Wind Tunnel Tests on Aerodynamic Characteristics of Train-Bridge System for Long-span Steel Box Girder Railway Suspension Bridge
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.
railway bridgeaerodynamic characteristicexperimental studytrain-bridge systemsteel box girder suspension bridgesectional model
NETL
NSTL
万方数据
