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Bridge pier scour under pressure flow conditions

Carnacina, I, Pagliara, S and Leonardi, N (2019) Bridge pier scour under pressure flow conditions. River Research and Applications. ISSN 1535-1459

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The probability of pressurized flow conditions occurring in existing bridges is forecast to increase due to possible changes in extreme precipitation, storm surges and flooding predicted under climate change scenarios. The presence of a pressure flow is generally associated with scouring processes in proximity to the bridge. Scouring can also occur around bridge piers, possibly causing infrastructure failure. While there is a vast literature on bridge pier scour and pressure flow scour, only a few studies have investigated their combined effect. This study will provide a new overview of the main features of bridge pier scour under pressurized flow conditions, based on laboratory experiences. Special focus is placed on the analysis of the flow features under pressure and free surface conditions and to the temporal evolution of the scour. A comparison with existing literature data is also conducted. The results highlight the nonlinear nature of scour processes and the need to consider pressurized flow conditions during structural design, as the interaction between pressure flow and the bridge pier strongly influences scour features and leads to scour depths much greater than the sum of the individual scours created only by pressure flow or pier presence.

Item Type: Article
Additional Information: This is the peer reviewed version of the following article: Carnacina, I, Pagliara, S, Leonardi, N. Bridge pier scour under pressure flow conditions. River Res Applic. 2019; 1– 11. https://doi.org/10.1002/rra.3451 , which has been published in final form at http://dx.doi.org/10.1002/rra.3451. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions
Uncontrolled Keywords: 0502 Environmental Science and Management, 0907 Environmental Engineering, 0602 Ecology
Subjects: T Technology > TG Bridge engineering
Divisions: Civil Engineering (merged with Built Env 10 Aug 20)
Publisher: Wiley
Date Deposited: 05 Jun 2019 08:49
Last Modified: 04 Sep 2021 09:20
DOI or ID number: 10.1002/rra.3451
URI: https://researchonline.ljmu.ac.uk/id/eprint/10811
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