TY JOUR TI STATISTICAL SUBSTANTIATION OF CONCRETE AND STEEL FIBER REIN-FORCED CONCRETE STRENGTH KW design strength of concrete KW steel fiber reinforced concrete KW tensile strength KW fixed formwork JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Gorbunov, I.A. AU Kapustin, D.E. PY 2019 IS 4 PB Belgorod State Technological University named after V.G. Shukhov