Modelling Extreme Oedometric Unloading of a High Plasticity Overconsolidated Clay with Two Anisotropic Bounding Surface Plasticity Models

Emil Mejlhede Kinslev*, Ole Hededal, Irene Rocchi, Varvara Zania

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

The development and improvement of constitutive relations for soil modelling in the past decades has resulted in a large suite of models that can account well for most experimental observations. The primary focus for their development has however been simulation of different static and cyclic shearing scenarios as well as isotropic and oedometric compression, while oedometric unloading simulations are commonly limited to relatively small OCR. Because of the recent progress in experimentation on extreme unloading (OCR > 20) of high plasticity overconsolidated clay, the necessary data for testing the capability of existing models in this scenario is available.

Two anisotropic bounding surface models: B-SClay1 and SANICLAY-B, are explored in terms of representing the extreme unloading of folded Røsnæs Clay. It is observed that the position of the conjugate point outside the zero principal stress lines for the bubble model makes the radial mapping rule superior in reproducing the deformation response. For the SANICLAY-B model a linear correlation is established between the gradual plasticity parameter and the experimentally observed swelling index plateau.
Original languageEnglish
Title of host publicationChallenges and Innovations in Geomechanics : Proceedings of the 16th International Conference of Iacmag
EditorsMarco Barla, Alice Di Donna, Donatella Sterpi, Alessandra Insana
Number of pages8
Volume3
PublisherSpringer
Publication date2023
Pages203-210
DOIs
Publication statusPublished - 2023
Event16th International Conference of the International Association for Computer Methods and Advances in Geomechanics - Politecnico di Torino Conference Centre, Torino, Italy
Duration: 30 Aug 20222 Sept 2022
Conference number: 16

Conference

Conference16th International Conference of the International Association for Computer Methods and Advances in Geomechanics
Number16
LocationPolitecnico di Torino Conference Centre
Country/TerritoryItaly
CityTorino
Period30/08/202202/09/2022
SeriesLecture Notes in Civil Engineering
Volume288
ISSN2366-2557

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