From: Balanced Ratio of Concrete Beams Internally Prestressed with Unbonded CFRP Tendons
Types | Diameter (mm) | Effective area (mm2) | CFRP | Steel | |||
---|---|---|---|---|---|---|---|
f pfm or f bfm (MPa) | E pf or E bf (MPa) | É› pfm or É› bfm (%) | f y (MPa) | ||||
Tendons | CFCC | 7.5 | 30.4 | 1880 | 144,000 | 1.30 | – |
10.5 | 55.7 | 1880 | 144,000 | 1.30 | – | ||
15.2 | 113.6 | 1750 | 135,000 | 1.30 | – | ||
DWC | 9.5 | 70.9 | 2500 | 135,000 | 1.85 | – | |
Auxiliary bars | DWC | 6.0 | 28.3 | 2200 | 139,000 | 1.58 | – |
Steel | 6.0 | 31.6 | – | – | – | 420 | |
Stirrups | DWC | 6.0 | 28.3 | 2200 | 139,000 | 1.58 | – |
Steel | 6.0 | 31.6 | – | – | – | 420 |