Abstract
AbstractOffshore wind turbines (OWTs) are now being constructed in seismic areas as part of a plan to achieve net-zero carbon dioxide emissions. Liquefaction caused by earthquakes poses a serious threat to the operation of OWTs. The dynamic response of the OWT on the suction bucket foundation in liquefiable sand under earthquakes combined wind loads was investigated in the present study. The FE-FD software named DBLEAVES-X with the Cyclic Mobility constitutive model was used in the research. The nonlinear dynamic analyses were carried out using a three-dimensional model of the OWT. The effects of earthquake, the wind load, sand density, and aspect ratio of the suction bucket on the behavior of the OWT were studied. The findings show that OWTs will be permanently tilted and displaced caused by wind, earthquake, and liquefaction. In seismic areas, this numerical model could be used in a comparative sense for the design of the OWT.KeywordsLiquefactionEarthquakeSuction bucket foundation
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