STUDY ON INCREMENT OF SEISMIC RESPONSE DUE TO CHANGE OF CHARACTERISTIC OF LRB AND OVER STRENGTH OF RC PIER

Abstract

 As the characteristic of Isolation bearing using for bridges changes according to various factors, the seismic behavior sometimes occurs different from the behavior expected in design. In this paper, we studied the influence gotten by the reduction of bearing stiffness due to dependence factors and investigated the effect derived by hardening characteristic of rubber bearing. Furthermore, we researched the influence to LRB induced by the over strength of RC pier. As a result, the share deformation ratio of LRB is apt to approach to the crash share deformation ratio, but we certified that it was reduced by hardening characteristic in high share deformation range. On the other hand, the over strength of RC pier doesn't influence so much to seismic behavior of LRB which pier yields a little in seismic design.