Table 7 Effect of changing cutouts positions on ultimate load.
From: Strengthening of Cutouts in Existing One-Way Spanning R. C. Flat Slabs Using CFRP Sheets
Section | Location | Model | Ultimate load, Pu (kN) | Pu/Pu (s0) | Moment of resistance Mr (kNÂ m) | Ult.Ld. after strengthening, Pu (kN) | % increase ultimate load |
|---|---|---|---|---|---|---|---|
1 | At support (M1 = 19.5 kN m) | S0 | 65.0 | 1.00 | 19.0 | Reference | – |
2 | Hogging zone (M2Â =Â 17.9Â kNÂ m) | S1 | 55.2 | 0.85 | 16.0 | S3Â =Â 60.0 | 8.7 |
S2 | 42.0 | 0.65 | 11.7 | S4Â =Â 45.8 | 9.0 | ||
3 | Quarter span (M3 = 14.6 kN m) | S1′ | 63.0 | 0.97 | 16.0 | S3′ = 63.6 | 1.0 |
S2′ | 55.0 | 0.85 | 11.7 | S4′ = 59.4 | 8.0 | ||
4 | Mid span (M4 = 11.3 kN m) | S1′′ | 64.2 | 0.99 | 16.0 | S3′′ = 64.8 | 1.0 |
S2′′ | 63.6 | 0.98 | 11.7 | S4′′ = 64.2 | 1.0 |