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28
IBRACON Structures and Materials Journal • 2013 • vol. 6 • nº 1
Automation of the evaluation of bonded and unbonded prestressed concrete beams, according to brazilian
and french code specifications
Table 9 – Characteristics of the passive reinforcement layers
Layer
Height (cm)
Number of bars
2
Area (cm )
Date (days)
Ø (mm)
1
2
3
4
5
6
3.8
3.8
17
34
46
46
4
2
2
2
4
6
12.57
4.02
0.62
0.62
3.14
29.45
28
28
28
28
28
28
20
16
6.3
6.3
10
25
ment prestressing. Table 11 presents the coordinates of the four
segments of the parable used to draw the curved section of the
prestressing tendons. The initial stress value adopted for the pre-
stressing tendons was 147.9 kN/cm².
Table 12 presents the loading cases used for SLS evaluation. The
Table 10 – Characteristics of the active reinforcement layer
Layer
Height (cm)
Number of cables
2
Area (cm )
Date (days)
Ø (mm)
1
Variable
10
10.14
28
12.7
Table 11 – Coordinates of the segments
of parabolic profile
Position
Section
Height (cm)
Coordinates of the segments 1, 2, 3 e 4
1
2
3
4
5
6
7
8
9
1
10
14 –15
17
18
19
21 – 22
26
35
31
20.8
14.5
6.2
3.4
6.2
14.5
20.8
31
Figure 31 – Representation of the parabolic
profile along the element (layer 1)
applied loading was calculated and reduced according to the load
combination required for service evaluation as determined in each
norm. In the SLS-W evaluation, a distributed load of 24 kN/m (fre-
quent combination) was considered for the Brazilian norm and of 33
Figure 32 – Properties of materials
(Brazilian code specification)