Ultimate shear strength of Fibrous moderate deep beams without stirrups

This paper investigates the shear strength of Polypropylene Fiber Reinforced Concrete (PPFRC) moderate deep beams without stirrups having span to depth ratio 2.0, 2.4, 3.0, 4.0. The 16 numbers of beams were tested. 4 numbers of beams were tested to failure under two point symmetrical loading and 12 numbers of beams were tested to failure under central point loading. A complete shear deformational behavior along with load-deflection response, crack patterns and modes of failure is studied experimentally. Shear strength is evaluated using empirical equations proposed here in this work for estimation of ultimate shear strength of moderate deep beams without stirrups. Experimental results of ultimate shear strength are compared with theoretical results calculated from proposed equation proposed. The comparison shows that the equation proposed here provides the most accurate estimates of shear strength. In addition to concrete strength, the influence of other variation such as fiber factor, span to depth ratio, longitudinal steel ratio and size effect is considered in the proposed equation.