Abstract
Offshore wind turbine generators (WTG) are commonly founded on single large diameter piles, named monopiles. These monopiles are subjected to significant lateral loads and thereby sizeable overturning bending moments mainly due to action of wind and wave forces; thus the critical geotechnical design situation for monopiles supporting WTGs is often related to lateral loading conditions. The Pile Soil Analysis (PISA) joint industry research project [1] has recently proposed a monopile design method which encompasses finite element (FE) calculations under a specific design framework. Soil reaction curves that are crucial for monopile design (i.e. lateral force and moment reactions along the shaft and at the base of the pile) are derived from FE calculations, subsequently calibrated and entered into a 1D model which is then used for design optimisation. This method is implemented within the PLAXIS MoDeTo (Monopile Design Tool) software. This paper presents results of a concept monopile design study under lateral monotonic loading with the use of the PLAXIS MoDeTo method.
Highlights
Soil reaction curves that are crucial for monopile design are derived from finite element (FE) calculations, subsequently calibrated and entered into a 1D model which is used for design optimisation
Derivation of soil reaction curves from finite element calculations to be used within a 1D framework (Timoshenko beam)
The Plaxis MoDeTo method is a straightforward and applicable method for concept design of monopiles. It provides a realistic representation of a typical large diameter monopile capturing the key elements of its behavior when subjected to lateral monotonic loading
Summary
Offshore wind turbine generators (WTG) are commonly founded on single large diameter piles, named monopiles. Soil reaction curves that are crucial for monopile design (i.e. lateral force and moment reactions along the shaft and at the base of the pile) are derived from FE calculations, subsequently calibrated and entered into a 1D model which is used for design optimisation. This method is implemented within the Plaxis MoDeTo (Monopile Design Tool) software [2]. This poster presents results of a concept monopile design study under lateral monotonic loading with the use of the Plaxis MoDeTo method
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