Seismic Damage Scenarios for Unreinforced Masonry Structures of the Colombian Cities of Bogotã¡, Medellã­n and Cali

Abstract eng:
This study presents a number of earthquake scenarios for unreinforced masonry structures located in the cities of Bogotá, Medellín and Cali, where 12.9 million of Colombians are settled (26% of Colombia’s population). These three cities are characterized by a medium to high seismic hazard. Exposure models for each city were developed in which residential buildings were identified according to their structural system, built-up area, replacement cost and number of inhabitants. Results from the exposure models indicate unreinforced masonry structures as the most common building class, a common trend in developing countries. Fragility curves for unreinforced masonry buildings were generated considering the local characteristics of this type of buildings. Seismic damage scenarios were developed for the three cities by the selection of possible earthquakes that could affect each city considering a return period of 475 years. The resulting damage scenarios indicate that events with moderate magnitude could cause slight to moderate damage to 16%, 3% and 20% of the exposed unreinforced masonry building stock in Bogotá, Medellín and Cali, respectively.

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