REVIEW PAPER ON IMPACT OF CONNECTION DETAILING ON PROGRESSIVE COLLAPSE: BOLTED VS. WELDED JOINTS IN STEEL FRAMES

Abstract

The increasing demand for tall and slender structures in modern architecture has necessitated the development of efficient lateral load-resisting systems. Among these, steel Diagrid systems have emerged as a highly effective solution due to their geometric efficiency, structural rigidity, and architectural flexibility. This study focuses on the optimization of steel diagrid systems to enhance their performance under seismic and wind loads. A parametric analysis is conducted by varying diagrid angles, member sizes, and spacing to evaluate their impact on structural Behavior, including lateral stiffness, drift control, and base shear. Advanced finite element modelling and dynamic analysis methods, such as response spectrum and time history analyses, are employed to simulate realistic loading conditions. Optimization techniques, including genetic algorithms and multi-objective optimization, are used to identify the best-performing configurations in terms of strength, stability, and material efficiency. The results demonstrate that optimized diagrid configurations can significantly improve the lateral performance of tall buildings, reduce material consumption, and enhance seismic resilience. The findings provide valuable insights for structural engineers and designers aiming to achieve sustainable and high-performance tall building designs.

The increasing demand for tall and slender structures in modern architecture has necessitated the development of efficient lateral load-resisting systems. Among these, steel Diagrid systems have emerged as a highly effective solution due to their geometric efficiency, structural rigidity, and architectural flexibility. This study focuses on the optimization of steel diagrid systems to enhance their performance under seismic and wind loads. A parametric analysis is conducted by varying diagrid angles, member sizes, and spacing to evaluate their impact on structural Behavior, including lateral stiffness, drift control, and base shear. Advanced finite element modelling and dynamic analysis methods, such as response spectrum and time history analyses, are employed to simulate realistic loading conditions. Optimization techniques, including genetic algorithms and multi-objective optimization, are used to identify the best-performing configurations in terms of strength, stability, and material efficiency. The results demonstrate that optimized diagrid configurations can significantly improve the lateral performance of tall buildings, reduce material consumption, and enhance seismic resilience. The findings provide valuable insights for structural engineers and designers aiming to achieve sustainable and high-performance tall building designs.