This paper investigates aerodynamic countermeasures using 2-edge girder sections for a cable-stayed bridge. Wind tunnel tests were conducted to confirm the performance of the new countermeasures. Additional structural countermeasures based on increasing the rigidity of the bridge were also investigated. This study concluded that the addition of a horizontal member at the top of the tower is the most effective method for increasing the flutter onset velocity. These aerodynamic countermeasures were also found to be economical.

Aerodynamic countermeasure, Cable-stayed bridge, 2-edge girder section, Spring-supported tests