以梁跨度、配筋率为参数,利用5组试件对比研究了界面凿毛对纤维增强聚合物(FRP)加固钢筋混凝土梁极限弯矩的影响。结果表明:混凝土界面凿毛后的FRP加固梁的极限弯矩要小于砂轮打磨梁的极限弯矩,并且随着梁跨度的增大,砂轮打磨梁与凿毛梁的极限弯矩差值增大;随着配筋率的增大,砂轮打磨梁与凿毛梁的极限弯矩差值减小。
Using a total of 5 group specimens,through two variables of span of beam and reinforcement ratio,the effect of the artificial chiseling on ultimate moment of reinforced concrete(RC) beams strengthened with fiber reinforced polymer(FRP) was investigated.The results show that the ultimate moment of an FRP strenghened beam with artificial chiseling is lower than that of an FRP strenghened beam with wheel grinding.Besides,as the span of beam increases,the difference values increase between the ultimate moment of a beam with artificial chiseling and that of a beam with wheel grinding;and the difference values decrease as the reinforcement ratios increase.