TY JOUR TI MANAGEMENT OF FIRE RESISTANCE OF FERRO-CONCRETE DESIGNS VARIATIONAL OF STRUCTURE KW concrete KW fire resistance KW reinforced concrete structures KW durability KW heat resistance JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Ledenev, A.. AU Percev, V.. AU Kalach, A.. AU Zagoruyko, T.. AU Donec, S.. AU Kalach, E.. PY 2016 IS 1 PB Belgorod State Technological University named after V.G. Shukhov