Good elastic is maintained in the beginning and then the pinching appears more and more obvious as the displacement increases. The inverted S shaped of hysteresis curves dumps gradually to the displacement axis and the stiffness is smaller and smaller. When the four specimens load to the ultimate load of J0, conspicuous yield plateau appears and ultimate displacement of column tip is significantly
increased, which indicates good ductile performance of the joint reinforced by BFRP. The beam gets away from the joint and meanwhile the concrete of the column is loss of capacity, which shows the failure is the mode of strong beam and weak column.