الفهرس 
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Abstract
This thesis presents the results of thirteen shear tests carried out on simply supported rectangular beams to determine the shear behavior, and strength of steel fiber reinforced concrete beams, and the ability of steel fiber to be used as shear reinforcement instead of the conventional stirrups. All beams have the same cross-section of 150 x 300 mm, length of 2.20 m, average cube compressive strength (fcu = 42 N/mm2 ), and the ratio of longitudinal reinforcement (ρ = 1%). The beams were simply supported over a span of 2.0 m and tested under a single concentrated load applied at a distance of 0.65 m from one of the supports with a shear span to depth ratio (a/d) equal to 2.4 for all beams. The main variables studied were: the effect of fiber volume content (0, 0.5, 1.0, and 1.5%), fiber type (end-hooked or corrugated), and the presence of minimum stirrups. Beam deflection, steel strains, crack propagation, and failure modes were recorded for all the tested beams. The test results showed that the shear cracking, and the ultimate shear stress increased with the increase of fiber volume content. When steel fibers with a volume content of 1.5% were added to the beams with minimum stirrups, the brittle shear failure was changed to ductile flexure failure. Moreover, adding steel fibers to the concrete mix may sufficiently substitute the use of conventional web reinforcement for post-shear cracking behaviour. The experimental test results were compared with some empirical equations developed to estimate the shear strength of SFRC beams without stirrups. The comparison indicated that the equations proposed by Narayanan and Darwish 1987 and Kara 2013 provided the most accurate estimation when compared to the test results. In addition, an empirical equation was proposed to determine the shear strength of SFRC beams without stirrups based on the experimental program and this equation showed good agreement when calibrated against other experimental data taken from previous researches.