Abstract
The present study aims to obtain p-y curves (Winkler spring properties for lateral pile-soil interaction) for liquefied soil from 12 comprehensive centrifuge test cases where pile groups were embedded in liquefiable soil. The p-y curve for fully liquefied soil is back-calculated from the dynamic centrifuge test data using a numerical procedure from the recorded soil response and strain records from the instrumented pile. The p-y curves were obtained for two ground conditions: (a) lateral spreading of liquefied soil, and (b) liquefied soil in level ground. These ground conditions are simulated in the model by having collapsing and non-collapsing intermittent boundaries, which are modelled as quay walls. The p-y curves back-calculated from the centrifuge tests are compared with representative reduced API p-y curves for liquefied soils (known as p-multiplier). The response of p-y curves at full liquefaction is presented and critical observations of lateral pile-soil interaction are discussed. Based on the results of these model tests, guidance for the construction of p-y curves for use in engineering practice is also provided.
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Acknowledgment
The first author acknowledges the financial support provided by UKIERI to carry out this research work at the University of Oxford. The authors also thank Prof. Anthony Blakeborough of the University of Oxford for providing guidance for some of the analyses presented herein. The authors also thank Dr. T. Tazoh, Japan, and Dr. J. H Jang, Korea for providing the experimental data used in this analysis.
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Dash, S.R., Bhattacharya, S. Experimental p-y curves for liquefied soils from centrifuge tests. Earthq. Eng. Eng. Vib. 20, 863–876 (2021). https://doi.org/10.1007/s11803-021-2059-y
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DOI: https://doi.org/10.1007/s11803-021-2059-y