Analytical study of thermal upheaval buckling for free spanning pipelines

Subsea pipelines with a free suspended span segment may be subject to upheaval buckling under high temperature, which may lead to a failure mode such as local buckling, fracture and fatigue. Mathematical models are established to study the upheaval buckling behaviour of subsea pipelines with a free span segment. Then, the accurate locations of the maxima of displacement and stress are obtained. The buckled configuration and the typical post-buckling behaviour and their dependence on free span length are analysed. Furthermore, a detailed analysis is presented for critical temperature difference, displacement amplitude and maximum axial compressive stress. Finally, the influence of touchdown on post-buckling behaviour during the process of upheaval buckling is discussed. The results show that the pipeline is prone to upheaval buckling when the free span length is large enough and the critical temperature difference decreases with increasing free span length. The displacement amplitude and the maximum stress within the span increase with the increase of the free span length before touchdown. However, after the pipeline touches the bottom of the free span, the maximum stress within the span decreases significantly compared to the case without touchdown, which becomes further smaller for smaller depth of the free span.

• Record URL:
  • https://doi.org/10.1016/j.oceaneng.2020.108220
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0029801820311446
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00298018
• Supplemental Notes:
  • © 2020 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Wang, Zhenkui
  • Tang, Yougang
  • Yang, Jianguo
  • Soares, C Guedes
• Publication Date: 2020-12-15

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: 108220
• Serial:
  • Ocean Engineering
  • Volume: 218
  • Issue Number: 0
  • Publisher: Pergamon
  • ISSN: 0029-8018
  • EISSN: 1873-5258
  • Serial URL: http://www.sciencedirect.com/science/journal/00298018

Subject/Index Terms

• TRT Terms: Analysis; Buckling; High temperature; Mathematical models; Underwater pipelines
• Subject Areas: Marine Transportation; Pipelines;

Filing Info

• Accession Number: 01890613
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 23 2023 10:14AM