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A novel approach for time-dependent axial soil resistance in the analysis of subsea pipelines

A novel approach for time-dependent axial soil resistance in the analysis of subsea pipelines
A novel approach for time-dependent axial soil resistance in the analysis of subsea pipelines
A novel approach for modelling axial pipe–soil interaction, consisting of bespoke finite elements, is proposed. The purpose is to have a model that represents a two-dimensional slice of soil perpendicular to the pipe which is computationally cheap enough to be incorporated in global analysis of subsea pipelines, whilst capable of capturing detailed time-dependent soil response, which involves partial drainage and cyclic plasticity. This is achieved by handling the circumferential dimension analytically, reducing the behaviour of the two-dimensional soil slice to a one-dimensional case. Coupled consolidation analysis along a vertical sequence of one-dimensional elements beneath each pipeline node, tailored to represent the axial–vertical (or -radial) plane across the seabed semi-space, is supplemented by an analytical solution for the circumferential drainage. The paper presents the model development, its implementation through symbolic programming and validation against previously published continuum finite element analysis results.
0266-352X
641-651
Carneiro, D.
32ba49ac-f05f-4c12-89e8-dd06f75d0ac5
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Danziger, F.A.B.
f309847b-3b6b-4491-8c70-a5ffb65e187d
Ellwanger, G.B.
a01da093-1526-46c0-be59-15757c2ab447
Carneiro, D.
32ba49ac-f05f-4c12-89e8-dd06f75d0ac5
White, D.J.
a986033d-d26d-4419-a3f3-20dc54efce93
Danziger, F.A.B.
f309847b-3b6b-4491-8c70-a5ffb65e187d
Ellwanger, G.B.
a01da093-1526-46c0-be59-15757c2ab447

Carneiro, D., White, D.J., Danziger, F.A.B. and Ellwanger, G.B. (2015) A novel approach for time-dependent axial soil resistance in the analysis of subsea pipelines. Computers and Geotechnics, 69, 641-651. (doi:10.1016/j.compgeo.2015.07.002).

Record type: Article

Abstract

A novel approach for modelling axial pipe–soil interaction, consisting of bespoke finite elements, is proposed. The purpose is to have a model that represents a two-dimensional slice of soil perpendicular to the pipe which is computationally cheap enough to be incorporated in global analysis of subsea pipelines, whilst capable of capturing detailed time-dependent soil response, which involves partial drainage and cyclic plasticity. This is achieved by handling the circumferential dimension analytically, reducing the behaviour of the two-dimensional soil slice to a one-dimensional case. Coupled consolidation analysis along a vertical sequence of one-dimensional elements beneath each pipeline node, tailored to represent the axial–vertical (or -radial) plane across the seabed semi-space, is supplemented by an analytical solution for the circumferential drainage. The paper presents the model development, its implementation through symbolic programming and validation against previously published continuum finite element analysis results.

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More information

Accepted/In Press date: 3 July 2015
e-pub ahead of print date: 25 July 2015
Published date: 1 September 2015

Identifiers

Local EPrints ID: 419518
URI: https://eprints.soton.ac.uk/id/eprint/419518
ISSN: 0266-352X
PURE UUID: a8388479-558c-4e45-9e91-fa20c6499564
ORCID for D.J. White: ORCID iD orcid.org/0000-0002-2968-582X

Catalogue record

Date deposited: 13 Apr 2018 16:30
Last modified: 19 Jul 2019 11:00

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