Accounting for stress-dependent stiffness of skirted circular foundation during monotonic loading in layered seabed

Amin Barari, Lars Bo Ibsen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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Abstract

Calibration of Hardening Soil Model with Small-Strain Stiffness (HSsmall) for the centrifuge test of a laterally loaded suction caisson on a natural deposit of Yellow sea silty sand underlain by sandy silt is presented. The HSsmall model, in principle, consists of shear and compression hardening and is capable of simulating the stress-dependency of soil stiffness. A study site off the coast of Korea, so called Yellow sea, was selected as the reference prototype site which is considered to have great potential for future offshore wind farms. The study site seabed is composed of three layers of soil, of which only the top two layers are of interest. The top soil consists of a dense silty sand classified as SM and extends from the ground level to 11 m of depth. The second soil layer consists of a thick sandy silt from 11 m to 32 m of depth. Monotonic centrifuge test was performed on suction caisson having 15.5 m diameter and 10.5 m skirt length. Calibration of the HSsmall model was based on monotonic test data, drained triaxial tests, shear wave velocity measurements, CPT test data and empirical relationships for shear modulus at small strains.
Original languageEnglish
Title of host publication6th International Conference on Geotechnical and Geophysical Site Characterisation
Number of pages9
PublisherHungarian Geotechnical Society
Publication date2021
Article number489
Publication statusPublished - 2021
Event6th International Conference on Geotechnical and Geophysical Site Characterisation - Budapest, Hungary
Duration: 26 Sep 202129 Sep 2021
Conference number: 6

Conference

Conference6th International Conference on Geotechnical and Geophysical Site Characterisation
Number6
Country/TerritoryHungary
CityBudapest
Period26/09/202129/09/2021

Keywords

  • Calibration
  • Suction bucket
  • HSsmall model
  • Centrifuge Tests
  • Stiffness

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