Civil Engineering Reference
In-Depth Information
Case 4 (STIRRUPS + FIBERS). Beams ordered by d
2.00
800.00
CONSERVATIVE
700.00
1.75
600.00
1.50
500.00
1.25
400.00
300.00
1.00
200.00
0.75
100.00
UNCONSERVATIVE
0.50
0.00
d (Reinforced beams)
d (Prestressed beams)
SM (EHE-08)
SM (MC2010)
SM (RILEM)
Fig. 8.42
(continued)
8.8.4 In
fl
uence of the Residual Tensile Strength, f
R3
For beams with only
bers as shear reinforcement, the SMs are generally higher
than the unit, with a high scatter (Fig.
8.45
). The scatter is smaller in beams with
both
bers and stirrups, but a lower number of results are available in the database
(Fig.
8.45
).
But fundamentally, it was evidenced that the shear should not rely solely on the
value of f
R3
for all types of FRC (with any type of
ber and any concrete com-
pressive strength), since residual strength for smaller crack opening (f
R1
) also
in
fl
uences the shear strength.
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