Issue 31

A. Abrishambaf et alii, Frattura ed Integrità Strutturale, 31 (2015) 38-53; DOI: 10.3221/IGF-ESIS.31.04 52 5. The inverse analysis of the splitting tensile response can estimate with a relatively good accuracy the uniaxial tensile behaviour, in particular, for low fibre contents. In general, in the case of using a relatively high content of fibres, which lead to either a partial or full pseudo-hardening behaviour (as it was the case of the θ =0 ° series), the proposed methodology could somehow overestimate the σ – w law. In this case it is preferable to use a modified version of the splitting tensile test similar to the one proposed by di Prisco et al. [33]. A CKNOWLEDGEMENTS his work is supported by the FEDER funds through the Operational Program for Competitiveness Factors - COMPETE and National Funds through FCT - Portuguese Foundation for Science and Technology under the project SlabSys-HFRC-PTDC/ECM/120394/2010. The authors would like to acknowledge the materials supplied by Radmix and Maccaferri (fibres), SECIL (cement), SIKA and BASF (superplasticizers), Omya Comital (limestone filler), and Pegop (Fly ash). R EFERENCES [1] ACI 544–1R, 2002, State-of-the-art report on fiber reinforced concrete, Technical report, American Concrete Institute, (2002). [2] Balaguru, P.N., Shah, S.P., Fiber reinforced cement composites, McGraw-Hill Inc., New York, (1992). [3] Vandewalle, L., Dupont, D., Bending test and interpretation, test and design methods for steel fibre reinforced concrete, background and Experiences, RILEM publication PRO 31, Bagneux, (2003) 1-14. [4] Banthia, N., Trottier, J., Concrete reinforced with deformed steel fibres, Part I: Bond-slip mechanisms, ACI Materials Journal, 91(1994) 435-446. [5] Cunha, V.M.C.F., Barros,J.A.O., Sena-Cruz,J.M., Pullout behaviour of Steel Fibres in Self Compacting Concrete, ASCE Journal of Materials in Civil Construction, 22 (2010) 1-9. [6] Laranjeira, F., Design-oriented constitutive model for steel fiber reinforced concrete, PhD thesis, Universitat Politècnica de Catalunya, (2010). [7] Ferrara, L., Meda, A., Relationships between fibre distribution, workability and the mechanical properties of SFRC applied to precast roof elements, Materials and Structures, 39 (2006) 411-420. [8] Pansuk, W., Sato, H., Sato, Y., Shionaga, R., Tensile behaviours and fibre orientation of UHPC, In Proceedings of Second International Symposium on Ultra High Performance Concrete, Kassel, Germany (Kassel University Press), (2008) 161-168. [9] Kim, S.W., Kang, S.T., Park, J.J., Ryu, G.S., Effect of filling method on fibre orientation and dispersion and mechanical properties of UHPC, Proceedings of Second International Symposium on Ultra High Performance Concrete, Kassel, Germany (Kassel University Press), (2008) 185-192. [10] EFNARC, The European guidelines for self-compacting concrete, (2005). [11] Barnett, S.J., Lataste, J.F., Parry, T., Millard, S.G., Soutsos, M.N., Assessment of fiber orientation in ultra high performance fibre reinforced concrete and its effects on flexural strength, Materials and Structures, 43 (2010) 1009- 1023. [12] ASTM C496, Standard test method for splitting tensile strength of cylindrical concrete specimens, Annual Book of ASTM Standards, American Society of Testing Materials, (2004). [13] RILEM TC162-TDF, Test and design methods for steel fibre reinforced concrete: Uniaxial tension test for steel fibre reinforced concrete, Materials and Structures, 34 (2001) 3-6. [14] Cunha, V.M.C.F., Barros, J.A.O., Sena-Cruz,J.M., An integral approach for modelling the tensile behaviour of steel fibre reinforced self-compacting concrete, Cement and Concrete Research, 41 (2011) 64-76. [15] Kang, S.T., Kim,J.K., The relation between fibre orientation and tensile behaviour in an Ultra High Performance Fibre Reinforced Cementitious Composites (UHPFRCC), Cement and Concrete Research, 41 (2011) 1001-1014. [16] Ferrara, L., Ozyurt, N., Di Prisco, M., High mechanical performance of fiber reinforced cementitious composites - the role of casting-flow induced fiber orientation, Materials and Structures, 44 (2011) 109-128. [17] Rasband, W., ImageJ, National Institutes of Health, USA, (2008). [18] KamerwaraRao, C.V.S., Effectiveness of random fibres in composites, Cement and Concrete Research, 9 (1979) 685- 693. T