Experimental Investigation of Asymmetrical Collar Performance on Local Scour Reduction Around Circular Bridge Pier

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RAEISI N.; GHOMESHI M.

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Journal Paper

Paper Information

Journal: WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE) Year:2021 | Volume:31 | Issue:2 Page(s): 117-132

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Information Journal Paper

Title

Experimental Investigation of Asymmetrical Collar Performance on Local Scour Reduction Around Circular Bridge Pier

Author(s)

RAEISI N. | GHOMESHI M. | Issue Writer Certificate

Keywords

EllipticallyQ2

Local scourQ1

PierQ1

Rough areaQ1

Unsymmetrical collarQ1

Abstract

Researches show that one of the most effective factors on bridges destruction is bridge Piers scour. One of the methods used to reduce scour around bridge Piers is installing collar. The collars protect the river bed against vortex flow in the vicinity of the Piers. The role of collar as a control structure of bridge Pier scour was investigated along with the effect of its shape. Experiments showed that the dimensions of the collar have a significant effect on its performance. The results showed that its performance improves with increasing the dimensions of the collar. By comparing the two types of collars, it was found that collars with (3×6) D elliptical dimensions have better performance in reducing scour than collar with (3×4) D dimensions. Larger collars performed better because they prevented the movement of sediments due to vortex activity at collar downstream. On the other hand, with the reduction of roughness in collar surfaces from 40% to 15%, the amount of scour reduction increases from 39% to 58% compared to the base without collar.

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APA: Copy

RAEISI, N., & GHOMESHI, M.. (2021). Experimental Investigation of Asymmetrical Collar Performance on Local Scour Reduction Around Circular Bridge Pier. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), 31(2 ), 117-132. SID. https://sid.ir/paper/411282/en

Vancouver: Copy

RAEISI N., GHOMESHI M.. Experimental Investigation of Asymmetrical Collar Performance on Local Scour Reduction Around Circular Bridge Pier. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE)[Internet]. 2021;31(2 ):117-132. Available from: https://sid.ir/paper/411282/en

IEEE: Copy

N. RAEISI, and M. GHOMESHI, “Experimental Investigation of Asymmetrical Collar Performance on Local Scour Reduction Around Circular Bridge Pier,” WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), vol. 31, no. 2 , pp. 117–132, 2021, [Online]. Available: https://sid.ir/paper/411282/en

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