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International Research Journal of Engineering and Technology (IRJET)

e-ISSN: 2395-0056

Volume: 12 Issue: 10 | Oct 2025

p-ISSN: 2395-0072

www.irjet.net

Integration of Exoskeletal Structure in Mid Rise Structure Manish Kumar Yadav1, Nirendra Dev2 1M. Tech. Scholar, Department of Civil Engineering, Delhi Technological University, New Delhi 2Professor, Department of Civil Engineering, Delhi Technological University, New Delhi

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Abstract - A structural designer's top concerns while

exoskeleton, which is usually made of steel or reinforced concrete, relieving the internal structure of this duty. Numerous strong benefits are made possible by this division of structure and space. Exoskeleton systems have received a great deal of attention as a means of addressing the drawbacks of alternative solutions. Their successful and noninvasive biomimicry-based technique significantly reduces the structure's seismic loads by making the building more rigid and resistant to lateral pressures. First of all, exoskeletons provide improved structural performance, which is especially important in areas that are prone to earthquakes or strong winds [2]. The building's resilience and safety can be increased by designing the external frame to more successfully withstand lateral forces. Second, and perhaps more importantly from an architectural perspective, the exoskeleton makes it possible to create interior areas that are open and free of columns. Over the course of the building's life, this layout flexibility permits easier adaptation to changing needs and gives designers more creative freedom. Open-plan offices and adaptable retail spaces are only two of the many uses made possible by large, continuous floor plates [3].

designing and maintaining structures are stiffness and drift since a decrease in stiffness and an increase in drift can result in the breakdown of the entire structure, which can have negative effects on safety and the economy. ETABS, a tool commonly used to analyse structures under various loading conditions, is utilized in this study to examine the stability of an existing structure. The main goal of the study is to compare the mid-rise structure and exoskeletal system under lateral loading. The exoskeletal system upgrade improved the structure's lateral displacement, drift, and stiffness under seismic and wind loads, according to the analysis that was obtained. In order to improve the overall stability and performance of mid-rise structures under lateral loading circumstances, the study highlights the significance of the exoskeleton, offering important insight. The maximum lateral displacement for a structure without an exoskeleton is larger than that of a structure without one, according to analysis conducted under seismic and wind loads. This shows that exoskeletons reduce lateral displacement. The goal of the study is to determine which bracing orientation in steel exoskeletal constructions results in the greatest reduction in lateral displacement under lateral loading circumstances, as well as which bracing orientations cause the most lateral displacement loss. The efficacy of exoskeletal as a retrofitting technique is highlighted in the study. They act as a fixed supporting system for the structure, reducing the displacement under study in response spectrum analysis and increasing overall stiffness.

Exoskeletons provide advantages in terms of structure and space, but they also present intriguing opportunities for architectural expression. A key design element that adds to the building's aesthetic identity and establishes a unique visual presence is the external framework. Additionally, including sustainable design components is made possible by exoskeleton. It can accommodate rainwater collection systems, vertical green walls, sun shading devices, and other elements that improve environmental performance and energy efficiency. Although the idea of using exoskeletal structures in mid-rise building has its own set of prospects and challenges, it balances cost-effectiveness with the possibility of major functional and architectural advancements. The goal of creating more resilient, flexible, and sustainable built environments is what motivates this investigation into incorporating exoskeletons into mid-rise structures [4]. We must use dynamic analysis to examine the structure's dynamic behavior. For mid-rise buildings, dynamic analysis will assist in determining how each story will react to lateral loading events. To study the seismic effect, there are two different types of seismic dynamic analysis (a) Response spectrum analysis (b) Time history analysis. In this paper study done by considering Response spectrum analysis.

Key Words: Exoskeletal, Drift, Response Spectrum, bracings, Displacement, Seismic Load.

1. INTRODUCTION An important development in structural engineering and architecture is the incorporation of exoskeletal structures into mid-rise buildings, which offers an alternative to traditional building practices. The exoskeleton, a supplementary, external structural framework, is created to enclose and support the main building structure in this novel method [1]. The main load-bearing system is this

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