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Computers and Concrete Volume 15, Number 2, February 2015 , pages 183-198 DOI: https://doi.org/10.12989/cac.2015...183 |
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Influence of flexural loading on chloride ingress in concrete subjected to cyclic drying-wetting condition |
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Hailong Ye Chuanqing Fu, Nanguo Jin and Xianyu Jin
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| Abstract | ||
| Chloride ingress implies a complex interaction between physical and chemical process, in which heat, moisture and chloride ions transport through concrete cover. Meanwhile, reinforced concrete structure itself undergoes evolution due to variation in temperature, relative humidity and creep effects, which can potentially change the deformation and trigger some micro-cracks in concrete. In addition, all of these process show time-dependent performance with complex interaction between structures and environments. In the present work, a time-dependent behavior of chloride transport in reinforced concrete beam subjected to flexural load is proposed based on the well-known section fiber model. The strain state varies because of stress redistribution caused by the interaction between environment and structure, mainly dominated by thermal stresses and shrinkage stress and creep. Finally, in order to clear the influence of strain state on the chloride diffusivity, experiment test were carried out and a power function used to describe this influence is proposed. | ||
| Key Words | ||
| concrete structure; chloride ingress; section fiber model; strain state; external loadings | ||
| Address | ||
| Hailong Ye Chuanqing Fu, Nanguo Jin and Xianyu Jin: Department of Civil Engineering, Zhejiang University, 388 Yuhangtang Road, Hangzhou 310058, China Nanguo Jin: College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou, 310014, China Xianyu Jin: Department of Civil Engineering, Zhejiang University, 388 Yuhangtang Road, Hangzhou 310058, China | ||