Vortex shedding on bridge piers

Heron, Katherine Margaret Monica (2007) Vortex shedding on bridge piers. [USQ Project] (Unpublished)

[img]
Preview
PDF (Main Project)
Heron.pdf

Download (14Mb)
[img] Video (AVI) (Video Clip 1 - download to play)
20VShed.avi

Download (653Kb)
[img] Video (AVI) (Video Clip 2 - download to play)
43VShed_a.avi

Download (748Kb)
[img] Video (AVI) (Vidio Clip 3 - download to play)
43VShed_b.avi

Download (819Kb)
[img] Video (AVI) (Video Clip 4 - download to play)
65VShed_a.avi

Download (850Kb)
[img] Video (AVI) (Video Clip 5 - download to play)
65VShed_b.avi

Download (852Kb)
[img] Video (AVI) (Video Clip 6 - download to play)
90VShed_a.avi

Download (770Kb)
[img] Video (AVI) (Video Clip 7 - download to play)
90VShed_b.avi

Download (750Kb)

Abstract

[Abstract]: The phenomenon of vortex shedding from bridge piers has been examined. A review of current literature was conducted in order to assess bridge design principles aiding in reducing the effects of vortex shedding. Experiments were conducted at the University of Southern Queensland’s hydraulics laboratory. The velocity profile downstream of model bridge piers was measured in order to observe the changes to flow caused by a bridge pier under in finer detail.A range of model piers were used in the experimentation. The diameter and surface roughness of the models were altered. Model piers of 20mm, 43mm, 65mm and 90mm were tested. The 65mm model pier was tested with surface roughness heights of 0.03mm, 2mm and 5mm. An Acoustic Doppler Velocimeter and the associated data collection software was used to capture the velocity field downstream of the models. These velocities were used to determine the conditions favourable to the onset of vortex shedding. The recorded velocities were imported into MATLAB for processing and plotting. From the results the relationship between the Strouhal number and Reynolds number was assessed and compared with published data. The results were found to be in accordance with published results. The dimensionless Reynolds number for a body in flow was used to relate the occurrence of vortex shedding on the bridge models to actual piers. It was found that vortex shedding occurs within a wide range of Reynold’s numbers (300 to 10,000).


Statistics for USQ ePrint 3823
Statistics for this ePrint Item
Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Additional Information: Attached video clips must be downloaded to user's computer to play - they cannot be played directly from this record.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 01 Feb 2008 06:21
Last Modified: 02 Jul 2013 22:57
Uncontrolled Keywords: vortex shedding; bridges; bridge; piers
Fields of Research (FOR2008): 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
URI: http://eprints.usq.edu.au/id/eprint/3823

Actions (login required)

View Item Archive Repository Staff Only