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Fatigue life of C-FRCM strengthened corroded RC continuous beams under multi-intervention system

Feng, Ran; Chen, Pi Yu; Wang, Fangying; Xu, Ying; Zhu, Ji Hua

Authors

Ran Feng

Pi Yu Chen

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FANGYING WANG Fangying.Wang@nottingham.ac.uk
Assistant Professor in Structural Engineering

Ying Xu

Ji Hua Zhu



Abstract

A new fatigue life prediction model for reinforced concrete (RC) beams is proposed. The model was applied to carbon-fabric reinforced cementitious matrix (C-FRCM) strengthened corroded RC beams under the impressed current cathodic protection (ICCP) and structural strengthening (SS) multi-intervention system. The stress development of steel bar in the fatigue process was captured by employing the fracture mechanics and finite element (FE) analysis. The concept of equivalent initial flaw size (EIFS) was also introduced to account for the actual initial micro crack size of steel bar. The feasibility of the model was validated through comparisons of the numerical deflection, the strain of steel bar and fatigue life of RC beams against the test results. The validated model was then used to examine the effects of key parameters including load level, corrosion degree of steel bar and polarization degree of C-FRCM. Furthermore, the results of the parametric study were used to fit S-N curve and analyse the reliability. The high accuracy of the model was shown to be suitable for the fatigue life prediction of ICCP-SS system in long-term service. It was also found that the fatigue life of the corroded RC beams was greatly improved through strengthening with C-FRCM.

Citation

Feng, R., Chen, P. Y., Wang, F., Xu, Y., & Zhu, J. H. (2022). Fatigue life of C-FRCM strengthened corroded RC continuous beams under multi-intervention system. Composite Structures, 290, Article 115512. https://doi.org/10.1016/j.compstruct.2022.115512

Journal Article Type Article
Acceptance Date Mar 21, 2022
Online Publication Date Apr 2, 2022
Publication Date Jun 15, 2022
Deposit Date Jun 4, 2022
Publicly Available Date Apr 3, 2023
Journal Composite Structures
Print ISSN 0263-8223
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 290
Article Number 115512
DOI https://doi.org/10.1016/j.compstruct.2022.115512
Keywords Civil and Structural Engineering; Ceramics and Composites
Public URL https://nottingham-repository.worktribe.com/output/7839894
Publisher URL https://www.sciencedirect.com/science/article/abs/pii/S0263822322003038?via%3Dihub

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