Axial Load-Transfer Curves for Suction Bucket Foundations in Sand

Sorin Grecu, Amin Barari, Lars Bo Ibsen

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

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Multi-footed structures resting on suction buckets (suction caisons) comprise a promising foundation solution for next-generation 10 MW+ offshore wind turbines located in transitional water depths. For such systems, predicting the axial behavior of buckets is a critical design aspect. Load-transfer or t–z curves have been employed for decades as an efficient tool in pile design, however applying existing formulations to suction buckets bears uncertainty. This paper introduces a novel family of static t–z curves (Winkler springs) for suction buckets installed in typical marine sand. The study is based on 50 finite-element models that involve various foundation dimensions and soil properties, as well as drained uplift and compression. The non-linear springs’ properties are therefore linked to suction bucket diameter, friction angle and vertical overburden pressure. Lastly, good agreement is found between the current results and the ones from other numerical studies. Since the proposed t–z curves require only three basic parameters, they may be conveniently implemented in preliminary stages of foundation design.
TitelThe Proceedings of The Twenty-ninth (2019) International Offshore and Polar Engineering Conference
RedaktørerJin S. Chung, Odd M. Akselsen, HyunWoo Jin, Hiroyasu Kawai, Yongwon Lee, Dmitri Matskevitch, Suak Ho Van, Decheng Wan, Alan M. Wang, Satoru Yamaguchi
ForlagInternational Society of Offshore & Polar Engineers
KapitelGeotechnical Engineering, Pile Foundation, Suction Bucket Foundation
ISBN (Elektronisk)978-1-880653-85-2
StatusUdgivet - 2019
BegivenhedThe International Society of Offshore and Polar Engineers 2019 - Honolulu, Hawaii, USA
Varighed: 16 jun. 201919 jun. 2019
Konferencens nummer: 29


KonferenceThe International Society of Offshore and Polar Engineers 2019
ByHonolulu, Hawaii
NavnProceedings of the International Offshore and Polar Engineering Conference


  • Suction bucket
  • t–z curves
  • Numerical modeling
  • Friction
  • Offshore foundation
  • Sand


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