Flexural Behaviour of Reinforced Fibrous Concrete Beams: Experiments and Analytical Modelling
Abstract
Flexural behaviour of reinforced fibrous concrete beams was investigated in this research study. Two types of metallic fibers were studied: amorphous metallic fibers (FibraFlex fibers), and carbon steel hooked-end fibers (Dramix fibers). Four types of reinforced concretes were made: one control (without fibers) and three fibrous. Among three reinforced fibrous concretes, two contained fibers in mono form and one contained fibers in hybrid form. The total quantity of fibers in mono and hybrid forms was 20 kg/m3 and 40 kg/m3 , respectively. Three point bending tests were performed according to European standards “NF EN 14651” on beams of 150 x 150 mm cross section and length of 550 mm. The results showed that due to positive synergetic interaction between the two metallic fibers used, reinforced fibrous concrete (RFC) beams containing fibers in hybrid form exhibited better response at all loading stages. Analytical model to predict ultimate moment capacity of the RFC beam of rectangular section was developed and is presented in this paper. Analytical results for ultimate moment were found to be in good agreement with experimental results.References
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Ramzi B. Abdul-Ahad, Omer Qarani Aziz. 1999, Flexural strength of reinforced concrete T-beams with steel fibers, Cement & Concrete Composites. 21, 263-268.
Hsu, L.S., Hsu, T. 1994, Stress strain behaviour of steel-fiber high-strength concrete under compression, ACI Structural Journal. 91, 448-457.
Oh, B.H. 1992, Flexural analysis of reinforced concrete beams containing steel fibers, Journal of structural engineering. 118, 2821-2826.
ACI Committee 544.4R-88, Design consideration for steel fiber reinforced concrete,
Henager, C.N., Doherty, T.J. 1976, Analysis of reinforced fibrous concrete beams, journal of structural division, ASCE. 102, 177-188.
Dancygier, A.N., Savir, Z. 2006, Flexural behaviour of HSFRC with low reinforcement ratios, Engineering structures. 28, 1503-1512.
Turatsinze, A., Bascoul, A. 1996, Restrained crack widening in Mode I crack propagation for mortar and concrete, Advanced cement based materials. 4, 77-92.
R.Hameed, A. Turatsinze, F. Duprat and A. Sellier. 2010, A study on the reinforced fibrous concrete elements subjected to uniaxial tensile loading, KSCE Journal of Civil Engineering. 14, 547-556
Swamy, R. N., Sa’ad A. Al-Ta’an: 1981, Deformation and ultimate strength in flexure of reinforced concrete beams made with steel fiber concrete, ACI Journal, SeptemberOctober, 395-404.
Ashour, S.A., Mahmood, K., Wafa, F. 1997, Influence of steel fibers and compression reinforcement on deflection of high-strength concrete beams, ACI Structural Journal. 94, 611-624.
Vandewalle, L. 2000, Cracking behaviour of concrete beams reinforced with a combination of ordinary reinforcement and steel fibers, Material and Structures. 33, 164-170.
Banthia, N., Soleimani, S.M. 2005, Flexural response of hybrid fiber-reinforced cementitious composites, ACI Materials journal. 102, 382-389.
Pons, G., Mouret, M., Alcantrara, M., Granju. 2007, J.L., Mechanical behaviour of selfcompacting concrete with hybrid fiber reinforcement, Materials and Structures. 40, 201-210
Hsie, M., Tu, C., Song, P.S. 2008, Mechanical properties of polypropylene hybrid fiberreinforced concrete, Materials Science and Engineering A. 494, 153-157.
Ahmed S.F.U., Maalej M. 2009, Tensile strain hardening behaviour of hybrid steelpolyethylene fiber reinforced cementitious composites, Construction and Building Materials. 23, 96-106.
Barragam, B., Gettu, R., Zalochi, R.F., Martim, M.A., Agullo, L. 2000, A comparative study of the toughness of steel fiber reinforced concrete in tension, flexure and shear. Fiber reinforced concrete (FRC) BEFIB’ 2000, Proceedings of the fifth international RILEM symposium, 441-450.
EN 14651:2005+A1:2007, Test method for metallic fibre concrete - Measuring the flexural tensile strength (limit of proportionality (LOP), residual).
Campione, G. 2008, Simplified flexural response of steel fiber-reinforced concrete beams, journal of Materials in civil Engineering. 20, 283-293.
Ramzi B. Abdul-Ahad, Omer Qarani Aziz. 1999, Flexural strength of reinforced concrete T-beams with steel fibers, Cement & Concrete Composites. 21, 263-268.
Hsu, L.S., Hsu, T. 1994, Stress strain behaviour of steel-fiber high-strength concrete under compression, ACI Structural Journal. 91, 448-457.
Oh, B.H. 1992, Flexural analysis of reinforced concrete beams containing steel fibers, Journal of structural engineering. 118, 2821-2826.
ACI Committee 544.4R-88, Design consideration for steel fiber reinforced concrete,
Henager, C.N., Doherty, T.J. 1976, Analysis of reinforced fibrous concrete beams, journal of structural division, ASCE. 102, 177-188.
Dancygier, A.N., Savir, Z. 2006, Flexural behaviour of HSFRC with low reinforcement ratios, Engineering structures. 28, 1503-1512.
Turatsinze, A., Bascoul, A. 1996, Restrained crack widening in Mode I crack propagation for mortar and concrete, Advanced cement based materials. 4, 77-92.
R.Hameed, A. Turatsinze, F. Duprat and A. Sellier. 2010, A study on the reinforced fibrous concrete elements subjected to uniaxial tensile loading, KSCE Journal of Civil Engineering. 14, 547-556
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Published
2016-06-22
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Civil Engineering,Structures, Construction, Geo technology, Water, Transportation
