Assessment of concrete damage and strength degradation caused by reinforcement corrosion

11th International Conference on Damage Assessment of Structures

物理学;材料科学

Nepal, Jaya^1 ; Chen, Hua-Peng^1

Department of Civil Engineering, University of Greenwich, Chatham Maritime, Kent

ME4 4TB, United Kingdom^1

关键词: Mechanical characteristics;    Reinforcement corrosion;    Stochastic deterioration;    Strength deterioration;    Structural performance;    Structural reliability;    Time dependent reliability;    Time dependent reliability analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/628/1/012050/pdf
DOI  :  10.1088/1742-6596/628/1/012050

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Structural performance deterioration of reinforced concrete structures has been extensively investigated, but very limited studies have been carried out to investigate the effect of reinforcement corrosion on time-dependent reliability with consideration of the influence of mechanical characteristics of the bond interface due to corrosion. This paper deals with how corrosion in reinforcement creates different types of defects in concrete structure and how they are responsible for the structural capacity deterioration of corrosion affected reinforced concrete structures during their service life. Cracking in cover concrete due to reinforcement corrosion is investigated by using rebar-concrete model and realistic concrete properties. The flexural strength deterioration is analytically predicted on the basis of bond strength evolution due to reinforcement corrosion, which is examined by the experimental data available. The time-dependent reliability analysis is undertaken to calculate the life time structural reliability of corrosion damaged concrete structures by stochastic deterioration modelling of reinforced concrete. The results from the numerical example show that the proposed approach is capable of evaluating the damage caused by reinforcement corrosion and also predicting the structural reliability of concrete structures during their lifecycle.