SEISMIC PERFORMANCE ASSESSMENT OF MONOPILEFOUNDATION OF OFFSHORE WIND TURBINE AGAINSTNEAR-FIELD AND FAR-FIELD EARTHQUAKES

Nowadays, offshore wind turbines (OWTs) have become a major renewable energy source.However, many of the offshore wind farms planned recently are located in seismic-prone areas, whichintroduces some challenges regarding their foundation design. In this study, the seismic behavior of a۵ MW offshore wind turbine on the monopile foundation embedded in liquefiable soil is investigatedunder near-field and far-field earthquakes using the finite element Method. The results of this studyshowed that the seismic response of the monopile-superstructure system under near-field earthquakeswas more critical despite the shorter duration and the smaller arias intensity of those earthquakes. Ithighlighted the remarkable effect of the other parameters such as near-field pulse which contained alot of energy

Keywords:

Offshore Wind Turbine , Monopile Foundation , Seismic Response , Near-Field andFar-field Earthquakes , Liquefaction , Finite Element Modeling