Study of Crack Patterns of Fiber-Reinforced Concrete (FRC) Specimens Subjected to Static and Fatigue Testings Using CT-Scan Technology
This paper demonstrates the widely accepted hypothesis that the compressive testing is a particular case of a cyclic test where failure occurs during the first cycle. To perform this, a test on 32 fiber-reinforced high-performance concrete specimens have been carried out. Sixteen of them have been tested under low-cycle fatigue compressive loading up to failure. Eight of them have been tested under monotonic compressive loading, until failure too. And the last eight specimens have remained intact. All of them have been scanned using a Computed Tomography (CT) Scan in order to define the pattern of their damage, which includes voids and cracks. The results show that the average damage maps of monotonic and fatigue series are statistically identical, which confirms the hypothesis previously described. In addition, both series are different to the intact series, which means that not a random damage distribution occurs when specimens collapse.
The authors are grateful for the financial support from the Ministerio de Economía y Competitividad BIA2015-686678-C2-R, Spain, Junta de Comunidades de Castilla – La Mancha, Spain, Fondo Europeo de Desarrollo Regional, gran PEII-2014-016-P and INCRECYT Program.
- 1.Aas-Jackobsen, K.: Fatigue of concrete beams and columns. Ph.D. thesis, University of Trondheim (1970)Google Scholar
- 4.Hsu, T.: J. Am. Concr. Inst. 78(4), 192–305 (1981)Google Scholar
- 6.Pastorelli, E., Herrmann, H.: Virtual reality visualization for short fibre orientation analysis. In: 2014 14th Biennial Baltic Electronic Conference (BEC), pp. 201–204 (2014). https://doi.org/10.1109/BEC.2014.7320591
- 7.Petkovic, G., Lenschow, R., Stemland, H., Rosseland, S.: Fatigue of high strength concrete. ACI Spec. Publ. 121(25), 505–525 (1990)Google Scholar
- 15.Tepfers, R., Kutti, T.: Fatigue strength of plain, ordinary and lightweight concrete. J. Am. Concr. Inst. 76(5), 635–652 (1979)Google Scholar
- 16.Vicente, M., Minguez, J., González, D.: The use of computed tomography to explore the microstructure of materials in civil engineering: from rocks to concrete. In: Halefoglu, D.A.M. (ed.) Computed Tomography-Advanced Applications. InTech (2017). https://doi.org/10.5772/intechopen.69245Google Scholar
- 18.Zhang, B., Phillips, D., Wu, K.: Effects of loading frequency and stress reversal on fatigue life of plain concrete. Mag. Concr. Res. 48(4), 292–305 (1996)Google Scholar