Simplified Design Equations for Joints in Buried Flexible Pipes Based on Hetényi Solutions
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 140, Issue 3
Abstract
Laboratory experiments conducted on corrugated steel, PVC, and high-density polyethylene pipes have demonstrated that deformations in flexible pipes resulting, say, from surface live loads, attenuate rapidly away from the location of load application. As a result, while surface loads in the vicinity of a joint connecting two shallow buried pipe segments influence that joint, the deformations become negligible at the other ends of the two pipe segments. Therefore, solutions for shear, moment, and rotation have been developed assuming that the two pipes are very long, and that the response is not affected by the location or the characteristics of those other joints. This paper presents the formulations of the simplified design equations for flexible pipes, for both moment-transfer and moment-release joints. The design equations are developed using various closed-form solutions for beams on elastic foundations. A parametric study is then presented to examine the factors controlling the structural response of joints in flexible pipes, and comparisons are made to the laboratory experimental measurements.
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Acknowledgments
The research was funded by the National Cooperative Highway Research Program (NCHRP) through the Transportation Research Board of the National Academy of Sciences, Washington, DC. The findings, conclusions, or recommendations expressed in this document do not necessarily reflect the views of the sponsors.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 140 • Issue 3 • March 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Mar 3, 2013
Accepted: Jun 25, 2013
Published online: Jun 27, 2013
Published in print: Mar 1, 2014
Discussion open until: Apr 25, 2014
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