THE INVESTIGATION BASE ISOLATOR IN CONTROLLING THE RESPONSE OF THE STRUCTURES DURING EARTHQUAKES

Abstract

Base isolation systems are among the most successful and widely applied methods of mitigating
structural vibration and damage during seismic events. These systems have been installed in numerous
full-scale structures all around. There are three principal types of base isolators: Lead Rubber Bearing
(LRB), High Damping Rubber Bearing (HDRB), and Friction Pendulum System (FPS). It is necessary
to extensively examine the response of different LRB isolators—by combining them with re-centering
and damping properties for isolated steel frame buildings experiencing several NF ground motions. The
present research uses comparative-descriptive methodology and application in terms of objectives. The
data needed for the study were collected using library references and through reviewing related studies
conducted in the past in the same field.
Results of the current comparative investigation indicated significant reductions in the storey drift,
shear, and acceleration and increment in the storey displacement. According to the findings of the
current study, base isolators provide flexibility to massive structures against earthquakes. These
structures are situated on rigid soils. Moreover, base isolation was found to be the most effective in
controlling the response of the structures during earthquakes. Finally, shear, storey drift, and storey
displacement reduce due to the use of base isolators as compared to the fixed-base structure.