TY JOUR TI ACCOUNTING THE STEEL PROFILE IN THE CALCULATIONS OF THE LOADING CAPABILITY OF STEEL-CONCRETE BEAMS KW composite structures KW external reinforcement KW thin-walled steel profile KW bearing capacity KW strength JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Vinogradova, N.A. PY 2020 IS 4 PB Belgorod State Technological University named after V.G. Shukhov