Issue 61

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

Calculated P f

Optimized P f = Max [ P f FORM , P f HL , P f MC ]

Scenarios

P

P f HL

P f MC

f FORM

C 11 C 12 C 35 C 36 C 47 C 48

4.1x10 -4

4.1x10 -4

4.09x10 -4

4.1x10 -4

10 -7

10 -7

10 -7

10 -7

4.4x10 -3

4.61x10 -3

4.82x10 -3

4.82x10 -3

10 -7

10 -7

10 -7

10 -7

3.2x10 -3

3.35x10 -3

3.51x10 -3

3.51x10 -3

10 -7 10 -7 Table 3: P f of the Beni Harroun dam during the scenarios; C 11 , C 12 , C 35 , C 36 , C 47 , C 48 The application of the models was carried out on six (06) Algerian dams (Boussiaba, Oued Fodda, Beni Harroun, Koudiat Acerdoune, Hamiz and Tichy Haf), the characteristics of these dams are moved in Tab. 4. 10 -7 10 -7

Ratio foundation length/dike height (R)

Talus fruit

Type of concrete

Height of the dyke (m)

Foundation length (m)

Dams

Age of service

upstream downstream

Boussiaba

BCR

< 50 years old

0

0.725

50.67

37.63

0.74

Oued Fodda Koudiat Acerdoune Beni Harroun

BCR

50 to100 years old

0.1

0.675

101

67.5

0.67

BCV

< 50 years old

0.4

0.5

121

102

0.84

BCR

< 50 years old

0

0.8

118

93

0.79

Hamiz

Masonry

> 100 years old

0.25

0.5

50

47

0.94

Tichy Haf

BCR

< 50 years old

0

0.5

83.5

40

0.48

Table 4: Geometrical characteristics and service age of the dams to be studied

The following figure shows the failure probability histogram for the three load combinations; normal, exceptional and extreme, it gives us the most probable P f for each assumed scenario.

b) Extreme case

b) Normal 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

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

Pobability of failure

C1

C2

C3

C4

C5

C6

C7

C8

C9

C10

C11

C12

C13

C14

C15

C16

C17

C18

C47

C48

C49

C50

C51

C52

C53

C54

C55

C56

C57

C58

C59

C60

C61

C62

C63

C64

Scenarios

Scenarios

Boussiaba Oued Fodda Koudiat A Beni Hraroune Hamiz Tichy haf

Boussiaba Oued Fodda Koudiat A Beni Hraroune Hamiz Tichy haf

540