Low Cycle Fatigue by Shear Load of Rubber Material for Base Isolation

Abstract

The low cycle fatigue of rubber material for the component of laminating rubber of seismic isolation is studied using cylinder specimen. The specimen is laminated cylinder shape and the rubber disk was bonded to the metal disk at both circular planes by vulcanization. It is applies shear loads during earthquake, however, when the rubber is applied tensile load in tall structure which aspect ratio is large, void nucleation may have occurred inside rubber. It is possible affect shear properties due to void. Low cycle fatigue examination to rubber disk with voids is performed. From the experiments, the rate of reduction of the maximum load of each cycle of rubber without void is larger than that of with void.