[1]吕 娜,郑晓龙,金怡新,等.高速铁路桥梁导风屏障挡风效果分析与验证[J].高速铁路技术,2024,15(05):78-82.[doi:10.12098/j.issn.1674-8247.2024.05.013]
　LV Na,ZHENG Xiaolong JIN Yixin,ZHANG He,et al.Analysis and Validation of Wind Shielding Effectiveness of Wind Deflectors on High-speed Railway Bridges[J].HIGH SPEED RAILWAY TECHNOLOGY,2024,15(05):78-82.[doi:10.12098/j.issn.1674-8247.2024.05.013]
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高速铁路桥梁导风屏障挡风效果分析与验证()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
15卷
期数:
2024年05期
页码:
78-82
栏目:
研究创新
出版日期:
2024-10-30

文章信息/Info

Title:
Analysis and Validation of Wind Shielding Effectiveness of Wind Deflectors on High-speed Railway Bridges
文章编号:
1674-8247(2024)05-0078-05
作者:
吕 娜1; 郑晓龙2; 金怡新1; 张 鹤1; 谢海清2
(1.成都亚佳工程新技术开发有限公司, 成都 610000; 2.中铁二院工程集团有限责任公司, 成都 610031)
Author(s):
LV Na1; ZHENG Xiaolong2 JIN Yixin1; ZHANG He1; XIE Haiqing2
(1.Chengdu Yajia Engineering New Technology Development Co., Ltd., Chengdu 610000, China; 2.China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China)
关键词:
铁路桥梁;  风屏障;  挡风性能;  实桥测试;  减风率
Keywords:
railway bridge;  wind barrier;  wind shielding performance;  field testing;  wind speed reduction rate
分类号:
U24
DOI:
10.12098/j.issn.1674-8247.2024.05.013
文献标志码:
A
摘要:
以某时速350 km高速铁路桥梁为例,在数值模拟和风洞试验的基础上,通过在桥垮1/4位置、跨中位置布置风速传感器,开展导风屏障-桥梁系统下的风速、风向现场测试,验证导风屏障的挡风效果。结果表明:(1)监测期内,1/4跨位置最大瞬时来流风速为10.5 m/s,跨中位置最大瞬时来流风速14 m/s;(2)安装导风屏障后,迎风侧轨道中心线2.5 m高度处风速折减率为40%～60%,3.5m高度风速折减率为30%～40%,且1/4跨和跨中在同一高度处风速折减率一致;(3)同一高度处,实桥测试的风速折减率小于风洞试验的风速折减率,主要原因为:现场风速、风向紊流度高,采集数据跳跃大,风洞试验中风速、风向固定; 现场测试没有列车,风洞试验有列车;(4)导风屏障的安装对降低轨道处风速,提高桥梁的安全行车效果明显。
Abstract:
With a 350 km/h high-speed railway bridge as the case for study, this study conducted wind speed and direction field tests on the bridge system incorporating wind deflectors at the quarter-span and midspan positions, based on numerical simulations and wind tunnel experiments. By deploying wind speed sensors at these locations, the effectiveness of the wind deflectors was empirically verified. Findings indicate that:(1)During the monitoring period, the maximum instantaneous upstream wind speed at the quarter-span position was 10.5 m/s, while at the midspan, it reached 14 m/s.(2)Following the installation of the wind deflector, wind speeds were reduced by 40% to 60% at a height of 2.5 m above the centerline of the windward track and by 30% to 40% at a height of 3.5 m. Notably, the wind speed reduction rates at corresponding heights were consistent between the quarter-span and midspan locations.(3)The wind speed reduction rates observed in actual bridge testing were lower than those obtained from wind tunnel experiments at the same height, primarily due to higher turbulence and larger fluctuations in wind speed and direction in the field, compared to the fixed wind conditions in the wind tunnel. Additionally, no train was present during field testing, whereas a train was included in the wind tunnel experiments.(4)The installation of wind deflectors effectively reduces wind speeds near the tracks, significantly enhancing the safe operational conditions of the bridge.

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备注/Memo

备注/Memo:
收稿日期:2023-04-13
作者简介:吕娜(1982-),女,工程师。
更新日期/Last Update: 2024-10-30