[en] This paper studies the contribution of the bistable flow activity on the installation of incipient conditions to provoke divergent stayed-cable movement. The experiment consists of performing dynamic tests on a long (6.1 m) and genuine inclined and smooth-surfaced cable in a wind tunnel. The cable has an outer diameter of 0.219 m and is equipped with 128 pressure taps distributed on seven (7) rings. The range of the Reynolds numbers is covering the critical flow regime around a circular cylinder. The evolution of mean and instantaneous aerodynamic coefficients is discussed and Proper Orthogonal Modes of the pressure pattern are created. The results indicate that both transitory regimes in the critical flow regime could contribute to install cable instability incipient conditions. Seemingly, only the unsteady states in the critical flow regime appear to participate on imposing large cable displacement. The influence of the circularity defect on disturbing flow fields around the circular cylinder has also been confirmed. Furthermore, the bistable flow activity has been clearly identified to contribute strongly in the installation of large-amplitude wind-induced vibrations.
Acampora, A., Macdonald, J.H.G., Georgakis, C.T., Nikitas, N., Identification of aeroelastic forces and static drag coefficients of a twin cable bridge stay from full-scale ambient vibration measurements. J. Wind Eng. Ind. Aerod. 124 (2014), 90–98.
Benidir, A., Flamand, O., Gaillet, L., Dimitriadis, G., Impact of roughness and circularity defect on bridge cables stability. J. Wind Eng. Ind. Aerod. 137 (2015), 1–13.
Benidir, A., Flamand, O., Dimitriadis, G., On the aerodynamic characteristics of inclined stay cable sheaths in the critical flow regime. J. Fluid Struct., 99, 2020, 103147.
Benidir, A., Flamand, O., Dimitriadis, G., Delpech, P., Aerodynamic instability of circular slender structures due to bistable flow activity. Struct. Eng. Int., 2021, 10.1080/10168664.2021.1929670.
Cheng, S., Larose, G.L., Savage, M.G., Tanaka, H., Irwin, P.A., Experimental study on the wind-induced vibration of a dry inclined cable-Part I: Phenomena. J. Wind Eng. Ind. Aerod. 96:12 (2008), 2231–2253.
Cheng, S., Irwin, P.A., Tanaka, H., Experimental study on the wind-induced vibration of a dry inclined cable-Part II: proposed mechanisms. J. Wind Eng. Ind. Aerod. 96:12 (2008), 2254–2272.
Demartino, C., Ricciardelli, F., Assessment of the structural damping required to prevent galloping of dry HDPE stay cables using the quasi-steady approach. J. Bridge Eng., 23(4), 2018, 04018004 2018.
Duy, H.-V., Katsuchi, H., Yamada, H., Nishio, M., Experimental study on dry-state galloping with various wind relative angles and its countermeasures. J. Struct. Eng., 60A, 2014 March 2014.
ESDU 80025. Mean Forces, Pressures and Flow Field Velocities for Circular Cylindrical Structures: Single Cylinder with Two-Dimensional Flow.
Honda, A., Yamanaka, T., Fujiwara, T., Saito, T., Wind tunnel test on rain-induced vibration of the stay cable. Proceedings of the International Symposium on Cable Dynamics, 1995, Liège, Belgium, 255–262.
Irwin, P., Wind vibrations of cables on cable-stayed bridges. Struct. Cong., 1997, 383–387.
Jakobsen, J.B., Andersen, T.L., Macdonald, J.H.G., Nikitas, N., Larose, G.L., Savage, M.G., McAuliffe, B.R., Wind-induced response and excitation characteristics of an inclined cable model in the critical Reynolds number range. J. Wind Eng. Ind. Aerod. 110 (2012), 100–112.
Kumarasena, S., Jones, N.P., Irwin, P., Taylor, P., Wind-Induced Vibration of Stay Cables. Report No. FHWA-RD-05-083, the Federal Highway Administration., 2007, U.S. Department of Transportation.
