Study on interaction aerodynamics of vehicle-bridge system under wind actions

摘要

In this study, a computational framework for performing vehicle-bridge interaction dynamics in cross winds was presented using iterative method. To investigate the interaction aerodynamics of a vehicle running on a bridge under cross wind actions, a 3D finite element model of a cable-stayed bridge subjected to moving vehicles is represented. Here, the cross winds including both steady and unsteady aerodynamic forces acting on the vehicle-bridge system are generated using spectral representation method and simulated (measured) aerodynamic coefficients along the bridge in the temporal and spatial domain. With the simulated wind forces, the vehicle-bridge system in cross winds can be composed into two subsystems: bridge-wind subsystem and vehicle-wind subsystem, and then an iterative schemes is employed to compute the interaction response between the two subsystems. By the present vehicle-bridge-wind coupling model, the aerodynamic response of a vehicle running on a cable-stayed bridge in cross winds will be presented in numerical examples.