In the present study, the tensile properties of naturally and artificially corroded steel rebars of different grades and diameter are experimentally investigated. Naturally corroded steel round rebars were acquired from 54-year-old inland corridor structure, exposed to carbonation and artificially corroded rebar were obtained by subjecting bare rebars to chloride attack through an impressed current based artificial corrosion. Mass losses were in the range of 0.81% to 79.64% for naturally corroded rebar and 9.95% to 50.51% for artificially corroded rebar. In the case of artificially corroded rebars, variations in rib loss with the level of corrosion were also captured. Effect of corrosion on elastic modulus, ductility, yield and ultimate stresses of naturally and artificially corroded rebar were studied. Based on the tensile test results, degradation equations were formulated to estimate the yield and ultimate stresses of corroded rebar knowing the properties of uncorroded rebar. Finally, proposed equations were validated with the results obtained from the literature study. The comparison revealed that the equations proposed in this study provide improved prediction of yield and ultimate stresses of corroded rebar.

在本研究中，对不同等级和直径的天然和人工腐蚀的钢筋的拉伸性能进行了实验研究。从具有54年历史的内陆走廊结构中获取天然腐蚀的钢制圆形钢筋，暴露于碳化中，然后通过对裸露的钢筋施加基于电流的人工腐蚀使氯化物受到腐蚀，从而获得人工腐蚀的钢筋。天然腐蚀钢筋的质量损失在0.81％至79.64％的范围内，而人工腐蚀钢筋的质量损失在9.95％至50.51％的范围内。对于人工腐蚀的钢筋，肋骨损失随腐蚀程度的变化也被捕获。研究了腐蚀对天然和人工腐蚀钢筋的弹性模量，延展性，屈服和极限应力的影响。根据拉伸试验结果，通过了解未腐蚀钢筋的性能，制定了退化方程，以估算腐蚀钢筋的屈服和极限应力。最后，从文献研究获得的结果验证了所提出的方程。比较表明，本研究中提出的方程式提供了对锈蚀钢筋的屈服和极限应力的改进预测。