Diseño y simulación de un aislador sísmico de elastómero para edificios en estructura metálica de hasta 4 pisos

Abstract

The objective of this research is the numerical analysis of an HDLRB seismic isolator with four lead cores to determine the advantages that a building with this isolation system would present. The insulator was subjected to shear-compression determining the appearance of cracks between the elastomer union and the steel plates when it is subjected to a displacement of 128 mm, effective stiffness values of 290072 kg / m were also obtained, effective damping of the 17.5% and yield point of 11670 kg / m. In the study of the structure, the floor drifts and maximum accelerations were chosen as factors to be analyzed. Regarding the mezzanine drifts, a maximum value of 40.4 mm was obtained for the building without insulation and 3.57 mm for the building with seismic isolator, the latter presenting a maximum base displacement of 116.1 mm. The seismically isolated structure presented maximum floor acceleration values between 0.094 and 0.162 m / s², reducing the acceleration observed in the uninsulated building from 2.6 to 18.6 times, where values between 0.245 and 3.02 m / s² were identified.