Shear bands in soft clays: strain-softening behavior in finite element method
D'Ignazio, Marco; Länsivaara, Tim (2015)
2015
Rakenteiden mekaniikka
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tty-201605033915
https://urn.fi/URN:NBN:fi:tty-201605033915
Kuvaus
Peer reviewed
Tiivistelmä
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.
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.
Kokoelmat
- TUNICRIS-julkaisut [19381]