Modeling of Buried Pipelines in Dense Sand for Oblique Movement in Vertical–Lateral Plane
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 11, Issue 4
Abstract
Finite-element modeling of pipelines buried in dense sand under oblique loading in vertical (upward)–lateral load space is presented. The prepeak hardening, postpeak softening, density, and confining pressure–dependent behavior of sand are considered in simulations. A monotonic displacement-controlled loading is applied where pipe is displaced at an angle ranging from 0° (vertical upward) to 90° (lateral). The plots of vertical and lateral components of oblique force (load paths) resulting from the displacement-controlled loading show a significant nonassociated response for shallow burial depths and lateral loading cases. The restraint to vertical displacement during lateral displacement increases the lateral resistance. A simplified approach based on maximum vertical and lateral restraints, together with an inclination factor, is proposed to estimate the maximum oblique resistance.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request. It includes Abaqus input and output files.
Acknowledgments
The work presented in this paper has been supported by the Natural Sciences and Engineering Research Council of Canada (NSERC), Equinor (formerly Statoil), Petroleum Research Newfoundland and Labrador (PRNL), and Mitacs.
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 11 • Issue 4 • November 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Aug 23, 2019
Accepted: Jun 11, 2020
Published online: Aug 23, 2020
Published in print: Nov 1, 2020
Discussion open until: Jan 23, 2021
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