Numerical Study of Longitudinal Bending in Buried GFRP Pipes Subjected to Lateral Earth Movements
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 8, Issue 1
Abstract
Buried energy pipelines span for hundreds of thousands of kilometres, crossing zones of soil instability and may need to be designed to resist differential ground movements. As a part of a comprehensive experimental and numerical study to examine the flexural performance of steel and fibreglass pressure pipes when loaded by lateral earth movements, this paper presents the numerical work simulating glass-fiber-reinforced polymers (GFRP) pipes that are 102 mm (4 in.) in nominal diameter and 1,830 mm (6 ft) long, subjected to lateral soil loading. The study investigated the effect of pipe laminate structure for crossply (), and angle-ply () laminates on soil resistance capacity, and the net pipe deflections at different burial depth-to-diameter (H/D) ratios of 3, 5, and 7. The development and verification of three-dimensional finite-element model against experimental data and a comparison against numerical data for steel control pipes of comparable dimensions and pressure rating is also presented and discussed. It was shown that the numerical model for the GFRP pipes can successfully capture the soil resistance capacity and pipe behavior in terms of load displacement and net bending deflection. Also, effect of material variation and fiber orientation were in agreement with observed behavior of test data.
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Acknowledgments
The work was funded by the Natural Sciences and Engineering Research Council of Canada, through Discovery Grants to Dr. Fam and Dr. Moore.
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 8 • Issue 1 • February 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jun 14, 2015
Accepted: Jan 5, 2016
Published online: Jul 7, 2016
Discussion open until: Dec 7, 2016
Published in print: Feb 1, 2017
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