A comparative study between the flexural behaviour of high-strength steel fiber concrete beams reinforced with glass fibre reinforced polymer (GFRP) and steel bars

Sasikumar  P.

doi:10.7764/RDLC.25.1.30

Authors

Sasikumar P. K. Ramakrishnan College of Technology, Anna University, Tamil Nadu (India)

DOI:

https://doi.org/10.7764/RDLC.25.1.30

Keywords:

High-strength concrete, steel fibre, proposed method, ductility, energy absorption capacity.

Abstract

Glass fibre reinforced polymer (GFRP) rebar is an alternative material to traditional rebar. GFRP rebar exhibits superior ductility and corrosion resistance compared to steel reinforcement. This study investigated the flexural behaviour of eight GFRP- and steel-reinforced concrete beams with dimensions of 150mm x 200mm x 2500mm, subjected to two-point loading. The flexural behaviour of RC beams reinforced with High-Strength Concrete (HSC) was investigated. The control and optimum average cube compressive strengths are 81.64 MPa and 83.42 MPa, respectively. Both steel and GFRP RC beams were examined, with the addition of 0.6% steel fibre. The main objectives of this study encompassed the specimens' load-carrying capacity, failure mode, ductility, stiffness, and energy absorption capacity. Notably, GFRP RC beams demonstrated superior load-carrying capacity and ductility compared to steel RC beams. Additionally, the mid-span deflection of the RC beams was evaluated using two codes: ACI 440.1R and CSA S806. Furthermore, proposed a method to predict mid-span deflection, and our experimental results closely aligned with the predictions.

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