ESTIMATION METHOD OF HORIZONTAL CAPACITY OF JOINT FRACTURE FOR RETROFITTED FRAME USING DISK SHEAR-KEY

Study on shear-key consisted of steel disk and anchor bolt for seismic retrofitting

Abstract

We developed the new joint element called “disk shear-key” for seismic retrofitting. This joint element is consisted of steel disk and anchor bolt. We had tested to clear the basic structural performance by direct shear test. Retrofitting members are connected to existing frame through indirect-joints generally. In this paper, the joint loading test and the frame loading test are conducted to investigate structural performance of disk shear-key put in indirect-joints. As a result, it is found that the horizontal load-capacity of frame is estimated by adding shear strength of column, punching shear strength and shear strength of disk shear-key constructed by the joint loading test results.