Abstract: In order to study the seismic performance of the new precast reinforced concrete beam-concrete-filled steel tubular column assembly joints,finite element simulation was carried out on the above joints, and the influence of the concrete strength grade, different steel pipe strength, different reinforcement ratio and stirrup reinforcement ratio on the joints was further analyzed.The results show that the joint has good seismic performance. With the increase of concrete strength grade, the bearing capacity, ductility and energy consumption capacity of the joint increase, and the increase range is less than 3%.Considering the cost performance, it is suggested to adopt C30 concrete strength of the joint. With the increase of longitudinal reinforcement ratio, the bearing capacity, ductility and energy dissipation capacity of the joints are improved, but the stiffness degradation is slowed down. The effect of steel pipe strength grade above Q420 on seismic performance is obvious. As the stirrup diameter increases, the joint energy consumption and specimen ductility weaken. Therefore, it is recommended that the diameter of stirrup be 8mm.

Key words: round steel tube column, assembled beam, U-shaped steel plate-stud, finite element analysis, seismic performance

摘要： 为进一步研究新型预制钢筋混凝土梁—钢管混凝土柱装配节点抗震性能,对其进行有限元模拟,分析混凝土强度、钢管强度、纵筋配置和箍筋配置等参数的影响,结果表明该节点的抗震性能良好,而且,随混凝土强度的增加,节点的承载能力、延性、耗能能力有所增加,但增加幅度小于3%;提高梁纵筋配筋率,承载能力、延性和耗能能力均有所提高,刚度退化减慢;钢管强度等级Q420以上对抗震性能影响明显;箍筋直径越大,耗能和试件延性减弱。

关键词: 圆钢管柱, 装配梁, U形钢板-栓钉, 有限元分析, 抗震性能