Abstract
This paper presents two types of simplified structures of reinforced concrete hinge isolated systems proposed by one of the authors. One is the splice-bar type which consists of main bars and splice bars of beams. The other is the joint-bar type which consists of joint bars fixing beams and beam-column connections, and main bars of beams. The main bars of the splice-bar type and the joint bars of the joint-bar type are un-bonded at the edge parts of beams. The seismic test results excluding those of the specimens with insufficient arrangement of lap splices of the joint-bar type verified the splendid performance of the two types of structures proposed in this paper: the specimens deformed mainly by the rotation due to the wide crack at the beam-ends without any severe damage in the beams.
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