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Case 3 (ONLY FIBERS). Beams ordered by f
cm
2.50
110
CONSERVATIVE
100
2.25
90
2.00
80
70
1.75
60
1.50
50
1.25
40
30
1.00
20
0.75
10
UNCONSERVATIVE
0.50
0
fcm (Reinforced beams)
fcm (Prestressed beams)
SM (EHE-08)
Case 4 (STIRRUPS + FIBERS). Beams ordered by f
cm
2.00
70
CONSERVATIVE
60
1.75
50
1.50
40
1.25
30
1.00
20
0.75
10
UNCONSERVATIVE
0.50
0
fcm (Reinforced beams)
fcm (Prestressed beams)
SM (EHE-08)
Fig. 8.44
(continued)
(Fig.
8.49
). In these beams, MC2010 underestimated the effect of prestressing. In all
Codes the SM decreased for prestressing stresses higher than 10 MPa (Fig.
8.49
).
8.9 Suggestions for Design Codes According to Shear
After analyze a large database consisting of 215 structural elements failing in shear,
and determined the expected shear strength according to three different Design
Codes, it was possible to evidence the role of the simple parameters and among
these, the ones that could be better evaluated.
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