Modelado de la respuesta sísmica en el subsuelo de la ciudad de México, con registros a profundidad
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Abstract
We compare seismic responses at three depth levels at the PCC site (Puesto Central de Control) in Mexico City, using downhole three-component accelerometers installed by Fundaci6n ICA. Comparison is made of the spectral contents and peak amplitudes of acceleration. Transfer functions were computed from the observations, and compared with one-dimensional models. For the horizontal peak acceleration, there was no difference between the observed values at 40 and zero meters depth, whereas at the 20 m level there was a large amplification. A pair of well differentiated spectral bands of information was observed, for periods lower than 1.0 s, and for periods greater than 1.8 s. The dominant period (-2.1 s for this zone) is not present or dominant at the 40 m level, but is clearly observed at the 20 m level and at the surface.
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References
ACOSTA, J., 1990. Procesamiento estandard de acelerogramas. Manual de aplicación del paquete de procesamiento, CICESE (Versión 5.0).
BRAVO, M., F. SANCHEZ-SESMA y F. J. CHAVEZ-GARCIA, 1988. Ground motion on stratified alluvial deposits for incident SH waves, Bull. Seism. Soc. Am. 78. 2, 436-450. DOI: https://doi.org/10.1785/BSSA0780010083
HERRERA, I., E. ROSENBLUETH y O. RASCON, 1965. Earthquake spectrum prediction for the valley of Mexico, Proc. Third World Conference on Earthquake Engineering, 64-74. Auckland and Wellington, New Zeland.
HUERTA, C. y J. ACOSTA, 1991 Respuesta sísmica en tres niveles del subsuelo de Ia ciudad de México, Informe Técnico FICA/CICESE, Comunicaciones Académicas CICESE CISIT9005, 19 pp.
KAUSEL, E. y J. M. ROESSET, 1981. Stiffness matrices for layered soils, Bull. Seism. Soc. Am. 71, 6, 1743-1761. DOI: https://doi.org/10.1785/BSSA0710061743
URRUTIA J. L., S. E. RUIZ y R. DIEDERICH, 1989. Comparison of matrix methods in one-dimensional amplification problems. En: Engineering seismology and site response. Eds. A.S. Cakmak y I. Herrera, Computational Mechanics Publications.
MARSAL, R. J. y M. MAZARI, 1959. El subsuelo de Ia ciudad de México, Facultad de Ingeniería, UNAM.
RIAL, J. A., 1984. Caustics and focusing produced by sedimentary basins. Application of catastrophe theory to earthquake seismology. Geophys. J. R. Astr. Soc. 79, 923-938. DOI: https://doi.org/10.1111/j.1365-246X.1984.tb02877.x
ROSENBLUETH, E., 1952. Teoría del diseño sísmico sobre mantos blandos. Ediciones ICA, Serie B, 14. Mexico.
ROSSET, J. M. y R. V. WHITMAN, 1969. Theoretical background for amplification studies. Research report No. R69-15, Soils publication No. 231, School of Engineering, dept. of civil engineering, Massachussets Institute of Technology. March 1969.
SANCHEZ-SESMA, F. J., 1983. Diffraction of elastic waves by three-dimensional surface irregularities, Bull. Seism. Soc. Am. 73, 1621-1636.
WASS, G. 1991, Effects of soft soil on building response in Mexico City, Taller Internacional de Sismología e Ingeniería Sísmica. CENAPRED, México D.F.
ZEEVAERT, L., 1964. Strong ground motions recorded during earthquakes of May the 11th and 19th, 1962 in Mexico City, Bull. Seism. Soc. Am. 54, 209-231. DOI: https://doi.org/10.1785/BSSA0540010209