Journal of Hydraulic Structures

Journal of Hydraulic Structures

Numerical Study of Scouring pattern around Bridge pier in 180-degree bend Divergent and Convergent Using SSIIM software

Document Type : Research Paper

Authors
Fariba Niknezhad
Amin Mahmoudi
Mohammad Vaghefi
Marziyeh Zangeneh
Seyed Hamed Meraji
Department of Civil Engineering, Faculty of Engineering, Persian Gulf University, Bushehr, Iran.
10.22055/jhs.2023.43705.1252
Abstract
Bridges are the most important river structures that are destroyed due to erosion. The change in the shape of the river geometry along the course of the river leads to erosion of the river bed and can also affect scour around the pier. Therefore, in this paper, the effect of the convergence and divergence ratio of 15% in the 180º bend was investigated on the amount of scour around the pier of the circular bridge using the SSIIM numerical model. The results showed that the SSIIM software has a high ability and accuracy in determining the scour pattern in bend channels. The most scour depth appeared in the bend with 15% convergence and it increased by 1.75 and 2.33 times compared to the uniform and divergent bend, respectively. Also, the most sedimentation height occurred in the bend with 15% convergence and it increased by 3.25 and 4.33 times compared to the uniform and divergent bend, respectively.
Keywords
Scour Pattern
Bed Topography
Bridge Pier
Convergence
Divergence
Subjects
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