Experimental Tests on Fibers Influence on the Size Effect on Shear - On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete - page 90

Fig. 5.21 Crack evolution for
beams H500 (loads in kN)

was also found in the smaller series: for samples H1000, ʸ ranged from 42 ° in the
reference element, while it was equal to 37 ° and 34 ° respectively for beams FRC50

and FRC75; for beams H500, ʸ was 41 ° ,39 ° and 32 ° , respectively for elements PC,

FRC50 and FRC75.
In the case of sample H1500 FRC50, the main shear crack was not recorded as it
developed much closer to the support than expected (i.e., it turned out to be external
to the gauge length).
To analyze the formation and subsequent propagation of shear cracks in a beam
of FRC, let ' s consider the beam FRC50 H1500. Figure 5.26 indicates the order of