Steel fiber reinforced self-compacting concrete thin slabs – Experimental study and verification against Model Code 2010 provisions

Facconi, Luca; Minelli, Fausto; Plizzari, Giovanni

doi:10.1016/j.engstruct.2016.04.030

Cited by 32 publications

(16 citation statements)

References 13 publications

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“…Thus, when the displacements or the widths of cracks in the concretes are the same, the bearing capacity of steel fibre-reinforced concrete is higher than that of normal concrete. This is consistent with the results of Luca Facconi [17]. As shown in the load-deflection curve, after B1 and B2 crack, the slope of B2 is significantly smaller than that of B1, so the stiffness loss of B1 is significantly lower than that of B2.…”

Section: Stiffnesssupporting

confidence: 91%

“…Glass fibre [5], steel fibre [6][7][8][9][10][11], plastic fibre [12], carbon fibre [13,14], as well as others can be used as reinforcing material for concrete. Steel fibre has been studied as a kind of material enhancing the flexural strength of selfcompacting concrete sheets [15][16][17]. Foam concrete, which has many excellent properties including light weight and good thermal insulation, is widely used as a material of walls, roofs, and flooring [18].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study of Multi-Ribbed One-Way Composite Slabs Made of Steel Fibre, Foam, and Normal Concrete

Wang

Liu

Dou

et al. 2018

Archives of Civil Engineering

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This paper aims to study the effect of reinforcement configuration (steel fibre and rebar) on the mechanical performance of composite slabs of the same total steel contents. We manufactured four pieces of fullscale multi-ribbed composite prefabricated slabs with different reinforcement configurations by using steel fibrereinforced concrete, foam concrete, and normal concrete. The multi-ribbed composite prefabricated slab has many excellent properties, such as light weight, good thermal and sound insulation. Thus, it can be applied to fabricated structures. In addition, the composite prefabricated slabs with the same total steel contents but with different reinforcement configurations were studied under the same static load, and many technical indicators such as crack resistance capacity, yield load, ultimate load capacity, maximum deflection, destructive pattern, and stress of steel rebar were obtained. Results indicate reinforcement configuration has a significant effect on the mechanical performance of composite prefabricated slabs with the same total steel contents, and composite prefabricated slabs reinforced with longitudinal rebar and steel fibre (volume fraction is 1.5%) have the best mechanical performance and ductility.

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Section: Stiffnesssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Experimental Study of Multi-Ribbed One-Way Composite Slabs Made of Steel Fibre, Foam, and Normal Concrete

Wang

Liu

Dou

et al. 2018

Archives of Civil Engineering

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“…The greater number of yield lines needed for the formation of a failure mechanism, the higher would be the contribution of the fibres in the load carrying capacity of the structure [22]. Facconi et al [23] investigated a thin slab of 4200 9 2500 9 80 mm which was once reinforced with 91 kg/m 3 of rebars and once with an optimized combination of 43 kg/m 3 of rebars and 25 kg/m 3 of steel fibres (in total 68 kg/m 3 ). There was an opening in the slab and it was continuously supported on all sides.…”

Section: Introductionmentioning

confidence: 99%

Biaxial bending of SFRC slabs: Is conventional reinforcement necessary?

2018

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Fibre reinforced concrete shows enhanced performance in statistically redundant bi-dimensional structural elements that undergo biaxial bending. However, the lack of reinforcing rebars in fibre reinforced structural elements may affect the structural ductility which may further affect the overall load bearing capacity of these structures. To investigate the influence of fibres in such elements, six concrete plates of 2000 9 2000 9 150 mm reinforced with steel fibres and/or reinforcing rebars are tested under a central concentrated load. Two of the elements are reinforced with only 35 kg/m 3 of steel fibres, two are reinforced with 2-way conventional reinforcing rebars (35 kg/m 3 , in each direction) and two are reinforced with both steel fibres and rebars. The specimens are simply supported at the middle of each side by means of a bilateral restraint; the deflection response and cracking behaviour of all the specimens are recorded and compared. Moreover, the methodology introduced in the fib Model Code 2010 for design of steel fibre reinforced concrete is implemented to predict the ultimate load bearing capacity of these elements and its reliability is determined in comparison with the experimental values. The comparison of the behaviour of the specimens reinforced only with steel fibres, with those reinforced with steel rebars, shows the higher efficiency of steel fibres in terms of load carrying capacity, but with a lower ductility. The combination of steel fibres and rebars allows for a better exploitation of the capacity of both reinforcement solutions. Finally, the reliability of the approach implemented for the ultimate load prediction is shown and the need of rebars in providing ductility in fibre reinforced concrete members is underlined.

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“…Alternatively, steel fibers can be added to concrete in order to partially optimize and substitute conventional main steel reinforcement . Recently, the combination of steel fibers and conventional reinforcement bars is gaining popularity in several applications, being known under the name of hybrid RC 16‐23 …”

Section: Introductionmentioning

confidence: 99%

Influence of polypropylene fibers on the flexural behavior of reinforced concrete slabs with different opening shapes and sizes

Al-Rousan

2017

Structural Concrete

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Funding informationNone.The effect of polypropylene fibers (PF) on the flexural behavior of reinforced concrete one-way slabs with opening was investigated in this paper. The evaluated parameters included four different PF volume percentages (0, 0.3, 0.6, and 0.9%), with and without opening, two opening shapes (square and circular), and three opening sizes (100, 150, and 200 mm). Three groups of tested slabs were casted: without opening, with square opening, and circular opening, resulting in a total of 28 slabs. The behavior of each slab was evaluated in terms of the cracking load, ultimate capacity, initial and yielding stiffness, deflection ductility, and energy ductility. In addition, the steel and concrete strains, crack opening, and mode of failure were measured and monitored. The minimum design load capacities were calculated theoretically based on the sectional analysis and compared with the tested ones. The results showed that the use of PF at percentages greater than 0.6% significantly enhanced the performance parameters of the slabs with small opening size (2% opening ratio) and provided acceptable enhancement for slabs with large opening size (8% opening ratio). Therefore, the PF can be optimized to substitute the conventional steel reinforcement of slabs with small openings, especially circular openings. K E Y W O R D S flexural behavior, polypropylene fiber, reinforced concrete, sectional analysis, slab opening

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Steel fiber reinforced self-compacting concrete thin slabs – Experimental study and verification against Model Code 2010 provisions

Cited by 32 publications

References 13 publications

Experimental Study of Multi-Ribbed One-Way Composite Slabs Made of Steel Fibre, Foam, and Normal Concrete

Experimental Study of Multi-Ribbed One-Way Composite Slabs Made of Steel Fibre, Foam, and Normal Concrete

Biaxial bending of SFRC slabs: Is conventional reinforcement necessary?

Influence of polypropylene fibers on the flexural behavior of reinforced concrete slabs with different opening shapes and sizes

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