A Comparative Experimental Study on the Flexural Behavior of High‐Strength  Fiber‐Reinforced Concrete and High‐Strength Concrete Beams

Yang, In-Hwan; Joh, Changbin; Kim, Kyoung-Chul

doi:10.1155/2018/7390798

Cited by 33 publications

(16 citation statements)

References 24 publications

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“…The utilization of reinforcement bars (rebars) in the HSC matrix helps avoid brittle failures in HSC beams. However, as reported in some previous studies [7][8][9], increasing the number of rebars in HSC beams does not always improve the ductility of the beams. Rashid et al [10] carried out bending tests on various reinforced concrete beams with a wide range of concrete strengths and reinforcement ratios.…”

Section: Introductionmentioning

confidence: 57%

An Experimental Study on the Ductility and Flexural Toughness of Ultrahigh-Performance Concrete Beams Subjected to Bending

et al. 2020

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Ultrahigh-performance concrete (UHPC) and high-strength concrete (HSC) are currently widely used because of their distinct superior properties. Thus, a comprehensive comparison of the flexural behavior of UHPC and HSC beams is presented in this study. Nine UHPC beams and three HSC beams were subjected to pure bending tests to investigate the effect of various reinforcement ratios and steel fiber volume contents on the cracking and failure patterns, load-deflection behavior, ductility, and flexural toughness of these beams. The addition of steel fibers in the UHPC improved the energy absorption capacity of the beams, causing the UHPC beams to fail via rebar fracture. The deflection and curvature ductility indices were determined and compared in this study. The ductility indices of the HSC beam tended to decrease sharply as the rebar ratio increased, whereas those of the UHPC beam did not show a clear trend with respect to the rebar ratio. In addition, a comparison between the results in this study and the results from previous studies was performed. In this study, the addition of steel fiber contents up to 1.5% in UHPC increased the load capacity, ductility, and flexural toughness of the UHPC beams, whereas the addition of a steel fiber content of 2.0% did not significantly increase the ductility or flexural toughness of the UHPC beams.

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Section: Introductionmentioning

confidence: 57%

An Experimental Study on the Ductility and Flexural Toughness of Ultrahigh-Performance Concrete Beams Subjected to Bending

et al. 2020

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“…The geometric parameters of the beams were assigned based on the analysis of literature sources [4,5,6,8,9,10,11] 60x120mm, where the larger size is the height of the section, the total length of the element is 1.4 m. Based on the analysis of work [11], the deflectometer is set only in the middle of the span.…”

Section: Methodsmentioning

confidence: 99%

“…The beams were tested for pure bending -the most characteristic type of loading for such elements [9,10,11,12,13,14,15,16], this test scheme also corresponds to the papers devoted to the study of the "work" of rubcon beams under load [4,5,6].…”

Section: Methodsmentioning

confidence: 99%

Deformability of Rubcon and Fibrorubcon Beams

Aleksei¹,

Yuri²,

Artem³

2020

AFST

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The study of the deformability of building structures, especially bending elements, is an integral part ofa full study of structures, because it is often the deformability determines the size of the cross section ofthe element, to ensure the necessary rigidity of building structures. For beam elements, the mostimportant during exploitation are vertical displacement – deflections.For application (especially under the influence of aggressive environment) as a material of productionof the building structures we offer rubber concrete-polymer concrete which has favorable deformationand strength characteristics, high adhesion to metal surfaces. It is important to note that the compositionof fibrorubcon used industrial waste such as fly ash and fibers steel cord. It was establishedexperimentally that the strength of fibrorubcon corresponds to the class of high-strength concrete, butthe modulus of elasticity of rubcon corresponds to the modulus of elasticity of traditional concrete. Tostudy the deformability of rubcon and fibrorubcon bending elements we have made a beam with alongitudinal reinforcement percentage μ = 0...8.4%.The beams were tested for pure bending – the most characteristic type of loading for such elements. Onthe basis of the tests, a limit on the percentage of longitudinal reinforcement to satisfaction therequirements of the current standards for maximum deflections of fibrorubcon and rubcon beams wasset.

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“…Steel fiberreinforced concrete was also proven to be much more ductile than normal concrete under seismic and impact loads. Several experimental studies were conducted during the last decades to investigate the mechanical properties of steel fiber-reinforced concrete [1][2][3][4][5][6], whereas many other studies were focused on the effect of the use of steel fiber to enhance the flexural performance of unreinforced [7][8][9][10][11] and reinforced [12][13][14][15][16][17][18][19][20][21][22][23] concrete beams.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High‐Strength Concrete Hollow Beams

Abbass

Abid

Özakça

2019

Advances in Civil Engineering

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In this study, an experimental work was directed toward comparing the flexural behavior of solid and hollow steel fiber-reinforced concrete beams. For this purpose, eight square cross-sectional beam specimens, four solid and four hollow, were prepared. One concrete mixture with four different steel fiber contents of 0, 0.5, 1.0, and 1.5% were used. The side length of the central square hole was 80 mm, whereas the cross-sectional side length was 150 mm. All beams were tested under four-point monotonic loading until failure. In addition to the solid and hollow beams, cylinders were cast to evaluate the compressive strength, splitting tensile strength, and modulus of elasticity, whereas prisms were used to conduct the fracture test. The test results showed that all fibrous beams failed in flexure, whereas those without fiber exhibited flexural-shear failure. In general, the flexural behavior of fibrous-beams was superior to that of beams without fiber. The hollow beams with fiber contents of 0, 0.5, and 1.0% were observed to withstand lower loads at cracking, yielding, and peak stages compared with their corresponding solid beams; this was not the case for the 1.5% fiber hollow beam, which exhibited a higher peak load than its corresponding solid beam. Although all eight beams exhibited ductility indices higher than 3.7, hollow beams exhibited better ductility than solid beams, showing higher ductility index values.

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A Comparative Experimental Study on the Flexural Behavior of High‐Strength Fiber‐Reinforced Concrete and High‐Strength Concrete Beams

Cited by 33 publications

References 24 publications

An Experimental Study on the Ductility and Flexural Toughness of Ultrahigh-Performance Concrete Beams Subjected to Bending

An Experimental Study on the Ductility and Flexural Toughness of Ultrahigh-Performance Concrete Beams Subjected to Bending

Deformability of Rubcon and Fibrorubcon Beams

Experimental Investigation on the Effect of Steel Fibers on the Flexural Behavior and Ductility of High‐Strength Concrete Hollow Beams

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