AERODYNAMIC COUNTERMEASURES FOR SUPPRESSING WAKE GALLOPING APPEARED IN TANDEM CABLES OF CABLE-STAYED BRIDGES

Abstract

This paper deals with a new type of aerodynamic countermeasure developed for suppressing wake galloping in tandem cables of cable-stayed bridges. Wind tunnel experiments have been carried out to obtain the drag coefficients and control wake galloping. It was ascertained that surface patterned cables by dimples have drastic effect of raising the apparent Reynolds number and decreasing the exciting force of wake galloping compared to the other types of cables by introducing roughness on their surface.