Shear Database and Study of the Parameters Influencing Shear Behavior - On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete - page 150

Table 8.4 Summary of
statistics of reinforced beams
without shear reinforcement

Reinforced beams (plain concrete)
EHE-08 MC2010 RILEM

Minimum 0.70 0.82 0.70

Maximum 1.52 1.66 1.52

Average 1.12 1.21 1.11

Standard deviation 0.21 0.24 0.21

CoV (%) 18.38 19.45 18.74

5th percentile (%) 0.86 0.87 0.80

95th percentile (%) 1.47 1.59 1.47

8.3.6 General Behavior of Codes for Beams Without Shear
Reinforcement

By determining the main statistics corresponding to the reinforced beams
(Table 8.4 ), it is observed that all Codes (EHE08, MC2010 and RILEM) have
coef cients of variation (CoV) in the same order. The 5th percentile values for all

Codes are not very close to the unit, this fact makes not possible to ensure the
designation of safe predictions. Analyzing
Table 8.5 , it is clear that all Codes are conservative for prestressed beams,
EHE08 and RILEM present similar CoV, being the RILEM more adjusted for this
subset. MC2010 have a great CoV, but it is due to only one point with a very high
SM which corresponds to a stress ˃ c with a value around 10 MPa since, as stated, it

appears that the MC2010 underestimates the effect of prestressed giving high values
of SM when

˃ c ≥ 10 MPa.

Table 8.5 Summary of
statistics of prestressed beams
without shear reinforcement

Prestressed beams (plain concrete)
EHE-08 MC2010 RILEM

Minimum 1.28 1.22 1.13

Maximum 1.88 2.37 1.65

Average 1.49 1.51 1.34

Standard deviation 0.22 0.40 0.22

15.07 26.38 16.63

CoV (%)

5th percentile (%) 1.28 1.23 1.13

95th percentile (%) 1.83 2.16 1.64