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.
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