Hydrodynamic Loading on River Bridges
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VIEW THE REPLYPublication: Journal of Hydraulic Engineering
Volume 129, Issue 11
Abstract
During a flood, a bridge may be partially or entirely submerged by the flow and the subsequent loading of fluid plays a major role in assessing the vulnerability of the structure. We have performed laboratory experiments to quantify the hydrodynamic loading on a bridge deck with rectangular cross section. We measured the time-varying hydrodynamic forces acting on the obstacle for various submergences and Deck Froude numbers. The experimental results have been analyzed via dimensional analysis and relationships between time-averaged force coefficients (drag, lift, and moment coefficients), the Deck Froude number and geometrical parameters of the problem are discussed and compared against relevant literature. Due to the presence of a free surface, force coefficients can be either larger (by more than a factor of 2) or lower than the corresponding values of the unbounded domain. The experimental drag coefficients are then compared with the results obtained by the momentum equation.
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Published In
Journal of Hydraulic Engineering
Volume 129 • Issue 11 • November 2003
Pages: 854 - 861
Copyright
Copyright © 2003 American Society of Civil Engineers.
History
Received: Aug 23, 2001
Accepted: Apr 9, 2003
Published online: Oct 15, 2003
Published in print: Nov 2003
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