Table 1 Test matrix.
No | Damage level | FRP strengthening | FRP orientation | F′c (N/mm2) | Opening size mm |
|---|---|---|---|---|---|
B1 | – | – | – | 39.3 | – |
B2 | – | – | – | 39.3 | 0.5d |
B3 | – | U wrap | Vertical | 39.3 | 0.5d |
B4 | 50% of B2 | U wrap | Vertical | 39.3 | 0.5d |
B5 | 50% of B2 | U wrap | Diagonal | 39.3 | 0.5d |
B6 | 70% of B2 | U wrap | Diagonal | 39.3 | 0.5d |
B7 | 70% of B2 | U wrap | Diagonal | 39.3 | 0.5d |