Análisis estático no lineal (Push Over) de los talleres de la Facultad de Ingeniería Civil y Mecánica y de la Facultad de Ingeniería en Sistemas Electrónica e Industrial, con aisladores sísmicos, ubicadas en el campus Huachi de la Universidad Técnica de Ambato

Abstract

This research work presents a comparative analysis of the structural behavior of a conventional structure and another with the implementation of seismic isolators, which are devices that allow the building to deform elastically and dissipate energy during the occurrence of earthquakes of considerable magnitude. The structures analyzed were the workshops of the faculties of: Civil and Mechanical Engineering and Systems, Electronics and Industrial Engineering and they are classified as special according to the Ecuadorian Construction Standard (NEC 2015), and present a structural system of special earthquake resistant gantries made of hot rolled steel with stiffening diagonals, they are also used as laboratories for the production area and as a higher education center.xxiii As a first study, a linear analysis of the structures was performed to verify their current state by analyzing their vibration period, displacements and permissible drifts, then a non-linear static analysis was performed to determine their seismic performance, and then the isolation system was pre-dimensioned. It was designed taking as a priority the ASCE/SEI 7-10 standard, the dead loads of the building plus 30 percent of the live load above the isolation system and based on the information provided by the manufacturer. It should be taken into account that there are a large number of options of anti-seismic devices to improve the performance and behavior of a structure; in this case study, the lead core elastomeric isolator (LRB) was chosen. Subsequently, all the established limits such as drifts, shear and displacements were verified, taking into account the provisions of the Ecuadorian Construction Standard. For the workshop of the Faculty of Civil and Mechanical Engineering with isolated base, the floor drifts were reduced by 64 percent compared to the structure without isolation, for the basal shear and horizontal displacements a reduction of 73 and 51 percent respectively, likewise for the workshop of the Faculty of Systems, Electronics and Industrial Engineering the floor drifts, shear and displacement were reduced by 69, 74 and 63 percent respectively.