Evaluation of Elastic Stiffness Parameters for Pipeline–Soil Interaction
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 142, Issue 6
Abstract
This paper focuses on elastic stiffness parameters for axial, horizontal, and vertical motions of a pipeline relative to the seabed, with the aim of expressing these parameters in terms of fundamental elastic properties of the soil. Limited information exists in the literature on the axial elastic response of on-bottom pipelines, particularly for nonhomogeneous soil. Therefore, an approximate analytical approach was developed for axial stiffness, focusing on the case of shear modulus proportional to depth. The solution was then verified through numerical analysis. Further numerical analysis was carried out to obtain relationships for horizontal and vertical elastic stiffnesses of on-bottom pipelines. Finally, relationships among elastic stiffnesses were developed. Here recommendations are made for the selection of proper elastic stiffnesses in all three directions of motion. These recommendations allow consistent and rigorous modeling of elastic pipe–seabed interactions with application to the analysis of pipeline laying, buckling, walking, and on-bottom stability.
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Acknowledgments
The research presented here forms part of the activities of the Centre for Offshore Foundation Systems (COFS), currently supported as a node of the Australian Research Council Centre of Excellence for Geotechnical Science and Engineering (Grant CE110001009) and through the Fugro Chair in Geotechnics, the Lloyd’s Register Foundation Chair and Centre of Excellence in Offshore Foundations, and the Shell EMI Chair in Offshore Engineering.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 142 • Issue 6 • June 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jul 1, 2015
Accepted: Nov 13, 2015
Published online: Feb 22, 2016
Published in print: Jun 1, 2016
Discussion open until: Jul 22, 2016
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