WIND BARRIER FOR THE SAFETY OF VEHICLE RUNNING ON THE BRIDGE UNDER CROSS WIND

摘要

Ventilation ratio is one of the important factors that affect the sheltering efficiency of wind barrier.Under the protection of wind barriers,it gained the aerodynamic coefficients of vehicles on bridge deck via the wind tunnel test of the scale section model.The natural wind,vehicle and bridge were regarded as an interacting system,and a three-dimensional analytical model for wind-vehicle-bridge coupling vibration system was presented.The judging criteria for the running safety of vehicle are proposed according to the dynamic response of vehicles.It has investigated the effects of ventilation ratios of wind barrier on the running safety of vehicles.Results show it is surely wind barrier,provided a ventilation rate of 50％,will achieve the purpose of protecting the running safety of vehicles.