OPTIMAL DIAGRID ANGLE TO MINIMIZE DRIFT IN HIGH-RISE STEEL BUILDINGS SUBJECTED TO WIND LOADS

Nowadays, tending to use super high-rise steel buildings has increased the need for finding efficient and economical lateral load resisting systems. The diagrid structural system is widely used for medium- and super-high-rise buildings due to its structural efficiency. The aim of this study was to find the optimal diagrid angle to minimize the lateral drift in high-rise building. Five different diagrid angle configurations (27o, 45o, 56o, 72o, and 81o) have been considered for 24, 48 and 72-storey steel buildings. The results were tabulated by performing finite element analysis using ETABS version 15 in the form of lateral displacement and storey drift. It is shown that the optimal diagrid angle is smaller than 56o for 24-storey model, and between (56o- 72o) for 48-storey model, and 72o for 72-storey model.