Influence of fiber length on load-bearing capacity of strengthened cross-section using fiber reinforced concrete

Vavruš, Martin

doi:10.1016/j.trpro.2021.07.081

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…In this study, 25 mm of fiber was used while the length of fiber was 30mm in literature [12]. Due to the increase in the effective bonding area of fibers at crack surfaces, the increase in the length of steel fiber provides advantages in terms of ultimate load and corresponding slip between the matrix and the fiber [4,5].…”

Section: Load-deflection Curvesmentioning

confidence: 99%

“…Fibers ensure the stress transfer from the matrix to the fibers, which in turn retard their propagation [2] and provide a good bond existing between the fibers and the hardened cement matrix, particularly for long fibers [3]. Moreover, an increase in the length of steel fiber improves the peak pullout load and corresponding slip between the matrix and the fiber, owing to the increase in the effective bonding area of fibers at crack surfaces [4,5]. For this reason, long fibers can provide a stable post-peak response.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

et al. 2022

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Aligning steel fibers is an effective way to improve the mechanical properties of steel fiber cementitious composites (SFRC). In this study, the magnetic field method was used to prepare the aligned hooked-end steel fiber cementitious composites (ASFRC) and the fracture behavior was investigated. In order to achieve the alignment of steel fibers, the key parameters including the rheology of the mixture and magnetic induction of electromagnetic field were theoretically analyzed. The results showed that, compared with SFRC, the cracking load and the ultimate load of ASFRC were increased about 24–55% and 51–86%, respectively, depending on the fiber addition content. In addition, the flexural tensile strength and residual flexural strength of ASFRC were found to increase up to 105% and 100%, respectively. The orientation of steel fibers also has a significant effect on energy consumption. The fracture energy of ASFRC was 56–70% greater than SFRC and the reinforcement effect of hooked-end steel fiber was higher than straight steel fiber. The fibers in the fracture surface showed that not only was the number of fibers of ASFRC higher than that of SFRC, but also the orientation efficiency factor of ASFRC was superior to SFRC, which explains the improvement of fracture behavior of ASFRC.

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Section: Load-deflection Curvesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

et al. 2022

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“…Typical way how to strengthen the member, as the beams and columns, is e.g. using the FRP materials [1][2][3][4][5]. The fibre reinforced concrete (FRC) is mostly used on concrete floors [6], but recent researches are also focused on use of the FRC to strengthen columns [7,8].…”

Section: Introductionmentioning

confidence: 99%

Innovative strengthening of RC columns using a layer of a fibre reinforced concrete

Koteš

Vavruš

Raczkiewicz

2022

APP

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Reinforced concrete structures that are influenced by degradation, overloading, the thawing and freezing cycles, abrasive damage and corrosion of reinforcement, should be repaired or strengthened. Each of those mentioned situations lead to decreasing the load-carrying capacity of the construction. The damage of a structure or its member causes exceeding the serviceability limit states and ultimate limit states. For this reason, for further use of the structures, they have to be strengthened to increase the load-carrying capacity and to extend the remaining lifetime. A new method for strengthening the vertical members, e.g., columns, is using the fibre reinforced concrete layer and its increased tensile strength in comparison to common RC concrete. This article deals with the theoretical design of dimensioning the columns using a layer of fibre concrete around a column (wrapping). In this case, it is necessary to calculate the residual strength of fibre concrete, which is a crucial factor for the tensile strength of the element.

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Calculation of Eccentrically Compressed RC Columns Strengthened by CFRP Under Different Load Level

Blikharskyy

Panchenko

Sobko

et al. 2022

Lecture Notes in Civil Engineering

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Influence of fiber length on load-bearing capacity of strengthened cross-section using fiber reinforced concrete

Cited by 4 publications

References 32 publications

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

Investigation on Fracture Behavior of Cementitious Composites Reinforced with Aligned Hooked-End Steel Fibers

Innovative strengthening of RC columns using a layer of a fibre reinforced concrete

Calculation of Eccentrically Compressed RC Columns Strengthened by CFRP Under Different Load Level

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