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Título del libro: Proceedings Of The International Conference On Soil Mechanics And Foundation Engineering
Título del capítulo: Local site effects on Mexico City ground motions

Autores UNAM:
MIGUEL PEDRO ROMO ORGANISTA; EFRAIN OVANDO SHELLEY;
Autores externos:

Idioma:
Inglés
Año de publicación:
1989
Palabras clave:

Clay Deposits - Earthquake Resistance; Clay Deposits - Wave Effects; Soils - Classification; Cocos Plate; Continental Plate; Geotechnical Microzonation Map; Seismic Response; Shear Wave Velocities; Earthquakes


Resumen:

Response spectra obtained from ground motions recorder during several earthquakes in Mexico City are used to show that the seismic response of the subsoil varies considerably from one site to the other. A broad classification of soil types provides geotechnical microzones within seismic response is directly related to local soil conditions. Even within the zone of deep, soft clay strata, seismic motions show a large variability. The paper demonstrates that local distribution of shear wave velocities and the depth of the soft clay deposits are of paramount importance in determining the spectral characteristics of seismic response. Spectra calculated at the same sites from earthquakes having different characteristics are used to show that the frequency content of the incoming excitation also bears an important role on the seismic behavior of soil deposits. Observational evidence indicates that even for very large magnitude events, the behavior of Mexico City clays remains mainly within the elastic range. Local site conditions and frequency distribution of seismic movements may combine to produce damage in zones of Mexico City that have not been severely damage in the past.


Entidades citadas de la UNAM: