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Risk Assessment of Offshore Wind Turbines Suction Bucket Foundation Subject to Multi-Hazard Events

Author

Listed:
  • Duc-Vu Ngo

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

  • Young-Jin Kim

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

  • Dong-Hyawn Kim

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

Abstract

For the offshore wind turbines (OWTs) located in a seismically active region, the occurrence of earthquakes combined with scour is a highly possible multi-hazard event. This study developed an alternative fragility analysis framework to assess the seismic performance of suction bucket-supported OWTs under the action of scour. First, the probabilistic approach was applied to calculate the occurrence probability of scour depth (SD) and earthquake events. Then, the possible combinations of these two events were considered in the analysis model to establish the fragility surface of the suction bucket foundation. Finally, by integrating the product of scour and earthquake hazard, as well as fragility curves, the suction bucket foundation failure probability was obtained. The developed framework provides a reliable approach to risk assessment for OWT-supporting structures in extreme event situations and can be applied to other complex natural hazards.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:5:p:2184-:d:1079014
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    References listed on IDEAS

    as
    1. Kim, Dong Hyawn & Lee, Sang Geun, 2015. "Reliability analysis of offshore wind turbine support structures under extreme ocean environmental loads," Renewable Energy, Elsevier, vol. 79(C), pages 161-166.
    2. 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.
    3. 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.
    4. Kim, Dong Hyawn & Lee, Sang Geun & Lee, Il Keun, 2014. "Seismic fragility analysis of 5 MW offshore wind turbine," Renewable Energy, Elsevier, vol. 65(C), pages 250-256.
    5. Duc-Vu Ngo & Jong-Kwon Lim & Dong-Hyawn Kim, 2022. "Reliability Analysis and Life Prediction of Aging LNG Unloading Arms Based on Non-Destructive Test Data," Energies, MDPI, vol. 15(24), pages 1-19, December.
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