A study on flexural strength of beam reinforced with basalt fibre bars
23 Jul 2019-Vol. 2128, Iss: 1, pp 020015
TL;DR: In this article, the authors investigated the properties of basalt fiber reinforced polymer (BFRP) and STEEL bars and compared them with the codal provision in terms of crack, load, flexure and mode of failure.
Abstract: The advancement in fibre-reinforced polymer (FRP) innovation have a distinct fascination in executing another sort of strands named as basalt fibre reinforced polymer (BFRP), which has the dominating of being erosion safe, strong and cost effective that deliver a predominant outcome when applied in concrete structure. Besides, the accessible codal provision and aides does not give any suggestions to the use of Basalt bars since basic investigations and significant applications are as yet restricted. The objective of our investigation was progressed by two phases. The initial phase was led by examining the properties on BFRP and STEEL bars & these properties were evaluated and compared with the codal provision. The next phase of this test included testing of eight concrete beams (4 no’s of RC beam and 4 no’s of BFRP beam) of size 1700 mm long × 150 mm wide × 250 mm profound and to examine the flexural behaviour of both BFRP and RC beam under a two -point load over a clear span of 1550 mm until failure. The outcomes of these two phases were discussed in terms of its behaviour in crack, load, flexure and the mode of failure. Additionally, the test outcomes prove that the basalt bars have a great mechanical behaviour over concrete structures and it can be set as a substitution of STEEL bars for light, temporary structures.
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TL;DR: In this paper, the effect of the FRP reinforcement ratios and elastic modulus of FRP were incorporated in the exponent of Branson's equation to predict deflections and crack width.
Abstract: Concrete members reinforced with glass fiber-reinforced polymer (GFRP) bars exhibit large deflections and crack widths compared with concrete members reinforced with steel. This is due to the low modulus of elasticity of GFRP. Current design methods for predicting deflections at service load and crack widths developed for concrete structures reinforced with steel may not be used for concrete structures reinforced with GFRP. This paper presents methods for predicting deflections and crack widths in beams reinforced with GFRP. To use the effective moment of inertia for concrete beams reinforced with GFRP bars, the effect of the FRP reinforcement ratios and elastic modulus of FRP were incorporated in the exponent of Branson's equation. In addition, an equation based on flexural stiffness of GFRP reinforced concrete was developed to predict deflections. Based on this investigation and past studies, a theoretical correlation for predicting crack width was proposed. Six concrete beams reinforced with different GFRP reinforcement ratios were tested. Their measured deflections and crack widths were compared with the proposed models. The experimental results compared favorably with those predicted by the models.
227 citations
TL;DR: In this article, the authors presented some chosen results of pilot research on the series of simply supported beams under flexure, reinforced with BFRP bars, compared to the reference beams with steel reinforcement.
111 citations
DOI•
01 Oct 2005
TL;DR: In this article, a nonferrous hybrid reinforcement system for concrete bridge decks by using continuous fiber-reinforcedpolymer (FRP) rebars and discrete randomly distributed polypropylene fibers was developed.
Abstract: Synopsis: The main objective of this study was to develop a nonferrous hybrid reinforcement system for concrete bridge decks by using continuous fiber-reinforcedpolymer (FRP) rebars and discrete randomly distributed polypropylene fibers. This hybrid system has the potential to eliminate problems related to corrosion of steel reinforcement while providing requisite strength, stiffness, and desired ductility, which are shortcomings of the FRP reinforcement system in reinforced concrete structures.
56 citations
TL;DR: In this article, the authors present an experimental study of the flexural defections of concrete beam reinforced with basalt FRP bars and propose a modified equation to calculate the deflection of the FRP-RC beams.
Abstract: This paper presents an experimental study of the flexural defections of concrete beam reinforced with basalt FRP bars. Six concrete beams with different BFRP reinforcement ratio and one comparative beam reinforced with steel rebar are tested in laboratory. Numerical simulations using sectional analysis method and spatial FEM are performed. The experimental results can fit well with numerical simulation results. Analysis and experimental results in the literature collected indicate that the ACI-440.1R-06 equations underestimate the deflection of FRP-RC beams. Based on the experimental and numerical simulation results, a modified equation of the flexural rigidity is proposed to calculate the deflection of the FRP-RC beams. The proposed equation can fit better with the experimental results than the ACI-440.1R-06 equations.
43 citations