2022 Volume 78 Issue 2 Pages I_613-I_618
This paper focuses on the stability of a pile in sand bed under cyclic axial loading for TLP-type floating offshore wind turbines. The emphasis of the experiments was placed on understanding the responses, Stable, Unstable or Metastable, depending on mean and cyclic loading and investigating the degradation of tensile capacity of piles due to the cyclic load history. A range of centrifuge pile-sand tests was performed under a centrifugal acceleration of 50 gravities. It was found that the interaction diagram indicating pile-stability based on the experimental results for TLP-type was consistent with those from previous studies for bottom-mounted-type foundation for offshore wind turbines. The experimental results also show the pile tensile capacity could decrease due to the cyclic loading in Metastable.
