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Localised upheaval buckling of buried subsea pipelines

Van Der Heijden, G; Wang, Z; Tang, Y; (2018) Localised upheaval buckling of buried subsea pipelines. Marine Structures , 60 pp. 165-185. 10.1016/j.marstruc.2018.03.010. Green open access

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Abstract

Buried subsea pipelines under high temperature conditions tend to relieve their axial compressive force by forming localised upheaval buckles. This phenomenon is traditionally studied as a kind of imperfect column buckling problem. We study upheaval buckling as a genuinely localised buckling phenomenon without making any ad hoc assumptions on the shape of the buckled pipeline. We combine this buckling analysis with a detailed state-of-the-art nonlinear pipe-soil interaction model that accounts for the effect of uplift peak soil resistance for buried pipelines. This allows us to investigate the effect of cover depth of subsea pipelines on their load-deflection behaviour. Furthermore, the influence of axial and uplift peak soil resistance on the localised upheaval behaviour is investigated and the maximum axial compressive stress during the buckling process is discussed. Parameter studies reveal a limit to the temperature difference for safe operation of the pipeline. Localised upheaval buckling may then occur if the pipe is sufficiently imperfect or sufficiently dynamically perturbed.

Type: Article
Title: Localised upheaval buckling of buried subsea pipelines
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.marstruc.2018.03.010
Publisher version: http://dx.doi.org/10.1016/j.marstruc.2018.03.010
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Buried subsea pipelines, Localised upheaval buckling, Nonlinear pipe-soil interaction model
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10046235
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