钢筋非均匀锈蚀轮廓线理论解

Theoretical Contour Line of Reinforcement Bar of Non-uniform Corrosion

基于金属腐蚀的电化学原理,结合钢筋混凝土结构中钢筋锈蚀的实际过程,从理论上推导了一般大气环境条件下钢筋的锈蚀速度以及不同服役时间,钢筋各部位的锈蚀深度及锈蚀后的体积变化规律,得到了钢筋非均匀锈蚀轮廓线的理论计算模型,并与相关文献模型及实测的数据进行对比分析,验证了其正确性。

Most of the previous studies on corrosion of the steel bar in reinforced concrete structures is based on the assumption that the bar is uniformly corroded. The actual measurement in projects proved that most of the reinforcement bar is in non-uniform corrosion state. Based on electrochemical principles of metal corrosion and combined with the real corrosion course of the bar in concrete structures, a theoretical model of the contour line of reinforcement bar due to non-uniform corrosion is established, through deducing the speed of corrosion and theoretical corrosion penetration and volume changes due to corrosion of reinforcement in general air at different position and different time. At the same time, the model is verified with the results from relative references and measured data.