507)
Author(s):
WANG Li-dong1; 2;  LI Zi-qiang1;  SHEN Yong-jie1;  HU Peng1; 2;  WANG Lei3
(1. School of Civil and Environmental Engineering, Changsha University of Science and Technology,Changsha 410114, Hunan, China; 2. Key Laboratory of Safety Control of Bridge Engineering of Ministry of Education, Changsha University of Science and Technology, Changsha 410114, Hunan, China; 3. Guangdong Communication Planning and Design Institute Group Co., Ltd., Guangzhou 510507, Guangdong, China)
关键词:
桥梁工程;  Π形梁斜拉桥;  双幅桥;  涡振性能;  抑振措施;  风洞试验
Keywords:
bridge engineering;  Π-shaped girder cable-stayed bridge;  two parallel bridge;  vortex-induced vibration property;  vibration suppression measure;  wind tunnel test
分类号:
U441.3
DOI:
10.19721/j.cnki.1671-8879.2025.04.011
文献标志码:
A
摘要:
以某双幅大跨度Π形梁斜拉桥为工程背景,通过1:25比例节段模型风洞试验研究了既有桥梁(旧桥)及其邻近新建桥梁(新桥)之间的气动干扰效应,测试了单独新桥、单独旧桥以及双幅桥在-3°风攻角下的主梁涡振响应; 针对双幅桥试验中新桥竖向涡振超规范限值和旧桥扭转振动显著的问题,采用封闭人行道栏杆,设置导流板、抑流板和下稳定板4种气动措施以及组合措施优化了主梁断面涡振性能; 通过计算流体动力学(CFD)数值模拟给出了新、旧桥原设计方案和施加抑振措施后主梁断面附近流场分布,揭示了气动优化试验中的抑振机理。研究结果表明:单独新桥主梁断面涡振显著且最大振幅超过规范限值,单独旧桥主梁无明显涡振现象; 双幅桥试验中,当新桥在来流上游时,新桥对旧桥产生了不利的气动干扰,使新、旧桥均出现显著的涡振现象,当旧桥在来流上游时,由于旧桥本身涡振性能较好且对新桥有遮挡效应,新、旧桥主梁均未发生涡振; 单一措施对新桥主梁涡振抑制效果有限,对新桥采用2道高2.2 m下稳定板+外侧防撞护栏抑流板的组合措施能有效将新、旧桥的涡振控制在规范限值的20%以内; 组合措施破坏了新桥梁底和桥面栏杆处规律性旋涡脱落的形成,改善了新、旧桥主梁附近的流场分布,极大提高了双幅桥的涡振性能。
Abstract:
Based on the engineering background of a two parallel long-span Π-shaped girder cable-stayed bridge, the 1:25 scale segmental model wind tunnel tests were conducted to investigate the aerodynamic interference effects between an existing bridge(old bridge)and its adjacent newly constructed bridge(new bridge). The vortex-induced vibration(VIV)responses of main girders of the new bridge, old bridge, and the two parallel bridge were tested under a wind attack angle of -3°. Addressing the issues of the vertical VIV amplitude exceeding the code limit for the new bridge and the significant torsional vibration for the old bridge during the two parallel bridge tests, four aerodynamic measures, including enclosing pedestrian railings, installing guide vanes, flow suppression plates and lower stabilizing plates, as well as their combinations, were employed to optimize the VIV properties of main girders. The computational fluid dynamics(CFD)numerical simulations were utilized to analyze the flow field distributions around the main girder sections for both the original and modified schemes of the new and old bridges. The vibration suppression mechanisms during the aerodynamic optimization test were revealed. The research results indicate that the new bridge exhibits significant VIV with the maximum amplitudes exceeding the code requirements, while the old bridge shows negligible VIV phenomena. During the two parallel bridge tests, when the new bridge is at the upstream of the airflow, adverse aerodynamic interference occurs from the new bridge to the old bridge, causing noticeable VIV in both structures. When the old bridge is at the upstream of the airflow, its inherent satisfactory VIV properties combined with shielding effects on the new bridge prevent VIV occurrence in both girders. Single aerodynamic measures provide limited VIV suppression for the new bridge, whereas a combined solution of two 2.2 m-high lower stabilizing plates combined with flow suppression plates on the outer anti-collision guardrail effectively controls VIV amplitudes within 20% of the code limits for both bridges. The combination measure disrupts the formation of regular vortex shedding patterns near the girder bottom and bridge deck railings, improves the flow field distributions around main girders of both the new and old bridges, and significantly enhances the VIV properties of the two parallel bridge.3 tabs, 18 figs, 30 refs.

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备注/Memo

备注/Memo:
收稿日期:2025-02-10
基金项目:国家自然科学基金项目(52208459); 湖南省教育厅科学研究项目(23B0312); 桥梁工程安全控制教育部重点实验室开放基金项目(22KB02); 长沙理工大学研究生科研创新项目(CSLGCX23149)
作者简介:王力东(1990-),男,湖南郴州人,副教授,博士研究生导师,E-mail:wangld@csust.edu.cn。
更新日期/Last Update: 2025-07-25