Table 3 Details of tested beam specimens.
From: Balanced Ratio of Concrete Beams Internally Prestressed with Unbonded CFRP Tendons
Specimens | Prestressing reinfocement ratio \( \rho_{pf}^{U} /\rho_{pfb}^{B} \) | Initial prestrssing f pfi /f pfm | Loading type, L sp (mm) | Reinforcement | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Concrete compressive strength, \( f_{c}^{'} \) (MPa) | Unbonded FRP tendons | Bonded reinforcing bar | ||||||||
Types | Diameter (mm) | A pf (mm2) | Types | Diameter (mm) | A bf (mm2) | |||||
RU50 | 0.53 | 0.5 | 4-point (900) | 35 | CFCC | 10.5 | 55.7 | Steel | 6.0 | 63.2 |
RU70 | 0.37 | 0.7 | 4-point (900) | 35 | CFCC | 10.5 | 55.7 | Steel | 6.0 | 63.2 |
RO50 | 1.51 | 0.5 | 4-point (900) | 35 | CFCC | 7.5 | 30.4 | Steel | 6.0 | 63.2 |
CFCC | 15.2 | 113.6 | ||||||||
RO55 | 1.85 | 0.55 | 4-point (900) | 40 | DWC | 9.5 | 70.9 | CFRP | 6.0 | 84.9 |
TB45 | 0.84 | 0.45 | 4-point (1200) | 40 | DWC | 9.5 | 141.8 | CFRP | 6.0 | 56.6 |
TO45 | 1.36 | 0.45 | 4-point (1200) | 40 | DWC | 9.5 | 70.9 | CFRP | 6.0 | 56.6 |
DWC | 9.5 | 141.8 | ||||||||