Temporal evolution of clear-water local scour at bridge piers with flow-dependent debris accumulations
Temporal evolution of clear-water local scour at bridge piers with flow-dependent debris accumulations
Previous research has shown that local scour at bridge piers is severely increased by the accumulation of woody debris around piers. However, due to the unavailability of accurate information regarding the characteristics of formed debris jams, the shape and dimensions of accumulations tested in previous laboratory experiments had to be assumed. This article provides an assessment of debris-induced scour based on recently available knowledge about the relation between the potential dimensions of debris accumulations, the characteristics of flow and debris elements. Clear-water scour experiments (with and without debris accumulation) were conducted using debris models with shape and size that correspond to the particular flow characteristics of each experiment. The results showed that scour depths obtained with flow-dependent debris accumulations were larger than without accumulations by a factor ranging from 1.18-2.19. The analysis of the scour depths affected by the accumulations suggested similarity characteristics as well as dependence on the flow intensity, blockage area ratio and depth ratio.
Cantero-Chinchilla, Francisco Nicolas
77948026-41fa-4491-86c5-6374772a419b
De Almeida, Gustavo
f6edffc1-7bb3-443f-8829-e471b6514a7e
Manes, Costantino
34413e4c-d90a-46ae-9c94-711c10e3a555
20 July 2021
Cantero-Chinchilla, Francisco Nicolas
77948026-41fa-4491-86c5-6374772a419b
De Almeida, Gustavo
f6edffc1-7bb3-443f-8829-e471b6514a7e
Manes, Costantino
34413e4c-d90a-46ae-9c94-711c10e3a555
Cantero-Chinchilla, Francisco Nicolas, De Almeida, Gustavo and Manes, Costantino
(2021)
Temporal evolution of clear-water local scour at bridge piers with flow-dependent debris accumulations.
Journal of Hydraulic Engineering.
(doi:10.1061/(ASCE)HY.1943-7900.0001920).
Abstract
Previous research has shown that local scour at bridge piers is severely increased by the accumulation of woody debris around piers. However, due to the unavailability of accurate information regarding the characteristics of formed debris jams, the shape and dimensions of accumulations tested in previous laboratory experiments had to be assumed. This article provides an assessment of debris-induced scour based on recently available knowledge about the relation between the potential dimensions of debris accumulations, the characteristics of flow and debris elements. Clear-water scour experiments (with and without debris accumulation) were conducted using debris models with shape and size that correspond to the particular flow characteristics of each experiment. The results showed that scour depths obtained with flow-dependent debris accumulations were larger than without accumulations by a factor ranging from 1.18-2.19. The analysis of the scour depths affected by the accumulations suggested similarity characteristics as well as dependence on the flow intensity, blockage area ratio and depth ratio.
Text
HYENG-12426_R3_v2
- Accepted Manuscript
More information
Accepted/In Press date: 27 April 2021
Published date: 20 July 2021
Identifiers
Local EPrints ID: 448807
URI: http://eprints.soton.ac.uk/id/eprint/448807
ISSN: 0733-9429
PURE UUID: 17db09dd-2ccd-4aaa-8274-3ab2100d2f0c
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Date deposited: 06 May 2021 16:31
Last modified: 17 Mar 2024 03:34
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Author:
Francisco Nicolas Cantero-Chinchilla
Author:
Costantino Manes
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