A Preliminary Report on the Tehuacan, Mexico Earthquake of June 15, 1999 (Mw = 7.0)

Singh, S. K.; Ordaz, M.; Pacheco, Jesús; Quaas, R.; Alcántara, L.; Alcocer, Sergio M.; Gutiérrez, Carlos A. Mortera; Meli, Roberto; Ovando, E.

doi:10.1785/gssrl.70.5.489

Cited by 55 publications

(35 citation statements)

References 7 publications

(7 reference statements)

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“…Iglesias et al (2002) estimated a stress drop of 360 bar for the Copalillo earthquake. Singh et al (1999) studied the Puebla earthquake; since it was under the influence of a strong directivity effect, the stress drop was not calculated (S. K. Singh, personal comm., 2000). The estimated effective crustal stress drop for the earthquake of 3 April 1997 was Dr ‫ס‬ 40 bar.…”

Section: Discussionmentioning

confidence: 99%

“…In general, the observed and predicted terms do not have to fit exactly, but they should follow the same trend on the shape of the spectra. Singh et al (1999) studied the Puebla earthquake, an intermediate-depth event that occurred on 15 June 1999 (M w 7.0), and reported on characteristics of the source and propagation. The earthquake was particularly destructive to historical monuments, but produced lower accelerations than similar earthquakes in the same region.…”

Section: Excitation Termmentioning

confidence: 99%

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Earthquake Ground-Motion Scaling in Central Mexico between 0.7 and 7 Hz

Ortega¹,

Herrmann²,

Quintanar³

2003

Bulletin of the Seismological Society of America

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We present results from a regional study of ground-motion scaling parameters in central Mexico using data from a short-period vertical-component network and two broadband stations within the valley of Mexico. A total of 1220 waveforms recorded between 1994 and 2001 are used for the analysis. A damped least-squares regression using a simple model to separate the excitation, site, and propagation effects for the peak velocities in selected narrow-bandpass frequencies was carried out. The propagation term was parameterized to define a piecewise continuous geometrical spreading function, a frequency-dependent Q (f ), and a distancedependent duration that are consistent with the random vibration theory. We measured the average attenuation of S and Lg waves. A final model with a quality factor of Q(f ) ‫ס‬ 180f 0.66 and a geometrical spreading of

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Section: Discussionmentioning

confidence: 99%

Section: Excitation Termmentioning

confidence: 99%

Earthquake Ground-Motion Scaling in Central Mexico between 0.7 and 7 Hz

Ortega¹,

Herrmann²,

Quintanar³

2003

Bulletin of the Seismological Society of America

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“…A partir de las tasas de excedencia en CU y las funciones de amplificación espectral es posible determinar el espectro de peligro uniforme para cada uno de los 1600 sitios, observando que (Esteva, 1970): (Singh et al, 1999); 2) los periodos de retorno que en este trabajo se recomiendan para diseño están asociados a sismos en que los efectos no lineales serán seguramente moderados o bajos, tal como ocurrió durante el sismo del 19 de septiembre de 1985; y 3) la incertidumbre en ( ) F T j es pequeña en comparación con la incertidumbre en las leyes de atenuación usadas en los cálculos de peligro (Pérez Rocha, 1999).…”

Section: Espectros De Peligro Uniformeunclassified

Normas de Diseño por Sismo en México DF: algunas novedades interesantes

Ordaz

2017

Alternativas

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RESUMEN La versión vigente de las Normas Técnicas Complementarias para Diseño porSismo (NTCDS) del Reglamento de Construcciones del DF fue desarrollada entre 1999 y 2000, y fue promulgada en 2004. De entonces a la fecha se han llevado a cabo diversas investigaciones que, junto con ideas de cambio que han ocurrido en el mundo, han permitido desarrollar una nueva versión de las NTCDS que posiblemente entrarán en vigor en 2016. En el presente trabajo se describen algunas de las modificaciones más novedosas, de entre las que destacan: a) una nueva "nanozonificación" sísmica que permite obtener espectros de diseño de sitio para casi todo el Distrito Federal; b) la inclusión de los cambios observados en las propiedades de los suelos por efecto del bombeo de agua; y c) los nuevos criterios para la especificación de sobreresistencia y reducciones por ductilidad. En adición, se discute la estructura general de la nueva norma y se reflexiona sobre las ventajas y limitaciones de las modificaciones propuestas.PALABRAS CLAVE: códigos de diseño, nanozonación, sobre-resistencia, reducción de la ductilidad In this paper, some of the most recent modifications are described, such as: a) a new seismic "nanozonation" that allows obtaining site design spectra for almost the entire Federal District; b) the inclusion of the changes observed in the properties of the soils due to the effect of water pumping; and c) the new criteria for the specification of over-resistance and reductions by ductility. In addition, it discusses the general structure of the new standard and reflects on the advantages and limitations of the proposed modifications.

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“…Severe earthquakes, frequently affecting most of the regions where these buildings are located, have been the most common cause of damage for these stone masonry constructions. The most recent experience in this regard was from the June 1999 Tehuaca´n earthquake (magnitude [M] 7.0), that damaged about 1,850 historic buildings, most of them being colonial temples and convents of the central states of Puebla and Oaxaca (Singh et al, 1999). In contrast, colonial buildings of this same time frame in Mexico City have shown a relatively good performance after the many earthquakes that have shaken the city during their existence.…”

Section: Hazards and Vulnerabilities Of Historic Colonial Buildingsmentioning

confidence: 99%

Criteria and Experiences on Structural Rehabilitation of Stone Masonry Buildings in Mexico City

Meli

Sánchez-Ramírez

2007

International Journal of Architectural Heritage

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Structural safety of colonial stone masonry buildings is severely jeopardized in most parts of Mexico by earthquakes and by ground subsidence. The situation is particularly severe in Mexico City where subsidence has been aggravated by excessive extraction of underground water. Despite of frequent rehabilitations, cumulative damage caused by differential settlements through the centuries has led many of these structures to a critical condition. This article provides a general description of the causes of differential settlements and their effects, reviews the new techniques developed and validated in Mexico City for correcting historic trends of differential settlements, and comments on the methods for improving structural behavior. Recent rehabilitations performed in two buildings are briefly described, emphasizing the criteria and techniques adopted and the underlying studies and analyses. The complexity of the actions to be taken and the basis of the supporting studies are outlined, with the conclusion that adequate performance of these buildings in the long term can only be achieved if the rate of regional settlement is significantly reduced by diminishing extraction of underground water.

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A Preliminary Report on the Tehuacan, Mexico Earthquake of June 15, 1999 (Mw = 7.0)

Cited by 55 publications

References 7 publications

Earthquake Ground-Motion Scaling in Central Mexico between 0.7 and 7 Hz

Earthquake Ground-Motion Scaling in Central Mexico between 0.7 and 7 Hz

Normas de Diseño por Sismo en México DF: algunas novedades interesantes

Criteria and Experiences on Structural Rehabilitation of Stone Masonry Buildings in Mexico City

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