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424 LES PORTIQUES
50 L = H =10 b 50 L =10 ; H = 5 b
h1 h2 H 1.10 h1 h2 H 1.10
α α
1 1
40 Z =0.25 Z =0.25
Z =0.375 0.90 Z =0.375 0.90
Z =0.75 0.83 40 0.83
Z =0.75
30 0.80 0.80
20 0.70 0.70
Hα k=1 30 k=1
10 20
0.60 0.60
2 2
0.50 0.50
4 4
6 0.40 6 0.40
8 8
10 10
0.30 0.30
L
L
α Hα α 0.20 Hα α Hα α 0.20
0.17 0.17
10
bL b bb b Lb bb
0.10 0.10
L L
H H
0 k =∞
0 k =∞ 0 1 2 3 4 5 6 7 8 9 10
0 1 2 3 4 5 6 7 8 9 10
Figure 2.22.5. Figure 2.22.6.
20 L = H =10 20 L =10; H = 5
W h1 h2 W h1 h2
18 18
Hα α Hα α
16 16
bL b b Lb
14 14
12 12
k=1 k=1
2 2
4
10 84 10 86
6 10
8
7.5 10 ∞
6 ∞ 8
7.5
4 Z =0.75 Z =0.75
3.75 6
k=1 k=1 Z =0.375
2.5 Z =0.25
2 2 2
8 64
84 10
6 ∞
10
∞
∞ 10 8 6 4 2 k=1 Z =0.375 4 ∞ 10 8 6 4 2 k=1
Z =0.25 3.75
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 2.22.7. Figure 2.22.8.
