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.

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1. Kavyashree, Dr. Shantharama patil (2022), “Robust controller design for performance enhancement of outrigger structural system”PhD Thesis, Manipal Academy of Higher Education, India.
2. Zheng Luo, Jianyang Xue, Liangjie Qi, Yan Sui (2021), “Experimental and numerical study on viscously-damped outriggers with amplifying devices” Journal of Building Engineering, Volume 38, pp. 2352-7102.
3. Lili Xing, Paolo Gardoni, Ying Zhou a, Mario Aguaguina (2021), “Optimal outrigger locations and damping parameters for single-outrigger systems considering earthquake and wind excitations” Journal of Engineering Structures, Volume 245, pp.141-296.
4. Cossi Prosper Dagbo Amoussou, Honggang Lei, Wael Alhaddad, Yahia Halabi (2021), “Simplified modeling and analysis method for skyscrapers with outrigger system” Journal of Structures, Volume 33, pp.1033-1050.
5. Kashif Salman, Dookie Kim, Ataullah Maher & Abdul Latif (2020), “ Optimal control on structural response using outrigger braced frame system under lateral loads” Journal of Structural Integrity and Maintenance vol.5, pp.40-50.
6. Tae‑Sung Eom, Hiubalt Murmu, Weijian (2019), “Behavior and Design of Distributed Belt Walls as Virtual Outriggers for Concrete High-Rise Buildings” Journal of Concrete Structures and Materials, Volume 152, pp.448‑701.

7. Yue Chen, Zhenya Zhang (2017), “Analysis of outrigger numbers and locations in outrigger braced structures using a multiobjective genetic algorithm” Journal of The Structural Design Tall and special Buildings, Volume 27, pp.408–424.
8. Meisam Safari Gorji, J.J. Roger Cheng (2017), “Steel plate shear walls with outriggers. Part II: Seismic design and performance” Journal of Constructional Steel Research, Volume 137, pp.311-324.
9. Hyun-Su Kim, Joo-Won Kang (2017), “Semi-active Outrigger Damping System for Seismic Protection of Building Structure” Journal of Asian Architecture and Building Engineering, Volume 208, pp.712-749.
10. Han-Soo Kim (2017), “Optimum design of outriggers in a tall building by alternating nonlinear programming” Journal of Structural Engineering, Volume 150, pp.91-97.
11. Dhanaraj M. Patil, Keshav K. Sangle (2016), “Seismic behaviour of outrigger braced systems in high rise 2-D steel buildings” Journal of Structures, Volume 16, pp.133.

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.

🔒 This is a subscription article

Full text is available to subscribers and institutional members. Please choose an option below to access it.

1. Kavyashree, Dr. Shantharama patil (2022), “Robust controller design for performance enhancement of outrigger structural system”PhD Thesis, Manipal Academy of Higher Education, India.
2. Zheng Luo, Jianyang Xue, Liangjie Qi, Yan Sui (2021), “Experimental and numerical study on viscously-damped outriggers with amplifying devices” Journal of Building Engineering, Volume 38, pp. 2352-7102.
3. Lili Xing, Paolo Gardoni, Ying Zhou a, Mario Aguaguina (2021), “Optimal outrigger locations and damping parameters for single-outrigger systems considering earthquake and wind excitations” Journal of Engineering Structures, Volume 245, pp.141-296.
4. Cossi Prosper Dagbo Amoussou, Honggang Lei, Wael Alhaddad, Yahia Halabi (2021), “Simplified modeling and analysis method for skyscrapers with outrigger system” Journal of Structures, Volume 33, pp.1033-1050.
5. Kashif Salman, Dookie Kim, Ataullah Maher & Abdul Latif (2020), “ Optimal control on structural response using outrigger braced frame system under lateral loads” Journal of Structural Integrity and Maintenance vol.5, pp.40-50.
6. Tae‑Sung Eom, Hiubalt Murmu, Weijian (2019), “Behavior and Design of Distributed Belt Walls as Virtual Outriggers for Concrete High-Rise Buildings” Journal of Concrete Structures and Materials, Volume 152, pp.448‑701.

7. Yue Chen, Zhenya Zhang (2017), “Analysis of outrigger numbers and locations in outrigger braced structures using a multiobjective genetic algorithm” Journal of The Structural Design Tall and special Buildings, Volume 27, pp.408–424.
8. Meisam Safari Gorji, J.J. Roger Cheng (2017), “Steel plate shear walls with outriggers. Part II: Seismic design and performance” Journal of Constructional Steel Research, Volume 137, pp.311-324.
9. Hyun-Su Kim, Joo-Won Kang (2017), “Semi-active Outrigger Damping System for Seismic Protection of Building Structure” Journal of Asian Architecture and Building Engineering, Volume 208, pp.712-749.
10. Han-Soo Kim (2017), “Optimum design of outriggers in a tall building by alternating nonlinear programming” Journal of Structural Engineering, Volume 150, pp.91-97.
11. Dhanaraj M. Patil, Keshav K. Sangle (2016), “Seismic behaviour of outrigger braced systems in high rise 2-D steel buildings” Journal of Structures, Volume 16, pp.133.