Fig. 9From: Balanced Ratio of Concrete Beams Internally Prestressed with Unbonded CFRP TendonsEffects of main parameter on ρ pfb and ɛ bf . a Concrete compressive strength (\( f_{c}^{'} \)). b Initial prestress (\( f_{pfi} /f_{pfm} \)). c Effective depth (d pf ). d Amount of bonded rebar (A bf ). e Relative distance between loading points, L p /L.Back to article page