The Behavior of Scouring Around Multiple Bridge Piers Having Different Shapes

Abed, Basim Sh.; Majeed, Hayder Q.

doi:10.1088/1757-899x/745/1/012158

Cited by 5 publications

(4 citation statements)

References 11 publications

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“…The condition of the piers in the flow of the river in its planning always pays attention to the strength and security of the dimensions. A recent study conducted by Abed &Majeed (2020 andMaritz1 et al (2023), showed that the grinding of rectangular piers with pier-shaped ends was larger than the circular, where the smallest scouring occurred at the ends of triangles.…”

Section: Introductionmentioning

confidence: 99%

Study of Pillar Dimension Variations Modelling on River Geomorphology

Muhardiono

2023

jpensil

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The behavior of river flow patterns on the condition of the pillar dimensions can affect the geomorphology conditions of the river, namely the unbalanced local scouring between sediment transport and sediment supply so that it will affect the strength of the pillar. This study aims to study the effect of pillar dimensions on scour depth and channel base changes in the pillar area. The method of observation was carried out by simulations using Nays2DH with the same parameters for each test of each dimension with discharge (Q) = 0.5 m3/s, sediment diameter (D50) = 0.35 mm, channel width (B) = 5 m, channel length (L) = 25 m, slope (i) = 0.005 and drainage time (t) = 7200 s. The simulation results show the basic scour pattern of the channel which has the smallest value, the diamond type pillar. Degradation - Basic channel agitation on diamond type pillars, showing a pattern that tends to be evenly distributed compared to semi rounded, rectangle, or octagonal types. Period (t) 7200 s downstream of the pillar, semi rounded type scours change <0.3 m, rectangle type scours changes <0.4 m, octagonal type scours changes <0.4 m, and diamond type scours changes <0.2 m. So the dimensions of the diamond type are more effective in reducing the depth of scour.

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Section: Introductionmentioning

confidence: 99%

Study of Pillar Dimension Variations Modelling on River Geomorphology

Muhardiono

2023

jpensil

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“…Numerous researchers have conducted parametric studies [4,5] to identify the variables influencing scour depth. This study has enhanced the understanding of flow behavior around the bridge pier in different soil beds, flow depth, and flow velocity.…”

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confidence: 99%

“…The local scour depth is a function of various flow characteristics, bed material properties, and pier dimensions [6]. Many researchers have carried out experimental study to find out efficient pier geometry, effect of pier characteristics, flow characteristics, bed characteristics and parameters affecting the scour depth [7][8][9][10][11][12]20]. In spite of extensive study, designers find it difficult to identify reliable scour depth estimation methodology.…”

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confidence: 99%

“…They found that scour depth is depending on many parameters and exactly proportional to the approach flow velocity. Also, lots of efforts in terms of experimental [13,17,22,23,25], analytical [21] and numerical [14][15]20,24] were made towards development of scour depth formula. They found that current scour prediction methods are not suitable as they do not consider the complex nature of the scour formation mechanism.…”

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Experimental, Analytical, and Numerical Evaluation of Bridge Pier Scouring

Kadam,

Dawari

2024

Civil and Environmental Engineering

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Due to the rising number of incidents of bridge failure, scouring around bridges has received a lot of attention. Accurate scour depth prediction is a challenge for researchers and experts, despite massive global research efforts. Estimation the scour depth is crucial for both a safety and economy. Numerous factors affect the scour depth. In this work, the scour depth of three distinct pier geometries – circular, oblong, and rectangular – is thoroughly investigated, and the effect of water depth and discharge on the scour depth of a given geometry is evaluated. Three pier shapes were the subject of a total of 27 trials, nine of which combined three discharges with varying flume water depth. Experimental observation of scour depth shows good agreement with analytical and numerical scour depth values. A comparative examination of analytical, experimental, and numerical findings indicates that numerical models can effectively estimate scour depth, offering a cost-effective and time-saving methodology. Results showed that circular and oblong pier geometry shows lesser scour depth than rectangular pier geometry for a specific combination of flow depth and discharge. Scour depth decreased with increasing flume water depth for the same discharge. For the constant flume water depth, higher discharge results in greater scour depth.

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Model experiments on hydraulic properties around multiple piers with reproduced 3D geometries

Sato

2022

Sci Rep

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The effects of multiple piers with 3D geometries on water levels during floods, as well as riverbed fluctuations and local scour after floods were examined via hydraulic model experiments. The Kintaikyo Bridge in Japan, a world-famous historical triple-wooden-arch bridge, was modeled at a scale of approximately 1/276. The number of model piers was set to four, as in the real bridge, and they were 3D printed and installed in the sand layer of an open channel. To provide adequate information on the pier installation conditions and hydraulic response, four cases were studied in the experiments, primarily considering present pier conditions; the previous conditions of the Kintaikyo Bridge were also considered. The experimental conditions in these four cases depended on whether foundations were present, the piers were skewed against the flow center, and the shape was spindle or similar to that of the present case. In the current bridge condition where foundations are present and there is no skew, water level rise, riverbed fluctuation, and local scour were suppressed. Furthermore, the statistical analysis of the results suggested that riverbed fluctuations are more stable after flooding. The two piers with foundations had smaller scour areas than those without. Further, those with foundations generally had lower mean scour at the pier perimeters. Regarding those without foundations, there were no differences in riverbed fluctuations or local scour due to the skewed pier angle. In addition, the representative length of the pier with a 3D geometry was determined by dividing the projected area of the pier below the initial sand surface in the main flow direction by the pier height, and the relationship between the Froude number or the mean water depth and the maximum scour depth was investigated.

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The Behavior of Scouring Around Multiple Bridge Piers Having Different Shapes

Cited by 5 publications

References 11 publications

Study of Pillar Dimension Variations Modelling on River Geomorphology

Study of Pillar Dimension Variations Modelling on River Geomorphology

Experimental, Analytical, and Numerical Evaluation of Bridge Pier Scouring

Model experiments on hydraulic properties around multiple piers with reproduced 3D geometries

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