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TitleOvalization of steel energy pipelines buried in saturated sands during ground deformations
AuthorDadfar, B D; El Naggar, H E N; Nastev, M N
SourceComputers and Geotechnics 69, 2015 p. 105-113, https://doi.org/10.1016/j.compgeo.2015.05.004
Year2015
Alt SeriesEarth Sciences Sector, Contribution Series 20150108
PublisherElsevier
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
Subjectsgeophysics; mathematical and computational geology; soil mechanics; displacement; pipelines; Buried steel pipes; saturated sand; ovalization; finite element analysis
Illustrationsequations; graphs; tables
ProgramQuantitave risk assessment project, Public Safety Geoscience
AbstractCross-sectional ovalization of buried steel pipes subjected to bending moment induced by end displacements is discussed. A three dimensional finite element analysis was conducted employing Abaqus/CAE. The pipe was simulated using 3D shell elements while the saturated sand soil medium was simulated by employing discrete nonlinear springs along the pipeline. The effects of normalized burial depth (H/D), diameter to wall thickness ratio (D/t), sand density and level of the internal pressure on the ovalization are investigated, and resulting ovalization distribution with respect to bending moment at critical sections is presented. The results of this study enable simple one dimensional finite element models to consider geometrical cross-sectional nonlinearities in the analysis of buried pipelines.
Summary(Plain Language Summary, not published)
Cross-sectional ovalization of buried steel pipes subjected to bending moment induced by end displacements is discussed. Non-dimensional functions were developed for saturated loose and dense sands which can be used in simple linear models of pipelines used for transport of oil and gas.
GEOSCAN ID296664