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Research Article | Open Access

Behavioral characteristics of RC beams with non-uniform corrosion along the reinforcement

Xiaoxu Zhu( )Hiroyuki AbeDaiske HayashiHirokazu Tanaka
Institute of Technology, Shimizu Corporation, Tokyo 135-8530, Japan
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Abstract

This study investigated the behavior of a non-corroded reinforced concrete (RC) beam and two RC beams with non-uniform corrosion (whole span and side span) in a four-point bending test. The corrosion distributions of the tensile steel rebars were measured by two methods: diameter loss and mass loss. The peak values of corrosion distribution in the diameter-loss measurements were much greater than those in the mass-loss measurements. However, the average corrosion according to the diameter measurements was smaller than that in the mass-loss measurements. The corrosion distribution trends were the same in the two methods, indicating good measurement accuracy. From the bending test results, it appears that increasing corrosion area and corrosion ratios reduce the beams’ stiffness, yielding capacity, and ultimate capacity. All three specimens had similar failure patterns: steel yielding followed by compression failure of the concrete. A nonlinear three-dimensional (3D) analysis model that considered the non-uniform corrosion of the rebars was established and verified by experimental data. The model’s predictions for stiffness, ultimate capacity, and failure patterns were consistent with experimental results. The spatial variability factor (R'), which is the ratio of the maximum corrosion ratio (γmax) to the average corrosion ratio (γave), was adopted to quantify the non-uniformity of the corrosion distribution in this study.

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Journal of Intelligent Construction
Article number: 9180019
Cite this article:
Zhu X, Abe H, Hayashi D, et al. Behavioral characteristics of RC beams with non-uniform corrosion along the reinforcement. Journal of Intelligent Construction, 2023, 1(3): 9180019. https://doi.org/10.26599/JIC.2023.9180019

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Received: 01 August 2023
Revised: 14 August 2023
Accepted: 15 August 2023
Published: 21 September 2023
© The Author(s) 2023. Published by Tsinghua University Press.

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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