Análisis dinámico espectral de una estructura aporticada de concreto con énfasis en el análisis matricial considerando requisitos de la nec.

Abstract

Ecuador is considered one of the countries with a high risk of seismic hazard, which is why it is essential to analyze the dynamics of buildings. The objective of this work is to execute a Spectral Dynamic Analysis of a concrete framed structure with emphasis on matrix analysis considering the requirements of the Ecuadorian Construction Standard, NEC. The case study is a classroom block of an educational center in the City of Machala, where a modal analysis was carried out to determine the vibration modes, frequencies, periods, and influence on the total dynamics to then continue with a spectral analysis aa from a response spectrum in accelerations established by the characteristics of the site. As a result of the analysis, it was obtained that the design of the elements and changes in their inertia, included in modifications of the stiffness matrix, is weighted by the control of the fundamental period, T=0.53 s, with respect to the approximate period by 30%. Higher, 1.3T=0.54s, stipulated in the Ecuadorian Construction Standard.