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Computational Study on Aerodynamic Mitigation of Wind-Induced, Large-Amplitude Vibrations of Stay Cables With Strakes

Published

Author(s)

Dong Hun Yeo, Nicholas P. Jones

Abstract

Modifications of circular cylinder surfaces, such as strakes and helical wires, effectively mitigate Kármán vortex-induced vibrations normal to flow and have been applied to the reduction of large-amplitude vibrations of stay cables in bridges, which occur under wind oblique to a cable with or without rainfall. This aerodynamic control method cannot be fully effective without un-derstanding the behavior of the flow around and the associated forces on oblique cables. To ad-dress this issue, flow around a yawed cylinder with various strake patterns was studied using three-dimensional detached eddy simulation (DES) at Reynolds number of 1.4×105. Results demonstrated that strake patterns strongly influence the development of flow structures around a yawed cylinder and therefore the associated forces on the cylinder. The results suggest that par-ticular strake patterns can mitigate large-amplitude and low-frequency vibrations of stay cables induced by oblique wind.
Citation
Journal of Wind Engineering and Industrial Aerodynamics

Keywords

cable vibration, cable-stayed bridge, yawed circular cylinder, detached eddy simulation (DES), strake effect, aerodynamic control.

Citation

, D. and Jones, N. (2011), Computational Study on Aerodynamic Mitigation of Wind-Induced, Large-Amplitude Vibrations of Stay Cables With Strakes, Journal of Wind Engineering and Industrial Aerodynamics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906868 (Accessed April 14, 2024)
Created March 1, 2011, Updated February 19, 2017