TY JOUR TI STRESS-STRAIN STATE OF BENT REINFORCED CONCRETE ELEMENTS OF CONTINUOUS AND COMPOSITE CROSS-SECTION BASED ON A REFINED NONLINEAR CALCULATION METHOD KW reinforced concrete structures KW bendable element KW nonlinear calculation KW curvature KW quasi-homogeneous solid body KW out-of-design impacts JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Kryuchkov, A.A. PY 2022 IS 7 PB Belgorod State Technological University named after V.G. Shukhov