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

7.5. Closing remarksthe experimental campaign (to see Chapter 2). The load-crack opening responses ofSFRC beams emphasize the significant influence of the fiber reinforcement on thepeak strength and the post-peak behavior. Fiber bridging effects on the pre-crackedconcretes are well simulated by the considered numerical approach with the proposednon-linear separation law for SFRC.The results of these numerical analyses demonstrate that the model leads to accuratesimulations of the SFRC performance in terms of both peak strength and post-peakductility of failure processes under mode I type of fracture, when different fiber typesand contents are considered.7.5 Closing remarksThe four-point bending behavior of notched SFRC beams has numerically been investigatedand compared against experimental results on four-point bending tests. Twodifferent amounts of steel fibers are considered and modeled at a numerical standpoint.A novel stress-crack opening model, based on a hinge-crack approach alreadyavailable in the scientific literature, has been employed to reproduce and simulate theexperimental results proposed in an other chapter of this thesis. As for the interfaceformulation, originally employed for meso-mechanical analyses as proposed in Chapter6, the model has been based on the explicit modeling of the interaction betweenconcrete and steel fibers. The numerical predictions, compared with the experimentalmeasures, demonstrate the soundness and capability of the model to reproduce themechanical response of SFRC components.151