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Slope-stability assessments using finite-element limit-analysis methods

journal contribution
posted on 2017-02-01, 00:00 authored by Kelvin Lim, An-Jui Li, Alexander Schmid, A V Lyamin
This paper utilizes finite-element limit-analysis methods to investigate the stability of slopes of various properties and in nature. Specifically, a slope with a soft (weak material) band, a postquake slope, and rock slopes were investigated. The conventional Mohr-Coulomb failure criterion and the Hoek-Brown failure criterion are utilized for soil and rock slopes, respectively. The Hoek-Brown failure criterion can be applied directly in the finite-element limit-analysis methods without the need for conversion to the equivalent Mohr-Coulomb parameters. The applicability of the numerical limit-analysis methods in both soil and rock slopes is clearly demonstrated. It is also significant to note that the results presented in this paper have two distinct solutions: the upper- and lower-bound solutions. In addition, the failure mechanisms of the slopes are also shown. Prior assumptions of the failure mechanisms are not required for these finite-element limit-analysis methods, therefore providing a more realistic understanding of slope failures.

History

Journal

International journal of geomechanics

Volume

17

Issue

2

Article number

06016017

Pagination

06016017-1 - 06016017-8

Publisher

American Society of Civil Engineers

Location

Reston, Va.

ISSN

1532-3641

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2017, ASCE