Abstract
The authors clarified the aerodynamic characteristics of the pentagonal cross-section girder that might have enough aerodynamic stability without using additional devices and investigated the aerodynamic stable mechanism by conducting various wind tunnel tests in a static state. As a result, it was found that the aerodynamic characteristics of the girder depend on the lower flange slope because the magnitude of the flow separation from the lower slope portion depend on the lower flange slope and the pressure distributions are different based on the lower flange slope, and the girder corss-section with the lower flange slope of 12deg. is the most recommended for the girder for the cable-stayed bridge.
