大跨度钢箱梁铁路悬索桥车桥系统气动特性风洞试验研究  

Wind Tunnel Tests on Aerodynamic Characteristics of Train⁃Bridge System for Long⁃span Steel Box Girder Railway Suspension Bridge

作　　者：戴金元 封周权[1,2] 万田保[3] 王东绪[3] 华旭刚[1,2] DAI Jinyuan;FENG Zhouquan;WAN Tianbao;WANG Dongxu;HUA Xugang(Hunan Provincial Key Laboratory of Wind and Bridge Engineering,Hunan University,Changsha 410082,China;State Key Laboratory of Bridge Safety and Resilience(Hunan University),Changsha 410082,China;China Railway Major Bridge Reconnaissance&Design Institute Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]湖南大学风工程与桥梁工程湖南省重点实验室,长沙410082 [2]桥梁工程安全与韧性全国重点实验室(湖南大学),长沙410082 [3]中铁大桥勘测设计院集团有限公司,武汉430056

出　　处：《铁道建筑》2024年第8期78-83,共6页Railway Engineering

基　　金：湖南省自然科学基金(2021JJ30106);重庆市自然科学基金(CSTB2022NSCQ-MSX1465)。

摘　　要：为研究大跨度钢箱梁铁路悬索桥车桥系统气动特性,利用水平和竖向两套三分力测试装置,对一座大跨度钢箱梁铁路悬索桥进行节段模型测力风洞试验。研究不同风攻角下桥面无车、不同位置有单列车、双车共存时车辆和桥梁的气动特性及其相互影响,得到不同车桥组合下车辆与桥梁的气动力。试验结果表明,车桥间的气动干扰较为明显,列车会增大主梁的阻力系数,改变桥梁升力系数的变化趋势,且单列列车位于背风侧时主梁的气动性能最差,最大阻力系数增加了191%。同时,两辆列车之间存在一定的气流干扰,背风侧列车受迎风侧列车影响较大,其横向力系数显著下降,但竖向力系数和扭矩系数所受影响不大。To investigate the aerodynamic characteristics of a train-bridge system for a long-span steel box girder railway suspension bridge,two sets of three-force testing devices,the horizontal one and the other vertical one,were employed.Wind tunnel tests were conducted on a sectional model of a specific long-span steel box girder railway suspension bridge.The experiments focused on the aerodynamic characteristics of trains and bridges and their mutual influence when there is no train on the bridge deck under different wind angles of attack,single train at different positions,and two-train coexistence,and the respective aerodynamic forces of trains and bridges under different train-bridge combinations were obtained.The experimental results show that the aerodynamic interference between the trains and bridges is more obvious,and the presence of the train increases the drag coefficient of the main girder and changes the trend of the bridge lift coefficient,and the aerodynamic stability of the main girder is the worst when a single train is located on the leeward side,and the maximum drag coefficient is increased by 191%.At the same time,there is also a certain airflow interference between the two trains,the leeward side train is more affected by the windward side train,and its horizontal force coefficient decreases significantly,but has little effect on the vertical force coefficient and moment coefficient.

关 键 词：铁路桥梁 气动特性 试验研究 车桥系统 钢箱梁悬索桥 节段模型 

分 类 号：U448.12[建筑科学—桥梁与隧道工程]