A new hysteretic seadbed model for Riser-Soil interaction

Ehssan Zargar

Research output: ThesisDoctoral Thesis

Abstract

A new soil model was developed enabling more accurate modelling of riser-soil interaction. This model uses a unified mathematical approach for modelling nonlinear soil behaviour in all penetration and uplift modes. It is able to represent trench formation explicitly and capture soil degradation in consecutive load cycles. The model was coded in an in-house Fortran program as a user defined element in Abaqus software and the results were compared very well with different test data for riser soil interaction. It was also used for structural response and fatigue performance of a steel catenary riser system under cyclic loads.
LanguageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • The University of Western Australia
Award date9 Oct 2017
DOIs
StateUnpublished - 2017

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Soils
Cyclic loads
Fatigue of materials
Degradation
Steel

Cite this

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title = "A new hysteretic seadbed model for Riser-Soil interaction",
abstract = "A new soil model was developed enabling more accurate modelling of riser-soil interaction. This model uses a unified mathematical approach for modelling nonlinear soil behaviour in all penetration and uplift modes. It is able to represent trench formation explicitly and capture soil degradation in consecutive load cycles. The model was coded in an in-house Fortran program as a user defined element in Abaqus software and the results were compared very well with different test data for riser soil interaction. It was also used for structural response and fatigue performance of a steel catenary riser system under cyclic loads.",
keywords = "Soil-Riser Interaction, Nonlinear Hysteretic Seabed Model, Nonlinear Soil Model, Trench formation, soil Degradation, Touch Down Zone",
author = "Ehssan Zargar",
year = "2017",
doi = "10.4225/23/59f9222f76868",
language = "English",
school = "The University of Western Australia",

}

Zargar, E 2017, 'A new hysteretic seadbed model for Riser-Soil interaction', Doctor of Philosophy, The University of Western Australia. DOI: 10.4225/23/59f9222f76868

A new hysteretic seadbed model for Riser-Soil interaction. / Zargar, Ehssan.

2017.

Research output: ThesisDoctoral Thesis

TY - THES

T1 - A new hysteretic seadbed model for Riser-Soil interaction

AU - Zargar,Ehssan

PY - 2017

Y1 - 2017

N2 - A new soil model was developed enabling more accurate modelling of riser-soil interaction. This model uses a unified mathematical approach for modelling nonlinear soil behaviour in all penetration and uplift modes. It is able to represent trench formation explicitly and capture soil degradation in consecutive load cycles. The model was coded in an in-house Fortran program as a user defined element in Abaqus software and the results were compared very well with different test data for riser soil interaction. It was also used for structural response and fatigue performance of a steel catenary riser system under cyclic loads.

AB - A new soil model was developed enabling more accurate modelling of riser-soil interaction. This model uses a unified mathematical approach for modelling nonlinear soil behaviour in all penetration and uplift modes. It is able to represent trench formation explicitly and capture soil degradation in consecutive load cycles. The model was coded in an in-house Fortran program as a user defined element in Abaqus software and the results were compared very well with different test data for riser soil interaction. It was also used for structural response and fatigue performance of a steel catenary riser system under cyclic loads.

KW - Soil-Riser Interaction

KW - Nonlinear Hysteretic Seabed Model

KW - Nonlinear Soil Model

KW - Trench formation

KW - soil Degradation

KW - Touch Down Zone

U2 - 10.4225/23/59f9222f76868

DO - 10.4225/23/59f9222f76868

M3 - Doctoral Thesis

ER -