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A reformulated hardening soil model

Bower, Thomas Ashley, Jefferson, Anthony D. and Cleall, Peter J. 2019. A reformulated hardening soil model. Proceedings of the ICE - Engineering and Computational Mechanics 10.1680/jencm.18.00054

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Abstract

The hardening soil (HS) model is an advanced soil plasticity model which incorporates many features including stiffness stress dependency, hardening from initial loading, and soil dilatancy. In this paper, the HS model is explored in depth, and two improvements are proposed. The first is a new shear yield surface and hardening rule that have been reformulated to remove singularities. The second is a robust implicit return mapping scheme. Options for improving the global convergence of finite element analyses are also explored. Single elements tests replicate results from experimental triaxial data and previous versions of the HS model very closely, and at excellent convergence rates. In addition, a slope stability analysis is performed using the ϕ-c strength reduction method in 2D plane-strain. Results from the slope analysis showed good agreement with analytical and graphical slope stability methods. A 3D slope stability analysis was also conducted with modified boundary conditions, in order to demonstrate the 3D capabilities of the model.

Item Type: Article
Date Type: Published Online
Status: In Press
Schools: Engineering
Publisher: Thomas Telford (ICE Publishing)
ISSN: 1755-0777
Date of First Compliant Deposit: 30 July 2019
Date of Acceptance: 17 July 2019
Last Modified: 17 Oct 2019 14:14
URI: http://orca-mwe.cf.ac.uk/id/eprint/124597

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