Abstract
A cable-stayed bridge, which is a flexible structure and easy to oscillate due to wind action, requires an aerodynamic investigation for each design.Some examples of the aerodynamic test results of the cable-stayed bridges in United States of America are presented here.Many of the designed bridge decks meet vortex-excited oscillations.In some cases the countermeasures to prevent the oscillations are introduced, in other cases the checks are done whether the amplitude of oscillation is allowable.The design damping and the tolerance level to oscillation are the important factors to assess the safety and the usability of a bridge under vortex-excited oscillation.The American cablestayed bridges have high design dampings to estimate the behavior of a proto type.
