Abstract
A new mathematical model for wind turbulence is presented herein for the analysis of motion stability of wind-excited long-span bridges. The new model has a finite mean-square value, and is capable of matching closely an arbitrary spectral density, such as the von-Kármán, Dryden or other well-known spectra in the literature. It is shown that the presence of turbulence changes the composition of the combined fluid-structural mode, and that, under favorable energy interchange conditions, it can stabilize even a single-degree-of-freedom structural motion.
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