Optimization Of Steel Diagrid Systems for Lateral Load Resistance Under Seismic and Wind Conditions

Abstract

The rapid growth of high-rise construction in contemporary architecture has increased the need for structurally efficient systems capable of resisting lateral forces effectively. Steel diagrid systems have gained significant attention as an innovative solution because of their triangulated configuration, which provides superior stiffness, efficient load distribution, and architectural adaptability.

This research investigates the performance optimization of steel diagrid structures subjected to seismic and wind actions. A detailed parametric study is carried out by modifying key design parameters such as diagrid inclination angle, member cross-sectional dimensions, and module spacing. The influence of these variables on structural response parameters including lateral displacement, inter-storey drift, stiffness, and base shear is systematically evaluated.

Finite element modelling techniques are employed to develop analytical models, and dynamic analyses such as response spectrum and time-history methods are performed to represent realistic loading scenarios. To achieve optimal structural performance, advanced optimization strategies including genetic algorithms and multi-objective optimization approaches are implemented. These methods help determine configurations that balance strength, stability, and material efficiency.

The study reveals that appropriately optimized diagrid arrangements significantly enhance lateral stiffness and seismic resistance while reducing overall material usage. The outcomes contribute practical guidance for structural engineers and designers in developing sustainable, resilient, and performance-oriented tall buildings.