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Evaluation of Sediment Gradation Effects on Clear-Water Pier Scour with Densimetric Froude Number

Cheng, Nian-Sheng / Wei, Maoxing / Lu, Yesheng / Chiew, Yee-Meng

This study evaluates sediment gradation effects on clear-water scour at bridge piers. By considering the average erosion and deposition rates in a pier-scour hole, the normalized equilibrium scour depth is theoretically shown to be a cubic function of the densimetric Froude number. Comparisons with experimental data demonstrate that the cubic law achieves its best fit when the representative particle size is taken to be $d_{84}$ . The present prediction equation, which is founded on rational theoretical principles, provides an improved approach to evaluating sediment gradation effects on clear-water scour around bridge piers apart for pure empiricism.

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Evaluation of Sediment Gradation Effects on Clear-Water Pier Scour with Densimetric Froude Number

Cheng, Nian-Sheng / Wei, Maoxing / Lu, Yesheng / Chiew, Yee-Meng

This study evaluates sediment gradation effects on clear-water scour at bridge piers. By considering the average erosion and deposition rates in a pier-scour hole, the normalized equilibrium scour depth is theoretically shown to be a cubic function of the densimetric Froude number. Comparisons with experimental data demonstrate that the cubic law achieves its best fit when the representative particle size is taken to be $d_{84}$ . The present prediction equation, which is founded on rational theoretical principles, provides an improved approach to evaluating sediment gradation effects on clear-water scour around bridge piers apart for pure empiricism.

Evaluation of Sediment Gradation Effects on Clear-Water Pier Scour with Densimetric Froude Number

Cheng, Nian-Sheng / Wei, Maoxing / Lu, Yesheng / Chiew, Yee-Meng

This study evaluates sediment gradation effects on clear-water scour at bridge piers. By considering the average erosion and deposition rates in a pier-scour hole, the normalized equilibrium scour depth is theoretically shown to be a cubic function of the densimetric Froude number. Comparisons with experimental data demonstrate that the cubic law achieves its best fit when the representative particle size is taken to be $d_{84}$ . The present prediction equation, which is founded on rational theoretical principles, provides an improved approach to evaluating sediment gradation effects on clear-water scour around bridge piers apart for pure empiricism.

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Title:

Evaluation of Sediment Gradation Effects on Clear-Water Pier Scour with Densimetric Froude Number

Contributors:

Cheng, Nian-Sheng (author) / Wei, Maoxing (author) / Lu, Yesheng (author) / Chiew, Yee-Meng (author)

Published in:

Journal of Engineering Mechanics ; 146

Publication date:

2020-09-28

ISSN:

0733-9399 , 1943-7889

DOI:

https://doi.org/10.1061/(ASCE)EM.1943-7889.0001871

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

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