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Use of instability curves for the assessment of post-liquefaction stability and deformation of sloping grounds

Ismael, Bashar, Lombardi, Domenico, Bhattacharya, Subhamoy and Ahmad, Syed Mohammed (2019) Use of instability curves for the assessment of post-liquefaction stability and deformation of sloping grounds Engineering Geology.

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Abstract

The paper presents a simplified approach to determine the post-cyclic deformation of liquefied sloping grounds. The approach uses instability curves derived from undrained multi-stage (cyclic+monotonic) triaxial tests. It is shown that the salient aspects of the post-liquefaction deformation can be expressed as a function of the state parameter ψ, defined as the void ratio difference between the current state of the soil and its critical state at the same mean stress level, and amplitude of accumulated cyclic strain. As the proposed approach predicts deformations, rather than residual strength or factor of safety, the method can be used for the definition of the performance criteria following a performance-based design approach. The application of the proposed method is illustrated through a real case study.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Civil and Environmental Engineering
Authors :
NameEmailORCID
Ismael, Bashar
Lombardi, Domenico
Bhattacharya, Subhamoys.bhattacharya@surrey.ac.uk
Ahmad, Syed Mohammed
Date : 2019
Copyright Disclaimer : © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Slopes; Post-liquefaction; Dilatancy; Critical state; State parameter; Performance-based design
Related URLs :
Depositing User : Clive Harris
Date Deposited : 06 Nov 2019 10:00
Last Modified : 06 Nov 2019 10:00
URI: http://epubs.surrey.ac.uk/id/eprint/853052

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