Análisis comparativo del desempeño sísmico de una estructura existente de hormigón armado en Riobamba antes y después de la implementación de disipadores de energía.

Abstract

This project focuses on the comparative analysis of the seismic behavior of moment-resisting frame structures designed in accordance with the requirements of Ecuador's seismic design regulations. The effectiveness of implementing different energy dissipation systems is evaluated, including frictional, buckling-restrained (BRB) and viscous dissipators. The implementation of these energy dissipation systems improves the seismic resilience of buildings in areas of high seismic vulnerability in Ecuador. During the development of the project, four structures were modeled using advanced nonlinear analysis software, applying various seismic records from Ecuador, Chile and the United States. The energy dissipation devices were designed and their properties were optimized by choosing efficient locations for the dissipators in the structure under study, complying with the NEC-15 regulations. Through the comparative analysis between the moment-resisting frame structure with shear walls and the seismic energy dissipation systems evaluated. It was found that frictional energy dissipators have a significant impact on several variables of the seismic behavior of the structure. In particular, a 10.2% reduction in displacements, 2.1% in drifts and 10.2% in shear was observed. These results indicate that frictional energy dissipators effectively contribute to the stability and safety of the structure in the event of seismic events. On the other hand, viscous energy dissipators reduced accelerations by 23.7% and permanent deformations by 45.7% as obtained through the seismic analysis of the structure. Keywords: Seismic Performance, Energy Dissipators, Nonlinear Analysis, Seismic-Resistant Engineering, Resilience.