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 PB Publishing Center RIOR