Dipartimento di Ingegneria Idraulica, Geotecnica e Ambientale
Centre de recherche public Accréditation CIR
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Téléphone : +39 081 7683444
Mail : diga@unina.it
Adresse :
Via Claudio 21
80125 Napoli
Italie
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Profil scientifique partiel |
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Domaines étudiés partiels
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Quelques documents de Dipartimento di Ingegneria Idraulica, Geotecnica e Ambientale
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Influence of past loading history on the seismic response of earth dams
Auteurs :
Arézou Modaressi, Luca Pagano et Stefania Sica
Masquer le résumé
The paper deals with the influence of past loading history on the seismic response of earth dams by interpreting the static and dynamic behaviour of a real case-history: the El Infiernillo Dam. Settlements, pore water pressures and accelerations measured during different stages of the dam lifetime have been interpreted by using a coupled dynamic approach derived from the u–p formulation of the Biot consolidation theory. The approach is solved numerically with the finite element method. The study firstly investigates the effectiveness of the adopted model to predict the observed dam behaviour. Following, a parametric study has been performed to examine what effects, additional loading histories, have on the prediction of seismic-induced freeboard loss. The study brings out soil hardening effects induced by the past seismic history, and investigates to what extent earth dam response to a given earthquake may be affected by previous seismic events.
Softening and instability of natural slopes in highly fissured plastic clay shales
Auteurs :
A. Mandolini, L. Picarelli, M. Ramondini et G. Urciuoli
Masquer le résumé
Softening is often considered to be the main cause of first-time slides in OC clay, but so far the mechanics of softening has not been satisfactorily explained. Bearing on laboratory data and field observations about landslides in tectonized highly plastic clay shales of Italian Apennines, the paper describes a process of soil weakening that could explain some failures of natural slopes.
Monitoring fracture propagation in a soft rock (Neapolitan tuft) using acoustic emissions and digital images
Auteurs :
Sanctis Fiorenza De, Sanctis Fiorenza De, Stephen A. Hall et Gioacchino Viggiani
Pas de résumé disponible
Source :
INIST
Softening and instability of natural slopes in highly fissured plastic clay shales
Auteurs :
A. Mandolini, L. Picarelli, M. Ramondini et G. Urciuoli
Masquer le résumé
Softening is often considered to be the main cause of first-time slides in OC clay, but so far the mechanics of softening has not been satisfactorily explained. Bearing on laboratory data and field observations about landslides in tectonized highly plastic clay shales of Italian Apennines, the paper describes a process of soil weakening that could explain some failures of natural slopes.
Monitoring fracture propagation in a soft rock (Neapolitan tuft) using acoustic emissions and digital images
Auteurs :
Sanctis Fiorenza De, Sanctis Fiorenza De, Stephen A. Hall et Gioacchino Viggiani
Pas de résumé disponible
Source :
INIST
Monitoring fracture propagation in a soft rock (Neapolitan tuft) using acoustic emissions and digital images
Auteurs :
Sanctis Fiorenza De, Sanctis Fiorenza De, Stephen A. Hall et Gioacchino Viggiani
Pas de résumé disponible
Source :
INIST
Seismic behaviour of geotechnical structures
Auteurs :
S. Sica
Masquer le résumé
This paper deals with some fundamental considerations regarding the behaviour of geotechnical structures under seismic loading. First a complete definition of the earthquake disaster risk is provided, followed by the importance of performing site-specific hazard analysis. Then some suggestions are provided in regard to adequate assessment of soil parameters, a crucial point to properly analyze the seismic behaviour of geotechnical structures. The core of the paper is centered on a critical review of the analysis methods available for studying geotechnical structures under seismic loadings. All of the available methods can be classified into three main classes, including the pseudo-static, pseudo-dynamic and dynamic approaches, each of which is reviewed for applicability. A more advanced analysis procedure, suitable for a so-called performance-based design approach, is also described in the paper. Finally, the seismic behaviour of the El Infiernillo Dam was investigated. It was shown that coupled elastoplastic dynamic analyses disclose some of the important features of dam behaviour under seismic loading, confirmed by comparing analytical computation and experimental measurements on the dam body during and after a past earthquake.
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