DEVELOPMENT OF STRENGTHENING METHODS USING ANGLES AS SHEAR-KEYS

Abstract

In seismic retrofitting of existing R/C buildings, indirect connection by post-installed anchors is used for the load transfer mechanism between existing building frames and steel braces or extension R/C walls. A new seismic strengthening method was developed using angles as shear-keys.
In the indirect connection between the structural frame of existing buildings and earthquake resistance elements, shear force is carried by angles as shear-keys. Seismic performance of the frame strengthened by angles as shear-keys in the indirect connection was investigated experimentally. Based on the experimental results, the developed method was verified to be efficient for strengthening existing building frames.