卢海林¹，刘  勇²
(1 武汉工程大学，武汉430073; 2 泸州职业技术学院，泸州646005)

[摘要] 进行了2个采用碳纤维布(CFRP)加固的钢筋混凝土梁和1个对比梁的低周反复荷载试验。对试验构件
的破坏形态、承载力、滞回性能、延性系数和刚度退化等抗震性能进行了对比分析，结果表明采用CFRP加固后的RC梁比普通RC梁的滞回曲线更为丰满，梁延性系数也由普通RC梁的4.88分别提高到了5.3和6.0，极限承载力分别提高了16.7%和35.7%，采用CFRP加固后的RC梁破坏形态均为弯曲破坏，表现出良好的延性和耗能能力。同时在整个反复加载过程中，加固后的梁试件刚度退化较普通钢筋混凝土梁试件明显。
[关键词] CFRP；抗震性能；低周反复荷载试验；延性；耗能

    Experimental study on seismic performance of RC beams strengthened by CFRP
    Lu Hailin¹, Liu Yong²
    (1 Wuhan Institute of Technology, Wuhan 430073, China; 2 Luzhou Vocational and Technical College, Luzhou 646005, China)

Abstract: Two RC beams strengthened by CFRP and a contrast beam were tested under reversed cyclic loading to study the effect of seismic retrofit. The destruction of test components by shape, bearing capacity, hysteresis properties, ductility and stiffness degradation coefficient of seismic performance were analyzed and compared. The results show that the hysteresis curve of RC beam strengthened by CFRP is more plentiful than the ordinary RC beam, the ductility coefficient is increased from 4.88 0f the ordinary RC beam t0 5.3 and 6.0, the ultimate bearing capacity is enhanced 16.7% and 35.7% separately, the failure modes of RC beams strengthened with CFRP are bending damage, which shows a good ductility and energy dissipation. At the same time throughout the course of repeated loading, as compared with ordinary RC beam specimen, the stiffness degradation of RC beam with CFRP is more significant.
Keywords: CFRP; seisnuc performance; reversed cyclic loading test; ductility; energy dissipation