WIND-VEHICLE-BRIDGE SYSTEM COUPLING VIBRATION AND TRAFFIC SAFETY ANALYSIS

Strong wind not only controls the design of long span bridges, but also directly affects the traffic safety of vehicles on the bridges. Based on the coupled vibration analysis of a wind-road vehicles-bridge system, the wind-induced vehicle accident analysis is improved, since the probability of a statistical method was adopted in the criterion of vehicles side-lurch accidents and side slipping accidents. In the case study, the dynamic response of a bridge under strong wind was investigated, and the safety operation of vehicles was evaluated. The traffic critical wind speed of side-lurch and side-slipping for the moving vehicles at dry, wet, snow, ice road conditions were calculated, respectively. Accordingly, the vehicle speed limit at strong wind conditions is proposed for the management of traffic safety.