DYNAMIC ANALYSIS OF HORIZONTALLY STAYED BRIDGES UNDER WIND LOADING

The problem of the dynamic response of a horizontally stayed bridge un der wind loading is considered. A linearized dynamic analysis is perfo rmed on the proposed system to strengthen the transverse stiffness of the bridge, which is idealized as a two-span beam supported on two int ermediate flexural springs which represent the cables used. Free and f orced motion are thoroughly discussed and a variety of results are obt ained, casting significant light on the effect of the main geometrical properties and wind duration on the eigenfrequencies as well as on th e dynamic deflection and bending moment of the bridge, as compared to the classical two-span continuous beam model.