Abstract
The rain-wind-induced vibration (RWIV) of stay cables has become a concern in bridge engineering over the past decades. Attaching helical fillets on the surface of stay cables is often used to suppress RWIV. In the critical Reynolds number range, stay cables also experience large amplitude vibration without rainfall, which is known as dry galloping. To investigate the optimal helical fillet parameters that can suppress RWIV and dry galloping, a series of wind tunnel tests were carried out. The results showed that a helical fillet can weaken the Reynolds number effect of the cable in the critical region, and the maximum CL and the decline value of CD are decreased. This effect gradually decreases with the decrease of helical fillet pitch, resulting in the decrease of the maximum CL in the critical region and the increase of CD in the supercritical region. The helical fillet has a good suppression effect on the dry galloping equilibrium position, and the suppression effect of the helical fillet on the dry galloping amplitude depends on the helical fillet parameters. A proper helical fillet setting can effectively suppress both RWIV and dry galloping. Compared with the helical fillet diameter, the suppression effect is more effective when changing its pitch. Finally, the drag coefficients in various Reynolds number regions are summarized to provide a reference for engineering design.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Similar Papers
More From: Journal of Wind Engineering & Industrial Aerodynamics
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.