Staff Members - Benha University
Experimental and numerical simulation of scour at bridge abutment provided with different arrangements of collars
Alexandria Engineering Journal • 2016
Publication Information
Authors
T. Hemdan Nasr-Allah , Yasser Abdallah Mohamed Moussa ,*,G. Mohamed Abdel-Aal , A. Shawky Awad
Keywords
Numerical models;
Collar;
Bridge abutments;
Local scour;
SSIIM
Journal
Alexandria Engineering Journal
Publisher
Not Available
Volume
55
Issue
55
Pages
1455–1463
publication.type
Local
Paper Link
Open Link
Supplementary Materials
Not Available
Abstract
In this paper, the effects of different widths and lengths of collar around bridge abutment
on local scour depth are studied numerically and experimentally. Numerical simulation of scour
hole evolution at bridge abutment is more convenient than the experimental modeling, because
the computational cost and time have significantly decreased. The numerical model solves 3-D
Navier–Stokes equations and bed load conservation equation. The k–e turbulence model is used
to solve the Reynolds-stress term. The simulated results are verified using the laboratory experiments.
In addition, the multiple linear regressions are applied to correlate the maximum local scour
depth with the other independent parameters. It was found that the relative length of collar 0.73
around bridge abutment reduces the maximum scour depth by 69% compared to no-collar case.
Moreover, the results of 3-D numerical model and regression models agree well with the experimental
data.
on local scour depth are studied numerically and experimentally. Numerical simulation of scour
hole evolution at bridge abutment is more convenient than the experimental modeling, because
the computational cost and time have significantly decreased. The numerical model solves 3-D
Navier–Stokes equations and bed load conservation equation. The k–e turbulence model is used
to solve the Reynolds-stress term. The simulated results are verified using the laboratory experiments.
In addition, the multiple linear regressions are applied to correlate the maximum local scour
depth with the other independent parameters. It was found that the relative length of collar 0.73
around bridge abutment reduces the maximum scour depth by 69% compared to no-collar case.
Moreover, the results of 3-D numerical model and regression models agree well with the experimental
data.