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

Duc-Vu Ngo, Young-Jin Kim and Dong-Hyawn Kim ()
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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

Energies, 2023, vol. 16, issue 5, 1-13

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.

Keywords: offshore wind turbine (OWT); risk assessment; earthquake; scour; multi-hazard; suction bucket (SB) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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