NIST logo

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

NIST Authors in Bold

Author(s): Dong Hun Yeo; Nicholas P. Jones;
Title: Computational Study on Aerodynamic Mitigation of Wind-Induced, Large-Amplitude Vibrations of Stay Cables With Strakes
Published: March 01, 2011
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.
Research Areas: Wind Engineering
PDF version: PDF Document Click here to retrieve PDF version of paper (1MB)