NDLI: Modelling of seismic hazard for the El-Dabaa area, Egypt

Content Provider	Springer Nature Link
Author	El Adham, K. A. El Hemamy, S. T.
Copyright Year	2005
Abstract	This paper reviews the likely ground acceleration related to a seismic event for the location of a nuclear power site at El-Dabaa, Egypt. More recent data have been integrated into the design philosophy developed some 20 years ago and seismic hazard assessment was carried out using probabilistic techniques. The maximum possible earthquake magnitude M max was estimated for the area surrounding El-Dabaa and the hazard parameter peak ground acceleration (PGA) calculated for given zones. The iso-acceleration map of the El-Dabaa area for a return period of 400 years indicates PGA values of 0.15 g, slightly above those for a 100-year return period. The results are in general very similar to those obtained using the deterministic approach of El-Sayed. The differences in some zones may be related to the fact that the probabilistic methods are very sensitive to the completeness of the data and use simple attenuation laws that oversimplify the wave’s propagation phenomena. The work on the estimation of PGAs will contribute to the determination of national seismic codes, giving guidance on which buildings must take seismic risk into consideration and the necessity to re-appraise the seismic risk for existing buildings.Dans le cadre du choix d’un site de centrale nucléaire à El-Dabaa (Egypte), l’article étudie les accélérations au sol susceptibles d’être générées par des événements sismiques. Les données les plus récentes sont prises en compte dans la méthodologie de dimensionnement développée il y a environ 20 ans et les évaluations de risque sismique ont été réalisées en utilisant des techniques probabilistes. La magnitude du séisme maximum possible M max a été estimée pour la région de El-Dabaa et le paramètre d’aléa PGA (accélération de pic au sol) a été calculé pour différentes zones. La carte d’iso-accélération de la région de El-Dabaa pour des événements d’une période de retour de 400 ans donne des valeurs de PGA de 0,15 g, légèrement supérieures à celles résultant d’événements de période de retour de 100 ans. Les résultats sont en général très semblables à ceux obtenus par l’approche déterministe de El-Sayed. Les différences pour certaines zones peuvent provenir du fait que les méthodes probabilistes sont très sensibles au caractère exhaustif ou non des données et utilisent des lois d’atténuation simplifiées pour la propagation des ondes sismiques. Les déterminations des accélérations de pic au sol réalisées contribueront à l’établissement des codes sismiques nationaux, apportant des règles pour les constructions nouvelles qui doivent intégrer le risque sismique et donnant des éléments pour réévaluer le risque sismique au droit de bâtiment préexistants.
Starting Page	273
Ending Page	279
Page Count	7
File Format	PDF
ISSN	14359529
Journal	Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur
Volume Number	65
Issue Number	3
e-ISSN	14359537
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-12-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Risque sismique Accélération de pic au sol Relations d’atténuation El-Dabaa Nature Conservation Geoecology/Natural Processes Structural Foundations, Hydraulic Engineering Applied Geosciences
Content Type	Text
Resource Type	Article
Subject	Geology Geotechnical Engineering and Engineering Geology

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