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LES PORTIQUES 407
70 L = H = 10 0.70 80 L =10 ; H = 5 b
h1 h2 b h1 h2 0.80
α H 0.65 α
Hα α Hα α H
60 0.60 70 0.75
Z =0.25 b Lb 0.57 bLb
Z =0.375 Z =0.25 0.70
0.55 60 Z =0.375
50 0.65
Z =0.75 0.50 Z =0.75
0.46 0.60
0.57
0.45
0.55
0.50
0.40 50 0.46
0.45
40 0.36
0.35 0.40
40 0.36
0.30 0.35
30 0.26 0.30
0.25
30 0.26
0.25
0.20
20 0.20
0.15 20
k=1 0.15
k=1
2 0.10
10 2 0.10
4 10
6 4 0.05
6
8 0.05 10 8
10
LL
H H
∞
0 k =∞ 0
0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10
Figure 2.19.9. Figure 2.19.10.
20 L = H =10 20 L =10; H = 5
W h1 h2 W h1 h2
18 18
Hα α Hα α
16 16
bLb bLb
14 14
12 12
k=1 k=1
10 2 10 2
8 8 4 864
7.5 6 10
6 10
4 ∞ 8 ∞
3.75 7.5
2.5 Z =0.75 Z =0.75
2
k=1 k=1 Z =0.375
2 Z =0.25
6 2
8 64 ∞ 86 4
10 10
∞ ∞
4
3.75
∞ 10 8 6 4 2 10 8 6 4 2 k=1
k=1 Z =0.375
Z =0.25 2.5
2
LL
HH
00
0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10
Figure 2.19.11. Figure 2.19.12.
