【摘要】 为探究碳纤维增强复合材料(carbon fiber reinforced polymer, CFRP)布加固对锈蚀钢筋混凝土(reinforced concrete, RC)矩形柱抗震性能的影响，设计并制作了7根RC矩形柱试件，其中6根采用贴面外加电流法进行加速锈蚀。锈蚀完成后，对3根锈蚀柱进行CFRP布加固。通过拟静力试验，分析得到了各试件的破坏形态、滞回曲线、骨架曲线、位移延性、刚度退化曲线、累计耗能曲线、等效黏滞阻尼系数、曲率分布、位移组成及有效刚度。结果表明：钢筋锈蚀显著降低了试件的抗震性能，当锈蚀率达到15.09%时，试件的峰值荷载、位移延性系数和耗能能力分别降低了37.5%、14.2%和32.8%;而CFRP布加固能有效提高锈蚀试件的抗震性能，与未加固锈蚀试件C1、C2和C3相比，加固后的试件C1R、C2R和C3R的峰值荷载分别提高11.57%、4.97%和13.32%,延性系数分别提高7.0%、7.2%和12.2%,总累计耗能分别提高112.10%、91.35%和166.12%;随着锈蚀率的增加，试件的有效刚度呈现逐渐下降的趋势。为此，提出了一个适用于预测锈蚀RC矩形柱有效刚度的公式，其计算结果贴合试验值，具有较高的精度和较小的离散性。更多还原

【Abstract】 Here, to investigate effects of carbon fiber reinforced polymer(CFRP) cloth reinforcement on aseismic performance of corroded reinforced con-crete(RC) rectangular columns, 7 RC rectangular column specimens were designed and fabricated, accelerated corrosion was conducted for 6 specimens using the external-current-surface coating method. After corrosion was completed, 3 corroded columns were reinforced with CFRP cloth. Through quasi-static tests, failure mode, hysteresis curve, skeleton curve, displacement ductility, stiffness degradation curve, cumulative energy dissipation curve, equivalent viscous damping coefficient, curvature distribution, displacement composition and effective stiffness of 7 specimens were analyzed. The results showed that corrosions of steel bars significantly reduce aseismic performance of 7 specimens, when corrosion rate reaches 15.09%, peak load, displacement ductility coefficient and energy dissipation capacity of specimens decrease by 37.5%, 14.2% and 32.8%, respectively; CFRP cloth reinforcement can effectively improve aseismic performance of corroded specimens, compared with unreinforced corroded specimens C1, C2 and C3, peak loads of reinforced specimens C1R, C2R and C3R increase by 11.57%, 4.97% and 13.32%, respectively, their ductility coefficients increase by 7.0%, 7.2% and 12.2%, respectively, their total cumulative energy dissipation increase by 112.10%, 91.35% and 166.12%, respectively; with increase in corrosion rate, effective stiffness of specimens exhibit a gradually decreasing trend. Finally, a formula suitable for predicting effective stiffness of corroded RC rectangular columns was proposed, it was shown that its calculated results are consistent with test values, and have higher accuracy and smaller discreteness.更多还原