The magnesium phosphate cement (MPC)-carbon fiber reinforced plastics (CFRP) strengthening and electrochemical chloride extraction (ECE) integration experiment was carried out for reinforced concrete beams corroded by sodium chloride. Then the bending performance of the reinforced concrete beams was analyzed by test and numerical simulation. The reinforced concrete beams of the control group were energized to accelerate corrosion until the theoretical corrosion rate of the steel bars reached 10%. The second group of the beams were strengthened, and the other three groups of the beams were strengthened and the inside chloride was removed by electrochemistry method with different dechlorination current densities. The bending test results showed that the bending bearing capacity of the strengthened concrete beam increased by 18.22%. The bending bearing capacity of the strengthened and dechlorinated beam increased by 15.11%, 13.25% and 9.76%, respectively. The chloride ion content at the interface between steel bar and concrete reduced by 68.68%–82.64%. In addition, the numerical simulation method of “standard cube test block-central pull out test block-reinforced concrete beam” was proposed. A 3D mesoscopic finite element plastic damage model of the reinforced concrete beams strengthened by MPC-CFRP was established. The numerical results were in good agreement with the experimental results.

对氯化钠腐蚀的钢筋混凝土梁进行了磷酸镁水泥（MPC）-碳纤维增强塑料（CFRP）的强化和电化学氯化物萃取（ECE）的整合实验。然后通过试验和数值模拟分析了钢筋混凝土梁的抗弯性能。给对照组的钢筋混凝土梁通电以加速腐蚀，直到钢筋的理论腐蚀率达到10％。第二组束被加强，其他三组束被加强并且通过电化学方法以不同的脱氯电流密度去除内部的氯化物。弯曲试验结果表明，钢筋混凝土梁的弯曲承载力提高了18.22％。加固和脱氯梁的抗弯承载力分别增加了15.11％，13.25％和9.76％。钢筋和混凝土之间的界面上的氯离子含量降低了68.68％–82.64％。另外，提出了“标准立方体试验块-中央拉拔试验块-钢筋混凝土梁”的数值模拟方法。建立了MPC-CFRP加固钢筋混凝土梁的3D介观有限元塑性损伤模型。数值结果与实验结果吻合良好。提出了“标准立方试验块-中央拉拔试验块-钢筋混凝土梁”的数值模拟方法。建立了MPC-CFRP加固钢筋混凝土梁的3D介观有限元塑性损伤模型。数值结果与实验结果吻合良好。提出了“标准立方试验块-中央拉拔试验块-钢筋混凝土梁”的数值模拟方法。建立了MPC-CFRP加固钢筋混凝土梁的3D介观有限元塑性损伤模型。数值结果与实验结果吻合良好。