Researches on properties of laminated elastomeric bearings under cyclic loading

Abstract

It is important to clarify the test protocol for the rubber bearing and the evaluation method of the limit state based on the test. More than 100 laminated rubber bearings manufactured recently in Japan were tested under the cyclic loading. It is found that the ultimate shear strain varies widely from 160% to 450% with dependence on the secondary shape factor of the rubber bearings. An effect of rupture mode in the rubber bearing on the ultimate shear strain should be also studied, to improve the reliability of the design shear strain limit.