Component Level–Based Assessment of the Solitary Wave Forces on a Typical Coastal Bridge Deck and the Countermeasure of Air Venting Holes
Publication: Practice Periodical on Structural Design and Construction
Volume 21, Issue 4
Abstract
In this paper, the solitary wave forces on a typical coastal bridge deck are evaluated numerically based on a component level assessment, and the countermeasure of the air venting holes is investigated. At first, a wave model based on the second-order solitary wave theory is presented to represent the incident waves in tsunami events. The shear stress transport (SST) k-ω model is used as the turbulence closure for the Reynolds-averaged Navier-Stokes (RANS) equations. Then, the characteristics of the wave forces (the horizontal force, the vertical force, and the moment) considering three different still-water levels (SWLs) and four wave heights for each SWL are investigated, and the effects of the SWLs and wave heights are demonstrated. In addition, a component level–based assessment of the wave loadings, especially the overturning moment, varying along the wave propagation is conducted to enhance the understanding of the force distribution on the bridge deck. Finally, the countermeasure of the air venting holes with different venting ratios is studied. It is proven that this countermeasure is beneficial in reducing the positive vertical (uplift) force dramatically, but it results in a corresponding increase of the horizontal force. It is hoped that this study will facilitate practicing engineers with an in-depth understanding of the wave force variation in the bridge deck–wave interaction process and shed light on the consideration of adopting this countermeasure in future engineering practices.
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Acknowledgments
This work is supported by Louisiana State University under the Economic Development Assistantship for the first author and National Science Foundation (NSF) Grant CMMI-0927824. The work is also partially supported by HPC@LSU high-performance computing resources. All the opinions presented here are those of the writers and do not necessarily represent those of the sponsors.
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Information & Authors
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Published In
Practice Periodical on Structural Design and Construction
Volume 21 • Issue 4 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Sep 15, 2015
Accepted: Feb 2, 2016
Published online: Mar 18, 2016
Discussion open until: Aug 18, 2016
Published in print: Nov 1, 2016
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