Numerical modelling of the effects of consolidation on the undrained spudcan capacity under combined loading in silty clay

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Abstract

The paper shows the increase in vertical and combined horizontal and moment bearing capacity of jack-up spudcan installed in silty clay, when a load-hold period is accounted for. The numerical implementation of a hypoplastic model for structured clays, combined with large deformation coupled analyses allowed the modelling of the spudcan installation process. Results were mapped into three-dimensional small strain analyses, conducted to investigate the combined loading capacity and describe the yield surface. The underlying failure mechanisms were investigated and increases in capacity due to consolidation determined. Experimental centrifuge data on carbonate silty clay validated the qualitative trend revealed numerically.

LanguageEnglish
Pages33-51
Number of pages19
JournalComputers and Geotechnics
Volume86
DOIs
StatePublished - 1 Jun 2017

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silty clay
Consolidation
consolidation
Clay
failure mechanism
centrifuge
bearing capacity
modeling
Jacks
Centrifuges
Bearing capacity
carbonate
clay
Carbonates
effect
trend

Cite this

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title = "Numerical modelling of the effects of consolidation on the undrained spudcan capacity under combined loading in silty clay",
abstract = "The paper shows the increase in vertical and combined horizontal and moment bearing capacity of jack-up spudcan installed in silty clay, when a load-hold period is accounted for. The numerical implementation of a hypoplastic model for structured clays, combined with large deformation coupled analyses allowed the modelling of the spudcan installation process. Results were mapped into three-dimensional small strain analyses, conducted to investigate the combined loading capacity and describe the yield surface. The underlying failure mechanisms were investigated and increases in capacity due to consolidation determined. Experimental centrifuge data on carbonate silty clay validated the qualitative trend revealed numerically.",
keywords = "Combined capacity, Consolidation, Hypoplasticity, Numerical modelling, Spudcan, VHM",
author = "Raffaele Ragni and Britta Bienen and Dong Wang and David Maš{\'i}n and Cassidy, {Mark J.}",
year = "2017",
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T1 - Numerical modelling of the effects of consolidation on the undrained spudcan capacity under combined loading in silty clay

AU - Ragni,Raffaele

AU - Bienen,Britta

AU - Wang,Dong

AU - Mašín,David

AU - Cassidy,Mark J.

PY - 2017/6/1

Y1 - 2017/6/1

N2 - The paper shows the increase in vertical and combined horizontal and moment bearing capacity of jack-up spudcan installed in silty clay, when a load-hold period is accounted for. The numerical implementation of a hypoplastic model for structured clays, combined with large deformation coupled analyses allowed the modelling of the spudcan installation process. Results were mapped into three-dimensional small strain analyses, conducted to investigate the combined loading capacity and describe the yield surface. The underlying failure mechanisms were investigated and increases in capacity due to consolidation determined. Experimental centrifuge data on carbonate silty clay validated the qualitative trend revealed numerically.

AB - The paper shows the increase in vertical and combined horizontal and moment bearing capacity of jack-up spudcan installed in silty clay, when a load-hold period is accounted for. The numerical implementation of a hypoplastic model for structured clays, combined with large deformation coupled analyses allowed the modelling of the spudcan installation process. Results were mapped into three-dimensional small strain analyses, conducted to investigate the combined loading capacity and describe the yield surface. The underlying failure mechanisms were investigated and increases in capacity due to consolidation determined. Experimental centrifuge data on carbonate silty clay validated the qualitative trend revealed numerically.

KW - Combined capacity

KW - Consolidation

KW - Hypoplasticity

KW - Numerical modelling

KW - Spudcan

KW - VHM

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DO - 10.1016/j.compgeo.2016.12.019

M3 - Article

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SP - 33

EP - 51

JO - Computers and Geotechnics

T2 - Computers and Geotechnics

JF - Computers and Geotechnics

SN - 0266-352X

ER -