Proceedings of the Rocscience International Conference (RIC 2023)

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3D Finite Element and Limit Equilibrium Modeling of the Initiation of Landslides

Authors
Rajib Dey1, *, Sina Javankhoshdel2, Amir Arsalan Jameei2, Sina Moallemi2
1WSP, Toronto, ON, Canada
2Rocscience, Toronto, ON, Canada
*Corresponding author. Email: rdey@mun.ca
Corresponding Author
Rajib Dey
Available Online 8 November 2023.
DOI
10.2991/978-94-6463-258-3_40How to use a DOI?
Abstract

Large-scale failure of riverbank slopes containing sensitive clays can occur rapidly under undrained conditions. Field observations and numerical analyses indicate that forming a quasi-horizontal shear band can develop from the toe of the slopes and initiate a progressive type of failure. In this study, a semi-horizontal localization of the maximum shear strain is captured on three-dimensional slope models using RS3 finite element software. The analyses are stopped after initiating these semi-horizontal deformation patterns because no special regularization techniques are used to model strength degrading in the softening regime. Degrading the strength parameters, in general, makes the simulations pathologically mesh-dependent. In addition, developing semi-horizontal patterns results in numerical non-convergence, indicating the initiation of global instability as the safety factor becomes less than one. In this study, the formation of the semi-horizontal pattern of maximum shear strain is investigated for two different sizes of toe erosion models. In addition, slope stability analyses are carried out using 3D limit equilibrium software of Slide3D at the stages where the non-convergence takes place. The results are compared for different toe erosion models and different solution methods.

Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the Rocscience International Conference (RIC 2023)
Series
Atlantis Highlights in Engineering
Publication Date
8 November 2023
ISBN
978-94-6463-258-3
ISSN
2589-4943
DOI
10.2991/978-94-6463-258-3_40How to use a DOI?
Copyright
© 2023 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Rajib Dey
AU  - Sina Javankhoshdel
AU  - Amir Arsalan Jameei
AU  - Sina Moallemi
PY  - 2023
DA  - 2023/11/08
TI  - 3D Finite Element and Limit Equilibrium Modeling of the Initiation of Landslides
BT  - Proceedings of the Rocscience International Conference  (RIC 2023)
PB  - Atlantis Press
SP  - 396
EP  - 406
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-258-3_40
DO  - 10.2991/978-94-6463-258-3_40
ID  - Dey2023
ER  -