Probabilistic equivalent linear soil spring stiffness analysis for gravity platforms: Illustrative example

Pinnaduwa Kulatilake, Suzanne Lacasse, Mohammed Gabr

Research output: Contribution to journalArticle

Abstract

The companion paper [1] suggests a procedure to perform equivalent linear soil spring stiffness analysis for gravity platforms founded on clay and loaded under undrained conditions. This paper provides an example to illustrate the suggested procedure. The CONDEEP SP4-10-24 platform concept proposed for the Troll field was used for the example. Plastic Drammen clay was chosen as the foundation soil to a depth of 150 m. Wave loads on the platform were estimated assuming a 70 yr platform life, plus an 18 hr storm build-up, plus a 6 hr storm with a return period of 100 yrs. The constitutive model for the soil was calculated for the 6 hr rare event in the load history, assuming that the rare even occurs at the end of the load history. The coefficients of variation of the equivalent soil spring stiffnesses (horizontal and rotational) were found to be around 0.50.

Original languageEnglish (US)
Pages (from-to)29-54
Number of pages26
JournalComputers and Geotechnics
Volume12
Issue number1
DOIs
StatePublished - 1991
Externally publishedYes

Fingerprint

gravity platform
stiffness
Gravitation
Stiffness
Soils
Clay
soil
clay
return period
history
Constitutive models
plastic
Plastics
analysis

ASJC Scopus subject areas

  • Computer Science Applications
  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Probabilistic equivalent linear soil spring stiffness analysis for gravity platforms : Illustrative example. / Kulatilake, Pinnaduwa; Lacasse, Suzanne; Gabr, Mohammed.

In: Computers and Geotechnics, Vol. 12, No. 1, 1991, p. 29-54.

Research output: Contribution to journalArticle

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