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A Modified Uniaxial Bouc-Wen Model for the Simulation of Transverse Lateral Pipe-Cohesionless Soil Interaction

Nguyen, Kien T. and Asimaki, Domniki (2018) A Modified Uniaxial Bouc-Wen Model for the Simulation of Transverse Lateral Pipe-Cohesionless Soil Interaction. In: Geotechnical Earthquake Engineering and Soil Dynamics V: Numerical Modeling and Soil Structure Interaction. Geotechnical Special Publication. No.292. American Society of Civil Engineers , Reston, VA, pp. 25-36. ISBN 9780784481479.

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This paper proposes a modified uniaxial Bouc-Wen model to evaluate reaction force-displacement backbone curve for transverse lateral pipe-cohesionless soil interaction. The model is capable of representing the nonlinearity and the smooth transition zone of the curve. Using unscented Kalman filter, the model parameter κ that controls the smoothness of transition zone is derived, on the basis of results from high-fidelity validated finite element analyses. κ is larger in loose sand compared to that in dense sand, implying a smoother transition zone of the curve for loose sand. There is a slight change of κ with pipe burial depth in case of dense sand, while the change is clearer and larger in loose sand. The variation of κ is related to the "passive-wedge" and "plow-through" failure mode of soil. The model is subsequently implemented in a series of soil-pipe interaction configurations, and the reaction force-deformation curves are found in good agreement with experimental data.

Item Type:Book Section
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Asimaki, Domniki0000-0002-3008-8088
Additional Information:© 2018 American Society of Civil Engineers. Published online: June 07, 2018.
Series Name:Geotechnical Special Publication
Issue or Number:292
Record Number:CaltechAUTHORS:20190522-150224679
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95708
Deposited By: Tony Diaz
Deposited On:22 May 2019 22:12
Last Modified:03 Oct 2019 21:15

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