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Modelling the cyclic ratcheting of sands through memory-enhanced bounding surface plasticity

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)783-800
Number of pages18
JournalGéotechnique
Volume69
Issue number9
Early online date13 Aug 2019
DOIs
DateAccepted/In press - 2 Oct 2018
DateE-pub ahead of print - 13 Aug 2019
DatePublished (current) - 1 Sep 2019

Abstract

The modelling and simulation of cyclic sand ratcheting is tackled by means of a plasticity model formulated within the well-known critical state, bounding surface SANISAND framework. For this purpose, a third locus - termed the 'memory surface' - is cast into the constitutive formulation, so as to phenomenologically capture micro-mechanical, fabric-related processes directly relevant to the cyclic response. The predictive capability of the model under numerous loading cycles ('high-cyclic' loading) is explored with focus on drained loading conditions, and validated against experimental test results from the literature - including triaxial, simple shear and cyclic loading by oedometer test. The model proves capable of reproducing the transition from ratcheting to shakedown response, in combination with a single set of soil parameters for different initial, boundary and loading conditions. This work contributes to the analysis of soil-structure interaction under high-cyclic loading events, such as those induced by environmental and/or traffic loads.

    Research areas

  • constitutive relations, numerical modelling, offshore engineering, plasticity, sands, stiffness

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Documents

  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Thomas Telford at https://www.icevirtuallibrary.com/doi/abs/10.1680/jgeot.17.p.307 . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 1.95 MB, PDF document

    Embargo ends: 13/08/20

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