Vortex induced response of bridge cables in turbulent flow

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F19%3A00509753" target="_blank" >RIV/68378297:_____/19:00509753 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Vortex induced response of bridge cables in turbulent flow

Original language description

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.

Czech name

—

Czech description

—

Type

O - Miscellaneous

CEP classification

—

OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA19-04695S" target="_blank" >GA19-04695S: Aerodynamic response of cylinder with surface irregularities in critical and transition Reynolds number regimes</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů