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Break-out resistance of offshore pipelines buried in inclined clayey seabed
- Source :
- Applied Ocean Research. 94:102007
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- The application of marine pipelines prevails in offshore developments for the transportation of oil and gas products from offshore to onshore, and some of them are inevitably buried in continental slopes with moderate inclinations (mostly below 6°). Regrettably, very limited attention has been paid to the bearing capacity of these pipelines, which generates the very motivation of this study. A total number of 169 200 separate finite element limit analyses (FELA) were conducted on rigid plane-strain pipe sections in inclined clayey seabed, using a sound FELA code OxLim. The breakout resistances of the pipe along all possible directions are explored to determine the most vulnerable plane where a transverse displacement could most likely take place, and accordingly the minimum breakout resistance. Before reaching a full-flow state, this resistance was found to be considerably lower, mostly by 15% to 35%, than the uplift resistance. Design charts that can be immediately used for the modification of existing database are then provided, which promotes the safe design of pipelines regarding transverse displacement or buckling. The potential non-conservation of the most recent design approaches is highlighted through comparisons.
- Subjects :
- Breakout
020101 civil engineering
Ocean Engineering
02 engineering and technology
01 natural sciences
010305 fluids & plasmas
0201 civil engineering
Pipeline transport
Transverse plane
Buckling
0103 physical sciences
Submarine pipeline
Geotechnical engineering
Bearing capacity
Displacement (fluid)
Geology
Seabed
Subjects
Details
- ISSN :
- 01411187
- Volume :
- 94
- Database :
- OpenAIRE
- Journal :
- Applied Ocean Research
- Accession number :
- edsair.doi...........7e02ea7754516e7cd8dd6468a8e9c703