Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour Reduction
This study investigates the performance nose-angle piers as countermeasures for local scour reduction around piers. Four nose angles were studied, i.e., 90°, 70°, 60° and 45° and tested in a laboratory. The sediment size was fixed at 0.39 mm whereas the flow angle of attack (or skew angle) was varie...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Riga Technical University Press
2018-06-01
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| Series: | The Baltic Journal of Road and Bridge Engineering |
| Subjects: | |
| Online Access: | https://bjrbe-journals.rtu.lv/article/view/2188 |
| _version_ | 1826909459447808000 |
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| author | Ibtesam Abudallah Habib Wan Hanna Melini Wan Mohtar Atef Elsaiad Ahmed El-Shafie |
| author_facet | Ibtesam Abudallah Habib Wan Hanna Melini Wan Mohtar Atef Elsaiad Ahmed El-Shafie |
| author_sort | Ibtesam Abudallah Habib |
| collection | DOAJ |
| description | This study investigates the performance nose-angle piers as countermeasures for local scour reduction around piers. Four nose angles were studied, i.e., 90°, 70°, 60° and 45° and tested in a laboratory. The sediment size was fixed at 0.39 mm whereas the flow angle of attack (or skew angle) was varied at four angles, i.e., skew angles, i.e., 0°, 10°, 20° and 30°. Scour reduction was clear when decreasing nose angles and reached maximum when the nose angle is 45°. Increasing the flow velocity and skew angle was subsequently increasing the scour profile, both in vertical and transversal directions. However, the efficiency of nose angle piers was only high at low Froude number less than 0.40 where higher Froude number gives minimal changes in the maximum scour depth reduction. At a higher skew angle, although showed promising maximum scour depth reduction, the increasing pier projected width resulted in the increase of transversal lengths. |
| first_indexed | 2024-12-18T07:35:25Z |
| format | Article |
| id | doaj.art-da72fc61efeb4b5a9e68eff3f24056ad |
| institution | Directory Open Access Journal |
| issn | 1822-427X 1822-4288 |
| language | English |
| last_indexed | 2025-02-17T09:41:59Z |
| publishDate | 2018-06-01 |
| publisher | Riga Technical University Press |
| record_format | Article |
| series | The Baltic Journal of Road and Bridge Engineering |
| spelling | doaj.art-da72fc61efeb4b5a9e68eff3f24056ad2025-01-02T07:57:43ZengRiga Technical University PressThe Baltic Journal of Road and Bridge Engineering1822-427X1822-42882018-06-0113211012010.7250/bjrbe.2018-13.4051167Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour ReductionIbtesam Abudallah Habib0Wan Hanna Melini Wan Mohtar1Atef Elsaiad2Ahmed El-Shafie3Dept of Civil and Structural Engineering, Universiti Kebangsaan Malaysia, Bandar Baru Bangi, Selangor, MalaysiaDept of Civil and Structural Engineering, Universiti Kebangsaan Malaysia, Bandar Baru Bangi, Selangor, MalaysiaDept of Water and Water Structures Engineering, Faculty of Engineering, Zagazig University, EgyptDept of Civil Engineering, Universiti Malaya, Jalan Universiti, Kuala Lumpur, Wilayah Persekutuan Kuala Lumpur, MalaysiaThis study investigates the performance nose-angle piers as countermeasures for local scour reduction around piers. Four nose angles were studied, i.e., 90°, 70°, 60° and 45° and tested in a laboratory. The sediment size was fixed at 0.39 mm whereas the flow angle of attack (or skew angle) was varied at four angles, i.e., skew angles, i.e., 0°, 10°, 20° and 30°. Scour reduction was clear when decreasing nose angles and reached maximum when the nose angle is 45°. Increasing the flow velocity and skew angle was subsequently increasing the scour profile, both in vertical and transversal directions. However, the efficiency of nose angle piers was only high at low Froude number less than 0.40 where higher Froude number gives minimal changes in the maximum scour depth reduction. At a higher skew angle, although showed promising maximum scour depth reduction, the increasing pier projected width resulted in the increase of transversal lengths.https://bjrbe-journals.rtu.lv/article/view/2188local scour countermeasurenose-angle pierskew angle |
| spellingShingle | Ibtesam Abudallah Habib Wan Hanna Melini Wan Mohtar Atef Elsaiad Ahmed El-Shafie Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour Reduction The Baltic Journal of Road and Bridge Engineering local scour countermeasure nose-angle pier skew angle |
| title | Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour Reduction |
| title_full | Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour Reduction |
| title_fullStr | Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour Reduction |
| title_full_unstemmed | Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour Reduction |
| title_short | Nose-Angle Bridge Piers as Alternative Countermeasures for Local Scour Reduction |
| title_sort | nose angle bridge piers as alternative countermeasures for local scour reduction |
| topic | local scour countermeasure nose-angle pier skew angle |
| url | https://bjrbe-journals.rtu.lv/article/view/2188 |
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