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Influence of longitudinal bar corrosion on impact behavior of RC beams

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Abstract

To investigate the influence of longitudinal bar corrosion on impact behavior of RC beams, four RC beam specimens with varied corrosion rate were tested under falling-weight, impacting the specimens at the mid-span. Four corresponding specimens were also tested under static loads to determine their static properties and behavior. Reinforcement was corroded by means of immersing the specimens in 3 % sodium chloride solution and applying a current density of 3 mA/cm2. The test results indicate that corrosion of longitudinal bars decreases the impact force and reaction force, and increases mid-span displacement of RC beams under impact load and the beam’s capacity of absorbing energy. Corrosion-induced cracks in concrete have been shown as the most relevant damages in the tested beams. All specimens, regardless of their corrosion rate, failed in shear-critical mode and presented severe diagonal shear cracks under the impact point.

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Acknowledgments

The research described in this paper was financially supported by National Nature Science Foundation of China project (Grant No. 51578229).

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Authors and Affiliations

  1. College of Civil Engineering, Hunan University, Changsha, 410082, China

    Mingjiang Dai, Ou Yang & Yan Xiao

  2. School of Civil Environment Engineering, East China Institute of Technology, Fuzhou, China

    Fengchen Li

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  1. Mingjiang Dai
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  2. Ou Yang
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  3. Yan Xiao
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  4. Fengchen Li
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Correspondence to Ou Yang.

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Dai, M., Yang, O., Xiao, Y. et al. Influence of longitudinal bar corrosion on impact behavior of RC beams. Mater Struct 49, 3579–3589 (2016). https://doi.org/10.1617/s11527-015-0741-0

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  • DOI: https://doi.org/10.1617/s11527-015-0741-0

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