Abstract
It is well known that a bluff body cross-section exhibits various kinds of aeroelastic instabilities such as vortex induced vibration, galloping and torsional flutter. Since these cross-sections are used in a long span bridge and tall building, it is important to predict their occurrence in wind resistant structural design. In this paper, the authors made a series of comparisons of unsteady wind forces, unsteady pressure distributions and free vibration responses between the previously conducted studies and the unsteady two-dimensional unsteady κ−ε model for rectangular cross-sections with cross sectional ratio of 2 and 4 in a smooth uniform flow in order to verify computational predictability of aeroelastic instabilities. As a result, the computation could successfully predict the onset velocity and response of these aeroelastic instabilities.
