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Effects of stirrup spacing on shear performance of hybrid composite beams produced by pultruded GFRP profile infilled with reinforced concrete

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Abstract

Pultruded Glass Fiber-Reinforced Polymer (pultruded GFRP) composite produced by the pultrusion method has become popular in civil engineering applications due to its lightness, corrosion resistance and high strength. However, the use of the pultruded profile combining with reinforced concrete is still limited due to a lack of knowledge. Therefore, the behavior of the pultruded GFRP profile infilled with reinforced concrete beams (hybrid beams) is investigated. This study focused on the effects of stirrup spacing for the hybrid beams. Pursuant to this goal, a total of eight different beams were tested under four-point loading. One reference beam without the pultruded profile and seven hybrid beams having different stirrup spacings were considered. Moreover, the hybrid beams with and without stirrups were wrapped by unidirectional GFRP composite to investigate the effects of stirrup spacing on shear capacity of the beams strengthened by GFRP composite. The experimental findings revealed that tightening stirrups increased the load and energy dissipation capacities of the hybrid beams; however, it could not prevent brittle failure. On the other hand, wrapping hybrid beams with GFRP composite increased the load and energy dissipation capacities and also prevented brittle failure regardless of the presence of the stirrups. Therefore, it is strongly recommended that the unidirectional pultruded profiles should be strengthened with 90° GFRP wrapping to have ductile behavior.

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Data availability

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

This study has been supported by the Department of Scientific Research Projects at Necmettin Erbakan University with the project coded 201219004. The opinions expressed in this paper are those of the authors and do not reflect the views of the sponsor.

Funding

Funding was received for this work. All of the sources of funding for the work described in this publication are acknowledged below: Department of Scientific Research Projects at Necmettin Erbakan University with the project coded 201219004.

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Authors and Affiliations

  1. Department of Civil Engineering, Necmettin Erbakan University, 42140, Konya, Turkey

    Yasin Onuralp Özkılıç & Emrah Madenci

  2. Meram Vocational School, Necmettin Erbakan University, 42000, Konya, Turkey

    Lokman Gemi

  3. Faculty of Engineering and Natural Sciences, Department of Civil Engineering, Konya Technical University, Konya, 42130, Turkey

    Ceyhun Aksoylu

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  1. Yasin Onuralp Özkılıç
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  4. Ceyhun Aksoylu
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Correspondence to Yasin Onuralp Özkılıç.

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Özkılıç, Y.O., Gemi, L., Madenci, E. et al. Effects of stirrup spacing on shear performance of hybrid composite beams produced by pultruded GFRP profile infilled with reinforced concrete. Archiv.Civ.Mech.Eng 23, 36 (2023). https://doi.org/10.1007/s43452-022-00576-5

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