The Analysis of Wind-Induced Static Displacements and Flutter for Long-Span Suspension Bridges Using Steady and Unsteady Aerodynamic Forces Measured at High Reynolds Numbers

摘要

The authors have investigated Reynolds number effects on the steady and the unsteady aerodynamic forces on twin-box-bridge section models of different scales in three different wind tunnels measured over a wide Reynolds number range from 1.1x10~4 to 1.5x10~6 based on the dimension of deck height. This paper presents the analytical results of wind-induced static displacements and flutter speeds for a suspension bridge with a main span of 2500m using a three-dimensional analytical model in order to investigate Reynolds number effects further on the steady and the unsteady aerodynamic forces. Also, the paper considers amplitude effects on both the unsteady aerodynamic forces and the predicted flutter speeds.