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Reliability Analysis of Earth Slopes Using Direct Coupling

Siacara, A. T. / Napa-García, G. F. / Beck, A. T. / Futai, M. M.

This paper shows how accurately and efficiently reliability analyses of geotechnical installations can be performed by directly coupling geotechnical software with a reliability solver. An earth slope is used as the study object. The limit equilibrium method of Morgenstern-Price is used to calculate factors of safety and find the critical slip surface. The deterministic software package Slope/w is coupled with the StRAnD reliability software. Reliability indexes of critical probabilistic surfaces are evaluated by the first-order reliability methods (FORM). By means of sensitivity analysis, the effective cohesion ( $c^{'}$ \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ c^{\prime} $$\end{document}) is found to be the most relevant uncertain geotechnical parameter for slope equilibrium. The slope was tested using different geometries. Finally, a critical slip surface, identified in terms of minimum factor of safety, is shown here not to be the critical surface in terms of reliability index.

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Reliability Analysis of Earth Slopes Using Direct Coupling

Siacara, A. T. / Napa-García, G. F. / Beck, A. T. / Futai, M. M.

This paper shows how accurately and efficiently reliability analyses of geotechnical installations can be performed by directly coupling geotechnical software with a reliability solver. An earth slope is used as the study object. The limit equilibrium method of Morgenstern-Price is used to calculate factors of safety and find the critical slip surface. The deterministic software package Slope/w is coupled with the StRAnD reliability software. Reliability indexes of critical probabilistic surfaces are evaluated by the first-order reliability methods (FORM). By means of sensitivity analysis, the effective cohesion ( $c^{'}$ \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ c^{\prime} $$\end{document}) is found to be the most relevant uncertain geotechnical parameter for slope equilibrium. The slope was tested using different geometries. Finally, a critical slip surface, identified in terms of minimum factor of safety, is shown here not to be the critical surface in terms of reliability index.

Reliability Analysis of Earth Slopes Using Direct Coupling

Siacara, A. T. / Napa-García, G. F. / Beck, A. T. / Futai, M. M.

This paper shows how accurately and efficiently reliability analyses of geotechnical installations can be performed by directly coupling geotechnical software with a reliability solver. An earth slope is used as the study object. The limit equilibrium method of Morgenstern-Price is used to calculate factors of safety and find the critical slip surface. The deterministic software package Slope/w is coupled with the StRAnD reliability software. Reliability indexes of critical probabilistic surfaces are evaluated by the first-order reliability methods (FORM). By means of sensitivity analysis, the effective cohesion ( $c^{'}$ \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ c^{\prime} $$\end{document}) is found to be the most relevant uncertain geotechnical parameter for slope equilibrium. The slope was tested using different geometries. Finally, a critical slip surface, identified in terms of minimum factor of safety, is shown here not to be the critical surface in terms of reliability index.

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Title:

Reliability Analysis of Earth Slopes Using Direct Coupling

Additional title:

Lecture Notes in Civil Engineering

Contributors:

Barla, Marco (editor) / Di Donna, Alice (editor) / Sterpi, Donatella (editor) / Siacara, A. T. (author) / Napa-García, G. F. (author) / Beck, A. T. (author) / Futai, M. M. (author)

Conference:

International Conference of the International Association for Computer Methods and Advances in Geomechanics ; 2021 ; Turin, Italy

Published in:

Challenges and Innovations in Geomechanics ; Chapter: 110 ; 1001-1008

Lecture Notes in Civil Engineering ; 125

Publication date:

2021-01-15

Size:

8 pages

ISBN:

978-3-030-64514-4 , 978-3-030-64513-7

ISSN:

2366-2565 , 2366-2557

DOI:

https://doi.org/10.1007/978-3-030-64514-4_110

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Earth slope , Direct coupling , Reliability analysis , Equilibrium analysis Engineering , Geoengineering, Foundations, Hydraulics , Offshore Engineering , Geotechnical Engineering & Applied Earth Sciences , Engineering Mathematics

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