TY JOUR TI EXPERIMENTAL STUDY OF THE SLIP FACTOR STEEL BOLTED CONNECTIONS KW coefficient of static friction KW steel high-strength bolted connection; faying surface slip JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Vasilkin, A.A. PY 2025 IS 10 PB Belgorod State Technological University named after V.G. Shukhov