Abstract
Two hysteretic models for reproducing restoring forces of laminated rubber bearings are proposed. One is including only hardening effects in large deformation range and the other is modeling experienced shear strain dependency in addition to the hardening effect. Tangent modulus of those models are also derived. The key point of those models is that they are extended directly from bilinear hysteretic model, and the restoring forces of them could be computed easily by using the bilinear model. Then, their accuracy in predicting seismic responses is evaluated. From the seismic response analysis, it is found that modeling of the hardening and the experienced shear strain dependency are important factors in order to accurately predict responses of the piers and bearings in base-isolation bridges.
