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By: Sonali Gopinath Ingole and R. S. Londhe Londhe
ABSTRACT- Designing and constructing high-rise buildings requires structural systems that can efficiently resist lateral forces caused by wind and seismic activity. Outrigger systems are commonly used in tall structures to increase lateral stiffness, minimize building drift, and better use structural materials. This research examines the performance of multi-storey buildings incorporating various outrigger configurations, including traditional outriggers, belt trusses, deep beams, and shear wall systems. A response spectrum analysis is carried out to assess how different setups influence structural behavior. Key parameters such as the number, placement, and type of outriggers are analyzed concerning their impact on lateral displacement, base moment at the core, and the redistribution of loads. Multi-objective optimization methods, such as Pareto front techniques, are applied to determine design strategies that balance structural performance and architectural limitations. The findings show that strategically positioned outriggers significantly enhance stiffness and reduce drift, while also acknowledging the compromises required for integrating elements like mechanical floors or refuge areas. Overall, the study offers practical recommendations for optimizing outrigger systems to improve high-rise building performance under lateral loading conditions.
Citation:
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