| The beam end displacement of beam-column subassemblage may be looked as the superposition of three parts deformation that column deformation, beam deformation, and joint deformation. Where, joint deformation contain slip of longitudinal reinforcement passing through joint and shear deformation of joint.Based on behavior of joint core under cyclic reversal load, according to actual measurement load-displacement hysteresis loops, slip of longitudinal reinforcement passing through joint and shear deformation of joint in a serial of beam-column subassemblage tests, the typical slip hysteresis model of longitudinal reinforcement passing through joint and typical shear deformation hysteresis model of joint are proposed in this paper. Three factors, that beam reinforcement relative diameter, concrete intensity, axial compression ratio are considered in the model of slip of longitudinal reinforcement passing through joint, and the correlation between shear deformation and cycle number are simulated Four factors that concrete intensity, axial compression ratio, shear compression ratio, hoop reinforcement characteristic number are considered in the model of joint shear deformation, and the correlation between joint shear deformation and cycle number are also simulated.The beam end displacement due to beam and column deformation may be calculated by existing cantilever program and then converted by geometric relation. Considering the joint core deformation effect, the existing cantilever program was assembled with the slip deformation model of longitudinal reinforcement passing through joint and the shear deformation model of joint to obtain the program for simulation of hysteretic characteristics of beam-column subassemblage. By comparing with test results, the new program is proved to have the capacity of simulating successfully the joint's seismic behavior.
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