Experimental and finite element study on the lateral response of modified rectangular fiber-reinforced elastomeric isolators (MR-FREIs)

Document Type

Article

Publication Date

2-5-2015

Publication Title

Engineering Structures

Volume

85

First Page

293

Keywords

3D finite element analysis, Base isolation, Fiber-reinforced elastomeric isolator (FREI), Geometric modifications, Rubber bearing

Last Page

303

Abstract

Fiber-reinforced elastomeric isolators (FREIs) have been shown to be viable and potentially inexpensive devices for seismic mitigation of low-rise buildings. FREIs utilize fiber material for the reinforcing layers resulting in lower weight and manufacturing costs compared to conventional steel-reinforced elastomeric isolators (SREIs). Experimental test results have shown that modifying FREIs, by cutting holes in the center portion of the isolators or removing sections from the sides, can enhance their lateral response characteristics. This study investigates the lateral response of modified rectangular FREIs (MR-FREIs) through experimental tests and 3D finite element analysis. Experimental test results of five FREIs with and without modifications are used to evaluate the 3D finite element models. These models are subsequently used to investigate the effect of modifications on the lateral behavior of the isolators, in addition to the stress and strain demands in the elastomer and fiber reinforcement layers.

DOI

10.1016/j.engstruct.2014.11.037

ISSN

01410296

E-ISSN

1873-7323

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