Experienced shear strain dependency of high damping rubber bearing which is induced by Mullins effect of rubber is one of influencial dependency to earthquake response. So the effect of experienced shear strain dependency on earthquake response of isolation structure should be evaluated. We carried out earthquake response loading tests. From these tests, we indicated that loading history must be taken into account. And then earthquake response analysis are performed by modified double target model which is able to take into account the experienced shear strain dependency. From earthquake response analysis, the effect of experienced shear strain dependency on earthquake response are evaluated.
