TY JOUR TI Prediction of fatigue strength of steel structures under repeated variable loads KW fatigue strength KW steel structures KW repeated variable loads KW finite element method KW stress strain state KW Wohler curves KW Miner’s criterion KW fatigue failure KW durability prediction KW stress concentration JO Journal of Technical Research AU Bliznecov, A.S. AU Li, M.V. AU Pivkin, M.Y. AU Puchkin, D.K. PY 2025 IS 11 PB INFRA-M Academic Publishing LLC.