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<p>Diagrid structural systems are widely used in high-rise building design because of their greater lateral stiffness, material economy, and improved seismic performance. Unlike traditional framed buildings, diagrid systems avoid the requirement for vertical columns by employing diagonal sections to effectively distribute lateral pressures and increase structural stability. This research compares the seismic behavior of diagrid buildings with different angles to conventional framed structures in Seismic Zone 5, the highest seismic danger category. A G + 26 RC framed structure was analyzed using ETABS Software. One model was bare frame, while other models with diagrids at varying inclinations 39˚, 58˚,67˚, 73˚ and 76˚ were taken into consideration. Linear static analysis and linear dynamic analysis are performed. According to the results, diagrid systems outperform traditional frames in seismic performance, mostly as a result of their greater lateral stiffness and effective load path distribution. The configuration with a 58° diagrid angle exhibited the best performance among the models, with the shortest fundamental time period 2.886&#xa0;s, the lowest displacement 114.55&#xa0;mm, the lowest drift 2.48&#xa0;mm, and the largest base shear capacity 12,079&#xa0;kN. Even though the study is restricted to linear-elastic techniques, the findings support the use of diagrid systems as a high-performance seismic design solution, especially at moderate inclinations, and are compatible with real-world structural behavior.</p>

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Seismic behavior analysis of diagrid structures with different angles and conventional frames in seismic zone 5

  • 期刊论文

  • 发表日期：

    2025年8月20日

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  • Nayeemuddin Mohammed,
  • Shaik Abdulla,
  • Tahar Ayadat,
  • Andi Asiz,
  • Rajshekhar G. Rathod

摘要

Diagrid structural systems are widely used in high-rise building design because of their greater lateral stiffness, material economy, and improved seismic performance. Unlike traditional framed buildings, diagrid systems avoid the requirement for vertical columns by employing diagonal sections to effectively distribute lateral pressures and increase structural stability. This research compares the seismic behavior of diagrid buildings with different angles to conventional framed structures in Seismic Zone 5, the highest seismic danger category. A G + 26 RC framed structure was analyzed using ETABS Software. One model was bare frame, while other models with diagrids at varying inclinations 39˚, 58˚,67˚, 73˚ and 76˚ were taken into consideration. Linear static analysis and linear dynamic analysis are performed. According to the results, diagrid systems outperform traditional frames in seismic performance, mostly as a result of their greater lateral stiffness and effective load path distribution. The configuration with a 58° diagrid angle exhibited the best performance among the models, with the shortest fundamental time period 2.886 s, the lowest displacement 114.55 mm, the lowest drift 2.48 mm, and the largest base shear capacity 12,079 kN. Even though the study is restricted to linear-elastic techniques, the findings support the use of diagrid systems as a high-performance seismic design solution, especially at moderate inclinations, and are compatible with real-world structural behavior.