Suction caissons are hollow cylinders open towards the bottom currently used as anchors for deep water offshore facilities. They recently turned out to be advantageously exploited as foundation for offshore wind turbines in shallow water (Senders 2009). The Prevost model for cohesionless soils (Prevost 1985) is adapted for the modelling of their cyclic behaviour. It is able to reproduce plastic deformation in both loading and unloading, contractancy of the soil and pore pressure build up as well. In this paper, a fully-coupled transient axisymmetric analysis of a suction caisson is carried out. The monotonic partially drained behaviour of the caisson is firstly highlighted. Afterwards, pseudo-random and sinusoidal-equivalent storm signals are compared. Permanent displacements accumulated at the end of the storm show a good agreement between them but are slightly divergent, which indicates that the position of the extreme event might be a relevant issue.
|Title of host publication||Computer Methods and Recent Advances in Geomechanics|
|Subtitle of host publication||Proceedings of the 14th International Conference of the International Association for Computer Methods and Avances in Geomechanics (IACMAG)|
|Editors||Fusao Oka, Akira Murakami, Ryosuke Uzuoka, Sayuri Kimoto|
|Number of pages||6|
|Publication status||Published - 2015|
|Event||14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014 - Kyoto, Japan|
Duration: 22 Sep 2014 → 25 Sep 2014
|Conference||14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014|
|Period||22/09/14 → 25/09/14|
- Offshore Geotechnics
- Cyclic modelling
- Prevost model
Cerfontaine, B. (Ed.), Collin, F., & Charlier, R. (2015). Vertical transient loading of a suction caisson in dense sand. In F. Oka, A. Murakami, R. Uzuoka, & S. Kimoto (Eds.), Computer Methods and Recent Advances in Geomechanics: Proceedings of the 14th International Conference of the International Association for Computer Methods and Avances in Geomechanics (IACMAG) (pp. 929-934). CRC Press.