Optimal Grid Geometry of Diagrid Structures for Tall Buildings

The use of diagrid structural systems for tall building design has continued to increase. Characteristics and stiffness-based preliminary design methodology of diagrid structures are discussed. The design methodology is applied to a set of diagrid structures, 40, 50, 60, 70, and 80 stories tall. The diagrid structure of each storey height is designed with diagonals placed at various uniform angles as well as gradually changing angles along the building height in order to determine the optimal uniform angle for each structure with a different height and to investigate the structural potential of diagrids with changing angles. Based on these design studies, design guidelines are provided for the optimal configuration of the diagrid structure grid geometry within a certain height range.