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Titre du document / Document title

Seismic hazard and countermeasures in Antofagasta - Chile

Auteur(s) / Author(s)

TAPIA GUTIERREZ P. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Civil Engineering Department, Universidad Catolica del Norte, Antofagasta, CHILI

Résumé / Abstract

Antofagasta is located in the north zone of Chile, in Atacama Desert, the driest desert in the world, and is 1500 km from the capital, Santiago. The principal activity in the areas around the city is mining. There are several cupper mines, which contribute substantially to the country's wealth. The soil conditions of Antofagasta suggest that the city is to certain extent protected against seismic events. Recent significant earthquakes caused little material damage to the city and the areas affected were concentrated in specific zones. However Antofagasta's seismic history does not go back far enough to suggest that the city is safe. The previous strongest motion (Mw∼9) occurred the last century (1877), therefore the 1995 earthquake (Mw=8.1) should be considered as a precursor to the end of a large seismic gap [10]. The type of construction in Antofagasta is very sismilar to that found the throughout the rest of country; differing only in the quality of materials employed. Construction is regulated however by several codes regarding both analysis and design. The Chilean Seismic Code is relatively old [3], its first version was approved in 1972. It has been updated twice (1993 and 1996), but maintains the chilean practice of the use of adequate shear walls density based design, which has always produced satisfactory results. The countermeasure employed in the case of a severe seismic event have been developed organically by the local emergency services. However, it would be preferable to work within a global system such as that to be developed through the Radius Project.

Revue / Journal Title

Bulletin of the International Institute of Seismology and Earthquake Engineering    ISSN  0074-655X   CODEN IISBB2 

Source / Source

1999, vol. 33, pp. 97-116 (15 ref.)

Langue / Language

Anglais

Editeur / Publisher

Ministry of Construction, Building Research Institute, Tokyo, JAPON  (1964) (Revue)

Mots-clés anglais / English Keywords

Antofagasta Chile

;

seismic risk

;

Atacama Desert

;

damage

;

history

;

earthquakes

;

magnitude

;

buildings

;

seismograms

;

zoning

;

classification

;

soils

;

acceleration

;

seismic intensity

;

tsunamis

;

prediction

;

Chile

;

South America

;

Mots-clés français / French Keywords

Antofagasta

;

Risque sismique

;

Désert Atacama

;

Dommage

;

Historique

;

Séisme

;

Magnitude

;

Bâtiment

;

Sismogramme

;

Zonalité

;

Classification

;

Sol

;

Accélération

;

Intensité sismique

;

Tsunami

;

Prévision

;

Habitation

;

Chili

;

Amérique du Sud

;

Mots-clés espagnols / Spanish Keywords

Riesgo sísmico

;

Desierto Atacama

;

Histórica

;

Sismo

;

Magnitud

;

Edificio

;

Sismograma

;

Zonalidad

;

Clasificación

;

Suelo

;

Intensidad sísmica

;

Tsunami

;

Previsión

;

Chile

;

America del sur

;

Localisation / Location

INIST-CNRS, Cote INIST : 14409, 35400008640535.0050

Nº notice refdoc (ud4) : 1289347



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