The study concerns the investigation of flexural behaviour of steel fibre reinforced concrete (SFRC) and conventional reinforce concrete (RC) beams incorporating steel fibre. Hooked-end steel fibres were used at the contents of 20 kg/m³, 40 kg/m³, 60 kg/m³, 80 kg/m³ and 100 kg/m³ in production of SFRC specimens and RC beams. Flexural tests were achieved on both SFRC and RC beams. Mechanical properties such as compressive strength, modulus of elasticity, flexural strength, toughness and toughness index were determined on SFRC specimens. Load–deflection curves were obtained from the beam flexural tests. First crack loads and flexural toughness of RC beams were also determined on RC beams. Steel fibres reduced the workability of fresh concretes. The mechanical performances of concretes and RC beams increased with the use of steel fibres. Compressive and flexural strengths of SFRCs have increased up to the 24.5% and 101.6% with increase in steel fibre, respectively. However, a decrease up to the 9.6% was observed in modulus of elasticity of SFRCs. Fibres have controlled the propagation and the widening of cracks. Therefore, considerable improvements were obtained on first crack loads, toughness and ductility of RC beams by addition of steel fibres. Maximum increases in first crack load and toughness of RC beams were 34.5% and 40.5%, respectively.

该研究涉及钢纤维混凝土 (SFRC) 和包含钢纤维的常规钢筋混凝土 (RC) 梁的弯曲行为的调查。钩端钢纤维以20 kg/m ³、40 kg/m ³、60 kg/m ³、80 kg/m ³和100 kg/m ³的含量使用在 SFRC 试样和 RC 梁的生产中。在 SFRC 和 RC 梁上都进行了弯曲测试。在 SFRC 试样上测定机械性能，如抗压强度、弹性模量、弯曲强度、韧性和韧性指数。载荷-挠度曲线是从梁弯曲试验中获得的。RC 梁的首裂载荷和弯曲韧性也在 RC 梁上确定。钢纤维降低了新拌混凝土的和易性。混凝土和钢筋混凝土梁的力学性能随着钢纤维的使用而增加。随着钢纤维的增加，SFRCs的抗压强度和抗弯强度分别提高了24.5%和101.6%。然而，观察到 SFRC 的弹性模量下降了 9.6%。纤维控制了裂纹的扩展和扩大。所以，通过添加钢纤维，RC 梁的初裂载荷、韧性和延展性得到了相当大的改进。RC 梁的初裂载荷和韧性的最大增加分别为 34.5% 和 40.5%。