Abstract: The seismic performance of tall buildings relies heavily on the choice of lateral load-resisting systems. Diagrid and hexagrid structural systems have gained prominence due to their efficient load transfer mechanisms, geometric rigidity, and architectural versatility. This review paper synthesizes insights from ten core research studies to examine the comparative seismic behavior of diagrid and hexagrid structures under earthquake loads. Key findings highlight reductions in lateral drift, enhanced energy dissipation, and optimized material usage in diagrid and hexagrid configurations, contributing to improved seismic resilience in high-rise steel structures. The paper also identifies modeling practices using ETABS and response spectrum methods commonly applied in previous studies. Finally, it outlines research gaps and recommends areas for future exploration, particularly focusing on hybrid grid systems and optimization under varying seismic conditions for sustainable tall building design.

Keywords: Diagrid structures, Hexagrid structures, Seismic analysis, Tall steel buildings, Lateral drift reduction, Response spectrum method, ETABS modeling, Structural efficiency.

| DOI: 10.17148/IARJSET.2025.12732