scholarly journals NON-LINEAR NUMERICAL MODELS FOR PREDICTING THE BOND STRENGTH OF FIBRE-REINFORCED CONCRETE AT HIGH TEMPERATURES

2019 ◽  
Author(s):  
FRANCISCO B. VARONA ◽  
YOLANDA VILLACAMPA ◽  
FRANCISCO JOSÉ NAVARRO-GONZÁLEZ ◽  
DAVID BRU ◽  
FRANCISCO JAVIER BAEZA
Keyword(s):  
Reinforced Concrete ◽  
Bond Strength ◽  
High Temperatures ◽  
Numerical Models ◽  
Fibre Reinforced Concrete ◽  
Non Linear

scholarly journals Discussion: Bond strength in steel-fibre-reinforced concrete

1975 ◽  
Vol 27 (91) ◽  
pp. 123-124
Author(s):  
G. H. Tattersall ◽  
C. R. Urbanowicz ◽  
R. J. Gray ◽  
C. D. Johnston
Keyword(s):  
Reinforced Concrete ◽  
Bond Strength ◽  
Steel Fibre ◽  
Fibre Reinforced Concrete ◽  
Steel Fibre Reinforced Concrete

scholarly journals Comparative Evaluation of Mechanical Properties of Fibre-Reinforced Concrete and Approach to Modelling of Bearing Capacity Ground Slab

2017 ◽  
Author(s):  
Oldrich Sucharda ◽  
Vlastimil Bilek ◽  
Martina Smirakova ◽  
Jan Kubosek ◽  
Radim Cajka
Keyword(s):  
Reinforced Concrete ◽  
Material Properties ◽  
Laboratory Tests ◽  
Steel Fibre ◽  
Numerical Models ◽  
Research Programme ◽  
Fibre Reinforced Concrete ◽  
Steel Fibre Reinforced Concrete ◽  
Degree Of Reinforcement

The use of steel fibre-reinforced concrete is becoming gradually widespread in the engineering design of buildings. Typical cases include concrete foundations or floors. The actual design approach is often different. The proposal significantly encompasses the knowledge and range of the material properties of steel fibre-reinforced concrete. This article presents a comprehensive research programme, which has been focused on extensive laboratory testing, in situ testing and advanced numerical modelling using computing models and nonlinear models of concrete. It aims at a comprehensive description of the material properties of concrete, according to the degree of reinforcement, using 8 types of laboratory tests for description. In total, over 74 specified laboratory tests and four slab tests in situ are carried out. Selected evaluated material properties are also provided for the regression curve according to the degree of reinforcement, 0 to 3%. Subsequently, the detailed description of steel fibre is used in advanced modelling of tests of concrete slabs in situ. Numerical models simulate the behaviour of the steel fibre-reinforced concrete base structure in the interaction with the subsoil, where the objective was to verify the total carrying capacity of the slab structure.

scholarly journals Carbon Fibre Reinforced Concrete: Dependency of Bond Strength on T<sub>g</sub> of Yarn Impregnating Polymer

2019 ◽  
Vol 10 (04) ◽  
pp. 328-348
Author(s):  
Iris Kruppke ◽  
Marko Butler ◽  
Kai Schneider ◽  
Rolf-Dieter Hund ◽  
Viktor Mechtcherine ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Bond Strength ◽  
Carbon Fibre ◽  
Fibre Reinforced Concrete

scholarly journals Experimental and Numerical Investigation on the Size Effect of Ultrahigh-Performance Fibre-Reinforced Concrete (UHFRC)

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5714
Author(s):  
Andreas Lampropoulos ◽  
Demetris Nicolaides ◽  
Spyridon Paschalis ◽  
Ourania Tsioulou
Keyword(s):  
Reinforced Concrete ◽  
Size Effect ◽  
Numerical Models ◽  
Tensile Tests ◽  
Tensile Behaviour ◽  
Fibre Reinforced Concrete ◽  
Direct Tension ◽  
Flexural Tests ◽  
Direct Tensile ◽  
Efficiency And Reliability

In the last few years, there has been increasing interest in the use of Ultrahigh-Performance Fibre-Reinforced Concrete (UHPFRC) layers or jackets, which have been proved to be quite effective in strengthening applications. However, to facilitate the extensive use of UHPFRC in strengthening applications, reliable numerical models need to be developed. In the case of UHPFRC, it is common practice to perform either direct tensile or flexural tests to determine the UHPFRC tensile stress–strain models. However, the geometry of the specimens used for the material characterization is, in most cases, significantly different to the geometry of the layers used in strengthening applications which are normally of quite small thickness. Therefore, and since the material properties of UHPFRC are highly dependent on the dimensions of the examined specimens, the so called “size effect” needs to be considered for the development of an improved modelling approach. In this study, direct tensile tests have been used and a constitutive model for the tensile behaviour of UHPFRC is proposed, taking into consideration the size of the finite elements. The efficiency and reliability of the proposed approach has been validated using experimental data on prisms with different geometries, tested in flexure and in direct tension.

Fibre Cocktail to Improve Fire Resistance

2016 ◽  
Vol 711 ◽  
pp. 480-487
Author(s):  
György L. Balázs ◽  
Olivér Czoboly
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Flexural Strength ◽  
High Temperatures ◽  
Fire Resistance ◽  
Fibre Reinforced Concrete ◽  
Cellulose Fibres ◽  
Cold State

Favourable experience with fibre reinforced concrete (FRC) resulted in its increasing use worldwide. The properties of fibre reinforced concrete are mostly influenced by the type and the amount of fibres. Our experimental study was directed to the possible improvements of the residual flexural strength and the properties of concrete exposed to high temperatures with different fibre cocktails including steel, micro polymer or cellulose fibres. The influence of type and amount of fibres on residual flexural strength in cold state were tested after 300, 500 or 800 °C temperature loading.

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