TY JOUR TI DETERMINATION OF THE ELASTIC MODULUS OF CONCRETE IN REINFORCED CONCRETE BEAMS BY THE RATE OF VIBRATION DAMPING KW vibration-damping coefficient KW reinforced concrete beams without prestressing reinforcement KW modulus of elasticity of concrete KW non-destructive testing methods JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Abashin, E.G. PY 2023 IS 8 PB Belgorod State Technological University named after V.G. Shukhov