采用三分点加载模式,对钢筋混凝土短梁进行疲劳实验.将受到不同次数疲劳作用的钢筋置于饱和Ca(OH)2溶液中,采用阶梯逐级添加的方式加入NaCl,通过测得的自腐蚀电位Ecorr和电化学阻抗技术测得的腐蚀电流密度Icorr判定钢筋锈蚀的氯离子临界浓度.结果表明:疲劳作用对混凝土中钢筋锈蚀有一定的加速促进作用,使氯离子临界浓度降低,疲劳作用后的钢筋更易发生锈蚀;随疲劳作用次数的增加,钢筋锈蚀的可能性增大,锈蚀速率加快.
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