Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Modèle d'atténuation sismique: prédiction probabiliste des pics d'accélération
The attenuation models provide, with given level of probability, the maximal accelerations that may produce, at given distances, an earthquake having a given magnitude and depth. The maps of seismic hazards may then be drawn, for a region or country, for given levels of peak acceleration. These levels and maps are the input criteria for the structural design. The existing attenuation laws are often empirical and obtained by numerical regression and fitting to measures produced by real earthquakes, considering the magnitude, the epicentral, hypocentral distance or closest distance to the fault rupture, the kind of fault rupture, etc. They have then a regional validity. The simplified model proposed herein is parametric and is not based on numerical regression. The governing parameters are the magnitude, the depth and the epicentral distances or closest distance to the fault rupture. The peaks of horizontal accelerations provided by the model are compared to the measures obtained during various strong ground motions: Kobé (Japan, 1995), Loma Prieta (USA, 1989) and Kocaeli (Turkey, 1999). The model is also compared to the usual attenuation laws for Venezuela, for the earthquake that occurred in Cariaco (Vénézuela, 1997). The results obtained with the same set of parameters values are in good accordance with the whole experimental measures.
Modèle d'atténuation sismique: prédiction probabiliste des pics d'accélération
The attenuation models provide, with given level of probability, the maximal accelerations that may produce, at given distances, an earthquake having a given magnitude and depth. The maps of seismic hazards may then be drawn, for a region or country, for given levels of peak acceleration. These levels and maps are the input criteria for the structural design. The existing attenuation laws are often empirical and obtained by numerical regression and fitting to measures produced by real earthquakes, considering the magnitude, the epicentral, hypocentral distance or closest distance to the fault rupture, the kind of fault rupture, etc. They have then a regional validity. The simplified model proposed herein is parametric and is not based on numerical regression. The governing parameters are the magnitude, the depth and the epicentral distances or closest distance to the fault rupture. The peaks of horizontal accelerations provided by the model are compared to the measures obtained during various strong ground motions: Kobé (Japan, 1995), Loma Prieta (USA, 1989) and Kocaeli (Turkey, 1999). The model is also compared to the usual attenuation laws for Venezuela, for the earthquake that occurred in Cariaco (Vénézuela, 1997). The results obtained with the same set of parameters values are in good accordance with the whole experimental measures.
Modèle d'atténuation sismique: prédiction probabiliste des pics d'accélération
Mebarki, Ahmed (Autor:in)
Revue Française de Génie Civil ; 8 ; 1071-1086
01.12.2004
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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