Evaluación de la vulnerabilidad sísmica, análisis estructural y diseño del reforzamiento de una vivienda de tres pisos ubicada en el norte de Quito - Ecuador

Abstract

This tecnical Project describes the stages followed in order to determine the adequate structural reinforcement of a house with informal construction characteristics, located in the north of Quito. This building´s configuration contains a structural system consisting of flat slabs, band beams and columns, the reinforced concrete frame are filled with unreinforced block masonry. Through a field survey and laboratory tests the properties of the materials are defined and the vulnerability of the structure is determined; by following the process described in the ASCE 41-17 (Seismic Evaluation and Retrofit of Existing Buildings) standard, the structural analysis of the elements is performed which allows pathologies that the structure presents to be identified. In addition, the non-linear analysis is carried out using the PUSHOVER technique, determining the reinforced concrete frame that contributes to the largest modal participation and considering it as a macro-model, the diagonal strut method is used for simulate the behavior of the masonry, obtaining as a result the capacity curve and the performance point of the structure. Finally, this work proposes the “enchape de mampostería” as the best alternative for reinforcement, following a technical and economic analysis, improving the performance of the structure and treating the minimum intervention, seeking to prevail the cost- benefit ratio.