Shear Database and Study of the Parameters Influencing Shear Behavior - On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete - page 167

2.8

SM = 1.5

2.1

1.9

1.7

1.5

SM = 1.3 1.3

1.1

0.9 1.4

0.7

0.5 0

1.49
3.05

SM = 1.1

f R3 (MPa)

2.8

0

4.85

1.4

0 1.49 3.05 4.85

0

A sw /s (cm 2 /m)

f R3 (MPa)

Fig. 8.23 Influence of the interaction between f R3 and A sw /s in the SM according to RILEM

uence of the interaction of f R3 and A sw /s on the safety margins (SM),
according to the EHE08, MC2010 and RILEM, are plotted respectively in
Figs. 8.21 , 8.22 and 8.23 . In each of these

The in fl

gures, two perspectives are represented.
In the left picture a surface chart and, on the right, the same graph is represented as
a topographic map indicating in each isoline (also called contour line) its corre-
sponding SM value. In this Series, in particular, Codes are safer for greater amounts
of transverse reinforcement; this trend is detected for all f R3 values. It is illogical
that the Codes are more conservative with increasing the amount of transverse
reinforcement. However, since results from this series do not provide a rm con-

clusion, more research is required on this topic.

8.7.3 Brite Series 2

In this subsection, the Series 2 of the Subtask 4.2 — Trial Beams in Shear of Brite-
Euram project [ 5 ] are going to be analyzed. This Serie 2 was carried out in the
Katholieke Universiteit Leuven (KUL) by Dupont D. and Vandewalle L.In
Table 8.18 the constant variables within the same Series are indicated.
In Table 8.19 , the input data for the ANOVA analysis are presented, differencing
the factors (independent variables) of the dependent variable (safety margin, SM)
for all these subsections. In this case the three factors are: f R3 ,

ρ l and Code, having
the factor Codes three levels and, the other two factors, two levels. So, the number
of complete cases is:

of levels) № of factors =2 2 3 1 =12complete cases № complete cases =( № ×

Table 8.18 Constant
variables between the beams
within the same series (Brite
Series 2)

Constant variables
Cross-section 200 × 300 mm: Rectangular reinforced (no

prestressed) beams
No stirrups
a/d = 2.5
4 point test