A New Method to Reduce Rain–Wind-Induced Vibration in Cable Sleeve of Cable-Stayed Bridges and Modeling in a Wind Tunnel

Rain–wind-induced vibration in cable of cable-stayed bridges is currently a global concern. Since many parameters are effective in this phenomenon, it is difficult to repeat this phenomenon in the laboratory and its mechanism has not yet been well explained. In this paper, the phenomenon of rain–wind-induced vibration in cable of cable-stayed bridge model is studied by creating an artificial rain flow in a wind tunnel. The effect of the main factors of this phenomenon, yaw angle, on the vibration characteristics due to wind and rain for a simple cable has been studied in detail in the experiment. Reciprocal measures to reduce rain–wind-induced vibration by creating a spiral grooves on the cable have been studied. Then the effect of different grooves on rain–wind-induced vibration was tested. The results show that the presence of grooves on the cable reduces the rain–wind-induced vibration. When using these grooves in cables, care should be taken with the grooves distance, because in the average wind speed by increasing the yaw angle, the cable with a longer-distance grooves has less vibration than the cable with a short-distance grooves. With increasing wind speed, this vibration increases.