Examinando por Materia "Earthquake magnitude"
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Publicación IE-Riss: A computer tool for estimating earthquake losses in buildings(UNIV NAC COLOMBIA, FAC NAC MINAS, 2012-10-01) Sierra Alvarez, Cesar Augusto; Jaramillo Fernandez, Juan Diego; Mecánica AplicadaA probabilistic formulation for evaluating loss exceedance rates associated to earthquake is presented. First, the usefulness of such models is exposed; later, it is presented the mathematical formulation of a Poissonian model which considers the uncertainty in variables such as: the earthquake magnitude, the ground motion intensity at basement rock, the ground motion intensity at surface level and the damage at the buildings. The results are summarized by the annual exceedance rates for a given level of loss. It could be obtained for only one building, for a group of buildings or for the whole set of affected buildings. At last, for an assumed portfolio where are considered different combinations of types of buildings, types of soils and geographic location, the loss exceedance rates are calculated. The results show how estimated losses could be strongly influenced for the location and the kind of the structural system of the buildings.