Evaluation of elastic stiffness parameters for pipeline-soil interaction
Evaluation of elastic stiffness parameters for pipeline-soil interaction
This paper focuses on elastic stiffness parameters for axial, horizontal, and vertical motions of a pipeline relative to the seabed, with the aim of expressing these parameters in terms of fundamental elastic properties of the soil. Limited information exists in the literature on the axial elastic response of on-bottom pipelines, particularly for nonhomogeneous soil. Therefore, an approximate analytical approach was developed for axial stiffness, focusing on the case of shear modulus proportional to depth. The solution was then verified through numerical analysis. Further numerical analysis was carried out to obtain relationships for horizontal and vertical elastic stiffnesses of on-bottom pipelines. Finally, relationships among elastic stiffnesses were developed. Here recommendations are made for the selection of proper elastic stiffnesses in all three directions of motion. These recommendations allow consistent and rigorous modeling of elastic pipe-seabed interactions with application to the analysis of pipeline laying, buckling, walking, and on-bottom stability.
Elasticity, Numerical modeling, Offshore engineering, Pipelines, Soil-structure interaction, Theoretical analysis
Guha, Indranil
1ba88002-5df6-4ece-a7a1-312cf699fac0
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
1 June 2016
Guha, Indranil
1ba88002-5df6-4ece-a7a1-312cf699fac0
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633
White, David J.
a986033d-d26d-4419-a3f3-20dc54efce93
Guha, Indranil, Randolph, Mark F. and White, David J.
(2016)
Evaluation of elastic stiffness parameters for pipeline-soil interaction.
Journal of Geotechnical and Geoenvironmental Engineering, 142 (6), [04016009].
(doi:10.1061/(ASCE)GT.1943-5606.0001466).
Abstract
This paper focuses on elastic stiffness parameters for axial, horizontal, and vertical motions of a pipeline relative to the seabed, with the aim of expressing these parameters in terms of fundamental elastic properties of the soil. Limited information exists in the literature on the axial elastic response of on-bottom pipelines, particularly for nonhomogeneous soil. Therefore, an approximate analytical approach was developed for axial stiffness, focusing on the case of shear modulus proportional to depth. The solution was then verified through numerical analysis. Further numerical analysis was carried out to obtain relationships for horizontal and vertical elastic stiffnesses of on-bottom pipelines. Finally, relationships among elastic stiffnesses were developed. Here recommendations are made for the selection of proper elastic stiffnesses in all three directions of motion. These recommendations allow consistent and rigorous modeling of elastic pipe-seabed interactions with application to the analysis of pipeline laying, buckling, walking, and on-bottom stability.
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Accepted/In Press date: 13 November 2015
e-pub ahead of print date: 22 February 2016
Published date: 1 June 2016
Keywords:
Elasticity, Numerical modeling, Offshore engineering, Pipelines, Soil-structure interaction, Theoretical analysis
Identifiers
Local EPrints ID: 419539
URI: http://eprints.soton.ac.uk/id/eprint/419539
ISSN: 1090-0241
PURE UUID: 02637d3e-b583-4a31-b848-68dd01c6029c
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Date deposited: 13 Apr 2018 16:30
Last modified: 16 Mar 2024 04:32
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Author:
Indranil Guha
Author:
Mark F. Randolph
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