PSI - Issue 47

Shakiba Zolfaghari et al. / Procedia Structural Integrity 47 (2023) 398–407 S. Zolfaghari et al./ Structural Integrity Procedia 00 (2019) 000–000

402

5

mm, it increased to 13.5 kN. That is, the optimum groove width corresponding to the groove depth of 15 mm is 15 mm (Fig. 1(c) and Table 3).

Groove depth = 10 mm

Groove depth = 5 mm

Groove depth = 15 mm

12,66

13,5

10 15 20

10,5 11 11,5 12 12,5 13

10 15

14,4

11,28 10,74

12,86

12,08

10,78

11,09

0 5

10,75

0 5

0

10

20

Maximum load (kN)

Maximum load (kN)

0

10

20

Maximum load (kN)

0

10

20

Groove width (mm)

Groove width (mm)

Groove width (mm)

a)

(b) (c) Fig. 1. Effect of groove width variation on the FRP-concrete bond performance: (a) groove depth = 5 mm; (b) groove depth = 10 mm; (c) groove depth = 15 mm.

Groove width = 5 mm

Groove width = 2.5 mm

13

10,2 10,4 10,6 10,8 11

10,78

12,66

12,5

12

9,85

9,4 9,6 9,8 10

11,28

11,5

9,52

11,09

Maximum load (kN)

11

Maximum load (kN)

0

2

4

6

8

0

5

10

15

20

Groove depth (mm)

Groove depth (mm)

(a)

(b)

Groove width = 15 mm

Groove width = 10 mm

14,4

12 12,5 13 13,5 14

10 12 14 16

13,5

10,75

10,74

12,86

0 2 4 6 8

12,08

Maximum load (kN)

Maximum load (kN)

0

5

10

15

20

0

5

10

15

20

Groove depth (mm)

Groove depth (mm)

(c)

(d)

Fig. 2. Effect of groove depth variation on the FRP-concrete bond performance: (a) groove width = 2.5 mm; (b) groove width = 5 mm; (c) groove width = 10 mm; (d) groove width = 15 mm.

At the groove width of 2.5 mm (groove depths of 2.5, 5, and 7.5 mm), with the increase of the groove depth from 2.5 to 5 mm, the bond maximum load increased from 9.85 to 10.78 kN and then by increasing the groove depth to 7.5