Experimental Tests on Hollow Core Slabs Made with FRC - On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete - page 138

Fig. 7.18 Shear safety margins of HCS with web shear tension failure (Series II)

Fig. 7.19 Precrack in fl uence on shear strength for HCS with a/d = 3.4

observed that the FRC slabs which had a shear-tension failure were over Kani ' s

valley. Also, [ 12 ] those with shear- fl exure failures had fl exural capacities greater

than expected, according to Kani s valley [ 12 ]. These results agree with Imam et al.

[ 13 ], who suggested that the region of diagonal failure disappears completely in
Kani

'

'

s valley when increasing ber amount and ef ciency.

In this way, use of bers is a possible solution to overcome shear failure since

bers are capable of increasing element strength to its full fl exural capacity.