Connection Method using Connection Element Having High Shear Strength and Stiffness for Seismic Retrofitting

Abstract

The authors have developed a new shear key for seismic retrofitting that combines a steel disk(a cylindrically shaped member used to transfer shear force by placing it at the joint surface)and anchor bolts. This joint element has a mechanism for the transfer of shear force from the existing building frame to the reinforcing members through the bearing stress between the existing concrete and the disk. The authors have demonstrated that this new shear key experimentally offers high shear strength and stiffness with a shallow embedding depth compared to ordinary post-installed anchors. This paper gives an overview of this connection method.