Simplified model for the stiffness of suction caisson foundations under 6 DOF loading

SK Suryasentana, BW Byrne, HJ Burd, A Shonberg

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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Abstract

Suction caisson foundations are increasingly used as foundations for offshore wind turbines. This paper presents a new, computationally efficient, model to determine the stiffness of caisson foundations embedded in linearly elastic soil, when subjected to six degree-of-freedom loading; vertical (V), horizontal (Hx, Hy), overturning moment (Mx, My) and torsion (T). This approach is particularly useful for fatigue limit analyses, where the constitutive behaviour of the soil can be modelled as linearly elastic. The paper describes the framework on which the new model is based and the 3D finite element modelling required for calibration. Analyses conducted using the proposed approach compare well with results obtained using 3D finite element analysis. The possibility of low-cost analysis, coupled with a simple calibration process, makes the proposed design method an attractive candidate for intensive applications such as foundation design optimisation.
Original languageEnglish
Title of host publicationOffshore Site Investigation Geotechnics 8th International Conference Proceeding
Place of PublicationLondon
PublisherSociety for Underwater Technology
Pages554-561
Number of pages8
ISBN (Print)9780906940570
DOIs
Publication statusPublished - 12 Sept 2017
Event8th Offshore Site Investigation and Geotechnics International Conference - London, United Kingdom
Duration: 12 Sept 201714 Sept 2017

Conference

Conference8th Offshore Site Investigation and Geotechnics International Conference
Country/TerritoryUnited Kingdom
CityLondon
Period12/09/1714/09/17

Keywords

  • suction caisson foundations
  • offshore wind turbines

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