Environmental Engineering Reference
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(a)
35
PDF isoline (Plackett)
PDF isoline (Gaussian)
Limit state I
Limit state II
Limit state III
30
25
20
15
10
0
4
8
12
16
20
24
28
c (kPa)
(b)
35
PDF isoline (Frank)
PDF isoline (Gaussian)
Limit state I
Limit state II
Limit state III
30
25
20
15
10
0
4
8
12
16
20
24
28
c (kPa)
(c)
35
PDF isoline (No.16)
PDF isoline (Gaussian)
Limit state I
Limit state II
Limit state III
30
25
20
15
10
0
4
8
12
16
20
24
28
c (kPa)
Figure 2.12 Comparison of PDF isolines of shear strength parameters associated with different copulas for
ρ   = 0.8, COV c = 0.4 and COV ϕ = 0.2. (a) Plackett copula versus Gaussian copula, (b) Frank copula
versus Gaussian copula, and (c) No. 16 copula versus Gaussian copula.
 
 
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