INVESTIGATION ON REDUCTION METHOD OF SEISMIC RESPONSE IN PC GIRDER BRIDGE WITH 2 SPANS CONSIDERING POUNDING EFFECT AND SEISMIC ISOLATION RUBBER

Abstract

In the seismic design specified in JSHB, the PC girder bridge with the abutment is recommended to have a sufficient expansion joint gap to avoid the collision behavior between girder-end and parapet against level 2 earthquake motion. However, ensuring the large gap size at the expansion joint is uneconomical design to increase cost of construction and seismic reinforcement. This paper presents the result of seismic response analysis with 3D-FEM considering the pounding effect. As a result, it was recognized that the damage of the abutment and the pier at the pounding were clarified. Furthermore, a hybrid reduction methods of seismic response by the isolated pier with seismic isolation rubber were discussed.