2001 Volume 21 Issue 1Supplement Pages 279-282
Rain-wind induced cable vibration is one of serious problem on design of cable-stayed bridges. This vibration usually occurs at particular high reduced wind velocity regions under raining condition. The generation mechanism of this vibration is rather complicated since the cable's attitude against wind is inclined, and then there are strong three-dimensional fluids characteristics around the inclined cable. Also, a water rivulet is formed on the cable surface. To understand this phenomenon, the flow field around an inclined cable was investigated by wind tunnel tests. Flow visualization tests around inclined cable model and a series of wind tunnel tests measuring its unsteady aerodynamic force and the unsteady wind fluctuation at its wake were conducted. Then, it becomes clear that there are three-dimensional interactions related to Karman vortex and the effects of water rivulet, and the wind turbulence may be significant factors of this vibration.
