Response of steel fiber reinforced high strength concrete beams: Experiments and code predictions

Biolzi, Luigi; Cattaneo, Sara

doi:10.1016/j.cemconcomp.2016.12.002

Cited by 86 publications

(49 citation statements)

References 13 publications

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“…Also, one main crack was localized in the central part of the specimens with steel fibers. The failure mechanism of specimens is in agreement with studies of Biolzi and Cattaneo (2017). Figure 6 shows the comparison of the capacity curves resulting from hysteretic curves.…”

Section: Hysteretic Behaviorsupporting

confidence: 83%

“…Figure 4 shows the cyclic response and fracture mechanism of specimens. The cracking pattern was studied in SFRC with stirrups by Biolzi and Cattaneo (2017). Beams without steel fibers were characterized concrete crushing in the compressive zone and a large number of cracks with branching led to failure, but in beams with steel fibers one main crack was usually localized in the central part of the beam (Fig.…”

Section: Hysteretic Behaviormentioning

confidence: 99%

“…Due to significant damages observed in the columns of model without steel fibers, a higher damping was observed as compared to the SFRC. Biolzi and Cattaneo (2017) studied the shear-flexural response of steel fiber-reinforced concrete beams with longitudinal and transverse reinforcement under four-point bending test in the form of monotonic behavior. They showed that the inclusion of steel fibers in concrete beams causes an important increase in shear and bending strength and also ductility and stiffness.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of steel fiber-reinforced concrete beams under cyclic loading

Ranjbaran

Rezayfar

Mirzababai

2018

Int J Adv Struct Eng

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An experimental study has been conducted to study the cyclic behavior of reinforced concrete beams in which steel fibers were added to the concrete mix. Seven similar geometrically specimens in full scale were studied under four-point bending test in the form of slow cyclic loading. One sample as a control specimen was made without steel fibers or 0% volume fraction (vf) and six other samples with 1, 2 and 4% vf of steel fibers in twin models. The maximum and ultimate resistance, ductility, degradation of loading and unloading stiffness, absorption and dissipation of energy and equivalent viscous damping were studied in this investigation and the effect of steel fibers on the cyclic behavior was compared with each other. Generally, the addition of steel fibers up to a certain limit value (vf = 2%) improves the cyclic behavior of reinforced concrete beams and results in the increase of maximum strength and ultimate displacement.

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Section: Hysteretic Behaviorsupporting

confidence: 83%

Section: Hysteretic Behaviormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of steel fiber-reinforced concrete beams under cyclic loading

Ranjbaran

Rezayfar

Mirzababai

2018

Int J Adv Struct Eng

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“…Owing to high tensile strength and high strain capacity of the RC‐SFRC composite, large deformations in longitudinal steel reinforcements are involved, and consequently, high ductility of the members is achieved . Studies highlight the fact that the moment capacity of RC beams are enhanced by addition of steel fibers . These studies focused to develop a relation between increased flexural capacity with fiber dosage, fiber type, and strength.…”

Section: Introductionmentioning

confidence: 99%

“…17 Studies highlight the fact that the moment capacity of RC beams are enhanced by addition of steel fibers. 4,12,[18][19][20][21][22][23] These studies focused to develop a relation between increased flexural capacity with fiber dosage, fiber type, and strength.…”

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confidence: 99%

Assessment of model error for reinforced concrete beams with steel fibers in bending

Foster

Parvez

2019

Structural Concrete

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Numerous models have been developed to determine the strength contributions of steel fibers in reinforced concrete beams in flexure; however, little work has been undertaken on determining their reliability, particularly when combined with use of inverse analysis procedures for determining the postcracking residual tensile strength provided by the fibers. Recently, leading codes have accepted design guidelines for designing flexurally reinforced concrete structural elements that also contain steel fibers using rational principles that are compatible with conventional reinforced concrete design. To provide confidence to the designer, it is imperative to verify the design models against experimental results and test their reliability. Despite extensive studies, design models have not been validated against large amount of test data. In this paper, 50 flexurally reinforced steel fiber reinforced concrete beams from the literature are analyzed for flexural strength. Ultimate moment capacities are predicted using the design procedures of NZS 3101–2–2006, fib Model Code 2010, DAfStb Guideline‐2015 and AS3600–2018. The results of the analyses show that the models perform well, with the AS3600 being the most conservative of the models assessed, and the NZS 3101–2–2006 the least conservative. The model errors for each are determined, and model reliability is discussed.

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A modeling strategy for the shear and flexural performance prediction of SFRC beams without stirrups accounting for the variability of properties

Benedito,

Vanalli,

Krahl

et al. 2024

Structural Concrete

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The behavior of steel fiber reinforced concrete (SFRC) is highly dependent on mix design, where the properties of its components, such as cementitious matrix and fibers, impact the physical and mechanical properties of the composite. Incorporating steel fibers into concrete modifies its physical properties, potentially leading to fiber segregation and resulting in a nonuniform distribution of the fibers within the material. In experimental studies, an increase in fiber volume has been found to change the failure mode of SFRC beams from shear to flexure, and numerical investigations have shown that randomness in fiber distribution can significantly influence the behavior of the composite. Therefore, this study aims to develop a numerical model that considers variations in material properties to simulate the change in the failure mode of SFRC beams due to variations in fiber volume. The failure and yielding parameters were initially established and integrated into the concrete damaged plasticity (CDP). Subsequently, the response of both steel and concrete to tension or compression stresses was ascertained. Finally, the appropriate meshes and finite elements were chosen for the simulation. In the final approach, two methods were employed to introduce randomness into the beam. One divided the beam into different vertical segments: 30, 45, and 90, and the other combined vertical and horizontal segments: 30 vertical with 4 horizontal, 45 vertical with 5 horizontal, and 90 vertical with 10 horizontal. A script was developed in Python to automatically insert the properties. The numerical model successfully captured the change in failure mode from shear to flexure resulting from fiber volume increase. Vertical and horizontal segments increased toughness due to crack deviation, better predicting cracking pattern and loading capacity for the highest fiber contents.

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Response of steel fiber reinforced high strength concrete beams: Experiments and code predictions

Cited by 86 publications

References 13 publications

Experimental investigation of steel fiber-reinforced concrete beams under cyclic loading

Experimental investigation of steel fiber-reinforced concrete beams under cyclic loading

Assessment of model error for reinforced concrete beams with steel fibers in bending

A modeling strategy for the shear and flexural performance prediction of SFRC beams without stirrups accounting for the variability of properties

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