Análisis de la influencia de disipadores de energía en la respuesta modal de estructuras aporticadas de hormigón armado

Abstract

The permanent threat that the country suffers from seismic events marks the importance that must be had in the analysis and design of buildings, it is therefore important to consider the regulations that govern the country to achieve that the buildings reach a resistant earthquake performance that achieves guarantee the good state of the patrimony and the security of the citizens; One of the most widely used seismic protection systems in the country are energy dissipators, which contribute to the improvement of the dynamic response in an efficient manner. The purpose of this work is supported by the numerous studies carried out in the country on this subject, where they study the behavior of structures with energy dissipating elements, leaving a noticeable need to explore this field. For this reason it was thought to analyze the influence of these elements in vulnerable buildings, for this a visual inspection of both public and private buildings was carried out and the properties of the object of study were determined. A four-level reinforced concrete building was modeled where the structural elements were defined, these were aligned so that there was a stiffness concentration at a point distant from the mass concentration; Immediately afterwards, the structural properties of the building were determined, such as its stiffness matrix and mass matrix in floor coordinates, in order to obtain modal responses such as period, frequency and mass participation in each vibration mode; subsequently the stiffness matrix is calculated and the structure is subjected to a synthetic earthquake which has an amplitude of 1.41g; through a step-by-step analysis in time using the Newmark beta method, maximum displacements, velocities and accelerations were determined on each floor of the structure within the elastic range, where it was verified that the floor drifts were greater than the 2% established in NEC 2015 regulations. These results were corroborated with the use of structural analysis software, in which an error was obtained within an acceptable margin of less than 5%.