TY JOUR TI ENERGY EFFICIENT BUILDING STRUCTURES BASED ON GRIDSHELL KW steel gridshell structures KW energy efficient enclosure KW 3D CAD model JO Construction and Architecture AU Buzalo, N.A. AU Versilov, S.O. AU Platonova, I.D. AU Tsaritova, N.G. PY 2020 IS 8 PB Publishing Center RIOR