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Factor of safety and probability of failure of rockfill embankments / M. R. Barbosa in Géotechnique, Vol. 39 N°3 (Septembre 1989) 

Public ISBD [article]  in Géotechnique > Vol. 39 N°3 (Septembre 1989) . - pp. 471 –483 Titre : Factor of safety and probability of failure of rockfill embankments Type de document : texte imprimé Auteurs : M. R. Barbosa, Auteur ; D. V. Morris, Auteur ; S. K. Sarma, Auteur Année de publication : 2007 Article en page(s) : pp. 471 –483 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Limit  state  design  analysis  Failure  Dams  Statistical  analysis Résumé : The limit equilibrium method is applied to analyse the stability of rockfill embankments. Stability charts that utilize contours of zero critical acceleration factor are generated. These charts are valuable as design aids and are presented in a form amenable for the direct computation of the factor of safety, which is a more familiar parameter of stability analysis. Reliability theory is then applied in the form of a second moment format, to compute the probability of failure of a rockfill embankment. Strength parameters are characterized using three slightly different density functions, to study the effect of truncation on the probability of failure of the system. The use of the logistic distribution is introduced, as a means of computing the failure probability of the structure without the aid of tables. The parameters necessary to compute both the factor of safety and its reliability, have been evaluated and are presented in graphical form, in terms of common design variables. A wide spectrum of practical combinations of geometries and strength parameters are covered by the study. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.3.471 [article] Factor of safety and probability of failure of rockfill embankments [texte imprimé] / M. R. Barbosa, Auteur ; D. V. Morris, Auteur ; S. K. Sarma, Auteur . - 2007 . - pp. 471 –483. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 39 N°3 (Septembre 1989) . - pp. 471 –483 Mots-clés : Limit  state  design  analysis  Failure  Dams  Statistical  analysis Résumé : The limit equilibrium method is applied to analyse the stability of rockfill embankments. Stability charts that utilize contours of zero critical acceleration factor are generated. These charts are valuable as design aids and are presented in a form amenable for the direct computation of the factor of safety, which is a more familiar parameter of stability analysis. Reliability theory is then applied in the form of a second moment format, to compute the probability of failure of a rockfill embankment. Strength parameters are characterized using three slightly different density functions, to study the effect of truncation on the probability of failure of the system. The use of the logistic distribution is introduced, as a means of computing the failure probability of the structure without the aid of tables. The parameters necessary to compute both the factor of safety and its reliability, have been evaluated and are presented in graphical form, in terms of common design variables. A wide spectrum of practical combinations of geometries and strength parameters are covered by the study. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.1989.39.3.471