针对既有建筑结构改造工程实践中大量运用的钢筋混凝土梁柱后锚固结构,进行抗震性能试验研究。试件设计按照1∶2的比例综合考虑了框架顶层中节点接柱、边节点接柱接梁、中间层边节点接梁和中节点一次整浇几种工况;同时还考虑了直接植入主筋、增设附加筋加强和箍板焊接主筋加强几种后锚固方法。通过对不同节点处梁柱的裂缝情况、破坏形态、延性、耗能能力和刚度退化等规律的研究,得出一些结论。在接柱改造时,只要符合强柱弱梁、强节点弱构件和植筋深度的要求,节点承载力就不会因接柱而降低,若接柱时加固了节点,反而会提高结构整体的延性。在接梁时应注重结构的整体性,做到两边新旧梁加固的统一。 Aiming at the post-anchorage structure of reinforced concrete beam and column, which is extensively used in the practice of existing building structural remodeling engineering, the seismic performance test is carried out. According to the ratio of 1: 2, the design of the specimen is considered in the following three aspects: one is joint pouring, the other is side jointing, Additional reinforcement to strengthen and hoop welding main reinforcement several kinds of post-anchor method. Through the research on the law of cracks, failure modes, ductility, energy dissipation capacity and stiffness degradation of beam and column at different nodes, some conclusions are drawn. When the connection post is rebuilt, as long as it meets the requirements of strong column weak beam, strong node weak component and planting depth, the bearing capacity of the node will not be reduced due to the connection post. If the node is strengthened, the whole structure will be increased Ductility. In the beam should pay attention to the integrity of the structure, so that both sides of the new reinforcement of the old uniform.