TY JOUR TI IMPROVEMENT OF STRUCTURES OF TOWER STRUCTURES AND THEIR NUMERICAL MODELING BY EXAMPLE OF WIND-DRIVEN PLANT TOWER KW HEU tower KW tower-type structure KW power line support KW finite element method KW computer modeling KW Mises strength theory JO Construction and Architecture AU Sabitov, L.S. AU Mailyan, L.R. PY 2021 IS 9 PB Publishing Center RIOR