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Site-City Seismic Interaction in Mexico City–Like Environments: An Analytical Study

LGIT
BP53, 38041 Grenoble Cedex 9, France
pgueg{at}obs.ujf-grenoble.fr
(P.G., P.-Y.B.)

LCPC
56 bd Lefebvre
75732 Paris Cedex 15, France
(P.G., P.-Y.B.)

UNAM
Instituto de Ingenieria
Coyoacan 14510 Mexico DF, Mexico
(F.J.C.G.)

Recent destructive earthquakes have confirmed the importance of hazard and vulnerability studies to predict and prevent the impact of large seisms. Most seismic risk analysis considers the buildings as a passive constituent integrated into the vulnerability analysis. This approach neglects the possible contribution of the building vibration to the free field. This article describes an analysis of site-city effects, that is, the seismic interaction of the city with soft soil layers. An analytic method derived from soil-structure interaction studies is described and applied to the Roma Norte zone of Mexico City. The building parameters are derived from detailed studies of the JA and PC buildings. The soil-city system is subjected to the Mexican (M_w 7.3) 14 September 1995 earthquake. The simulated ground surface motions, which incorporate the wave field radiated from the buildings of Roma Norte district, are compared to seismic records from this zone. Analytical procedures reproduce the long time duration and beating of the observed ground motion in Mexico City. Parametric analysis are also performed to identify the predominant factors (e.g., urbanization density, soil-to-city stiffness ratio) that favor the site-city interaction effects. A simple relation is proposed to estimate the expected efficiency of the site-city interaction effects for any city.

This article has been cited by other articles:

				M. Kham, J.-F. Semblat, P.-Y. Bard, and P. Dangla Seismic Site-City Interaction: Main Governing Phenomena through Simplified Numerical Models Bulletin of the Seismological Society of America, October 1, 2006; 96(5): 1934 - 1951. [Abstract] [Full Text] [PDF]

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				Analysis of RC Building Dynamic Response and Soil-Building Resonance Based on Data Recorded during a Damaging Earthquake (Molise, Italy, 2002) Bulletin of the Seismological Society of America, October 1, 2004; 94(5): 1943 - 1953.

				C. Boutin and P. Roussillon Assessment of the Urbanization Effect on Seismic Response Bulletin of the Seismological Society of America, February 1, 2004; 94(1): 251 - 268. [Abstract] [Full Text] [PDF]