Aplicación de la metodología de espectros de respuesta no lineales de aceleración-desplazamiento (ADRS) para diseño por desempeño de sistemas de aislación sísmica.

Abstract

The present work addresses the application of the Nonlinear Displacement-Acceleration Response Spectra (ADRS) methodology to optimize the selection of elastomeric and frictional isolator properties. This methodology allows a more accurate characterization of the behavior of seismic isolation systems, overcoming the limitations of traditional approaches based on effective stiffness and damping. The development of the project included the generation of ARDS spectra considering objective parameters such as friction coefficient (μ), radius of curvature (R), post creep stiffness (kd) and characteristic strength (Qd). Linear and nonlinear time-response analysis methods were employed, as well as normative target design spectra and seismic records scaled to the target spectrum in the frequency domain. Numerical methods were used to adjust parameters and ensure convergence of the results. The ADRS curves obtained show how the basal shear and displacement results vary according to the selected target properties and the type of analysis used (NLTH or MSA). It is observed that not all the properties used in this study comply with the recentering capacity established in the ASCE/SEI 7-22 standard. These ARDS curves show a way to obtain results in an accurate and agile way. Keywords: ADRS Spectra, Seismic Isolation systems, Elastomeric Systems, Frictional Systems.