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Título del libro: Earthquake Geotechnical Engineering For Protection And Development Of Environment And Constructions- Proceedings Of The 7th International Conference On Earthquake Geotechnical Engineering, 2019
Título del capítulo: Sudden soil subsidence in mexico city due to strong ground motions

Autores UNAM:
JORGE ABRAHAM DIAZ RODRIGUEZ;
Autores externos:

Idioma:
Inglés
Año de publicación:
2019
Palabras clave:

Deposits; Geotechnical engineering; Shear flow; Shear stress; Silica; Soils; Subsidence; Cyclic loading conditions; Mexico City; Soil deposits; Soil sample; Static loads; Stress history; Strong ground motion; Yielding stress; Earthquakes


Resumen:

During strong ground motions earthquakes, soil deposits of lacustrine origin, like those of Mexico City (MC), experience shear stresses produced by seismic waves that are added to the ones due to the static loads. In that situation the soil mass is heavily stressed to values larger than its yielding stress s'Y, and consequently starts to settle after the earthquake. However, sudden subsidence induced by strong ground motions of soils deposits rich in bio-genic silica (diatoms), such as the ones of MC; it is a little known phenomenon. The occurrence of the latter has come forward in MC during the 1957, 1985 and 2017 large magnitude earthquakes. Experimental results to study the mentioned phenomena are presented herein. The study included Mexico City soils samples under one-dimensional cyclic loading conditions, the results indicate that the yielding stress, s'Y and stress history are key parameters in the behavior of the soil samples tested. © 2019 Associazione Geotecnica Italiana, Rome, Italy.


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