During production, transportation, installation and operation, stay cables may surfer scratches and cracks.Studying wind-induced vibration characteristics of stay cables under surface damage is of great significance for accurately evaluating the aerodynamic stability of stay cables during their service life.Through wind tunnel tests of a smooth model and other models with 2 sizes of dent, the influences on wind-induced vibration characteristics of Reynolds number, wind direction and the size of dents were studied.And the vibration state was initially judged.Results show that the vibration characteristics with Reynolds number curve of the dent cable model is similar to that of the smooth model, but the maximum amplitudes of the dent cable model are larger than that of the smooth model in the worst wind directions.At the same wind direction, there are lower starting Reynolds number and wider Reynolds number interval of wind-induced vibration of dent models.Also, the size of dent influences wind-induced vibration characteristics prominently during test Reynolds number range, not a simple monotonous relation, but related to wind direction closely.This wind-induced vibration is initially judged to be galloping, not vortex-induced vibration, based on vibration frequency and Den Hartog criterion.
Key words
stay cables /
surface-damaged /
Reynolds number /
wind direction /
wind-induced vibration
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