Hybrid Modeling for Design of a Novel Bridge Pier Collar for Reducing Scour
Publication: Journal of Hydraulic Engineering
Volume 147, Issue 5
Abstract
Bridge pier scour poses major concerns for public safety and riverine communities because of its ability to undermine pier foundations. A new collar design is introduced as an improvement on the existing Flat Plate Collar (FPC). Uniquely, the three-dimensional collar is specifically designed to contain the horseshoe vortex and guide it safely downstream, while protecting the riverbed around the pier base from the passing accelerated flow. Large shear stresses are thereby prevented from contacting the riverbed, and thus scour is considerably reduced. The collar design was achieved in an iterative hybrid manner through the use of OpenFOAM (CFD) software and by employing experimental tests. Collar designs were tested numerically and adjusted until an improved shape was reached. Then, a physical model of the new collar and an FPC were constructed and tested experimentally. The collar is demonstrated to reduce scour, more than that of an FPC; however further revisions are required for it to be an effective scour solution.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors acknowledge the financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) in the form of Discovery Grants to Ioan Nistor and Colin Rennie, and the Alexander Graham Bell Canada Graduate Doctoral Scholarship (CGS D) to Christopher Valela. The authors also acknowledge A. Brévot and Q. Giraud, research interns from the University of Grenoble, France, for their assistance with the experimental work.
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Published In
Journal of Hydraulic Engineering
Volume 147 • Issue 5 • May 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Nov 1, 2019
Accepted: Nov 16, 2020
Published online: Feb 26, 2021
Published in print: May 1, 2021
Discussion open until: Jul 26, 2021
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