Evolution and Performance of Structural Systems in Skyscrapers under Lateral Loads

Abstract

The growth of population and rapid urbanization has significantly led to the development of high-rise buildings that provide more occupants over a limited plot size, which is a critical requirement today. The primary challenges faced by these structures are wind and seismic loads, which cause swaying and structural failure. This paper critically analyzes the evolution and lateral load performance of skyscraper structural systems with respect to their efficiency under various lateral loadings. Latest structural systems like outrigger and belt truss systems provide adequate lateral stiffness as well as reduce storey drift. On the other hand, tube-based systems, e.g., tube in tube or bundled tubes, resist overturning moments and lateral displacement. Diagrid Structural systems are not only efficient in resisting lateral loads but also provide opportunities for architectural treatments. Emerging structural systems lean towards Hybrid systems that mainly focus on improved lateral resistance with advanced materials such as fiber-reinforced plastics (FRP) for optimized efficiency. Vibrations are also one of the key challenges for these types of structures, for which damping systems are introduced, such as tuned mass dampers (TMD) and tuned liquid dampers (TLD) to reduce vibrations and improve occupant comfort. Recent advancements in structural systems indicate a strong shift towards performance-based structural design and analysis aimed at improving lateral resistance, material efficiency, and occupant comfort.

Introduction

Rapid urbanization and population growth have increased the demand for housing and infrastructure in cities. To efficiently accommodate large populations in limited land areas, skyscrapers have emerged as a key solution. However, as building height increases, challenges related to safety, stability, and resistance to loads—especially wind and seismic forces—become more critical. Traditional structural systems such as Moment Resisting Frames (MRFs) and simple rigid frames are insufficient for very tall buildings because they lack the required stiffness and energy dissipation capacity to control lateral movements.

Over time, structural systems for skyscrapers have evolved to better resist lateral loads and improve building performance. Early skyscrapers relied mainly on MRFs, but due to their limitations, engineers developed advanced systems such as tube systems, outrigger and belt-truss systems, and diagrid systems. These systems improve stiffness, reduce lateral displacement, and enhance overall structural efficiency. Modern design approaches now focus on performance-based design, prioritizing drift control, occupant comfort, and structural safety rather than only strength.

Wind and seismic forces are the main lateral loads affecting tall buildings. Wind loads increase with height and can cause sway, vibrations, and serviceability problems such as occupant discomfort. Seismic loads, on the other hand, generate inertial forces due to ground motion, leading to base shear, overturning moments, and potential structural damage. Therefore, skyscrapers must be designed with systems that control inter-storey drift, floor acceleration, and energy dissipation.

Different structural systems offer varying levels of performance. MRFs provide good ductility but insufficient stiffness for very tall buildings. Tube systems improve stiffness by transferring loads through perimeter columns and beams. Outrigger and belt-truss systems enhance stability by connecting the central core with exterior columns, reducing drift and overturning moments. Diagrid systems, which use diagonal members instead of vertical columns, provide high stiffness, efficient load transfer, and architectural flexibility while using less material.

Although many studies examine individual structural systems, there is still a lack of comprehensive comparisons of how these systems perform under different loading conditions. The reviewed research aims to evaluate and compare these structural systems to determine their reliability, efficiency, and sustainability under wind and seismic loads, helping engineers and architects select the most suitable systems for modern skyscrapers.

Conclusion

The rapid growth of urbanization and exceeding populations have made tall buildings an essential part of development. However, the extreme height of a building makes lateral load, seismic, and wind act more vigorously, making an efficient structural system a critical part of the design. This review has examined the evolution of structural systems in skyscrapers with a focus on their performance under lateral loading conditions. It is observed that conventional structural systems like MRFs and simple rigid frames can be used for low to medium-sized buildings, but are not adequate for skyscrapers due to their limited stiffness, low control over lateral displacements, and vibrations. These obstacles have led the engineers to develop advanced techniques as a solution to these challenges, like tube-based, Diagrid, and belt-truss systems. Tube-base systems are quite efficient in controlling overturning moments, while outrigger and belt truss systems significantly provide adequate stiffness as well as reduced storey drift by engaging core and exterior columns. The Diagrid system improves structural efficiency through the combination of gravity and lateral load resistance. The review also describes that most present studies only highlight individual structural systems without providing a detailed description of their lateral load performance. This limits the understanding of designers and engineers of a system\'s response under varying load conditions. Therefore, a consolidated assessment of different structural systems, as presented in this paper, is essential during the selection process. Future advancements in skyscraper design will also likely include advancements in performance-based design methods, hybrid structures, and smart damping technologies. Therefore, it can be concluded that the above article demonstrates an integrated understanding of the evolution of structural systems in terms of addressing lateral loads. It would be an effective reference to engineers or to those working on such projects.

References

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Copyright

Copyright © 2026 Abdullah Mir. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.