Impact of cyclic degradation of soil properties on the performance of monopile foundations for offshore wind turbines: a qualitative numerical study
Impact of cyclic degradation of soil properties on the performance of monopile foundations for offshore wind turbines: a qualitative numerical study
Monopile foundations for offshore wind turbines experience significant cyclic loading originating from wind and waves. Degradation of soil properties under cyclic loading will likely impact the monopile behaviour and, therefore, this shall be accounted for in design. Among the different approaches used to evaluate cyclic degradation, cyclic contour diagrams provide information on both soil stiffness and shear strength degradation with number of cycles. Cyclic properties from contours are based on strain or pore pressure accumulation under storm loading and relevant load ratios. The paper investigates the impact of cyclic degradation of soil properties on the performance of monopiles by 3D FEA. The study is carried out for ideal soil profiles and for a given large diameter monopile geometry. Input parameters are established from databases. The aim is to qualitatively evaluate different assumptions when modelling cyclic degradation to provide insights into the impact of cyclic loading on monopile behaviour.
Marco D'Ignazio; Carlos Molina Mesa; Manuela Kanitz; Andres Cortez; Sebastian M. Bascunan Chaparro
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
12. Offshore geotechnics
https://doi.org/10.53243/NUMGE2023-88
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