Civil Engineering Reference
In-Depth Information
Case 1 (NEITHER FIBERS NOR STIRRUPS). Beams ordered by d
2.50
1600.00
CONSERVATIVE
2.25
1400.00
2.00
1200.00
1.75
1000.00
1.50
800.00
1.25
600.00
1.00
400.00
0.75
200.00
UNCONSERVATIVE
0.50
0.00
d (Reinforced beams)
d (Prestressed beams)
SM (EHE-08)
SM (MC2010)
SM (RILEM)
Case 2 (ONLY STIRRUPS). Beams ordered by d
2.00
1000.00
CONSERVATIVE
900.00
1.75
800.00
700.00
1.50
600.00
1.25
500.00
400.00
1.00
300.00
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
In
fl
uence of effective depth (d) on shear safety margins
8.8.2 In
fl
uence of the a/d Ratio
For the range 2.5
≤
a/d
≤
3.5, particular trends are not observed, independently of
the reinforcement type (
bers and/or stirrups).
8.8.3 In
fl
uence of the Concrete Compressive Strength, f
c
For all concrete beams, with different types of shear reinforcement, when concrete
compressive strength (f
c
) was higher than 70 MPa, Codes underestimate the shear
strength (Fig.
8.44
).
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