Running Safety of Vehicle on the Bridge under the Sudden Change of Wind Loads Due to Wind Barriers

Wind barriers are the efficient and simplest devices for the wind protection of vehicle. To investigate the dynamic responses of vehicle passes through the transition section of wind barriers, a high-speed railway simplysupported beam bridge was taken as the research object. Aerodynamic characteristics of vehicle-bridge system were tested in wind tunnel tests, and the effects of wind barrier porosities were considered. The wind-vehicle-bridge (WVB) coupling analysis was conducted by Dummy Body Coupling (DBC) method. The results show that dynamic responses of the vehicle generally tend to increase with the increase in speed. In the wind barrier section, the dynamic responses would decrease, accounting for the wind shielding effects. The lateral and vertical accelerations are sensitive to the sudden changes of wind loads due to the wind barrier, while the lateral force and reduction rate of wheel load have little sudden change when the vehicle enters and leaves the wind barrier section.