Effectiveness of stirrups and steel fibres as shear reinforcement

Influence of Fiber Properties on Shear Failure of Steel Fiber Reinforced Beams Without Web Reinforcement: ANN Modeling

“…To investigate the influence of the type of fiber, the fiber geometry code was kept constant for different shear spans to effective depth ratios. It is worth noting that a similar behavior for SFRC beams was reported by Oh (1999), andCucchiara et al (2004). They showed that the inclusion of an appropriate volume content of steel fiber could increase the ultimate shear strength more than the flexural strength of longitudinally reinforced SFRC beams, which alters the ductile shear failure mode into the flexure model of failure.…”

“…It is worth noting that considerable research effort has been undertaken to investigate the effects of incorporating steel fibers on the ultimate shear strength of SFRC beams based on the fiber factor, which combines the fiber properties (type, length and aspect ratio). Few reported experimental investigations are available concerning the effect of the fiber volume content on the ultimate shear strength of SFRC with or without web reinforcement (Lim and Oh 1999;Kwak et al 2002;Cucchiara et al 2004). In addition, very few researchers have investigated the influence of the individual fiber properties on the ultimate shear strength of SFRC beams without web reinforcement (Dinh 2009).…”

“…In this study, the experimental data utilized to train and test the performance of ANN-10 were the experimental test results of 70 SFRC beams collected from 11 published reports (Roberts and Ho 1982;Swamy and Bahia 1985;Lim et al 1987;Swamy et al 1993;Tan et al 1993;Adebar et al 1997;Lim and Oh 1999;Kwak et al 2002;Cucchiara et al 2004;Parra-Montesinos 2006;Dinh 2009) as given in Table 1. The collected data included: 1) G (the fiber geometry code, which is 1 for straight, 2 for crimped, 3 for hooked fibers), 2) f V (the fiber volume content), 3) It should be noted that the cylindrical compressive strength of concrete was evaluated as 80% of the cubic compressive strength.…”

Shear behavior of steel fiber reinforced concrete using full-field displacements from digital image correlation

“…Methods of reducing steel congestion, which provide the required capacity and ductility have often involved the use of fiber reinforcement in concrete. A survey of literature indicates that there is an increase in the load carrying capacity and ductility with the addition of steel fibers [1][2][3][4][5][6][7][8][9][10][11][12]. ACI 318 (2008) [13] allows the usage of steel fibers as minimum shear reinforcement.…”

“…Researchers have modified the concrete contribution term to propose the shear strength expression for fiber reinforced concrete. These proposed equations takes into account major factors responsible for shear behavior which includes shear span to depth ratio, percentage of longitudinal reinforcement, and other factors include volume of fibers, fibers aspect ratio, fiber geometry, fiber tensile behavior and also concrete matrix properties [1][2][3][4][5][6][7][8][9][10][11][12] [17]. All the proposed equations are empirical relations estimated from the experiments on steel fiber reinforced concrete beams and few on other types of fibers.…”