Cyclic loadings of offshore wind turbine monopiles

Duration: 46 months (2017 - 2020)


Today, bottom-fixed wind turbines represent the most mature offshore renewable energies technology. The foundation of a bottom-fixed wind turbine represents 15 to 20% of the total investment and no regulated framework exists for questions of design. Strong constraints for energy efficiency imply a constant increase in turbine power and directly impact foundation design where installation and operating efforts are supported (high rotor frequencies and waves cyclic stress).


To propose recommendations to predict the effects of cyclic loading resulting from seabed/structure interactions.

Scientific and technical contents

  • Development of an experimental reference database comprising the results of centrifuge tests then analysis of the behaviour of the monopile under transverse cyclic loading in dense sand.
  • Study of the behaviour of carbonate materials.
  • Study of the full-scale and modelled behaviour of monopiles in limestone.
  • Development of calculation tools to estimate the movements and strain on monopiles according to loading cycles.


Project sheet (PDF)

Partners and funding

This project is led by Ecole des Ponts ParisTech and France Energies Marines.

The total project budget is €998K.

This project receives funding from France Energies Marines and its members and partners, as well as French State funding managed by the National Research Agency under the Investments for the Future Programme (ANR-10-IEED-0006-18).

Photo credit: Fill / Pixabay

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