Fracture energy-based optimisation of steel fibre reinforced concretes

Köksal, Fuat; Şahin, Yuşa; Gençel, Osman; Yiğit, İlhami

doi:10.1016/j.engfracmech.2013.04.018

Cited by 93 publications

(31 citation statements)

References 19 publications

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“…In fact, the tests on samples with a fibre content of 40 kg/m 3 reveal even lower energy dissipation than the ones with 30 kg/m 3 . This is in contradiction to the generally known information that energy dissipation at cracked state increases with a growing fibre content in the matrix, [2][3][4][5][6][7][8][9][10]. Similarly, a higher fibre content (40 kg/m 3 ) for both random and deliberate orientations generates lower fracture energies compared to a lower fibre content (30 kg/m 3 ).…”

Section: Discussioncontrasting

confidence: 68%

“…The parameters with the strongest influence on the improved tensile capacity compared to plain cement or concrete are the fibre mass or volume content (usually expressed in [kg/m 3 ] or [%], respectively), fibre aspect ratio (length-to-diameter-ratio), bond efficiency of the embedded fibre(s), and the fibre orientation with respect to the direction of the applied stress. A higher fibre content and higher aspect ratio generally lead to a higher post cracking strength [2][3][4][5][6][7][8][9][10][11]. On the other hand, the bond characteristics of the embedded fibres are determined by the fibre geometry and surface adhesion [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Preliminarno istraživanje utjecaja orijentacije vlakana u mikroarmiranim mortovima

Lakušić¹

2016

JCE

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Preliminary study on the influence of fibre orientation in fibre reinforced mortarsThe influence of steel fibres in fibre reinforced mortars is considered in the paper. Fresh mortar samples with randomly distributed fibres are placed in a spiral coil and exposed to electromagnetic filed so as to achieve orientation of fibres. The location and orientation of fibres is defined by x-ray images. The bending strength testing with deflection checking using the ICS system (Digital Image Correlation System) is conducted. Considering the fibre orientation and load applied, the results exhibit better energy dissipation and greater energy at fracture in case of samples with oriented fibres. Preliminarno istraživanje utjecaja orijentacije vlakana u mikroarmiranim mortovima U radu se obrađuje utjecaj čeličnih vlakana u mikroarmiranim mortovima. Uzorci morta u svježem stanju, s nasumično raspoređenim vlaknima su smješteni u spiralnu zavojnicu i izloženi elektromagnetskom polju u cilju postizanja usmjerenosti vlakana. Lokacija i orijentacija vlakana je određena rengenskom snimkom. Provedena su ispitivanja čvrstoće na savijanje uz kontrolu progiba ISC sustavom (engl. Digital Image Correlation System -ICS). S obzirom na orijentaciju vlakana, rezultati su pokazali poboljšanu disipaciju energije i veću energiju pri lomu kod uzoraka s usmjerenim vlaknima.

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Section: Discussioncontrasting

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Preliminarno istraživanje utjecaja orijentacije vlakana u mikroarmiranim mortovima

Lakušić¹

2016

JCE

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“…The proportions of the mixture, the concrete strength and fiber strength are the decisive properties that define the performance of FRC (also stated in [18]). The mixes used in the experiments were optimized to provide the best performance for the force-deflection diagrams.…”

Section: Description Of the Experimentsmentioning

confidence: 99%

“…The effect of w/c (the water/cement ratio) and the strength of the fibers on the fracture energy value was studied in [18]. The fracture properties were tested in accordance with [10].…”

Section: State-of-the-art In the Field Of Fracture Energy Of Frcmentioning

confidence: 99%

An analytical description of the force–deflection diagram of FRC

Kovář

Foglar

2015

Composites Part B: Engineering

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“…However, it can affect the flexural strength of SFRC more. There is some evidence to suggest that different steel fibres have different behaviour considering w/c ratio and so optimising the w/c ratio for designing a particular SFRC mix is critical [12].…”

mentioning

confidence: 99%

Effects of hook shape and cement replacement materials on pullout behaviour of steel fibres

Begg¹,

Zanjani²,

Barnett³

2016

Fouth International Conference on Advances in Civil, Structural and Construction Engineering - CSCE 2016

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Abstract-The purpose of this study is to investigate the effect of hook shape and material of high tensile strength hooked end steel fibres and the impact of cement replacement materials on pullout behaviour of steel fibres from cementitious composites. The cement replacements which have been used in this research included silica fume, pulverised fuel ash, limestone filler and ground granulated blast-furnace slag. In total, more than 800 samples have been manufactured for experimental research on compressive strength and pullout behaviour of hooked end steel fibres from cementitious matrices. The effects of parameters such as water/binder ratio, cement replacement content, age of sample, hooked end shape and tensile strength of fibre on fibre-matrix pullout behaviour were determined. The results of tests and analysis indicate that hook shape, tensile strength of fibre and silica fume affect the maximum pullout force and ground granulated blast-furnace slag can significantly improve the residual pullout energy which would be useful for the optimisation of steel fibre reinforced concrete. The outcome of this research may be useful to widen the potential applications of the material across civil engineering. (Abstract)

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Fracture energy-based optimisation of steel fibre reinforced concretes

Cited by 93 publications

References 19 publications

Preliminarno istraživanje utjecaja orijentacije vlakana u mikroarmiranim mortovima

Preliminarno istraživanje utjecaja orijentacije vlakana u mikroarmiranim mortovima

An analytical description of the force–deflection diagram of FRC

Effects of hook shape and cement replacement materials on pullout behaviour of steel fibres

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