科研之友
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摘要
A literature review on the remaining cross-sectional area of corroded rebars have confirmed that the pitting corrosion rather than uniform is manifested to be the predominant configuration of rebars under the penetration of chlorides, which however can seriously reduce the serviceability of aging reinforced concrete (RC) structures subjected to chloride-induced corrosion, not only by the impairs of stress concentration on rebars because of sharply decreased area, but also the degradation of mechanical properties due to the effect of eccentric load and additional moment on reinforcement. Therefore, accurate prediction of characterizing the shape of the lost cross-sectional area of corrosion based on a reasonable configuration model is imperative for durability assessment and of significant practical importance. Considering the thorough investigation on growth and evolution characteristic of pits induced by chloride ingression, the distribution and feature of pits configuration on rebars under different corrosion rate has been studied and found the foundation of establishing the new combined pitting corrosion model in this paper. The application of 151 sets of test data collected from different experiments to the existing models demonstrates that the proposed model gives a better representation of the degradation law of remaining cross-sectional area of corroded rebars with the increase of pitting depth and hence verified.
- 出版日期2016
- 单位中南大学
