Table 6 Effect of increasing CFRP number of layers and widths on ultimate loads.
From: Strengthening of Cutouts in Existing One-Way Spanning R. C. Flat Slabs Using CFRP Sheets
Model | Cutout size, mm | No. of layers | Layer width, mm | Area of CFRP layers, mm2 | Ultimate load (kN) | % increase ultimate load |
|---|---|---|---|---|---|---|
S1 | 200 × 200 | – | – | – | 55.2 | – |
S2 | 200 × 400 | – | – | – | 42.0 | – |
S3 | 200 × 200 | 1 | 100 | 13.0 | 60.0 | 8.7 |
150 | 19.5 | 62.4 | 13.0 | |||
200 | 26.0 | 63.0 | 14.1 | |||
2 | 100 | 26.0 | 63.0 | 14.1 | ||
150 | 39.0 | 65.2 | 18.1 | |||
200 | 52.0 | 67.2 | 21.7 | |||
3 | 100 | 39.0 | 64.8 | 17.4 | ||
150 | 58.5 | 69.0 | 25.0 | |||
200 | 78.0 | 71.4 | 29.3 | |||
S4 | 200 × 400 | 1 | 100 | 13.0 | 45.8 | 9.0 |
150 | 19.5 | 47.4 | 12.9 | |||
200 | 26.0 | 48.6 | 15.7 | |||
2 | 100 | 26.0 | 49.2 | 17.1 | ||
150 | 39.0 | 51.6 | 22.9 | |||
200 | 52.0 | 52.8 | 25.7 | |||
3 | 100 | 39.0 | 51.6 | 22.9 | ||
150 | 58.5 | 54.6 | 30.0 | |||
200 | 78.0 | 57.6 | 37.1 | |||
4 | 100 | 52 | 53.4 | 27.1 | ||
150 | 78 | 58.2 | 38.6 | |||
200 | 104.0 | 64.2 | 52.9 | |||
5 | 100 | 65.0 | 56.4 | 34.3 | ||
150 | 97.5 | 63.0 | 50.0 | |||
200 | 130.0 | 69.0 | 64.3 |