Resumen

OTALVARO CALLE, Iván Fernando; VILLARRAGA HERRERA, Manuel Roberto  y  NANCLARES, Francisco Javier. Characterization of the dynamic response of site on Medellin's Gabbro. Rev. ing. univ. Medellin [online]. 2008, vol.7, n.13, pp.57-69. ISSN 1692-3324.

About 90% of Colombian population occupies the Andean region, where most of the country's industry is located; it is characterized by medium and high seismic hazard in which rock acceleration can occur over 0.25 g, according to the 1984 General Seismic Hazard Study (AIS 300, 1998). Additionally, Medellin city, from a geotechnical point of view, is characterized by the variety of parental materials and types of soils originated by distinctive geomorphologic processes; besides, it is common to find different topographic features in slopes, ridges, and hills, which make of Medellin a complex seismic geotechnical environment. This variety of features generates multiple contrasts of geotechnical materials which modify propagation of seismic waves, thus generating a high hazard level in the land surface. This research was motivated by above described conditions and by the growing development of the city up the hills. This research makes a review of dynamic response of site in the homogeneous zone No. 12 of Medellin Seismic Microzoning (GSM, 1999).

Palabras clave : Site response; dynamics of soils; tropical soils; Gabbro.

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