桥梁挡风障参数对行车稳定性影响分析  

Analysis on Influence of Bridge Wind Barrier Parameters on Driving Stability

作　　者：王兆樑 练江峰 詹铠臻 刘功毫 林立 WANG Zhao-liang;LIAN Jiang-feng;ZHAN Kai-zhen;LIU Gong-hao;LIN Li(Xiamen Highway Development Center,Xiamen Fujian 361000,China;Xiamen Zhongping Highway Survey and Design Institute Co.,Ltd.,Xiamen Fujian 361000,China;Fujian Provincial Key Laboratory of Wind Disaster and Wind Engineering,Xiamen Fujian 361024,China;Xiamen University of Technology,Xiamen Fujian 361024,China)

机构地区：[1]厦门市公路事业发展中心,福建厦门361000 [2]厦门中平公路勘察设计院有限公司,福建厦门361000 [3]福建省风灾害与风工程重点实验室,福建厦门361024 [4]厦门理工学院,福建厦门361024

出　　处：《公路交通科技》2022年第12期106-114,共9页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51708472);福建省自然科学基金项目(2020J01275);福建省普通公路科研项目(201010;201903;202022);福建省高校产学合作项目(2020H6022);厦门市风工程服务平台项目(3502Z20161016)。

摘　　要：为探究桥面横风作用下,桥梁挡风障高度、孔隙率、开孔形状参数对桥面行驶车辆稳定性影响规律,以及等效风速折减系数与车辆气动力对挡风障阻风性能两种指标评价结果的差异性,设计了孔隙率与高度范围分别为40%~60%,1~3 m的10组圆孔与障条形式的桥梁挡风障方案。分别于7.91 m/s和11.07 m/s两种试验来流风速条件下,测量典型3车道箱梁简化模型上,各行车道不同高度测点的风速及中间车道车辆模型气动六分力。分析挡风障参数变化对车辆行驶稳定性的影响规律,并对比桥梁挡风障等效风速折减系数与气动侧力、侧倾力矩无量纲后的系数,验证遮挡效果评价指标的一致性。试验结果表明:两种试验风速下,桥梁挡风障对其后方车辆遮挡效果规律一致,车辆模型气动侧力及侧倾力矩受挡风障孔隙率及高度参数影响明显,均随着挡风障高度增加而减小,随着挡风障的孔隙率增加而变大;气动升力主要受高度影响较大,且随高度增加先增加后减小,而与孔隙率关系不明显;等效风速折减系数与气动侧力折减系数及侧倾力矩折减系数偏差主要集中于0.01~0.10,不同评价指标得到结果具有一致性,采用等效风速折减系数作为风障挡风效率的评价指标更为直观有效,但需要考虑安装挡风障后桥面风场不同高度处压差变化对车辆气动升力产生的影响。In order to explore the influence of bridge wind barrier height,porosity,hole shape parameters on the driving stability of vehicles on bridge under the action of bridge deck cross wind,and the difference between the evaluation results of equivalent wind speed reduction coefficient and vehicle aerodynamic force on 2 indicators of wind barrier performance,the bridge wind barrier scheme in the form of 10 sets of round holes and barrier strips with gap ratio and height range of 40%-60%and 1-3 m respectively is designed.Under the conditions of 7.91 m/s and 11.07 m/s test incoming wind speeds respectively,the wind speeds at the measuring points at different heights of each traffic lane and the aerodynamic six-component force of the vehicle model in the middle lane on the typical 3-lane box girder simplified model are measured,the influence of wind barrier parameter changes on vehicle driving stability is analyzed,and the equivalent wind speed reduction coefficient of bridge wind barrier is compared with the dimensionless coefficients of aerodynamic side force and roll moment to verify the consistency of the evaluation indicators of the shielding effect.The test result shows that(1)Under the condition of 2 test wind speeds,the shielding effect of the bridge wind barrier on the rear vehicles is consistent.The aerodynamic side force and roll moment of the vehicle model are significantly affected by the wind barrier porosity and height,which decrease with the increase of the height of the wind barrier,and increase with the increase of the porosity of the wind barrier.(2)The aerodynamic lift is mainly affected by the height,and increases first and then decreases with the increase of height,but has no obvious relationship with porosity.(3)The deviations between equivalent wind speed reduction coefficient and aerodynamic side force reduction coefficient or roll moment reduction coefficient are mainly concentrated in 0.01 to 0.10.The results obtained by different evaluation indicators are consistent,it is more intuitive and ef

关 键 词：桥梁工程 评价指标 风洞试验 挡风障 参数 

分 类 号：U443.5[建筑科学—桥梁与隧道工程]