装配式RC梁柱塑性可控钢质节点抗震性能足尺试验研究

A plasticity controllable steel joint of prefabricated RC beam column is composed of steel joint module, upper and lower column module, beam module and damper module. Full-scale quasi-static loading test on such prefabricated joint and a full-scale cast-in-place(CIP) joint are conducted, and the corresponding ABAQUS finite element simulation is carried out. The seismic performance indicators of the prefabricated joints, such as bearing capacity, hysteretic energy dissipation, ductility and bearing capacity degradation, are studied. The experimental and simulation results show that compared with the CIP joint, the hysteretic curves of the prefabricated joint are plumper with improved energy dissipation capacity, better ductility and slower load bearing capacity degradation. The ultimate bearing capacity of the prefabricated joint is lower than that of the CIP joint, such that concrete damage can be effectively controlled, concrete bending failure of the beam-end can be avoided, and a 'plasticity controllable' beam-end can be realized. The finite element model can accurately predict the bearing capacity and deformation capacity of the proposed prefabricated joints.