tesi A. Caggiano.pdf - EleA@UniSA - Università degli Studi di Salerno

1.1. Scientific framework and general overviewFigure 1.1: Steel fiber types proposed by ACI-544.1-96 [1996].and Ramli, 2011, 2012]. The experimental results on contoured double cantilever beamspecimens with steel and polypropylene FRC have been discussed by Banthia andNandakumar [2003]. Other relevant contributions regarding HyFRC with lightweightaggregates [Libre et al., 2011], high-volume coarse fly ash [Sahmaran and Yaman, 2007],RC beams with mixed fibers [Ding et al., 2010], HyFRC exposed to high temperatures[Chen and Liu, 2004, Ding et al., 2012] or self compacting HyFRC [Ding et al., 2009,Dawood and Ramli, 2010, Akcay and Tasdemir, 2012] have also been proposed withinthe scientific community.1.1.2 Mechanical behavior and characterizationSince fiber bridging mechanisms mainly take place under cracked regime of the concretematrix, the mechanical behavior of uncracked members is rather influenced by3