Shear Behavior of Ultrahigh Performance Fiber-Reinforced Concrete Beams. II: Analysis and Design Provisions

Baby, Florent; Marchand, Pierre; Toutlemonde, François

doi:10.1061/(asce)st.1943-541x.0000908

Cited by 21 publications

(21 citation statements)

References 10 publications

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“…Thus, crack localization is primarily influenced by the strain capacity of the UHPFRC, and the contributions of the fiber bridging and the stirrups up to their yield strength seem to be effective only when the tensile strain capacity of the UHPFRC is much higher than the yield strain of the stirrups. In their study (Baby et al 2013c), the AFGC-SETRA recommendations were conservative for the shearcracking strength, but reasonable for the ultimate shear strength prediction of UHPFRC I-girders. Baby et al (2013a) also examined the feasibility of applying the modified compression field theory for the shear capacity of reinforced or prestressed UHPFRC beams.…”

Section: Flexural Dominated Reinforced Uhpfrc Beams Girders and Commentioning

confidence: 99%

“…7, clearly indicated that the fiber orientation significantly influenced the mechanical (flexural) performance; thus, they noted that the actual fiber orientation needs to be taken into account for shear design, as recommended by AFGC-SETRA recommendations (AFGC-SETRA 2002). By including 2.5 % steel fibers, an almost 250 % increase in shear strength was observed (Baby et al 2013c). The stirrups yielded first, while localization of the shear crack took place significantly later, as shown in Fig.…”

Section: Flexural Dominated Reinforced Uhpfrc Beams Girders and Commentioning

confidence: 99%

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A Review on Structural Behavior, Design, and Application of Ultra-High-Performance Fiber-Reinforced Concrete

Yoo

Yoon

2016

Int J Concr Struct Mater

244

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An overall review of the structural behaviors of ultra-high-performance fiber-reinforced concrete (UHPFRC) elements subjected to various loading conditions needs to be conducted to prevent duplicate research and to promote its practical applications. Thus, in this study, the behavior of various UHPFRC structures under different loading conditions, such as flexure, shear, torsion, and high-rate loads (impacts and blasts), were synthetically reviewed. In addition, the bond performance between UHPFRC and reinforcements, which is fundamental information for the structural performance of reinforced concrete structures, was investigated. The most widely used international recommendations for structural design with UHPFRC throughout the world (AFGC-SETRA and JSCE) were specifically introduced in terms of material models and flexural and shear design. Lastly, examples of practical applications of UHPFRC for both architectural and civil structures were examined.

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Section: Flexural Dominated Reinforced Uhpfrc Beams Girders and Commentioning

confidence: 99%

Section: Flexural Dominated Reinforced Uhpfrc Beams Girders and Commentioning

confidence: 99%

A Review on Structural Behavior, Design, and Application of Ultra-High-Performance Fiber-Reinforced Concrete

Yoo

Yoon

2016

Int J Concr Struct Mater

244

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“…It is important to point out that the steel fibers to be added to the mixture at an optimum proportion may be able to replace or reduce the shear reinforcement and/or shear link, which may be a reason to reinforce congestion for small cross-sections, since the UHP-FRC beams have very high compressive and tensile strengths [17]. However, the addition of steel fibers restricts the formation and propagation of cracks [17][18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Steel Fiber Use as Shear Reinforcement on I-Shaped UHP-FRC Beams

et al. 2019

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In the presented paper, the effectiveness of steel fiber use on the shear and flexure behaviors of ultra-high performance concrete (UHPC) beams and the feasibility of steel fibers in place of shear reinforcement were investigated experimentally. In this framework, a total of four I-shaped UHPC beams were produced for a high tensile reinforcement ratio of 2.2%. While two of them were non-fiber UHPC beams with and without the shear reinforcement to show the contribution of steel fibers, the remaining beams were made from the ultra-high performance steel fiber-reinforced concrete (UHP-FRC) having the short straight fibers with 1.5% and 2.5% by volume. The shear and flexural parameters, such as the load–deflection response, cracking pattern, failure mode, deflection, and curvature ductilities were discussed based on the four-point loading test results. While the reference beam without fiber and shear reinforcement failed by the shear with a sudden load drop before the yielding of reinforcement and produced no deflection capability, the inclusion of steel fibers to the UHPC matrix transformed the failure mode from shear to flexure through the fibers’ crack-bridging ability. It might be deduced that the moderate level of steel fiber use in the UHP-FRC beams may take the place of shear reinforcement in practical applications.

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“…Hence, the following RILEM TC TDF-162 (2003) equations (standard method) have been used to obtain the nominal shear strength of UHPC beams [14,27]: …”

Section: 22rilemtc 162-tdf (Test and Design Methods For Steel Fibementioning

confidence: 99%

“…Researchers have focused on the compressive and tensile strength, modulus of elasticity, Poisson's ratio, creep and shrinkage [7]. Furthermore, a large number of studies on UHPC have concentrated on flexural [8][9][10][11] and shear behaviors of this development [12][13][14][15][16][17][18].…”

mentioning

confidence: 99%

Determining Shear Capacity of Ultra-high Performance Concrete Beams by Experiments and Comparison with Codes

Pourbaba

Joghataie

2017

Scientia Iranica

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In this research, nineteen specimens of ultra-high performance fiber-reinforced concrete rectangular beams are made and their shear resistance is determined experimentally. The results are compared with estimations by ACI 318, RILEM TC 162-TDF, Australian guideline and Iranian national building regulations. To compare the code estimations, the ratio of experimental shear strength to predicted shear strength is calculated for each code.This ratio is actually a measure of safety factor on one hand and a measure of precision of the estimation on the other hand. Based on the results of both studies, the authors conclude that the Australian guideline with a ratio of 2.5 provides the minimum experimental to predicted ratio while the Iranian National Building Regulations with a ratio of about 10 provides the highest experimental to predicted ratio. This ratio obtained for ACI and RILEM was about 8 and 3.6 respectively. The Iranian and ACI codes provide basically the same strength estimation but both are very conservative, which may be interpreted as mainly because the codes are dubious about the precision of their own estimations. However, RILEM and Australian codes, estimate the shear resistance with reasonable margin of safety.

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Shear Behavior of Ultrahigh Performance Fiber-Reinforced Concrete Beams. II: Analysis and Design Provisions

Cited by 21 publications

References 10 publications

A Review on Structural Behavior, Design, and Application of Ultra-High-Performance Fiber-Reinforced Concrete

A Review on Structural Behavior, Design, and Application of Ultra-High-Performance Fiber-Reinforced Concrete

Steel Fiber Use as Shear Reinforcement on I-Shaped UHP-FRC Beams

Determining Shear Capacity of Ultra-high Performance Concrete Beams by Experiments and Comparison with Codes

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