Shear Database and Study of the Parameters Influencing Shear Behavior - On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete - page 159

8.6.1 In fl uence of the Residual Tensile Strength, f R3

Figure 8.18 shows the SM of all Codes versus the residual tensile strength f R3 , it can
be observed that for reinforced beams the most conservative is the EHE while, for
prestressed beams the RILEM is the safest, the MC2010 is the most balanced Code,
as it maintains the same SM levels for reinforced and prestressed beams.

2.00 12.00

CONSERVATIVE

1.75 10.00

1.50 8.00

1.25 6.00

1.00 4.00

0.75 2.00

UNCONSERVATIVE

0.50 0.00

fr3 (Reinforced beams) fr3 (Prestressed beams) SM (EHE-08) SM (MC2010) SM (RILEM)

Fig. 8.18 Beams transversally reinforced with bers + stirrups. SM represented versus f R3 (MPa)

8.6.2 In uence of the Longitudinal Reinforcement

Percentage,

fl

ρ l

In Fig. 8.19 it can be observed that reinforced beams with 2 % and

f R3 < 1.5 MPa are all in the side of unsafety (SM < 1). Reinforced beams with

ρ l ≤

2.00 4.00

CONSERVATIVE

3.50

1.75

3.00

1.50

2.50

1.25 2.00

1.50

1.00

1.00

0.75

0.50

UNCONSERVATIVE

0.50 0.00

rho (Reinforced beams) rho (Prestressed beams) SM (EHE-08) SM (MC2010) SM (RILEM)

Fig. 8.19 Beams transversally reinforced with bers + stirrups. SM represented versus ρ (%)