Vortex induced response of bridge cables in turbulent flow

0509753 - ÚTAM 2020 RIV CN eng C - Konferenční příspěvek (zahraniční konf.)
Trush, Arsenii - Pospíšil, Stanislav - Kuznetsov, Sergeii
Vortex induced response of bridge cables in turbulent flow.
Proceedings of the 15th International conference on wind engineering. ICWE15. Beijing: Beijing Jiaotong University, 2019, s. 241-242.
[International conference on wind engineering. ICWE15 /15./. Beijing (CN), 01.09.2019-06.09.2019]
Grant CEP: GA ČR(CZ) GA19-04695S
Institucionální podpora: RVO:68378297
Klíčová slova: vortex shedding * bridge cables * turbulence * wind tunnel experiment
Obor OECD: Civil engineering

Structural analysis related to the wind impact deals with the problems of static wind loading and dynamic excitation of structures, tall building, bridges, guyed masts, and towers. The wind causes naturally the static and/or dynamic effects on whole structure or on its parts, called substructures. The wind flow in the Atmospheric Boundary Layer is turbulent, which noticeably affects the creation of vortices and vortex shedding process. The size of the turbulent vortices and structure can be categorized as so called large- and small-scale turbulence. The main effect of small scale turbulence at the surface of the body is earlier reattachment of the flow through enhanced mixing in the shear layers. Roughness elements on the surface produce turbulence affecting bluff body boundary layer in close way as small-scale free-stream turbulence. Over the past years a large amount of researches has been devoted to research of vortex shedding in turbulent flows, see Miyata & Miyazaki, Kareem & Wu, Matteoni & Georgakis present results of vortex induced vibrations under simultaneous impact of the free stream turbulence and uniform roughness caused by emery cloth. Investigation of helical surface roughness effect at response and flow around cable-like structures was started by Votaw & Griffin, Couniah, Wadraw & Cooper etc. The peculiarity of this type of cables is that helical strands can act as suppressors of vortex shedding synchronization along the cable length, while the main parameters affecting this phenomenon are lay length and relative roughness k/D, where k is wire radius of outer layer of cable and D is cable diameter. In this experimental study were made efforts in the improvement of the methodology of the previous study, see Trush et al.
Trvalý link: http://hdl.handle.net/11104/0300385