Initial compressive stress in concrete
: total initial tension reinforcement
: the total area of prestressed reinforcement,
: initial stretch stress of prestressing reinforcement prior,
Ag: total cross-sectional area horizontal spindles,
: stress at the time of transmission allows stress, MPa
tensile stress tension tensioned reinforcement (fpj) is not greater than 75% of the tensile strength of the reinforcing steel (FPU). Concrete compressive stress in tension because l reinforced brisket (fcgp) must be less than the compressive stress of the concrete allows transmission of stress at the moment (FCI). Hép compressive stress for the concrete at the time of transmission by 60% stresses the compressive strength of concrete allows transmission of stress at the moment (f'ci). Dochiu strength of concrete compression allows transmission of stress at 75% compressive strength of concrete design (f'c).
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