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Efficiency of CFRP strips as a substitute for carbon steel stirrups in RC columns

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Abstract

It has been shown that the corrosion of the reinforcing bar can significantly affect the strength and ductility of concrete structures. This study proposed the use of CFRP strips as a substitute for carbon steel stirrups in RC columns to decrease the effects of corrosion. An experimental program comprising of four columns was employed to investigate the cyclic response of RC columns transversely reinforced by CFRP strips. All columns had similar material properties and reinforcement ratios, but their transverse reinforcements were different. The obtained results showed that the RC columns transversely reinforced by CFRP strips had a larger ultimate load and effective yield strength when compared with the reference column that was transversely reinforced by carbon steel. Besides, the stiffness degradation rate of CFRP confined columns was slower, and they were able to dissipate more energy when compared with the reference column. The columns confined with CFRP strips also exhibited a slightly larger displacement ductility ratio.

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Acknowledgements

The authors would like to thank the provided supports by Universiti Teknologi Malayisa (UTM) specially UTM’s structural lab technicians.

Funding

This study was financially support from the Ministry of Higher Education of Malaysia through the RUG votes of 16J24 and 4L705.

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Authors and Affiliations

  1. Faculty of Engineering, School of Civil Engineering, Universiti Teknologi Malaysia, Skudai, Malaysia

    Nur Hajarul Falahi Abdul Halim & Mohammadreza Vafaei

  2. School of Civil Engineering, Institute of Noise and Vibration, Universiti Teknologi Malaysia, Skudai, Malaysia

    Sophia C. Alih

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  1. Nur Hajarul Falahi Abdul Halim
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  2. Sophia C. Alih
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  3. Mohammadreza Vafaei
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Correspondence to Mohammadreza Vafaei.

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Abdul Halim, N.H.F., C. Alih, S. & Vafaei, M. Efficiency of CFRP strips as a substitute for carbon steel stirrups in RC columns. Mater Struct 53, 129 (2020). https://doi.org/10.1617/s11527-020-01566-w

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