ABSTRACT
Connection sections of successive tunnels are mostly located in the canyon between two mountains, where the wind speed is higher than the nearby flat ground because of terrain effects. One common design pattern of successive-tunnel connection sections is the parallel twin-deck bridges. Previous studies mainly focused on the wind-load study of bridges instead of considering the crosswind effects on driving safety. In order to study the influence of crosswind on vehicles on twin-deck bridges, numerical simulation models were established to simulate the wind field when the vehicle drives on different lanes of the twin-deck bridges. It was concluded that the vehicle driving on the first lane of the twin-deck bridges is with the greatest accident risk. And the crosswind speed change causes severe changes of vehicle aerodynamic force, which may lead to driving fatigue and driving error.
