Análisis de vulnerabilidad sísmica de marcos especiales a momento en edificaciones irregulares

Abstract

This degree project focuses on the structural design in reinforced concrete of a five-story building composed of special moment-resisting frames. For its evaluation, the FEMA P-154 methodology was applied, both in its international version and as adapted to the Ecuadorian Building Code (NEC-2015). Each structural model underwent seismic checks and various types of analysis: linear static, dynamic, and nonlinear, with the aim of assessing ductility capacity and performance level under different seismic hazard scenarios. As part of the nonlinear analysis, plastic hinges were incorporated into the most critical structural elements, and nonlinear lateral and gravitational loads were applied. The results show that as the number of stories increases, so do the ductility and overstrength of the structure. The pushover curve allowed for evaluating the maximum capacity of each model and understanding its behavior under seismic action. It is concluded that the structure can withstand frequent and occasional earthquakes without compromising its stability. However, its performance becomes limited when subjected to rare or very rare seismic events. Overall, structures designed under the parameters of the Ecuadorian code show better seismic performance due to its stricter design requirements.