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Deflection and cracking behavior of SFRSCC beams reinforced with hybrid prestressed GFRP and steel reinforcements
In the present work, the deflection and cracking behavior of I-shaped cross-sectional beams of Steel Fiber Reinforced Self-Compacting Concrete (SFRSCC) reinforced in flexure with hybrid prestressed steel strand and glass fiber reinforced polymer (GFRP) bars was investigated. Combining prestressed GFRP bars of relatively low elasticity modulus, but immune to corrosion (located with a small concrete cover), with prestressed steel strand (with higher concrete cover to avoid corrosion), a good balance in terms of reinforcement effectiveness, ductility, durability and cost competitiveness can be obtained. The steel strand aims also to assure the necessary flexural strengthening of the beams if GFRP bars become ineffective in case of fire occurrence. This work presents and discusses the results obtained from the experimental study of the beams tested in flexure under monotonic loading conditions. Additionally, the predictive performance of the available formulation in the design codes for the case of Fiber Reinforced Concrete (FRC) and FRP reinforced Concrete (FRP-RC) was assessed to be used for the proposed hybrid system. ; The first acknowledges the PhD grant SFRH/BD/77409/2011 provided by FCT (Fundação para a Ciência e a Tecnologia), while the third author acknowledges the research grant in the ambit of the project DURCOST - Innovation in reinforcing systems for sustainable pre-fabricated structures of higher durability and enhanced structural performance, PTDC/ECM/105700/2008. The research carried out in this paper was supported by DURCOST. The authors also thank the collaboration of the following companies: Sireg and Schoeck for providing the GFRP rebars, Casais to manufacture the moulds, Ibermetais for supplying the steel fibres, Secil/Unibetão for providing the Cement, and BASF for supplying the superplasticizer.
Deflection and cracking behavior of SFRSCC beams reinforced with hybrid prestressed GFRP and steel reinforcements
In the present work, the deflection and cracking behavior of I-shaped cross-sectional beams of Steel Fiber Reinforced Self-Compacting Concrete (SFRSCC) reinforced in flexure with hybrid prestressed steel strand and glass fiber reinforced polymer (GFRP) bars was investigated. Combining prestressed GFRP bars of relatively low elasticity modulus, but immune to corrosion (located with a small concrete cover), with prestressed steel strand (with higher concrete cover to avoid corrosion), a good balance in terms of reinforcement effectiveness, ductility, durability and cost competitiveness can be obtained. The steel strand aims also to assure the necessary flexural strengthening of the beams if GFRP bars become ineffective in case of fire occurrence. This work presents and discusses the results obtained from the experimental study of the beams tested in flexure under monotonic loading conditions. Additionally, the predictive performance of the available formulation in the design codes for the case of Fiber Reinforced Concrete (FRC) and FRP reinforced Concrete (FRP-RC) was assessed to be used for the proposed hybrid system. ; The first acknowledges the PhD grant SFRH/BD/77409/2011 provided by FCT (Fundação para a Ciência e a Tecnologia), while the third author acknowledges the research grant in the ambit of the project DURCOST - Innovation in reinforcing systems for sustainable pre-fabricated structures of higher durability and enhanced structural performance, PTDC/ECM/105700/2008. The research carried out in this paper was supported by DURCOST. The authors also thank the collaboration of the following companies: Sireg and Schoeck for providing the GFRP rebars, Casais to manufacture the moulds, Ibermetais for supplying the steel fibres, Secil/Unibetão for providing the Cement, and BASF for supplying the superplasticizer.
Deflection and cracking behavior of SFRSCC beams reinforced with hybrid prestressed GFRP and steel reinforcements
Mazaheripour, Hadi (author) / Barros, Joaquim A. O. (author) / Soltanzadeh, Fatemeh (author) / Sena-Cruz, José (author)
2016-10-01
doi:10.1016/j.engstruct.2016.07.026
Article (Journal)
Electronic Resource
English
DDC:
690
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