AFRP加固钢筋混凝土梁的界面粘结剪应力

分析了粘贴芳纶纤维布加固钢筋混凝土梁纤维与混凝土间剥离破坏的机理和导致这种破坏的主要原因,并且通过芳纶纤维布加固钢筋混凝土梁的静载试验结果,拟合出了纤维应变的分布曲线,找出了芳纶纤维布与钢筋混凝土梁之间的界面粘结剪应力的分布规律及影响界面粘结剪应力大小的因素,提出了避免剥离破坏的有效措施,可供实际工程参考.

Study of Interfacial Bonding Shear Stress in AFRP-Strengthened Reinforced Concrete Beams

The early flexure failure model of the reinforced concrete beam strengthened with aramid fiber reinforced plastic(AFRP) was proposed.The failure mechanism was analyzed and the reasons that lead to this type of failure was provided.At the same time,based on the test results for flexural performance of reinforced concrete beam strengthened by externally bonding AFRP,the fit curve of the distribution of the strain of the fiber is obtained and the distribution of the interfacial bonding shear stress between the reinforced concrete beam and the fiber is analyzed.The factors that influent on the interfacial bonding shear stress are proposed.The measures that can help to avoid the early failure of the strengthened beam for the reality projects are also put forward.