SEISMIC PERFORMANCE EVALUATION OF LRB CONSIDERING MULLINS EFFECT AND HARDENING

Abstract

 In this research, non-linear model named Double-Target-Tri-Linear for LRB considering Mullins effect and Hardening is proposed based on the product inspection results at release. All bearings are made of ‘G10’ stiffness rubber, but shapes of the bearings are various. Parameters using in Double-Target-Tri-Linear model were evaluated from the results.
 And seismic performance of a single pier model of highway-bridge was compared using the proposed model with bi-linear model. From the calculated results, the effect of difference of each model was relatively large in the case that the pier deforms up to plastic range. Displacement of the LRB was reduced by considering Mullins effect and hardening, but response of the pier base tended to increase.