The corrosion of steel rebars in reinforced concrete (RC) structures will lead to the deterioration of fatigue performance and fatigue life. For the sake of resolving the corrosion problems of RC structures, the Impressed Current Cathodic Protection (ICCP) and Structural Strengthening (SS) techniques are often applied to repair the corroded RC structures. In this study, the ICCP-SS techniques are combined to retrofit the deteriorated RC continuous beams by using the carbon-fabric reinforced cementitious matrix (C-FRCM), and the C-FRCM composites comprised of carbon fabric mesh and inorganic cementitious matrix will served as anodic material for ICCP and the structural strengthening material in the ICCP-SS multi-intervention system. By analyzing the test results of fatigue life, failure mode, cracks in concrete, mid-span deflection, tensile strain of steel rebars and internal force redistributions of the test beams under fatigue load, the influence of reinforcement corrosion and the ICCP-SS retrofitting method on the fatigue performance of RC continuous beams were discussed. The test results showed that the strengthening effect of C-FRCM composites can reduce the generation of cracks in concrete and improve the flexural rigidity as well as fatigue life of the continuous beams effectively, however, the improving effect will decrease for the specimens with higher circulated charge density along with a higher polarization effect of C-FRCM composites.

钢筋混凝土（RC）结构中钢筋的腐蚀会导致疲劳性能和疲劳寿命下降。为了解决钢筋混凝土结构的腐蚀问题，经常应用外加电流阴极保护（ICCP）和结构加强（SS）技术来修复腐蚀的钢筋混凝土结构。在这项研究中，通过使用碳纤维增强水泥基（C-FRCM），将ICCP-SS技术结合起来，对劣化的RC连续梁进行了改造，并且可以使用由碳纤维网和无机水泥基组成的C-FRCM复合材料。作为ICCP的阳极材料和ICCP-SS多重干预系统中的结构加强材料。通过分析疲劳寿命，破坏模式，混凝土裂缝，中跨挠度的测试结果，讨论了疲劳载荷下钢筋的拉伸应变和试验梁的内力重分布，钢筋腐蚀和ICCP-SS改造方法对钢筋混凝土连续梁疲劳性能的影响。试验结果表明，C-FRCM复合材料的增强作用可以减少混凝土中裂纹的产生，并有效地改善了连续梁的抗弯刚度和疲劳寿命，但是对于循环次数较高的试样，其改善效果会有所降低。电荷密度以及C-FRCM复合材料的更高极化效应。