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Seismic Fragility Assessment of a Novel Suction Bucket Foundation for Offshore Wind Turbine under Scour Condition

Author

Listed:
  • Duc-Vu Ngo

    (Department of Ocean Science and Engineering, Kunsan National University, Gunsan 54150, Korea)

  • Young-Jin Kim

    (Department of Ocean Science and Engineering, Kunsan National University, Gunsan 54150, Korea)

  • Dong-Hyawn Kim

    (School of Architecture and Coastal Construction Engineering, Kunsan National University, Gunsan 54150, Korea)

Abstract

This study proposed a new suction bucket (SB) foundation model for offshore wind turbines (OWT) suitable for a shallow muddy seabed, using more than three single buckets through kinetic derivation. The performance of new optimal foundation was evaluated by its horizontal displacement capacity and compared with a conventional SB composed of three buckets. Under external loads such as earthquakes, wind, and the combination of the both, the stability of this novel SB foundation was verified. The seismic fragility curve was also evaluated at some scour depths. These results were compared with the response of a tripod suction bucket (TSB) foundation, which was also designed for a shallow muddy seabed. The results indicated that scour significantly changed the dynamic response of this novel SB foundation but it had a better bearing capacity than the TSB foundation, despite its smaller size and weight. The fragility of TSB is always higher than the developed foundation in the same environmental condition. With reasonable volume and size, this novel SB foundation has great potential for future industrialization and commercialization.

Suggested Citation

  • Duc-Vu Ngo & Young-Jin Kim & Dong-Hyawn Kim, 2022. "Seismic Fragility Assessment of a Novel Suction Bucket Foundation for Offshore Wind Turbine under Scour Condition," Energies, MDPI, vol. 15(2), pages 1-22, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:2:p:499-:d:722217
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    Citations

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    Cited by:

    1. Duc-Vu Ngo & Young-Jin Kim & Dong-Hyawn Kim, 2023. "Risk Assessment of Offshore Wind Turbines Suction Bucket Foundation Subject to Multi-Hazard Events," Energies, MDPI, vol. 16(5), pages 1-13, February.
    2. Young-Jin Kim & Duc-Vu Ngo & Jang-Ho Lee & Dong-Hyawn Kim, 2022. "Ultimate Limit State Scour Risk Assessment of a Pentapod Suction Bucket Support Structure for Offshore Wind Turbine," Energies, MDPI, vol. 15(6), pages 1-14, March.
    3. Gee-Nam Lee & Duc-Vu Ngo & Sang-Il Lee & Dong-Hyawn Kim, 2023. "Fatigue Life Convergence of Offshore Wind Turbine Support Structure According to Wind Measurement Period," Energies, MDPI, vol. 16(7), pages 1-14, April.

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