Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill
Tsunamis can seriously damage bridges in coastal areas. Studies of such damage have elucidated the action of tsunami-induced forces on girders. However, tsunami-induced erosion of bridge-abutment backfill has been largely neglected. This article investigates this little-studied topic using hydraulic...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-11-01
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| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/8/11/922 |
| _version_ | 1797547818608492544 |
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| author | Tomoaki Nakamura Yuto Nakai Yong-Hwan Cho Norimi Mizutani |
| author_facet | Tomoaki Nakamura Yuto Nakai Yong-Hwan Cho Norimi Mizutani |
| author_sort | Tomoaki Nakamura |
| collection | DOAJ |
| description | Tsunamis can seriously damage bridges in coastal areas. Studies of such damage have elucidated the action of tsunami-induced forces on girders. However, tsunami-induced erosion of bridge-abutment backfill has been largely neglected. This article investigates this little-studied topic using hydraulic model experiments and numerical analyses. The results show that a tsunami erodes the backfill close to the abutment; the scale of the erosion increases with the duration of the tsunami. By contrast, the backfill on the far side of the abutment remains relatively intact. This suggests that the presence of the abutment accelerates the erosion of the backfill in its vicinity. A numerical simulation shows that the tsunami erodes the oval conical part of the backfill on the landward side of the onshore wing. When the erosion reaches the lower end of the wing the backfill begins to flow out from underneath. Thus, an increase in the soil-cover depth of the onshore wing might help slow down the erosion. |
| first_indexed | 2024-03-10T14:49:41Z |
| format | Article |
| id | doaj.art-4b4f3d0254b64258a0bbbc5d5c3d53af |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T14:49:41Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-4b4f3d0254b64258a0bbbc5d5c3d53af2023-11-20T21:03:32ZengMDPI AGJournal of Marine Science and Engineering2077-13122020-11-0181192210.3390/jmse8110922Modeling Tsunami-Induced Erosion of Bridge-Abutment BackfillTomoaki Nakamura0Yuto Nakai1Yong-Hwan Cho2Norimi Mizutani3Department of Civil and Environmental Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanCentral Japan Railway Company, JR Central Towers, 1-1-4, Meieki, Nakamura-ku, Nagoya 450-6101, JapanDepartment of Civil and Environmental Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanDepartment of Civil and Environmental Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, JapanTsunamis can seriously damage bridges in coastal areas. Studies of such damage have elucidated the action of tsunami-induced forces on girders. However, tsunami-induced erosion of bridge-abutment backfill has been largely neglected. This article investigates this little-studied topic using hydraulic model experiments and numerical analyses. The results show that a tsunami erodes the backfill close to the abutment; the scale of the erosion increases with the duration of the tsunami. By contrast, the backfill on the far side of the abutment remains relatively intact. This suggests that the presence of the abutment accelerates the erosion of the backfill in its vicinity. A numerical simulation shows that the tsunami erodes the oval conical part of the backfill on the landward side of the onshore wing. When the erosion reaches the lower end of the wing the backfill begins to flow out from underneath. Thus, an increase in the soil-cover depth of the onshore wing might help slow down the erosion.https://www.mdpi.com/2077-1312/8/11/922tsunamibridge abutmentbackfillerosion |
| spellingShingle | Tomoaki Nakamura Yuto Nakai Yong-Hwan Cho Norimi Mizutani Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill Journal of Marine Science and Engineering tsunami bridge abutment backfill erosion |
| title | Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill |
| title_full | Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill |
| title_fullStr | Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill |
| title_full_unstemmed | Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill |
| title_short | Modeling Tsunami-Induced Erosion of Bridge-Abutment Backfill |
| title_sort | modeling tsunami induced erosion of bridge abutment backfill |
| topic | tsunami bridge abutment backfill erosion |
| url | https://www.mdpi.com/2077-1312/8/11/922 |
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