This analysis uncovers optimal diagrid angles improving displacement in various building geometries during seismic events.
The increasing demand for tall buildings in seismically active regions has necessitated innovative structural systems that combine architectural aesthetics with superior seismic performance. Diagrid structural systems have emerged as a promising solution, offering enhanced lateral load resistance through their triangulated geometric configuration. This research investigates the optimization of diagrid angles across various building geometries—square, rectangular, circular, and hexagonal—subjected to seismic loading conditions in high-risk zones. Through comprehensive dynamic analysis using finite element modeling, this study evaluates the structural behavior of diagrid systems with varying angles (ranging from 35° to 75°) under earthquake loads corresponding to Zone V seismic conditions. The research employs ETABS software for modeling and analysis, examining critical parameters including story drift, displacement, base shear, and acceleration responses. Results indicate that optimal diagrid angles vary significantly with building geometry, with square and rectangular structures performing best at 65-70°, while circular configurations show superior performance at 55-60°. The findings reveal that properly optimized diagrid angles can reduce lateral displacement by up to 35% and improve overall structural efficiency by 28% compared to conventional configurations. This research contributes valuable insights for structural engineers and architects designing tall buildings in earthquake-prone areas, providing evidence-based guidelines for selecting appropriate diagrid angles based on building shape and seismic requirements.
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Akhand et al. (2025) studied this question.