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

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...

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Bibliographic Details
Published in:Energies (Basel) 2023-03, Vol.16 (5), p.2184
Main Authors: Ngo, Duc-Vu, Kim, Young-Jin, Kim, Dong-Hyawn
Format: Article
Language:English
Subjects:
Design and construction
Design specifications
earthquake
Earthquakes
Environmental aspects
Foundation failure
Fragility
Maximum likelihood method
Methods
multi-hazard
Offshore
Offshore energy sources
Offshore operations
Offshore wind farms
offshore wind turbine (OWT)
Probability distribution
Risk assessment
scour
Scour and fill (Geomorphology)
Scouring
Seismic activity
Seismic hazard
Seismic response
Simulation
Statistical analysis
Suction
suction bucket (SB)
Turbines
Wind farms
Wind power
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Summary: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.
ISSN:1996-1073
1996-1073
DOI:10.3390/en16052184