Review of resistance decay of corroded reinforced
concrete structures (Ⅰ): material level
1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. Department of Architecture and Civil Engineering, Xingtai Polytechnic College, Xingtai, Hebei 054035, China
Abstract： To discuss the complexity and diversity of affecting factors on the resistance decay of corroded reinforced concrete members, the relevant research literatures were reviewed from three aspects of the mechanical properties of corroded steel bars, the concrete section damage based on corrosion expansion cracking and the bonding properties between corroded steel bars and concrete. The mechanical properties calculation models of corroded steel bars and bond property models between corroded steel bars and concrete were compared and analyzed. The shortcomings of current research and the research direction were pointed out. The results show that the existing decay models on the level of materials mostly depend on the empirical regression of finite experiments, and the model universality still needs to be improved. The exploration of the corrosion formation and damage evolution of reinforcing bars from the micro or even micro point of view is still the research directions to be further explored to establish the unified degradation model of material properties after corrosion. The existing studies have not paid enough attention to the deterioration of concrete performance. The establishment of correlation model between aging concrete performance and time is helpful to improve the prediction accuracy of residual life of structures.
2019, Vol. 40 