Larose, G.L., Zan, S.J., The aerodynamic forces on stay cables of cable-stayed bridges in the critical Reynolds number range. Proceedings of the 4th International Symposium on Cable Dynamics, 2001, 77–84 May 28–30, Montreal, Canada.
Lin, Y.J., Miau, J.J., Tu, J.K., Tsai, H.W., Nonstationary, three-dimensional aspects of flow around circular cylinder at critical Reynolds numbers. Am. Inst. Aeronaut. Astronaut. J., 49(9), 2011.
Ma, W., Liu, Q., Matsumoto, M., Excitation of the large-amplitude vibrations of a circular cylinder under normal wind conditions in the critical Reynolds number range. J. Fluid Struct. 84 (2019), 318–328.
Macdonald, J.H.G., Larose, G., A unified approach to aerodynamic damping and drag/lift instabilities, and its application to dry inclined cable galloping. J. Fluid Struct. 22:2 (2006), 229–252.
Matsumoto, M., Yagi, T., Shigemura, Y., Tsushima, D., Vortex-induced cable vibration of cable-stayed bridges at high reduced wind velocity. J. Wind Eng. Ind. Aerod. 89:7–8 (2001), 633–647.
Matsumoto, M., Yagi, T., Hatsuda, H., Shima, T., Tanaka, M., Naito, H., Dry galloping characteristics and its mechanism of inclined/yawed cables. J. Wind Eng. Ind. Aerod. 98:6–7 (2010), 317–327.
Matsumoto, M., Ishizaki, H., Tanaka, T., Rain and wind induced vibration and dry galloping of stay cables - its mechanism and aerodynamic stabilization. Proc. Of the International Symposium on the Dynamics and Aerodynamics of Cables (ISDAC 2017), Porto, Portugal, October 30-31, 2017, 13–37.
Matteoni, G., Georgakis, C.T., Effects of bridge cable surface roughness and cross-sectional distortion. J. Wind Eng. Ind. Aerod., 2012, 176–187 104–106.
McTavish, S., Raeesi, A., D'Auteuil, A., Yamauchi, K., Sato, H., An investigation of the mechanisms causing large-amplitude wind-induced vibrations in stay cables using unsteady surface pressure measurements. J. Wind Eng. Ind. Aerod. 183 (2018), 19–34.
Nikitas, N., Macdonald, J.H.G., Anderse, T.L., Jakobsen, J.B., Savage, M.G., McAuliffe, B.R., Wind Tunnel Testing of an Inclined Aeroelastic Cable Model-Pressure and Motion Characteristics, Part I. EACWE 5 Florence, Italy 19th – 23rd July. 2009.
Nikitas, N., Macdonald, J.H.G., Aerodynamic forcing characteristics of dry cable galloping at critical Reynolds numbers. Eur. J. Mech. B Fluid 49 (2015), 243–249.
Tanaka, T., Matsumoto, M., Ishizaki, H., Kibe, H., Stall-type galloping and its aerodynamic stabilization of stay-cables of cable-stayed bridges. Proc. Of the 8th International Colloquium on Bluff Body Aerodynamics and Applications, 2016.
Vo, H.-D., Katsuchi, H., Yamada, H., Nishio, M., A wind tunnel study on control methods for cable dry-galloping. J. Front. Struct. Civ. Eng. 10:1 (2016), 72–80.
Yamauchi, K., Uejima, H., McTavish, S., Larose, G., Effects of a helical fillet on the wind-induced response of bridge cables in dry conditions. Proc. Of the 8th International Colloquium on Bluff Body Aerodynamics and Applications, 2016.
Zdravkovich, M.M., Flow Around Circular Cylinder - Volume 1: Fundamentals. 1997, Oxford University Press.
Zuo, D., Jones, N.P., Interpretation of field observations of wind and rain–wind induced stay cable vibrations. J. Wind Eng. Ind. Aerod. 98 (2010), 73–87.