Abstract
In this study, in order to investigate the effect of overburden depth on the reduction effect of sectional force of piers founded deep in the ground by using isolation bearings, we conducted dynamic analysis considering overburden depth, bearing structure as a parameter and evaluated the response plasticity rate and the degree of shear allowance of the body. As a result, under the analysis conditions of this study, the sectional forces of the body are effectively reduced by the isolation bearings when the overburden depth is less than about half of the height of the pier. On the other hand, when the most of body is buried in the ground, the effect of reducing the sectional force by using the isolation bearings decreases due to both the increase of the kinematic interaction effect caused by the large overburden depth and the decrease of the inertial interaction effect caused by the decrease of the ground surface acceleration.
