A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Uniaxial Tension Tests of Steel Fibre Reinforced Concrete with AE Monitoring
The uniaxial tensile behaviour of steel fibre reinforced concrete (SFRC) is an important material characterisation. However, uniaxial tensile tests (UTT) are difficult to perform and thus less reported in literature compared to bending tests. This paper investigates the uniaxial tensile behaviour of four SFRC mixtures. An advanced UTT setup was developed with acoustic emission (AE) monitoring. Besides monotonic loading, also progressive cyclic loading has been applied. Two hooked end steel fibre types are both used in a content of 20 and 40 kg/m3. These fibre characteristics and their distribution and orientation have a large impact on the load-displacement behaviour. Micro-cracking is detected by means of AE activity. Failure mode analysis shows the onset of macro-cracking by the downshift of average frequency and the increase of rise angle. A larger amount of frictional damage results in more AE events during unloading and an increased AE energy amount. Localisation of AE events validated the position of the fibres in the fracture plane. During the different loading stages, the crack’s initiation and development are accurately localised. Lastly, predictions of the tensile strength and behaviour according to Model Code 2010 are in good agreement with the experimental results.
Uniaxial Tension Tests of Steel Fibre Reinforced Concrete with AE Monitoring
The uniaxial tensile behaviour of steel fibre reinforced concrete (SFRC) is an important material characterisation. However, uniaxial tensile tests (UTT) are difficult to perform and thus less reported in literature compared to bending tests. This paper investigates the uniaxial tensile behaviour of four SFRC mixtures. An advanced UTT setup was developed with acoustic emission (AE) monitoring. Besides monotonic loading, also progressive cyclic loading has been applied. Two hooked end steel fibre types are both used in a content of 20 and 40 kg/m3. These fibre characteristics and their distribution and orientation have a large impact on the load-displacement behaviour. Micro-cracking is detected by means of AE activity. Failure mode analysis shows the onset of macro-cracking by the downshift of average frequency and the increase of rise angle. A larger amount of frictional damage results in more AE events during unloading and an increased AE energy amount. Localisation of AE events validated the position of the fibres in the fracture plane. During the different loading stages, the crack’s initiation and development are accurately localised. Lastly, predictions of the tensile strength and behaviour according to Model Code 2010 are in good agreement with the experimental results.
Uniaxial Tension Tests of Steel Fibre Reinforced Concrete with AE Monitoring
RILEM Bookseries
Serna, Pedro (editor) / Llano-Torre, Aitor (editor) / Martí-Vargas, José R. (editor) / Navarro-Gregori, Juan (editor) / De Smedt, Maure (author) / Vandecruys, Eline (author) / Vrijdaghs, Rutger (author) / Verstrynge, Els (author) / Vandewalle, Lucie (author)
RILEM-fib International Symposium on Fibre Reinforced Concrete ; 2021 ; Valencia, Spain
Fibre Reinforced Concrete: Improvements and Innovations II ; Chapter: 13 ; 143-154
RILEM Bookseries ; 36
2021-09-05
12 pages
Article/Chapter (Book)
Electronic Resource
English
Uniaxial tension test for steel fibre reinforced concrete--a parametric study
| Online Contents | 2003
Testing of Concrete and Fibre Reinforced Concrete in Uniaxial Tension
| British Library Conference Proceedings | 2015