TY JOUR TI CONVERGENCE OF THE NUMERICAL DIAGRAM METHOD OF NONLINEAR CALCULATION OF CORE REINFORCED CONCRETE ELEMENTS KW reinforced concrete KW nonlinear deformation model KW diagram method KW deformation diagrams KW numerical method KW convergence JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Radaikin, O.V. AU Sabitov, L.S. AU Klyuev, S.V. AU Hassoun, M.S. AU Arakcheev, T.P. AU Darvish, A.. PY 2022 IS 7 PB Belgorod State Technological University named after V.G. Shukhov