Effect of Installation Platform on Bearing Capacity of an Offshore Monopile Foundation
An installation platform will disturb the natural seabed adjacent to a monopile and, consequently, affects the bearing capacity of the monopile foundation. Thus, consideration of the influence of installation disturbance is required in the monopile design, which can also save a fraction of the const...
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| Format: | Article |
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Frontiers Media S.A.
2022-01-01
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| Series: | Frontiers in Physics |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fphy.2021.809581/full |
| _version_ | 1798022432112508928 |
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| author | Chen Fabo He Ben Gao Peng Ge Xiangming Ge Xiangming Zhou Yong Zhou Yong Chu Weijiang Chu Weijiang |
| author_facet | Chen Fabo He Ben Gao Peng Ge Xiangming Ge Xiangming Zhou Yong Zhou Yong Chu Weijiang Chu Weijiang |
| author_sort | Chen Fabo |
| collection | DOAJ |
| description | An installation platform will disturb the natural seabed adjacent to a monopile and, consequently, affects the bearing capacity of the monopile foundation. Thus, consideration of the influence of installation disturbance is required in the monopile design, which can also save a fraction of the construction costs and avoid security risks. It was found in a sensitivity analysis, depending on the numerical simulations for an offshore monopile foundation installed using an installation platform, that the bearing capacities of the monopile were reduced by the penetration and extraction of the support legs of the installation platform, which were, a reduction of about 7% of the horizontal bearing capacity of the monopile (decreasing with a larger diameter of the monopile), about 2% of the ultimate bending moment, and almost no reduction of the vertical bearing capacity. For the monopile specifically subjected to the combined loads, it was found in SLS that horizontal displacement and rotation at the mudline increased by about 5.13% and 2.12%, respectively, and internal forces increased by about 3.29%–9.87%; and the horizontal displacement and the rotation at the mudline increased by about 4.56% and 2.79% in ULS, respectively, and the internal forces increased by about 3.49%–7.79% in the ULS. The study on the effects of the disturbance of the installation platform can be an important suggestion for the engineer in monopile design. |
| first_indexed | 2024-04-11T17:29:57Z |
| format | Article |
| id | doaj.art-42be952b256940c0b086bc83110b5166 |
| institution | Directory Open Access Journal |
| issn | 2296-424X |
| language | English |
| last_indexed | 2024-04-11T17:29:57Z |
| publishDate | 2022-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Physics |
| spelling | doaj.art-42be952b256940c0b086bc83110b51662022-12-22T04:12:09ZengFrontiers Media S.A.Frontiers in Physics2296-424X2022-01-01910.3389/fphy.2021.809581809581Effect of Installation Platform on Bearing Capacity of an Offshore Monopile FoundationChen Fabo0He Ben1Gao Peng2Ge Xiangming3Ge Xiangming4Zhou Yong5Zhou Yong6Chu Weijiang7Chu Weijiang8PowerChina Huadong Engineering Corporation Limited, Hangzhou, ChinaPowerChina Huadong Engineering Corporation Limited, Hangzhou, ChinaPowerChina Huadong Engineering Corporation Limited, Hangzhou, ChinaPowerChina Huadong Engineering Corporation Limited, Hangzhou, ChinaHydroChina Itasca R&D Center, Hangzhou, ChinaPowerChina Huadong Engineering Corporation Limited, Hangzhou, ChinaHydroChina Itasca R&D Center, Hangzhou, ChinaPowerChina Huadong Engineering Corporation Limited, Hangzhou, ChinaHydroChina Itasca R&D Center, Hangzhou, ChinaAn installation platform will disturb the natural seabed adjacent to a monopile and, consequently, affects the bearing capacity of the monopile foundation. Thus, consideration of the influence of installation disturbance is required in the monopile design, which can also save a fraction of the construction costs and avoid security risks. It was found in a sensitivity analysis, depending on the numerical simulations for an offshore monopile foundation installed using an installation platform, that the bearing capacities of the monopile were reduced by the penetration and extraction of the support legs of the installation platform, which were, a reduction of about 7% of the horizontal bearing capacity of the monopile (decreasing with a larger diameter of the monopile), about 2% of the ultimate bending moment, and almost no reduction of the vertical bearing capacity. For the monopile specifically subjected to the combined loads, it was found in SLS that horizontal displacement and rotation at the mudline increased by about 5.13% and 2.12%, respectively, and internal forces increased by about 3.29%–9.87%; and the horizontal displacement and the rotation at the mudline increased by about 4.56% and 2.79% in ULS, respectively, and the internal forces increased by about 3.49%–7.79% in the ULS. The study on the effects of the disturbance of the installation platform can be an important suggestion for the engineer in monopile design.https://www.frontiersin.org/articles/10.3389/fphy.2021.809581/fullmonopile with large diameterbearing capacityinstallation disturbancenumerical simulationFLAC3D |
| spellingShingle | Chen Fabo He Ben Gao Peng Ge Xiangming Ge Xiangming Zhou Yong Zhou Yong Chu Weijiang Chu Weijiang Effect of Installation Platform on Bearing Capacity of an Offshore Monopile Foundation Frontiers in Physics monopile with large diameter bearing capacity installation disturbance numerical simulation FLAC3D |
| title | Effect of Installation Platform on Bearing Capacity of an Offshore Monopile Foundation |
| title_full | Effect of Installation Platform on Bearing Capacity of an Offshore Monopile Foundation |
| title_fullStr | Effect of Installation Platform on Bearing Capacity of an Offshore Monopile Foundation |
| title_full_unstemmed | Effect of Installation Platform on Bearing Capacity of an Offshore Monopile Foundation |
| title_short | Effect of Installation Platform on Bearing Capacity of an Offshore Monopile Foundation |
| title_sort | effect of installation platform on bearing capacity of an offshore monopile foundation |
| topic | monopile with large diameter bearing capacity installation disturbance numerical simulation FLAC3D |
| url | https://www.frontiersin.org/articles/10.3389/fphy.2021.809581/full |
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