Determining the Soil Modulus for Use in Soil–Pipe Interaction Modeling
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 14, Issue 2
Abstract
Research and engineering practice for the earthquake, landslide, or tunneling response of underground pipelines has focused on large ground deformation (LGD) effects, recognizing that LGD often causes the most serious local damage in buried pipelines. The adjacent soil reaction that develops as the pipe moves, i.e., soil–pipe interaction, is of key importance in the response of underground pipelines subject to LGD. A finite-element elastoplastic model can be used to analyze the soil–pipe interaction, and the model requires a soil modulus to simulate the force versus displacement behavior. In the simulation of soil–pipe interaction, a secant modulus associated with high stress and strain should be used in the finite-element model rather than an initial tangent modulus. This research provides a strain-compatible secant modulus that can be used in a finite-element analysis (FEA) of soil–pipe interaction for lateral, upward, downward, and oblique pipe movements. The favorable comparison between the experimental data and the FEA using the strain-compatible secant modulus implies that the proposed approach is suitable to predict soil–pipe behavior under large ground deformation.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors thank the Jackson-Hope Funds for Faculty Development of Virginia Military Institute (VMI) and the department head of Civil and Environmental Engineering at VMI, Dr. Newhouse, for their support.
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© 2023 American Society of Civil Engineers.
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Received: Mar 8, 2022
Accepted: Nov 17, 2022
Published online: Jan 13, 2023
Published in print: May 1, 2023
Discussion open until: Jun 13, 2023
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