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通过5个自密实混凝土加固框架中节点和1个整浇的对比框架节点进行二次受力下自密实混凝土框架节点的拟静力试验,研究不同界面处理对自密实混凝土加固节点抗震性能的影响。5个加固试件的界面分别采用了凿毛法、刻槽法、凿毛加刻槽法以及凿毛加植筋法等4种方法进行处理。通过对试件破坏过程、新老钢筋应变、荷载位移滞回曲线等试验结果的分析得到:4种界面处理方法均能使自密实混凝土与老混凝土具有较好的协同工作性能,而采用凿毛法与刻槽法相结合或凿毛法与植筋法相结合的加固节点其极限承载力、极限位移、位移延性系数等较单独采用凿毛处理或刻槽处理的效果明显提高,而极限承载力已接近整浇对比试件。
The pseudo-static tests of self-compacting concrete frame joints subjected to secondary loading were carried out through five nodes in self-compacting concrete frame and one integral-poured frame, and the influence of different interface treatment on the seismic performance of self-compacting concrete . The interface of the five reinforcement specimens were processed by four methods: chisel method, notch method, chiseling plus notch method, chiseling and planting method. Through the analysis of the failure process of the specimen, the strain of old and new steel bars and the curve of load-displacement hysteresis, the results show that the four interfacial treatment methods can make the self-compacting concrete and the old concrete have good interoperability, The ultimate bearing capacity, ultimate displacement, displacement ductility coefficient of the reinforced joints combined with the notch method or chisel method and planting method are obviously improved compared with the chiseling or grooved treatment alone, and the ultimate bearing capacity Close to the whole pouring contrast test pieces.