High strength fiber reinforced beams under impact load

Pérez, Fabián Fiengo; Luccioni, Bibiana; Vivas, Juan Carlos; Isla, Facundo; Sfer, Domingo

doi:10.1016/j.ijimpeng.2021.104039

Cited by 9 publications

(7 citation statements)

References 45 publications

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“…Initially, the micro-cracks were formed in the specimens and increasing the number of impacts turned the micro-cracks into multiple micro- and macro-cracks [ 41 , 42 ]. The uniformly distributed fibres also improved bridging and reinforcing effects and high cohesion between fibre and matrix, transferring stress from the crack tip to the top specimen surface [ 6 ]. Adding fibres increases the micro- and macro-cracks while also increasing the enormous impact energy [ 30 ].…”

Section: Resultsmentioning

confidence: 99%

“…As a result, the frequency and probability of these effects become significantly more substantial. Hence, evaluating concrete’s impact load performance is critical for creating a secure and cost-effective structure [ 6 , 7 ]. A lack of tensile strength, flexibility, and impact energy mean that non-fibrous concrete cannot resist successive impacts [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

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Impact Strength of Preplaced Aggregate Concrete Comprising Glass Fibre Mesh and Steel Fibres: Experiments and Modeling

Ponnambalam¹,

Thangavel²,

Murali

et al. 2022

Materials

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Concrete is the most widely used and most affordable construction material. The structural damage that concrete cracks and fractures may cause can be severe. These concerns have lately been alleviated by new developments in fibre concretes. Recent advancements in fibrous concrete and its evolution have been rapidly drawing researchers’ attentions worldwide, which motivates the development of a new type of composite with superior impact resistance. Preplaced aggregate fibrous concrete (PAFC) is a revolutionary composite comprising a higher dosage of fibres. It has outstanding impact resistance that surpasses those of traditional fibrous concrete. The impact behaviour of PAFC in addition to glass fibre mesh (GFM) has not been investigated thoroughly. To fill this research gap, this study investigates the impact performance of three-layered PAFC comprising steel fibres and GFM insertion. Eight different mixtures were prepared and can be divided into two groups. In the first group, specimens were made with 4% fibres and two single, double and triple layers of GFM insertion between the three-layered concrete. The second group of specimens was reinforced with 5, 2 and 5% steel fibres at the top, middle and bottom layers, respectively. However, the GFM insertion scheme for the second group was the same as the first. Rectangular specimens of size 500 × 100 × 100 mm were cast and tested against drop weight impact. The parameters studied were cracking impact numbers, failure impact number, ductility index and failure patterns. In addition, an analytical model was used to evaluate the impact failure energies. Results indicate that the combined action of steel fibre and GFM exhibited an excellent impact resistance. Increasing the number of GFM insertions between the specimen layer led to increased impact strength. The dose of the fibres utilized in the outer layer of the PAFC was increased, resulting in the material having a higher impact resistance. The cracking impact numbers improved from 28 to 40%, and failure impact numbers ranged from 58.8 to 92.2% when the GFM insertion numbers increased from one to three.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact Strength of Preplaced Aggregate Concrete Comprising Glass Fibre Mesh and Steel Fibres: Experiments and Modeling

Ponnambalam¹,

Thangavel²,

Murali

et al. 2022

Materials

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“…A comparison with 143 impact tests indicated that the proposed approach accurately forecasts the maximum midspan displacement of RC beams under shock loads. In 2022, P´erez et al [5] evaluated RC beams with varied amounts of steel fibers. Falling mass with various projectile impact velocities were used under impact loads.…”

Section: Introductionmentioning

confidence: 99%

Residual strength capacity of reinforced reactive powder concrete two-way slabs subjected to drop weight

Majeed

Sayhood

Mohammed

2023

QJES

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This paper presents an experimental investigation of the effect of the impact force on the residual strength capacity of simply supported reactive powder slabs. Eight specimens of reinforced reactive powder concrete slabs with dimensions of 500 x 500 mm and 70 mm in four categories were used. The influences of slab compressive strength (conventional concrete and reactive powder concrete), steel fiber proportion (1, 1.5, and 2%), percentage of reinforcement in the tension zone (ρ1=0.007, ρ2=0.011, ρ3=0.0179), and the number of impacts (two impacts, four impacts, and six impacts) were all investigated in this test. Investigations were carried out to ascertain each slab's residual response, including first cracking load, residual failure load, residual steel reinforcement strain, maximum central deflection, and crack pattern. The results showed that using reactive powder concrete instead of normal concrete increased the mechanical properties of concrete and resulted in a significant increase in failure load. In addition, the central deflection and strain increased. Increasing the reinforcement ratio increased the failure load while simultaneously decreasing the deflection due to the improvement in slab moment resistance. Furthermore, it was discovered through experiments that the addition of steel fiber to the mixture enhanced the slab’s post-cracking reactivity. The presence of steel fiber raised the slab strength resistance by 21.63% as the steel fiber ratio increased from 1% to 2%. This is because the addition of steel fiber increased the slab's tension resistance.

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“…Although terrorist attacks have escalated in recent decades, impact analysis has become critical to guarantee that buildings are secure. Impact loading scenarios include the influence of falling items on industrial flooring [ 2 ], impacts from a ship or ice collisions on the seafloor and offshore structures [ 3 ], accidents involving vehicles and bridges or structures [ 4 ] and nuclear containment facilities that are affected by airplanes and missiles [ 5 ]. As a result of the confined and transitory nature of impact loading, structural elements exposed to it may react differently from those under a static load.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Analytical Modeling of Flexural Impact Strength of Preplaced Aggregate Fibrous Concrete Beams

2022

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Preplaced aggregate fibrous concrete (PAFC) is a revolutionary kind of concrete composite that is gaining popularity and attracting the interest of academics from across the world. PAFC is a uniquely designed concrete prepared by stacking and packing premixed fibers and coarse aggregate in a steel mold. The gaps between the fibers and aggregates are subsequently filled by injecting a cement grout with high flowability. This study investigates the impact performance of three different sizes of PAFC beams. Steel and polypropylene fibers were used in a 3% dosage to make three different beam sizes, measuring 550 × 150 × 150 mm, 400 × 100 × 100 mm, and 250 × 50 × 50 mm. According to ACI Committee 544, all beams were subjected to a drop weight flexural impact test. Compressive strength, impact energies at initial crack and failure, ductility index, and failure mode were evaluated. Additionally, analytical modeling was used to compute the failure impact energy for the fibrous beams. The results showed that the addition of fibers increased the capacity of the tested beams to absorb greater flexural impact energy. Compared to polypropylene fibers, steel fibers had better crack propagation and opening resistance because of their higher tensile strength and crimped and hooked end configuration. For all large-size beams, the analysis of the percentage increase in impact energy at the failure stages was found to be 5.3 to 14.6 times higher than the impact energy at cracking.

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High strength fiber reinforced beams under impact load

Cited by 9 publications

References 45 publications

Impact Strength of Preplaced Aggregate Concrete Comprising Glass Fibre Mesh and Steel Fibres: Experiments and Modeling

Impact Strength of Preplaced Aggregate Concrete Comprising Glass Fibre Mesh and Steel Fibres: Experiments and Modeling

Residual strength capacity of reinforced reactive powder concrete two-way slabs subjected to drop weight

Experimental and Analytical Modeling of Flexural Impact Strength of Preplaced Aggregate Fibrous Concrete Beams

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