Evaluación de vulnerabilidad sísmica de edificaciones de estructuras metálicas en la parroquia Izamba zona 1, Ambato, Ecuador: Propuesta de reforzamiento estructural de una edificación representativa

Abstract

The city of Ambato has a high seismic hazard. For all the buildings that have been built and will be built are directly exposed to a high seismic risk. Therefore, it is necessary to perform a seismic vulnerability analysis of the structures and specifically those which have been built in areas with geological faults or that have been implemented in places where earthquakes have previously occurred and caused human or material losses. The Izamba parish is one of the areas with high seismic danger due to the previously mentioned factors. For this reason, it was necessary to evaluate the state in which the metal structure buildings were found in terms of the structural system they were built with, and the irregularities that were part of each building. The methodology carried out for the analysis was mixed, the FEMA P-154, NEC 15 and FUNVISIS rapid visual inspection forms used qualitative criteria to determine the degree of vulnerability of the buildings, while the detailed analysis with linear methods was quantitative. For the interpretation of the results, the NEC 15 and AISC 360 criteria were used because the buildings found in the area were of ordinary moment frames. A representative building in the area was selected to evaluate in detail the seismic vulnerability. In this case, a linear static and spectral modal analysis was performed. Subsequently, a structural reinforcement system was proposed and its efficiency was verified by means of the static and modal spectral analysis and the seismic-resistant design criteria established by the current regulations in force. Finally, computational tools were used for the structural calculation and verification of the proposed design.