The structural performance of beam reinforced with steel bars and glass fiber reinforced polymer bars subjected to static and static cyclic loads

Jansi Sheela  Sidhardhan; Murugan  Madaswamy

doi:10.7764/RDLC.24.1.100

Authors

Jansi Sheela Sidhardhan Department of Civil engineering, Government College of Engineering, Tirunelveli (India)
Murugan Madaswamy Department of Civil engineering, Government College of Engineering, Tirunelveli (India)

DOI:

https://doi.org/10.7764/RDLC.24.1.100

Keywords:

GFRP bar, conventional steel bar, static and static cyclic load, short term behaviour, stiffness.

Abstract

Glass fiber reinforced polymer (GFRP) bar has recently emerged as a viable alternative solution to conventional steel bars due to its stronger corrosion resistance and lightweight nature. The mechanical properties of the GFRP bar exhibits superior tensile strength than the steel bar. Hence, an experimental study was carried out on the beam specimen of size 1000 mm X 150 mm X 200 mm replacing the traditional steel bars with GFRP bars. The study focuses on the short-term behavior of beam specimens subjected to static and static cyclic loads. A comparative analysis was conducted between the beam with GFRP bars and traditional steel reinforcement and their moment resisting parameters such as deflection, load-carrying capacity, strain distribution, failure mode, ductility and deformability factor under static load were measured. Also, comparison studies discussed the stiffness and energy dissipation capacity under static cyclic loading. Results concluded that the beam with GFRP bars has 13% higher load-carrying capacity and 17% higher deflection than the conventional steel bars reinforced beam in static loading condition. In static cyclic loading condition, comparatively the beam with GFRP bars shows 15% higher load-carrying capacity and 21% higher deflection than the beam with steel reinforcement. A greater number of cracks appeared in the beam with GFRP reinforcement than the conventional steel reinforcement specimen. Overall, the results concluded the performance of the specimens with GFRP bars is superior to the conventional reinforcement in the concrete specimens.

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