装配式RC梁柱塑性可控钢质节点抗震性能足尺试验研究

装配式RC梁柱塑性可控钢质节点由钢制节点模块、上下柱模块、梁模块以及阻尼器模块装配组成。通过对该装配式节点及现浇节点进行拟静力加载足尺试验，并采用ABAQUS软件进行有限元数值模拟，研究装配式节点承载力、滞回耗能、延性以及承载力退化等抗震性能指标。试验及有限元模拟结果表明：相较于现浇节点，装配式RC梁柱塑性可控钢质节点的滞回曲线更饱满，耗能能力更强，延性更好，承载能力退化更缓慢；该装配式节点的极限承载力低于现浇节点，但能有效控制混凝土损伤，避免梁端混凝土发生弯曲破坏，实现梁端“塑性可控”；建立的有限元模型可较准确地预测同种装配式节点的承载能力和变形能力。

Full-scale experimental study on seismic behaviors of plasticity controllable steel joint of prefabricated RC beam column

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.