A new hysteretic seadbed model for Riser-Soil interaction

Ehssan Zargar

doi:10.4225/23/59f9222f76868

A new hysteretic seadbed model for Riser-Soil interaction

Ehssan Zargar

Research output: Thesis › Doctoral Thesis

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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.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Draper, Scott, Supervisor Kimiaei, Mehrdad, Supervisor Randolph, Mark, Supervisor
Award date	9 Oct 2017
DOIs	https://doi.org/10.4225/23/59f9222f76868
Publication status	Unpublished - 2017

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10.4225/23/59f9222f76868

THESIS - DOCTOR OF PHILOSOPHY - ZARGAR Ehssan - 2017
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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.",

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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

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DO - 10.4225/23/59f9222f76868

M3 - Doctoral Thesis

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A new hysteretic seadbed model for Riser-Soil interaction

Abstract

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