Stress-strain characteristic of SFRC using recycled fibres

Tlemat, H.

doi:10.1617/14196

Cited by 11 publications

(15 citation statements)

References 4 publications

(5 reference statements)

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“…10. The figure confirms the linear relationship between mid-span deflection and strain and at the same time validates the choice of hinge length used to derive the stress-strain curves [8]. Figure 10 Numerical mid-span deflections versus tensile strains (1.5% VSF) By using Figures 6 and 7, it can be determined that the maximum strain of 10‰ (used by the original RILEM model [1]) corresponds only to 0.8 mm in deflection and hence, can not describe the full behaviour of the element which is capable of still resisting a substantial load at much higher deformations.…”

Section: Deflection-strain Deflection-neutral Axissupporting

confidence: 74%

“…Previous research by the authors [8] indicates that the compressive strain measured at peak load for SFRC containing 1.5% virgin steel fibres (VSF), during thirdpoint bending tests, is around 0.4‰. This strain is considered to be in the linear elastic region.…”

Section: Compressive Characteristicmentioning

confidence: 99%

“…The fracture energy dissipated in a single crack is purely a material property. If it is assumed that G F1 and G F2 are approximately the same and by using the normalised neutral axis depth (y) [8], the area under the stress-strain softening curve for a new mesh size can be obtained as follows. Right side of the page reserved to our referees n' GP Number of cracked Gaussian points along the crack for the new chosen element According to Hillerborg [25], the element length, along the crack path should not be greater than 0.1-0.2 l ch .…”

Section: Principal Stress Vectorsmentioning

confidence: 99%

“…As a result of this latter assumption, the SFRC tensile stress is overestimated. The authors showed by using nonlinear FEA [8], that the RILEM model in particular overestimates the load-carrying capacity of SFRC. The same result was reported by Hemmy [9].…”

Section: Introductionmentioning

confidence: 99%

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Modelling of SFRC using inverse finite element analysis

2006

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A method of inverse finite element analysis is used to determine the constitutive relationship of SFRC in tension, using primary experimental data. Based on beam bending test results and results from pull-out tests, an attempt is made to explain the physical processes taking place during the cracking stage. Basic models predicting the behaviour of SFRC in tension are proposed.Une méthode de FEA réversible est employée pour déterminer le rapport constitutif de SFRC en tension, en utilisant des données expérimentales primaires. Basé sur des résultats d'essai de flexion de poutre et des résultats des essais d'adhérence, une tentative est faite pour expliquer les processus physiques ayant lieu pendant l'étape fendante. On propose des modèles de base prévoyant le comportement de SFRC dans la tension.

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Section: Deflection-strain Deflection-neutral Axissupporting

confidence: 74%

Section: Compressive Characteristicmentioning

confidence: 99%

Section: Principal Stress Vectorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modelling of SFRC using inverse finite element analysis

2006

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“…In order to improve the resistance to tension, one can use steel reinforcement or fibres. On the basis of the experimental results it is obvious that steel fibres influence physical and mechanical as well as the technological properties of the concrete [8][9][10][11]. Steel and polymer fibres are being used for concrete reinforcement.…”

Section: Introductionmentioning

confidence: 99%

The usage of plastic waste as a secondary raw material for the modification of sandcrete properties

Klovas¹,

Daukšys²,

Venčkauskas³

2015

AIP Conference Proceedings

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Abstract.Recently the usage of various industry wastes as a secondary raw material tends to increase its relevancy. One of possible options to decrease the amount of waste is to use them to produce new products or materials. The operation of various secondary raw materials (tire rubber, tire cord, ground glass shards, ground ceramic waste products) during the concrete mixture preparation allows to change its as well as cured concrete properties. Recently polymer and steel fibers are used for concrete reinforcement. This study analyses the usage possibility of plastic shavings for the reinforcement of concrete. The technological properties of cement slurry (sand, fraction of 0/4 and 10 kg/m 3 , 15 kg/m 3 and 20 kg/m 3 of plastic shavings) as well as mechanical, physical and porosity properties of cured sandcrete were established during the experimental research. The geometric characteristics of mill-shredded plastic shavings were established. Experimental results revealed that the usage of plastic shavings decreased slurry slump and density. The minor decrease of cured sandcrete density (~2200 kg/m 3 ) was noticed with the addition of plastic shavings within the limits of 10 -20 kg/m 3 . The flexural strength of cured sandcrete increased from 36 % to 57 % compared with reference specimen (without plastic shavings). The dependence of flexural force and deflection was obtained. Study revealed that the residual strength after crack opening is bigger with the usage of plastic shavings as a secondary raw material compared with reference specimen.

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Improving cracking behaviour with recycled steel fibres targeting specific applications - analysis according to fib Model Code 2010

Groli

Caldentey

2017

Structural Concrete

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A new and appealing mean of improving the cracking behaviour of RC elements is the combined use of rebars and fibres. Previous research has shown that steel fibres recycled from end-of-life tyres are effective for this purpose. This paper presents and discusses practical applications that would benefit from the use of this technique. Firstly, two previously published examples of crack width calculation according to fib Model Code 2010 are expanded to the case under study. These practical applications show how a fibre-reinforced concrete (FRC) with a rather poor post-peak behaviour can exhibit large improvements in cracking behaviour while being economically attractive, too. The case of jointless structures is then considered, and the improvements in terms of maximum achievable length are presented and discussed. Finally, an analysis regarding the effectiveness of this solution as a function of the reinforcement ratio is discussed for both tension and bending. The main objective of this paper is to encourage the use of recycled steel fibres as an effective and sustainable mean of dealing with cracking behaviour for specific applications. K E Y W O R D Scracking, FRC, recycled steel fibres, fib Model Code 2010, integral structures

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Stress-strain characteristic of SFRC using recycled fibres

Cited by 11 publications

References 4 publications

Modelling of SFRC using inverse finite element analysis

Modelling of SFRC using inverse finite element analysis

The usage of plastic waste as a secondary raw material for the modification of sandcrete properties

Improving cracking behaviour with recycled steel fibres targeting specific applications - analysis according to fib Model Code 2010

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