Quantifying Residual Resistance of Light Pipelines during Large-Amplitude Lateral Displacement Using Sequential Limit Analysis
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 148, Issue 7
Abstract
The design of on-bottom pipelines regarding thermally induced lateral buckling requires a comprehensive understanding of large deformation lateral pipe–soil interactions to ensure that lateral buckles form as planned. This paper presents a numerical investigation into the lateral loading behavior of a pipe on undrained clay using sequential limit analysis. The lateral displacement experienced by the pipe is up to eight pipe diameters to capture the residual behavior. Validation against published centrifuge tests in terms of pipe invert trajectory and lateral soil resistance is achieved before a detailed parametric study is presented. Lower and upper bound estimates of the critical pipe weight that differentiates light from heavy pipe behavior are derived. Analytical equations are then developed to predict the lateral residual resistances, accounting for the influence of pipe weight, initial embedment, strength gradient, unit weight, and strain softening effect, and the predictions compare very well with a number of model test results.
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Data Availability Statement
Some or all of the data, models, or code that support the findings of this study are available from the corresponding author on reasonable request.
Acknowledgments
The author expresses deep gratitude toward Professor Chris Martin and Professor Byron Byrne of the University of Oxford for their supervision of most numerical simulations of this work. In particular, the FELA code OxLim provided by Professor Chris Martin is of crucial importance to the present study. The funds from the National Natural Science Foundation of China (Grant Nos. 52071289 and 51988101) are also acknowledged.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 148 • Issue 7 • July 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: May 6, 2020
Accepted: Mar 14, 2022
Published online: May 7, 2022
Published in print: Jul 1, 2022
Discussion open until: Oct 7, 2022
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