Shear Database and Study of the Parameters Influencing Shear Behavior - On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete - page 174

Fig. 8.29 Means and 95.0 %
LSD intervals
(Brite Series 3-II)

8.7.5 Study of Size Effect on Shear

In this subsection, the beams of Chap. 5 , tested at the University of Brescia (Italy),
are statistically analyzed. In Table 8.27 , the constant variables within the same
Series are indicated. In Table 8.28 , 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: d,
f R3 , and Code, having all factors three levels. So, the number of complete cases is:
№ complete cases =( № of levels) № of factors =3 3 =27complete cases
The ANOVA table (Table 8.29 ) shows that all main effects and two interactions
have signi cant differences since their p-values are less than 0.05.

Bymeans of LSD intervals (Fig. 8.30 ), in this Series, it can be observed that, for the
effect

cant differences between the three levels,
being the SM corresponding to d = 440 mm clearly different from the other two. SM
increases when increases the

“ effective depth (d) ” , there are signi

ber content, but there are not signi cant differences