Evaluation of the splitting tensile strength in plain and steel fiber-reinforced concrete based on the compressive strength

Behnood, Ali; Verian, Kho Pin; Gharehveran, Mahsa Modiri

doi:10.1016/j.conbuildmat.2015.08.124

Cited by 139 publications

(51 citation statements)

References 40 publications

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“…38 Nevertheless, the most common approach entails obtaining the tensile behaviour of FRC by using splitting tensile tests or by finding relations between the tensile behaviour and other mechanical properties of the material. 39,40 Therefore, if it were possible to compare the fracture under flexural testing and the tensile behaviour of FRC from real tests, the uncertainties derived from the indirect approach would be avoided, and a greater reliability in the material properties obtained could be achieved. In addition, this would be of high relevance in the case of PFRC where there is still hardly any research published dealing with this issue.…”

Section: Introductionmentioning

confidence: 99%

Constitutive relationship of polyolefin fibre–reinforced concrete: Experimental and numerical approaches to tensile and flexural behaviour

Enfedaque

Alberti

Beltran³

2017

Fatigue Fract Eng Mat Struct

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Flexural tensile tests are usually used to evaluate the suitability of fibre‐reinforced concrete (FRC) in structural applications. The constitutive relationships of FRC are derived from such tests by using several inverse analyses. Given that the structural design of FRC is based on the residual load‐bearing capacities obtained under flexural tests, the approach to analyse fracture behaviour by means of uniaxial tensile tests would mean use of more direct and reliable constitutive curves compared with those obtained by indirect means. The significance of this paper lies in the characterisation of polyolefin fibre–reinforced concrete (PFRC) not only by using fracture flexural results tests but also by comparing such results with the direct tensile behaviour of the material obtained from uniaxial tests. This comparison would both extend the knowledge of the PFRC mechanical properties and broaden the reliability of structural design by comparing the behaviour of PFRC under flexural and tensile stresses. Moreover, the suitability of an iterative method proposed by the authors for obtaining the constitutive relations of PFRC from flexural tests has been checked by performing a series of numerical simulations of the tensile tests performed. The differences in the properties obtained in the flexural tests and the tensile tests have been assessed. The experimental results gathered from the tensile tests have been accurately reproduced by using a cohesive crack approach with trilinear softening functions by the iterative inverse analysis proposed.

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Section: Introductionmentioning

confidence: 99%

Constitutive relationship of polyolefin fibre–reinforced concrete: Experimental and numerical approaches to tensile and flexural behaviour

Enfedaque

Alberti

Beltran³

2017

Fatigue Fract Eng Mat Struct

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“…Fibers, particularly those made from steel and polymers or even composites, have been used to reduce or even replace rebars in various types of structural contexts, particularly in flat members such as airport taxiways [18], slabs-on-ground [19] and elevated slabs [20]. Since fibers are much smaller than traditional rebars and are, to a notable extent, uniformly dispersed and oriented within concrete matrix, they can distribute stress effectively in concrete and can resist the occurrence of local damage [21][22][23].…”

Section: The Benefits and Challenges Of Using The Existing Discrete Rmentioning

confidence: 99%

Mechanical Processing of GFRP Waste into Large-Sized Pieces for Use in Concrete

2018

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Recycling glass fiber reinforced polymer (GFRP) composite materials has been proven to be challenging due to their high mechanical performance and high resistance to harsh chemical and thermal conditions. This work discusses the efforts made in the past to mechanically process GFRP waste materials by cutting them into large-sized (cm scale) pieces, as opposed to pulverization, for use in concrete mixtures. These pieces can be classified into two main categories-coarse aggregate and discrete reinforcement, here referred to as "needles." The results from all the studies show that using GFRP coarse aggregate leads to significant reductions in the compressive strength and tensile strength of concrete. However, GFRP needles lead to sizable increases in the energy absorption capacity of concrete. In addition, if the glass fibers are longitudinally aligned within the needles, these elements can substantially increase the tensile strength of concrete. Processing GFRP waste into needles requires less energy and time than that for producing GFRP coarse aggregate. Also, compared to pulverized GFRP waste, which consists of broken and separate particles of glass and resin that at best can be used as low-quality fillers, GFRP needles are high strength composite elements.Recycling 2018, 3, 8 2 of 11 fibers [8]. These techniques are very costly and are justifiable only for carbon fiber reinforced polymer composite materials because of the high price of carbon fibers.Low-impact processing of GFRP into products which can be used in built infrastructure can have a significant beneficial impact on the environment, as it reduces the demand for natural resources and the need for landfilling. Mechanical recycling of GFRP is an attractive option in terms of lower energy demand and the avoidance of chemical processes. The energy required for mechanical recycling is between 0.5% and 5% of that required for chemical recycling and between 0.4% and 16% of the energy used for thermal recycling (pyrolysis) [9]. One issue with traditional mechanical processing (pulverizing or shredding) is that the processed GFRP is no longer a composite material. It consists of separate pieces of broken damaged fibers and resin particles and therefore has a negative impact on the mechanical properties of the new material in which it is incorporated [8,[10][11][12]. Cutting GFRP waste into relatively large pieces for use in new products, as opposed to grinding and shredding, is an attractive potential recycling option for two reasons: (1) the energy demand for cutting GFRP to large pieces is less than that required for grinding and shredding (since less surface is generated) and (2) cut pieces of GFRP are composite materials, rather than separate damaged fibers and resin particles, with mechanical properties the same as those of the GFRP before being processed.This work presents the main investigations performed in the past on the incorporation of coarse processed GFRP waste in concrete. In those studies, different types of GFRP products were processed into ele...

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“…It is based on the principle of structural risk minimization (SRM), which aims to minimize an upper bound on the expected risk rather than minimizing the error of the training samples. This gives SVM better generalization ability even for small sample learning [43]. Moreover, with the introduction of the ε-insensitive loss function by Vapink [44], SVM has been extended to deal with regression problems, also known as support vector regression (SVR).…”

Section: Support Vector Machinementioning

confidence: 99%

Prediction of Moment Redistribution in Statically Indeterminate Reinforced Concrete Structures Using Artificial Neural Network and Support Vector Regression

Zheng

Wang

2018

Applied Sciences

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In this paper, a new prediction model is proposed that fully considers the various parameters influencing the moment redistribution in statically indeterminate reinforced concrete (RC) structures by using the artificial neural network (ANN) and support vector regression (SVR). Twenty-four continuous RC beams and 12 continuous RC frames with various design parameters were tested to investigate the process of moment redistribution. Based on the experimental results obtained from this study and the published literature, a reliable database with 111 datasets was developed for the training and testing of the models. The predicted values of the proposed models, together with the estimations of the widely used code methods, were compared with the experimental results in the database. The analysis results showed that both the proposed ANN and SVR models exhibit high accuracy and reliability for the prediction of the moment redistribution.

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Evaluation of the splitting tensile strength in plain and steel fiber-reinforced concrete based on the compressive strength

Cited by 139 publications

References 40 publications

Constitutive relationship of polyolefin fibre–reinforced concrete: Experimental and numerical approaches to tensile and flexural behaviour

Constitutive relationship of polyolefin fibre–reinforced concrete: Experimental and numerical approaches to tensile and flexural behaviour

Mechanical Processing of GFRP Waste into Large-Sized Pieces for Use in Concrete

Prediction of Moment Redistribution in Statically Indeterminate Reinforced Concrete Structures Using Artificial Neural Network and Support Vector Regression

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