Experimental Investigation of a New Cables in Cable Stayed Bridges to Reduce Rain-Wind Induced Vibration

Document Type : Research Article


1 Department of Civil Engineering, Faculty of Civil and Earth Resources Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran

2 Department of Mechanical Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran


In this present, two pairs of cable models were designed and tested to reproduce the induced vibration of stay cables in a wind tunnel. Cable of cable-stat stayed bridges are flexible structural members that have very low natural frequency and low intrinsic attenuation, Therefore, they are able to various vibrations such as wind vibration, wind-rain-induced vibration (RWIV), and earthquakes. Wind-rain-induced vibration has become one of the major concerns of bridge engineering. One of the ways to reduce the effects of wind and rain on cable bridges has been examined is cable aerodynamic specification and also one of the factors affecting the aerodynamics of the cable is the formation of rainwater flow on the surface of the cable. Therefore, spiral grooves were installed on the surface of the cable to direct this flow of water to the bottom of the cable. By testing two cable models (without grooves and with grooves) in the wind tunnel with artificial rain flow, the effect of different wind speeds, and also different yaw angles, it was concluded that by creating spiral grooves to The cable circumference can reduce the induced vibration caused by wind and rain, and the presence of these spiral grooves around the cable eliminates low-frequency currents and thus reduces the amplitude of the induced vibration.


Main Subjects

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