Colapso sísmico basado en energía para edificios aporticados de concreto armado equipados con amortiguadores viscosos, Lima 2024

• Autor: Toledo Espinoza, Vlacev
• Formato: artículo
• Fecha de Publicación: 2024
• Institución: Universidad Nacional Federico Villarreal
• Repositorio: Revistas - Universidad Nacional Federico Villarreal
• Lenguaje: español
• OAI Identifier: oai:ojs2.revistas.unfv.edu.pe:article/1816
• Enlace del recurso: https://revistas.unfv.edu.pe/RCV/article/view/1816
• Nivel de acceso: acceso abierto
• Materia: seismic energy dissipation; viscous dampers; collapse margin ratio; incremental dynamic analysis; energía sísmica disipada; amortiguadores viscosos; índice de margen al colapso; análisis dinámico incremental

The study investigates the behavior of reinforced concrete buildings with moment-resisting frames equipped with dampers, utilizing potential energy to numerically monitor the onset of collapse. IDA curves are employed to obtain the collapse margin ratio (CMR) as the primary indicator of seismic performance, following the FEMA P695 methodology. Several representative frames of 3, 6, and 9-story buildings were analyzed, with varying levels of supplemental damping (ξV1 of 5%, 10%, 20%, 30%, and 40%) and both linear and nonlinear dampers (α equal to 1.0, 0.7, 0.5, and 0.3). The research approach was quantitative and applied, utilizing a quasi-experimental design. It was found that the collapse capacity of buildings varies depending on the structural system characteristics and the properties of the dampers. In buildings with dampers, the CMR increased by 1.08 to 2.46 times compared to prototypes without dampers. Increased damping ensures a rise in CMR, although nonlinear dampers do not produce the same effect. The study also observed that CMR trends correlate with the dependent variable indicators, allowing for the derivation of equations to predict seismic performance at collapse, considering the initial supplemental damping, velocity exponent, and mass.