PSI - Issue 10

N. Nikoloutsopoulos et al. / Procedia Structural Integrity 10 (2018) 141–147 N. Nikoloutsopoulos et al. / Structural Integrity Procedia 00 (2018) 000 – 000

146

6

criterion. Any strengthening technique that exceeds the requirement shear stress and its cost is less than the average is considered to be economically advantageous.

50.0

Theoretical Results (k Ν) Experimental Results (k Ν)

Theoretical Results (k Ν)

Experimental Results (k Ν)

50.0

40.7 Theoretical Results (k Ν) Experimental Results (k Ν)

50.0

42.7

35.6 38.8 40.6 35.7

38.8 38.2

40.0

35.6

40.0

35.7

35.2

30.5 32.2

40.0

30.5 30.7 5.6 35.7

30.2

32.2

30.2 30.5 30.7

29.3

(30,2 KN)

27.7

27.6

30.2 kN

29.3

(30,2 KN)

27.7

27.6

30.0

32.2

30.0

30.2

26.6

29.3

(30,2 KN)

20.7 27.7

23.2 27.6

25.9 27.2

26.6

21.2

30.0

21.2

26.6

20.7

20.4

20.0

15.5

21.2

20.7

20.0

13.8

15.5

13.8

20.0

15.5

13.8

10.0

10.0

10.0

Strengthening contribution [kN]

0.0

Strengthening contribution [kN]

0.0

A.1

A.2

B.1

B.2

C.1

C.2

Strengthening contribution [kN]

A.1

A.2

B.1

B.2

C.1 E.2.b

C.2

0.0

Strengthening Techniques E.1.a E.2.a

D.1

D.2

E.1.b

F.1

F.2

Strengthening Techniques B.1

A.1

A.2

B.2

C.1

C.2

Strengthening Techniques

Fig. 6. Theoretical and experimental results of strengthening contribution with rope techniques.

Table 2. Presentation of total cost and the requirement of drilling operation.

Strengthening Contribution (kN)

Drilling Operations

Code

Total Cost (€)

A.1 A.2 A.3 B.1 B.2 B.3 B.4 C.1 C.2 C.3 D.1 D.2

22.42 30.75 27.63 12.25 18.50 15.38 24.75 29.09 35.34 32.22 74.23 30.49 46.99 22.66 38.32 28.44 42.30 127.22

30.18 35.68 45.68 21.18 27.68 43.18 45.68 20.68 32.18 44.18 30.68 40.60 30.68 38.18 23.18 27.18 35.18 42.68

Yes Yes Yes

No No No No

Yes Yes Yes Yes Yes

E.1.a E.2.a E.1.b E.2.b

No No No No No No

F.1 F.2

Referring to strength contribution, the highest results are at A.3 and B.4 techniques. Both techniques over exceed the required shear force of 30.2 kN, which is required but this over exceeding should be further studied because it