通过对碳纤维织物加固的预裂钢筋混凝土(RC)梁的三点弯曲试验,给出了其疲劳特征实验研究结果.RC梁(200 mm×150 mm×700 mm)被施加预载直到所产生的两裂缝的宽度之和为0.7 mm,然后用碳纤维织物进行抗弯和抗剪加固.碳纤维织物在裂缝处的联结作用,可使RC梁在静载和疲劳载荷作用下其裂缝宽度减小,且在碳纤维和钢筋间产生应力重分布.实验结果表明,通过碳纤维织物加固的预裂钢筋混凝土梁,其刚度、极限结构强度及极限疲劳强度都得到明显改善. The fatigue characteristics of RC beams strengthened with carbon fiber reinforced plastic (RC) beams were investigated by three-point bending test. The RC beam (200 mm × 150 mm × 700 mm) was preloaded until the resulting The sum of the widths of the two cracks is 0.7 mm, and then the carbon fiber fabric is used for the bending and shear reinforcement.The connection of the carbon fiber fabric at the crack can reduce the crack width of the RC beam under static and fatigue loads, And rebar stress distribution.The experimental results show that the stiffness, ultimate structural strength and ultimate fatigue strength of pre-split reinforced concrete beams strengthened by carbon fiber fabric have been significantly improved.