Issue 61

M.E. Kerkar et alii, Frattura ed Integrità Strutturale, 61 (2022) 530-544; DOI: 10.3221/IGF-ESIS.61.36

c) Exceptional case

0,00 0,05 0,10 0,15 0,20 0,25 0,30 0,35 0,40 0,45 0,50 0,55 0,60 0,65 0,70 0,75 0,80 0,85 0,90 0,95 1,00

Pobability of failure

C19

C20

C21

C22

C23

C24

C25

C26

C27

C28

C29

C30

C31

C32

C33

C34

C35

C36

C37

C38

C39

C40

C41

C42

C43

C44

C45

C46

Scenarios

Boussiaba

Oued Fodda

Koudiat A

Beni Hraroune

Hamiz

Tichy haf

Figure 11: The histogram of failure probabilities for different load request scenarios If we consider that the probability for each scenario C i (from C 1 to C 64 ) to happen is P Ci = 1, the number of scenarios giving a likely probability ( P f > 0.01) will be:

64  i 1 

(11)





N

P

(

0.01)

f P

f Ci

Likely

The ratio between N P f Likely and the total number of scenarios will be:

N

f P

(12)



R

Likely

Likely

64

Figure 12: Ratio of cases giving a likely probability and the total number of scenarios for the dams studied According to these results we can see that the R Likely of the Tichy Haf dam is 0.95 it is the most important among the dams studied, this majority is expressed by the type of dam (arch gravity dam) and its stability is not only

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