Effect of lead rubber bearing on seismic response of regular and irregular frames in elevation

Base isolations are acknowledged as an effective seismic protective system for structural systems of buildings. This study investigates the effectiveness of lead rubber bearing (LRB) on the nonlinear response of the steel moment resisting frames subjected to real ground motions. To this aim, 12-stor...

Full description

Bibliographic Details
Main Authors: Esra Mete Güneyisi, Ahmet Hilmi Deringöl
Format: Article
Language:English
Published: Pamukkale University 2020-11-01
Series:Pamukkale University Journal of Engineering Sciences
Subjects:
Online Access:https://dergipark.org.tr/tr/pub/pajes/issue/57790/825502
Description
Summary:Base isolations are acknowledged as an effective seismic protective system for structural systems of buildings. This study investigates the effectiveness of lead rubber bearing (LRB) on the nonlinear response of the steel moment resisting frames subjected to real ground motions. To this aim, 12-storey regular and irregular steel frames in elevation upgraded with LRB were studied by evaluating the local and global deformations. LRB was modeled by considering three key parameters of isolation period, effective damping ratio, and stiffness ratio. Two-dimensional model of the base isolated frames were created and a series of time-history analyses were carried out by different earthquake ground motions. The seismic behaviour of the bare and isolated frames was measured by the variation of isolator displacement, acceleration, interstorey drift ratio, relative displacement, roof drift ratio, normalized base shear, base moment, and hysteretic curve. The supremacy of the base-isolated frames over the bare frames was discussed accordingly. It was found that the seismic response of the regular and irregular frames in elevation could be improved up to a certain degree by implementing LRB.
ISSN:1300-7009
2147-5881