Abstract:In order to solve the problem of construction joint simulation in numerical calculation of reinforced concrete structure, according to the existing research, a suitable model was chose based on the formation and stress features of construction joint. Related research of fiber model, the average of shear effect in peripheral region of construction joint, as well as normal and tangential mechanical properties were comprehensively considered in the model. By using the OpenSees software, numerical calculation of pseudo static tests on four columns with construction joint and two plane frames was performed and the modeling flow was proposed. The test results of maximum load and the law of force-displacement hysteretic curves and the calculated results showed: the construction joint model could simulate the shrinkage phenomenon due to shear slide along construction joint face and the far steel barslip. The test results are in close agreement with the calculated results, thus confirming the rationality and validity of the construction joint model.