Repairing seismic-damaged members is an important way to improve the seismic performance of seismic-damaged structures. To effectively improve the seismic performance of seismic-damaged members, this study adopted fiber-reinforced concrete (FRC) and carbon textile for repair. Considering the influences of repair methods, axial compression ratio, and pre-damage degree, six reinforced concrete (RC) columns were designed and manufactured to carry out experimental research. The experimental results showed that using FRC and carbon textile to repair damaged RC columns can improve their failure modes and significantly enhance their mechanical properties, crack resistance, and energy dissipation capacity; Moreover, the relevant displacement-strain curves, displacement-crack width curves, stiffness degradation curves, and damage evolution curves further demonstrated the effectiveness of using FRC and carbon textile for repair. Through theoretical analysis, this study established relevant calculation methods for flexural and shear bearing capacity, and proved the accuracy of the proposed theoretical calculation methods combined with the experimental data. Additionally, the influences of the height of the repaired area, the number of carbon textile layers, and the axial compression ratio on the seismic performance of repaired RC columns are revealed by numerical analysis. The above research can be helpful for the repair of actual seismic-damaged RC columns.

中文翻译：

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纤维增强混凝土和碳素织物修复的地震损伤RC柱性能增强分析


修复地震受损构件是提高地震受损结构抗震性能的重要途径。为有效提高地震受损构件的抗震性能，本研究采用纤维增强混凝土 （FRC） 和碳素织物进行修复。综合考虑修复方法、轴压比和预损伤程度的影响，设计制造了 6 根钢筋混凝土 （RC） 柱进行试验研究。实验结果表明，使用 FRC 和碳素织物修复受损的 RC 柱可以改善其失效模式，显著提高其力学性能、抗裂性和耗能能力;此外，相关的位移-应变曲线、位移-裂纹宽度曲线、刚度退化曲线和损伤演变曲线进一步证明了使用 FRC 和碳纺织品进行修复的有效性。通过理论分析，建立了相关的抗弯承载力和抗剪承载力计算方法，并结合实验数据证明了所提出的理论计算方法的准确性。此外，通过数值分析揭示了修复区域高度、碳纺织层数和轴压比对修复后 RC 柱抗震性能的影响。上述研究有助于修复实际地震损坏的 RC 柱。