Study of the time-dependent clear water scour around circular bridge piers

Title:

Study of the time-dependent clear water scour around circular bridge piers

Creator:

Aksoy, Aysegul Ozgenc, Bombar, Gokcen, Arkis, Tanıl, and Guney, Mehmet Sukru

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:0b0bc700-0f33-4a06-b3af-60d079505b40
uuid:0b0bc700-0f33-4a06-b3af-60d079505b40
doi:10.1515/johh-2016-0048

Subject:

bridge pier, clear-water scour, local scour, steady flow, and temporal evolution

Type:

article, model:article, and TEXT

Description:

The local scour around bridge piers influences their stabilities and plays a key role in the bridge failures. The estimation of the maximum possible scour depth around bridge piers is an important step in the design of the bridge pier foundations. In this study, the temporal evolution of local scour depths as well as the equilibrium scour depths were analyzed. The experiments were carried out in a rectangular flume by using uniform sediment with median diameter of 3.5 mm and geometric standard deviation of 1.4. The diameters of the tested circular bridge piers were 40 mm, 80 mm, 150 mm and 200 mm. The flow and scour depths were determined by ultrasonic sensors. The experiments were realized in clear water conditions with various constant flow rates. The experimental findings were compared with those calculated from some empirical equations existing in the literature. A new empirical relation involving the flow intensity, the relative water depth and the dimensionless time is also introduced. The advantage of this proposed relation is that the only parameter requiring the calculation is the critical velocity, other parameters being known geometric and hydraulic parameters. The performance of this relation was tested by using experimental data available in the literature, and a satisfactory compatibility was revealed between the experimental and numerical results.

Language:

Slovak

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Source:

Journal of hydrology and hydromechanics | 2017 Volume:65 | Number:1

Harvested from:

CDK

Metadata only:

false