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Durability of Reinforced Concrete Structures under Coupling Action of Load and Chlorine Erosion

Yang Li1,*, Dongwei Yang1, Jiangkun Zhang1
School of Civil Engineering and Environment, Hubei University of Technology, Wuhan, Hubei, 430068, China.
* Corresponding author: Yang Li. Email: .

Structural Durability & Health Monitoring 2018, 12(1), 51-63. https://doi.org/10.3970/sdhm.2018.012.051

Abstract

Diffusion behavior of chloride ion in reinforced concrete under bending moment was studied by taking the ratio of bending moment to ultimate flexural capacity as load level indicator. The function relationship between load level and chloride ion diffusion coefficient was established, based on that the limit state equation of the chloride ion critical concentration and chloride ion concentration on surface of the steel bar was established. Then by applying Monte-Carlo method the corrosion probability of reinforcement under different load levels in splash zone was calculated. Calculation results demonstrated that compared with the durability reliability index considering loading effect, the reliability index without considering loading effect could be 100% higher. In consideration of requirement for concrete durability, some revision suggestion was put forward. It was recommended that for beam members with different design life in splash zone, the corresponding minimum cover thickness should be adjusted properly as well as water-cement ratio limit.

Keywords

Concrete durability, reliability index, coupling effect, chloride ion diffusion.

Cite This Article

Li, Y., Yang, D., Zhang, J. (2018). Durability of Reinforced Concrete Structures under Coupling Action of Load and Chlorine Erosion. Structural Durability & Health Monitoring, 12(1), 51–63.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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