TY JOUR TI ASSESSMENT OF THE RELIABILITY LEVEL OF STRENGTHENING OPTIONS FOR BUILDING STEEL STRUCTURES USING THE MATHEMATICAL MODEL OF THEIR UNINTERRUPTED OPERATION KW assessment of the level of reliability KW strengthening of building metal structures KW mathematical model of probability KW uninterrupted operation KW constructive safety JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Abakumov, R.G. AU Al-Sabaeei, A.K. PY 2021 IS 6 PB Belgorod State Technological University named after V.G. Shukhov