ULTIMATE SHEAR STRENGTH OF HFRC MODERATE DEEP BEAMS WITHOUT STIRRUPS

Abstract

This paper investigates the shear strength of Hybrid Fiber Reinforced Concrete (HFRC) moderate deep
beams without stirrups having span to depth ratio 2.0, 2.4, 3.0, 4.0. The 8 numbers of beams were tested. 4 numbers of
beams were tested to failure under two point symmetrical loading and 4 numbers of beams were tested to failure under
central point loading. A complete shear deformational behaviour 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.