Nonlinear static analysis (push over) with seismic isolators in the workshops of the Technical University of Ambato

Abstract

In this article, an analysis of the structural behavior of two structures with and without the use of seismic isolators is carried out. One structure is located in the workshop of the Faculty of Civil and Mechanical Engineering (FICM) while the other is in the workshop of the Faculty of Systems, Electronic and Industrial Engineering (FISEI), both belonging to the Technical University of Ambato. The structures have a structural system of special earthquake-resistant hot-rolled steel frames with stiffening diagonals. First, a methodological framework was created. Subsequently, for the analysis of structural behavior, the following are presented: the results of the fundamental period of vibration, validation of the dynamic analysis, floor drifts, nonlinear static analysis, capacity curve, performance point, characteristics of the elastomeric insulator with lead core, modeling in the ETABS engineering software, comparison of vibration period results, comparison of inelastic drifts, comparison of displacements, among others. It is concluded that, for the FICM workshop, the embedded structure presented a maximum displacement for a design earthquake of 1.162 cm, in the structure with a fixed base it was reduced by 50.76% with a displacement of 0.572 cm; while, for the FISEI workshop, the embedded structure presented a value of 1.294 cm, and with the implementation of insulators it is reduced by 63.49% with a value of 0.473 cm. Therefore, with the incorporation of seismic isolators, the structures have a greater energy dissipation capacity.