Performance of Hexagrid and Diagrid Structural Systems: A Review

Abstract

Construction of tall buildings is rapidly increasing all over the world. Land use efficiency is more for tall buildings compared with low rise building. For tall buildings the structural system which resists lateral load is more important than the structural system which resists gravity loads. In order to improve the performance of tall buildings against lateral loads structural systems like hexagrid and diagrid were recently introduced. Hexagrid structural system consists of multiple hexagonal grids at the exterior perimeter surfaces of the buildings. In hexagrid structural system axial stress of the members resists gravity and lateral loads. The members show no bending and they simply act in tension or compression which reduces the need of steel. Diagrid is is made up a series of triangulated truss system. Due to its triangulated configuration it can carry gravity loads as well as lateral forces. This structure is also effective in minimizing shear deformation as they carry lateral shear by axial action of diagonal members and bending is carried by the axial forces in the diagonals. This paper analyses the performance of hexagrid and diagrid structural systems.