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Analytical study of third-mode lateral thermal buckling for unburied subsea pipelines with sleeper

Van Der Heijden, G; Wang, Z; Tang, Y; (2018) Analytical study of third-mode lateral thermal buckling for unburied subsea pipelines with sleeper. Engineering Structures , 168 pp. 447-461. 10.1016/j.engstruct.2018.03.032. Green open access

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Abstract

Unburied subsea pipelines operating under high-temperature and high-pressure conditions tend to relieve their axial compressive force by forming lateral buckles. In order to manage lateral buckling, a sleeper is often employed as a buckle-initiation technique to ensure pipeline integrity. In this study, analytical solutions of third-mode lateral buckling for unburied subsea pipelines with sleeper are derived. The analytical solution is compared with experimental data in the literature and shows good agreement. The stability of the buckled pipeline is investigated by means of an energy analysis and it is found that third-mode lateral buckling has lower energy than first-mode buckling, which means that third-mode buckling is more likely to happen in practice. The influence of sleeper height and sleeper friction on lateral post-buckling behaviour is illustrated and analysed, with particular attention paid to the minimum critical temperature difference, lateral displacement amplitude and maximum stress. Our results show that increasing the height of the sleeper or decreasing the friction between pipeline and sleeper can both be used to decrease the minimum critical temperature difference, but their influence on the maximum stress is opposite.

Type: Article
Title: Analytical study of third-mode lateral thermal buckling for unburied subsea pipelines with sleeper
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.engstruct.2018.03.032
Publisher version: https://doi.org/10.1016/j.engstruct.2018.03.032
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: Subsea pipeline, lateral buckling, sleeper, beam-column, buckle initiation method
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/10047953
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