Experimental and numerical verification of vortex-induced vibration of hangers on the footbridge

0383999 - ÚTAM 2013 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Urushadze, Shota - Pirner, Miroš - Pospíšil, Stanislav - Král, Radomil
Experimental and numerical verification of vortex-induced vibration of hangers on the footbridge.
Engineering Mechanics 2012. Prague: ITAM AS CR, v. v. i., 2012 - (Náprstek, J.; Fischer, C.), s. 1457-1464. ISBN 978-80-86246-39-0.
[Engineering mechanics 2012 - International conference /18./. Svratka (CZ), 14.05.2012-17.05.2012]
Grant CEP: GA ČR(CZ) GA103/09/0094; GA ČR(CZ) GAP105/10/2159; GA MPO(CZ) FR-TI3/654
Institucionální podpora: RVO:68378297
Klíčová slova: footbridge * vortex-induced oscillations * Kármán vortex * fluid dynamics
Kód oboru RIV: JM - Inženýrské stavitelství

The paper deals with vortex-induced oscillations of footbridge hangers at a very low wind speed. The two-spans (2x50m) reinforced concrete structure with the central pylon (25m height) is designed as the harp system of hangers with circular cross-section. The oscillations were observed at the low wind speed and the high double amplitudes has been measured. The wind-excited deformation shape corresponded to the 6th, 7th and 8th natural modes of a hanger. The individual hanger as well as thein group were analysed to estimate the dynamic response, possible aeroelastic vibration and special interference or coupling effects. It also includes proposal for the elimination of the extensive vibration. The analysis is complemented by numerical investigation using Computational Fluid Dynamics methods.
Trvalý link: http://hdl.handle.net/11104/0213769