Horizontal hoops in non-seismically designed beam-column joints

摘要

Tests on full-scale reinforced concrete exterior beam-column joints with non-seismic design under reversed cyclic loading were carried out. The seismic behaviour of these non-seismically designed beam-column joints was investigated, where the effects of horizontal hoops in joint on the seismic performance and the shear strength of the joints were emphasised. It is shown that the horizontal transverse reinforcement provided in the beam-column joints with non-seismic design improves effectively the seismic behaviour and enhances the joint shear strength. It is found that to provide horizontal hoops in non-seismically designed exterior joints with a hoop ratio of greater than 0.4% may have less effect on the enhancement of the shear strength of the joints. This hoop ratio may hence be considered as one of the design criteria of the non-seismically designed exterior beam-column joints.