TY JOUR TI RESEARCH OF STRENGTH OF CONTACT OF THE PLASTIC PIPE ANDCONCRETE WHEN CALCULATING PLASTIC PIPE CONCRETE STRUCTURES KW plastic-tube-concrete KW tube concrete KW triaxial compression KW tangential forces KW friction KW strength calculations of building structures JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Naumov, A.E. AU Shevchenko, A.V. AU Dolzhenko, A.V. AU Bodyakov, S.N. AU Gvasaliya, H.D. PY 2019 IS 4 PB Belgorod State Technological University named after V.G. Shukhov