In this study, the effect of inclusion of single fiber and binary, ternary and quaternary fiber hybridization on the bond performance of high strength self-compacting concrete (SCC) was investigated and 12 beam specimens having lap-spliced reinforcing bars in tension at the mid-span were designed. Four different fibers were used with different hybridizations. Fiber reinforced concrete beams demonstrated higher failure loads with a greater number of cracks. Especially the specimens with ternary fiber hybridization showed the best performance that the ultimate load resistance was 60% higher than that of the specimen without fiber. After splitting failure, the beam specimens with binary hybridization of macro steel fiber and polyvinyl-alcohol (PVA) fiber and also, the specimens with ternary hybridization of macro steel fiber, micro steel fiber with 13 mm in length (OL 13/.16) and PVA fiber showed a gradually drop in performance with increasing deflections. Besides, results indicate that the least improvement in bond strength was observed in the specimen having quaternary fiber hybridization of macro steel fiber, OL 13/.16 and micro steel fiber with 6 mm in length (OL 6/.16) and PVA fiber. The bond strength results were also compared with the ones calculated from the existing prediction equations. It was found that Zuo and Darwin and Esfahani and Rangan equations gave better results than the equations of Orangun et al. and ACI 318 on the hybrid fiber reinforced SCC. Based on the results, it was indicated that in these proposals, a new parameter was necessary for the fiber content so in this study, a new empirical equation was derived by using fiber reinforced index for fiber reinforced SCC. The proposed equation gave better estimation in the specimens with single fiber and binary and ternary fiber hybridization.

在这项研究中，研究了单纤维和二元、三元和四元纤维杂化对高强度自密实混凝土 (SCC) 粘结性能的影响，并研究了 12 个在中部受拉搭接钢筋的梁试件。 -span 被设计。四种不同的纤维用于不同的杂交。纤维增强混凝土梁表现出更高的破坏载荷和更多的裂缝。尤其是三元纤维杂化的试件表现出最佳性能，极限抗负载能力比不含纤维的试件高60%。分裂失败后，粗钢纤维和聚乙烯醇（PVA）纤维二元杂化的梁试件，粗钢纤维三元杂化的试件，长度为 13 毫米的微钢纤维 (OL 13/.16) 和 PVA 纤维的性能随着挠度的增加而逐渐下降。此外，结果表明，在具有粗钢纤维、OL 13/.16 和长度为 6 毫米的超细钢纤维 (OL 6/.16) 和 PVA 纤维的四元纤维杂化的试样中，观察到的粘合强度的改进最小。结合强度结果也与根据现有预测方程计算的结果进行了比较。发现 Zuo 和 Darwin 以及 Esfahani 和 Rangan 方程比 Orangun 等人的方程给出了更好的结果。和 ACI 318 在混合纤维增强 SCC 上。根据结果​​，表明在这些建议中，纤维含量需要一个新参数，因此在本研究中，通过使用纤维增强 SCC 的纤维增强指数推导出新的经验方程。所提出的方程在具有单纤维和二元和三元纤维杂交的样品中给出了更好的估计。