Analysis of Proposed Diagrid Geometry Using Golden Ratio in Non-linear Regime of Material

Abstract

Lateral loads are critical in the design of high-rise structures. The buildings need to have high stiffness and must be able to resist lateral deformations and torsional rotations without having discomfort to the user. Diagrid structural system is one of the systems used in resisting lateral forces. In this study, diagrid geometry is generated using the ‘Golden Ratio’ concept and used to model 40, 50, and 60 story structures. Two more diagrid schemes are modeled to compare the results. The diagrid members are designed, and optimized sections are provided by performing iterations with different values of ‘s’ which is the ratio of lateral displacement at the top due to bending and due to shear, and a constant ‘α’. The structural performance of the proposed diagrid system is represented in terms of the time period, lateral stiffness, and drift ratio. The non-linear behavior of diagrids is studied by performing pushover analysis up to the point when one or more members reach a collapsed state. Proposed diagrid geometry shows better results than the other two diagrid schemes. Concluding remarks have been made regarding diagrid geometry, the design of diagrid members, the effectiveness of the Golden Ratio in diagrid geometry, and the non-linear behavior of diagrids. Keywords: Golden Ratio, diagrid structures, drift ratio, lateral stiffness, non-linear analysis, material non-linearity