Determination of the Stress–Crack Opening Relationship of SFRC by an Inverse Analysis

Meškėnas, Adas; Kaklauskas, Gintaris; Daniūnas, Alfonsas; Bačinskas, Darius; Jakubovskis, Ronaldas; Gribniak, S.; Gelazius, V.

doi:10.1007/s11029-013-9385-8

Cited by 9 publications

(6 citation statements)

References 3 publications

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“…Further, fibrous beams present higher values of d Pmax , which defines the displacement of the beam at the maximum load capacity, than the corresponding non-fibrous beams. This is attributed to the ability of steel fibers to increase the residual tensile stresses after cracking [7,44,89] and to delay cracking and, consequently, increase the deformation capability of the beams, even in reversal loading conditions.…”

Section: Experimental Database and Comparisonsmentioning

confidence: 99%

Cyclic Response of Steel Fiber Reinforced Concrete Slender Beams: An Experimental Study

2019

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Reinforced concrete (RC) beams under cyclic loading usually suffer from reduced aggregate interlock and eventually weakened concrete compression zone due to severe cracking and the brittle nature of compressive failure. On the other hand, the addition of steel fibers can reduce and delay cracking and increase the flexural/shear capacity and the ductility of RC beams. The influence of steel fibers on the response of RC beams with conventional steel reinforcements subjected to reversal loading by a four-point bending scheme was experimentally investigated. Three slender beams, each 2.5 m long with a rectangular cross-section, were constructed and tested for the purposes of this investigation; two beams using steel fibrous reinforced concrete and one with plain reinforced concrete as the reference specimen. Hook-ended steel fibers, each with a length-to-diameter ratio equal to 44 and two different volumetric proportions (1% and 3%), were added to the steel fiber reinforced concrete (SFRC) beams. Accompanying, compression, and splitting tests were also carried out to evaluate the compressive and tensile splitting strength of the used fibrous concrete mixtures. Test results concerning the hysteretic response based on the energy dissipation capabilities (also in terms of equivalent viscous damping), the damage indices, the cracking performance, and the failure of the examined beams were presented and discussed. Test results indicated that the SFRC beam demonstrated improved overall hysteretic response, increased absorbed energy capacities, enhanced cracking patterns, and altered failure character from concrete crushing to a ductile flexural one compared to the RC beam. The non-fibrous reference specimen demonstrated shear diagonal cracking failing in a brittle manner, whereas the SFRC beam with 1% steel fibers failed after concrete spalling with satisfactory ductility. The SFRC beam with 3% steel fibers exhibited an improved cyclic response, achieving a pronounced flexural behavior with significant ductility due to the ability of the fibers to transfer the developed tensile stresses across crack surfaces, preventing inclined shear cracks or concrete spalling. A report of an experimental database consisting of 39 beam specimens tested under cyclic loading was also presented in order to establish the effectiveness of steel fibers, examine the fiber content efficiency and clarify their role on the hysteretic response and the failure mode of RC structural members.

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Section: Experimental Database and Comparisonsmentioning

confidence: 99%

Cyclic Response of Steel Fiber Reinforced Concrete Slender Beams: An Experimental Study

2019

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“…When a crack begins to widen, it comes into contact with a number of fibers that are either perpendicular to it or positioned at an angle and resist its widening. Fibers act as crack arrestors and transmit tensile stresses through the cracks [10][11][12][13][14][15]. The gradual activation of the fibers results in the transformation of the overall behavior of the concrete from brittle to pseudo-ductile, enhance the energy dissipation capacity and reduce the width Materials 2021, 14, 3889 2 of 24 of the cracks [16,17].…”

Section: Post-cracking Behavior Of Steel Fiber Reinforced Concrete (Sfrc)mentioning

confidence: 99%

Multivariable Regression Strength Model for Steel Fiber-Reinforced Concrete Beams under Torsion

2021

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Torsional behavior and an analysis of steel fiber reinforced concrete (SFRC) beams are investigated in this paper. The purpose of this study is twofold: to examine the torsion strength models for SFRC beams available in the literature and to address properly verified design formulations for SFRC beams under torsion. A total of 210 SFRC beams tested under torsion from 16 different experimental investigations around the world are compiled. The few strength models available from the literature are adapted herein and are used to calculate the torsional strength of the beams. The predicted strength is compared with the experimental values measured by the performed torsional tests and these comparisons showed room for improvement. First, a proposed model is based on optimizing the constants of the existing formulations using multi-linear regression. Furthermore, a second model is proposed, which is based on modifying the American Concrete Institute (ACI) design code for reinforced concrete (RC) members to include the effect of steel fibers on the torsional capacity of SFRC beams. Applications of the proposed models showed better compliance and consistency with the experimental results compared to the available design models, providing safe and verified predictions. Furthermore, the second model implements the ACI code for RC using a simple and easy-to-apply formulation.

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“…In order to evaluate the adequacy of the proposed and selected standard techniques for the quantification of residual strength of SFRC, a numerical analysis using nonlinear analysis FE software ATENA is carried out. This chapter includes the material presented in journal publications Meškėnas et al (2014a), Meškėnas et al (2014b) and conference proceedings Meškėnas et al (2013a) and Kaklauskas et al (2013).…”

Section: Analysis Of Residual Strength Of Steel Fibre Reinforced Concmentioning

confidence: 99%

Serviceability Analysis of Steel Fibre Reinforced Concrete Beams

Meškėnas¹

2018

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Disertacija ginama eksternu. Mokslinis konsultantas doc. dr. Darius BAČINSKAS (Vilniaus Gedimino technikos universitetas, statybos inžinerija-02T). Vilniaus Gedimino technikos universiteto Statybos inžinerijos mokslo krypties disertacijos gynimo taryba: Pirmininkas prof. dr. Juozas VALIVONIS (Vilniaus Gedimino technikos universitetas, statybos inžinerija-02T). Nariai: doc. habil. dr. Renata KOTYNIA (Lodzės technologijos universitetas, Lenkija, statybos inžinerija-02T), doc. dr. Vladimir POPOV (Vilniaus Gedimino technikos universitetas, statybos inžinerija-02T), dr. Rimvydas STONYS (Vilniaus Gedimino technikos universitetas, medžiagų inžinerija-08T), doc. dr. Vitoldas VAITKEVIČIUS (Kauno technologijos universitetas, statybos inžinerija-02T). Disertacija bus ginama viešame Statybos inžinerijos mokslo krypties disertacijos gynimo tarybos posėdyje 2018 m. vasario 27 d. 10 val. Vilniaus Gedimino technikos universiteto senato posėdžių salėje.

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Determination of the Stress–Crack Opening Relationship of SFRC by an Inverse Analysis

Cited by 9 publications

References 3 publications

Cyclic Response of Steel Fiber Reinforced Concrete Slender Beams: An Experimental Study

Cyclic Response of Steel Fiber Reinforced Concrete Slender Beams: An Experimental Study

Multivariable Regression Strength Model for Steel Fiber-Reinforced Concrete Beams under Torsion

Serviceability Analysis of Steel Fibre Reinforced Concrete Beams

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