Aerodynamic stability is one of the most important themes in the design of super long-span bridges, and various methods for stabilization have been investigated. This paper deals with the effect of a tuned pendulum damper(TPD)on bridge deck flutter, and describes an analytical and experimental studies on the effectiveness of TPD in suppressing the wind-induced coupled flutter of a bridge deck. The flutter analysis and a wind tunnel test for a two-dimensional bridge deck model was performed. The flutter speed was increased by 20∼30% by TPD with 5% mass. Moreover, the mechanism of flutter suppression by TPD has been investigated by Bode's diagram. It was cleared that the mechanism of that was due to the decreasing the response of the deck torsional mode and the changing the phase of a flutter system.
