preliminary design methodlogy of diagrid structural sysytem

diagrid structural system is a particular form of tubular systems, which exterior columns replaced by diagonal members. this system contained of diagonal truss elements through the height of the structure. the stability and shear rigidity of diagrid system is due to axial performance of diagonal elements. this paper controls a simple methodology for analyzing the internal forces arising in the single diagrid module due to vertical and horizontal loads, the resisting mechanism of diagrid structures under gravity and earthquake loads is described. the methodology is applied to a diagrid structure. to this end, a 36-stroey diagrid structure without corner columns was designed, and then a comparative analysis carried out. the angle of diagonal elements through the height of the structure is considered 67.38 degrees and the plan of structure is square. internal forces due to gravity and lateral loads in diagrid elements showed enough correspondence between finite element analysis and hand calculation. the results showed that this methodology is useful for preliminary design and accessing the internal forces.