【摘要】 通过对8组24根碳纤维薄板增强钢筋混凝土梁进行三点弯曲试验,探讨碳纤维薄板增强钢筋混凝土缺口梁的破坏过程、极限承载力及其影响因子.研究结果表明:1)碳纤维薄板增强钢筋混凝土缺口梁总是沿着纤维薄板与混凝土的界面发生剥离破坏;2)与无增强梁相比,增强梁的极限承载力可以提高20%～40%.而且当纤维薄板贴长Lc与两支点间距离S之比为0.57左右时增强效果最明显;3)缺口对梁的破坏模式影响较大,而对梁的极限承载力影响不大(下降10%～15%).更多还原

【Abstract】 Some 3point bending experiments on carbon fibersheetreinforced (CFSR) RC beams with Vnotch were carried out, for studying the loadcarrying capacity and its influencing factor, and the fracture process of the beams. The main results show that: 1) the debonding fracture always happens along the interface between the carbon fibersheet (CFS) and concrete member of the reinforced RC beams; 2) the loadcarrying capacity of the CFSR RC beams increases by 20%40%, and during Lc=0.57S (where Lc is the length of CFS, and S is the distance between two fulcrums), the strengthening effect is most evident; 3) the Vnotch can influence greatly the fracture mode of the reinforced RC beams, but the influence on the loadcarrying capacity is less (decreasing 10%~15%).更多还原