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Stability of Vertically Bent Pipelines Buried in Sand

J. Pressure Vessel Technol.  -- August 2004 --  Volume 126,  Issue 3, 382 (9 pages)
DOI:10.1115/1.1767858


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Author(s):
Sahel N. Abduljauwad, Hamdan N. Al-Ghamedy, Junaid A. Siddiqui, Ibrahim M. Asi, and Naser A. Al-Shayea
Department of Civil Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
This paper discusses the stability of underground pipelines with preformed vertical bends buried in sandy soil. More specifically, the minimum cover height required to prevent the pipe from bowing under the action of forces due to temperature change and internal pressure is estimated. The variables considered include the pipe and soil materials, diameter, thickness, overburden height, bend radius, bend angle, internal pressure, fluid specific weight, and temperature variation. A comprehensive three-dimensional finite element analysis is carried out. The results are extracted from the output obtained. These results are put in a database which is used to develop general regression models to determine the relationships among the different variables. Different buckling modes are also considered. All of these results and models are entered into a computer software program for ready access.

©2004 ASME

History: Received May 10, 2002; revised February 16, 2004
DOI: http://dx.doi.org/10.1115/1.1767858
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KEYWORDS and PACS

Keywords
PACS
  • 81.40.Lm
    Deformation, plasticity, and creep
  • 91.60.Ba
    Elasticity, fracture, and flow of rocks/minerals
  • 62.20.Fe
    Deformation and plasticity including yield, ductility, and superplasticity
  • 02.70.Dh
    Finite-element and Galerkin methods
  • 46.32.+x
    Static buckling and instability
  • YEAR: 2004

PUBLICATION DATA

Doc Type:
Theoretical; Experimental
Coden:
JPVTAS
ISSN:
0094-9930 (print)   1528-8978 (online)
Publisher:
AIP is a member of CrossRef ASME

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