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Shear bands in soft clays: strain-softening behavior in finite element method

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Details

Original languageEnglish
Pages (from-to)83-98
Number of pages16
JournalRakenteiden mekaniikka
Volume48
Issue number1
Publication statusPublished - 2015
Publication typeA1 Journal article-refereed

Abstract

Strain-softening behavior of soft sensitive clays is very often neglected in
geotechnical design. During undrained loading, such materials show a dramatic loss of strength after the peak stress, until residual strength is reached at large strain. As a consequence, local failure occurs and plastic strains localize in a shear band. Shear band modeling in Finite Element Method requires a regularization technique to overcome mesh dependency. NGI-ADPSoft2 model is able to simulate the post-peak softening behavior of sensitive clays. In this study, the influence of strain softening on the stability of sensitive clay slopes is studied using the NGI-ADPSoft2 model. The analyses are conducted using the finite element software PLAXIS 2D AE. The advantages of using a strain-softening soil model are discussed.

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