“Fiber-reinforced concretes” are increasingly being used, among which steel fibers with stirrups are inevitably used. Since limited research has been conducted in this area, little is known about how SFRC beams with stirrups are designed. Only a few guidelines are embedded in ACI 318 for minimum shear reinforcement of SFRC beams. This study performed an experimental program to explore the combined effects of stirrups and steel fibers on the shear strength of SFRC beams. Thus, twenty beams with different fiber volume fraction, compressive strength of concrete and stirrups were fabricated and tested. A new equation was formulated for the shear strength of SFRC beams by employing the GP technique. This equation performed well in terms of accuracy compared to the experimental results and other equations proposed in previous works. Experimental and analytical results indicated that the combined effects of stirrups and steel fibers on the shear strength of SFRC beams are not identical to the total effects of applying them alone.

越来越多地使用“纤维混凝土”，其中不可避免地使用带有马stir的钢纤维。由于在该领域进行的研究有限，因此对带有箍筋的SFRC梁的设计知之甚少。ACI 318中仅嵌入了一些准则，以最小化SFRC梁的抗剪钢筋。这项研究执行了一个实验程序，以探索箍筋和钢纤维对SFRC梁抗剪强度的综合影响。因此，制造并测试了二十根具有不同纤维体积分数，混凝土和箍筋抗压强度的梁。利用GP技术为SFRC梁的抗剪强度制定了一个新的方程式。与实验结果和先前工作中提出的其他方程相比，该方程在准确性方面表现良好。