Abstract
There are two opposite viewpoints on flutter speed of long-span bridges in a turbulent flow. One is that it is destabilized with consideration of build-up time to flutter. The other is that it is stabilized due to the loss of spatial correlation of aeroelastic forces. In addition, both viewpoints were confirmed by wind-tunnel studies. In this research, executing flutter analyses with the loss of aeroelastic-force spatial correlation and comparing the results with a fullmodel wind-tunnel test of the Akashi Kaikyo Bridge performed in smooth and turbulent flows, effects of wind-speed fluctuations in a turbulent flow on flutter speed of long span bridges were investigated. As a result, the analysis showed flutter-speed increase due to the loss of correlation, however the evidence was not observed in the wind-tunnel test.
