|
Titre :
|
Estimating fully probabilistic seismic sliding displacements of slopes from a pseudoprobabilistic approach (2011)
|
|
Auteurs :
|
Ellen M. Rathje, Auteur ;
Gokhan Saygili, Auteur
|
|
Type de document :
|
Article : texte imprimé
|
|
Dans :
|
Journal of geotechnical and geoenvironmental engineering (Vol. 137 N° 3, Mars 2011)
|
|
Article en page(s) :
|
pp. 208-217
|
|
Note générale :
|
Géotechnique
|
|
Langues :
|
Anglais
|
|
Index. décimale :
|
624.1 (Infrastructures.Ouvrages en terre. Fondations. Tunnels)
|
|
Tags :
|
Probabilistic Seismic hazard Assessment Slope displacement performance
|
|
Résumé :
|
Permanent sliding displacements are used to evaluate the seismic stability of earth slopes, and current practice utilizes a pseudoprobabilistic approach to predict the expected sliding displacement. The pseudoprobabilistic approach specifies a design ground-motion level based on a probabilistic seismic hazard analysis and a specified hazard level (e.g., 2% probability of exceedance in 50 years), but the displacement is predicted deterministically based on the design ground-motion level. The fully probabilistic approach develops a hazard curve for sliding displacement, and it is used to assess the displacement of the slope for a given hazard level. Comparisons of the fully probabilistic and pseudoprobabilistic approaches indicate that the pseudoprobabilistic analysis provides nonconservative estimates of sliding displacement in most cases. This paper presents a modification to the pseudoprobabilistic approach that provides displacement values more consistent with the fully probabilistic approach. This modification involves specifying a displacement greater than the median, in order to take into account the uncertainty in the displacement prediction. The appropriate value of displacement above the median is a function of the ky/PGA value and the model used to predict the displacement.
|
|
DEWEY :
|
624.1
|
|
ISSN :
|
1090-0241
|
|
En ligne :
|
http://ascelibrary.org/gto/resource/1/jggefk/v137/i3/p208_s1?isAuthorized=no
|
