Effects of Different Geometric Parameters of Complex Bridge Piers on Maximum Scour Depth: Experimental Study

Ghodsi, Habibeh; Najafzadeh, Mohammad; Khanjani, M. J.; Beheshti, Aliasghar

doi:10.1061/(asce)ww.1943-5460.0000645

Cited by 21 publications

(4 citation statements)

References 24 publications

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“…Ghodsi [17] The geometric effect of complex bridge piers on the maximum scour depth Eighty-two laboratory tests within six physical models were adopted to study pier geometry as the affecting parameter the on maximum scour depth. A dimensional analysis was carried out, and the study results clarify that each individual parameter impacts the maximum scour depth.…”

Section: Scour Around Bridge Piersmentioning

confidence: 99%

Physical Modeling of the Scour Volume Upstream of a Slit Weir Using Uniform and Non-Uniform Mobile Beds

Hamdan

Al-Adili

Mohammad

2022

Water

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This study presents new laboratory data on the time-varying scour upstream of a slit weir used for sediment release near hydropower intake. The governing parameters in temporal and spatial scour hole development under steady and unsteady flow conditions were experimentally investigated. This study includes 40 scenarios for steady flow at center and side slit weirs for uniform and non-uniform sediment with median sizes of d50 = 0.24, 0.55 mm and four scenarios of unsteady flow conditions at a center slit weir under different flow intensities. The steel slit weirs were built in a rectangular brick and concrete flume with dimensions of 1.25 m wide, 8.0 m long and 1.0 m deep. The dimensional analysis supports recent studies. This study demonstrates an increment in the resulted scour volume for fine and uniform sands at the center slit weir of about 2 times the value of coarse sand and 1.25 times the value measured with the side slit weir for uniform and non-uniform sands. However, the resulted scour volume for fine non-uniform sand at the center slit weir was recorded as 2.5 times that of coarse sand. There was a dramatic increase in the scour volume of about 4 times at the center slit weir and 3–3.5 at the side slit weir when the flow rate increased by 4 times.

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Section: Scour Around Bridge Piersmentioning

confidence: 99%

Physical Modeling of the Scour Volume Upstream of a Slit Weir Using Uniform and Non-Uniform Mobile Beds

Hamdan

Al-Adili

Mohammad

2022

Water

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“…It has been demonstrated that the elliptical pile cap can successfully cut down on scour. On the other hand, observations made in the field have shown that the vast majority of the time, the earth is piled up to the top, and the shape of the pile cap is irrelevant to the process [18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis Approaches in Scour Depth of Bridge Piers

Abdulkathum¹,

Al-Shaikhli

Al-Abody

et al. 2023

Civ Eng J

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A local scour is the removal of bed material from around the pier of the bridge. This bed removal is considered a big problem and is of great concern for hydraulic engineers. They should find economic solutions for this problem. The exaggerated local scour around bridge piers leads to many problems for the whole bridge structure, such as stability problems that may lead to the bridge's destruction. This paper aims to verify the scour depth around different shapes of uniform bridge piers for different flow conditions than those done by previous researchers using different prediction models. Where the consistency of previous experimental investigations is verified by multiple nonlinear regression analysis (MNLR), Gene Expression Programming (GEP) and Artificial Neural Network (ANN) models. In the comparison of values that were measured and predicted by the four models (CFD, MNLR, ANN, and Gene), it is seen that the ANN model has the ability to predict the Ys/b values higher than other models used in relation to the measured values. This makes the ANN model superior in predicting the Ys/b value over the other used models, followed by the Gene model. In comparison, the values of the R2and RMSE for the four models that were used in this study, for the Ys/b model using the ANN had a value of 0.9978 and 0.0147, respectively, while those for the Ys/b model using the Gene model were 0.9800 and 0.0375, respectively. Doi: 10.28991/CEJ-2023-09-01-011 Full Text: PDF

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“…Another example of scour at complex structures under the influence of currents are complex bridge piers. As an example Ghodsi et al (2021) experimentally investigated local scour depth around complex bridge piers in clear-water conditions in eighty-two experiments using six model types. However, the number of studies with a hexagonal cylinder arrangement is rather limited, as presented in the following.…”

Section: Introductionmentioning

confidence: 99%

Spatio-Temporal Analysis of Scour Around Complex Offshore Foundations Under Clear Water and Live Bed Conditions

Welzel,

Schendel,

Satari

et al. 2023

Preprint

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Effects of Different Geometric Parameters of Complex Bridge Piers on Maximum Scour Depth: Experimental Study

Cited by 21 publications

References 24 publications

Physical Modeling of the Scour Volume Upstream of a Slit Weir Using Uniform and Non-Uniform Mobile Beds

Physical Modeling of the Scour Volume Upstream of a Slit Weir Using Uniform and Non-Uniform Mobile Beds

Statistical Analysis Approaches in Scour Depth of Bridge Piers

Spatio-Temporal Analysis of Scour Around Complex Offshore Foundations Under Clear Water and Live Bed Conditions

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