Reduction of scour around bridge piers using a modified method for vortex reduction

El-Ghorab, Entesar Abdallh Soliman

doi:10.1016/j.aej.2013.04.001

Cited by 19 publications

(10 citation statements)

References 1 publication

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“…Therefore, it is of utmost importance to consider different types of pier shapes and determine the most suitable pier geometry in terms of reducing scour. However, researchers are unanimous in that pier geometry alone is not sufficient to protect bridge piers against local scour [11,[25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, in the present study, the collar thickness of 5 mm and width of collar equal to three times that of the pier, was kept for all the experiments. EL-Ghorab [27] proposed openings countermeasure at the upstream side of a pier. These openings, starting from the upstream face of pier, continue transversely to lateral sides and straight to the downstream side.…”

Section: Introductionmentioning

confidence: 99%

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Impact Assessment of Pier Shape and Modifications on Scouring around Bridge Pier

Farooq

Ghumman

2019

Water

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Previous experimental research on utilizing pier modifications as countermeasures against local scour has focused primarily on circular pier. It is of utmost importance to further investigate the most suitable pier shape for pier modification countermeasure separately and in combination. This experimental study aims to reduce the stagnation of the flow and vortex formation in front of the bridge pier by providing a collar, a hooked collar, a cable, and openings separately and in combination around a suitable pier shape. Therefore, six different pier shapes were utilized to find out the influence of pier shape on local scouring for a length-width ratio smaller than or equal to 3. A plain octagonal shape was shown as having more satisfactory results in reducing scour compared to other pier shapes. Furthermore, the efficiency of pier modification was then evaluated by testing different combinations of collar, hooked collar, cable, and openings within the octagonal bridge pier, which was compared to an unprotected octagonal pier without any modification. The results show that by applying such modifications, the scour depth reduced significantly. The best combination was found to be a hooked collar with cable and openings around an octagonal pier. It was revealed that the best combination reduced almost 53% of scour depth, as compared to an unprotected octagonal pier.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact Assessment of Pier Shape and Modifications on Scouring around Bridge Pier

Farooq

Ghumman

2019

Water

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“…The behavior of scoured bridges under flood conditions involves complex interactions between bridge structures, pile foundations, soils, and water. In recent years, a number of studies [4][5][6][7][8][9][10][11][12] have attempted to study the behavior of scoured bridges under flood conditions. Most of these studies have been conducted based on relatively simplified models or indirect approaches.…”

Section: Introductionmentioning

confidence: 99%

“…McConnell and Can [5] investigated the influence of scour on the strength capacity of the substructure and superstructure of the Indian River Inlet Bridge. Lin et al [6] proposed an integrated technique for analyzing bridge substructures and superstructures in an iterative fashion in order to assess the effect of scour on the bridge system performance. Ghadami et al [38] studies the role of sensors in determining the structural health of the bridges along with efficient methods for sensor data transmission.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Study of the Gap at the Base of the Bridge on the River Flow Parameters

Oyarhossein¹,

Khiali²,

Hosseinmostofi³

et al. 2019

IJSEA

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In this study, substrate surface channel and bridge piers is modeled by utilization of Ansys Fluent. Continuity and Momentum equations is solved and for the pressure-velocity linkage SIMPLE algorithm is utilized. In order to model turbulence due to relatively high Reynolds value, K-ε is being used. Effect of wall shear stress, velocity magnitude and static pressure is being investigated at different heights thorough substrate longitudinal lines. It was found that different heights of longitudinal lines won't affect static pressure, while it affects velocity magnitude and wall shear stress significantly.

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Measuring scour level based on spatial and temporal image analyses

Mohtar

Muad

Porhemmat

et al. 2020

Struct Control Health Monit

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Scour monitoring is an important measurement process to determine the soil erosion level at the pillar of bridge. Image-based approach is attractive because it allows monitoring process to be conducted continuously without halting the flow of the water during experiment. Scour images provide abundance of information from a single source of camera sensor. However, this information may appear in different features, orientation, size and brightness. Therefore, it is important to detect and recognise features that are related to scour monitoring and filtered out irrelevant features like image noises and artefacts. This paper presents implementation of image processing techniques to extract various information from scour images. Image inpainting technique is used to separate information of scour level and scale markers into two different images. A proposed gradient of marginal histogram technique is used to detect the horizontal scale line markers and scour level. Backpropagation neural network is used to recognise scale text markers and convert the measurement of the scour level from a pixel unit into a centimetre unit. Interpolation techniques are used to connect scour points and delineate the boundary indicating the level of the scour. Time series acquisition of scour images allows observation of the temporal variation of the scour levels. Results show that the proposed approach achieved higher accuracy than existence method. This approach allows the detection of the scour level for even and uneven sediments, contributing to the high accurate results at the spatial and temporal measurements, thus potentially offering continuous scour monitoring solution.

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Reduction of scour around bridge piers using a modified method for vortex reduction

Cited by 19 publications

References 1 publication

Impact Assessment of Pier Shape and Modifications on Scouring around Bridge Pier

Impact Assessment of Pier Shape and Modifications on Scouring around Bridge Pier

Numerical Study of the Gap at the Base of the Bridge on the River Flow Parameters

Measuring scour level based on spatial and temporal image analyses

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