Interrelations of slenderness ratio and main design criteria in supertall buildings

Ilgın, Hüseyin Emre

doi:10.1108/ijbpa-07-2022-0102

Cited by 14 publications

(17 citation statements)

References 41 publications

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“…This aspect is particularly crucial for investors as it involves maximizing the useable space within floor plans to achieve the highest possible returns. The level of space efficiency is primarily influenced by factors such as the load-bearing system, the form of the building, as well as the configuration of the floor slabs (Ilgın, 2023a). Additionally, the concept of space efficiency is significant in determining the lease span, which represents the distance between fixed internal elements like service core walls and the building envelope like windows (Ilgın et al ., 2023).…”

Section: Methodsmentioning

confidence: 99%

“…Limited research exists in the literature that explores the concept of space efficiency in tall and supertall buildings. Previous studies have predominantly focused on analyzing a small number of tall buildings, with the exception of Ilgın's studies (2021a, b, 2023a).…”

Section: Literature Surveymentioning

confidence: 99%

“…Existing studies primarily focus on functional aspects [e.g. Ilgın (2021aIlgın ( , 2023a] and/or architectural design [e.g. Okbaz and Sev (2023)] of these towers.…”

Section: Literature Surveymentioning

confidence: 99%

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An analysis of space efficiency in Asian supertall towers

Ilgın

2023

IJBPA

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PurposeSupertall towers (300 m+) offer a viable solution to the increasing demand for housing and commercial space caused by rapid urban growth, migration from rural to urban areas and economic expansion in Asia. In this particular context, the efficient utilization of space becomes a crucial factor in the design process for Asian skyscrapers as they seek to address the changing socioeconomic landscape. This study will provide valuable guidance, especially to architectural and structural designers in the pursuit of sustainable development for Asian skyscrapers by analyzing space efficiency.Design/methodology/approachThe methodology employed in this paper involved a case study approach to gather data on 75 Asian supertall towers in order to examine space efficiency.FindingsFindings of the research can be summarized as follows: (1) the average space efficiency of these towers was 67.5%, ranging from a minimum of 55% to a maximum of 82%; (2) the average proportion of the core area to the gross floor area (GFA) was 29.5%, with values ranging from 14% to 38%; (3) the majority of Asian skyscrapers exhibited a tapered form and adopted a central core typology, which catered to mixed-use and office purposes; (4) the most frequently utilized structural system was a combination of composite and outriggered frames; (5) space efficiency tended to decrease as the height of the tower increased; and (6) there was no noteworthy difference in the impact of various load-bearing systems and building forms on space efficiency.Originality/valueThere is a noticeable lack of extensive research into space efficiency in supertall towers in Asia, which serves as a hub for skyscrapers. This study seeks to fill this substantial gap in the current scientific literature.

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Section: Methodsmentioning

confidence: 99%

Section: Literature Surveymentioning

confidence: 99%

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An analysis of space efficiency in Asian supertall towers

Ilgın

2023

IJBPA

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“…Ilgın [23] attempted to provide an understanding of tapered skyscrapers by using the main planning criteria for 41 supertall towers. Ilgın [24] scrutinized the interrelationships between the aspect ratio and the key planning parameters in 75 skyscrapers.…”

Section: Introductionmentioning

confidence: 99%

Freeform Supertall Buildings

Ilgın¹,

Karjalainen²

2023

cea

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To date, no research has been carried out in the literature that gives insight into the relationships between freeform and key design parameters in supertall towers (≥ 300 meters). This critical subject is investigated in this paper with data collected from 39 building cases, taking into account building function, load-bearing system, and structural material as design parameters. The key findings of the paper highlighted the following: (1) the only core typology was central core type; (2) mixed-use and office were the most favored functions; (3) the most favored system in freeform supertall tower projects was outriggered frame system; (4) composite construction was common among supertall towers and its closest follower was reinforced concrete; (5) building functions other than hotel exceeded 500 m in free form; (6) in the sample group, freeform buildings with outriggered frame and tubular systems exceeded half a kilometer as well; (7) both composite and reinforced concrete freeform towers pushed the limits of height considerably; and (8) as the number of some supertall tower buildings (such as hotel buildings) was not adequate, it did not seem possible to derive a scientific interrelation between the height of the building and the corresponding planning parameter. It is thought that revealing the current state of the free forms, which are among the most preferred skyscraper forms today, will shed light on the supertall building designs to be made in the future.

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“…They highlighted the concept of "aerodynamically adaptive architectural form" as one of the most efficient ways to realize wind-resistant design. While Ilgın [29] focused on the interrelatedness of structural systems and main planning concerns through more than 100 contemporary supertall towers, Ilgın [30] analyzed the interrelation of aspect ratio and key design parameters in modern skyscrapers.…”

Section: Introductionmentioning

confidence: 99%

Review on Supertall Building Forms

Ilgın¹

2023

cea

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To date, few studies have provided an understanding of the interrelations between forms and key design parameters in supertall towers (equal to or higher than 300 m). This vital topic was examined through data collected from 140 supertall cases, considering height, location, function, load-bearing system, and material as the main parameters. Key findings of the paper highlighted the following: (i) in 300-399 m high towers, mostly prismatic, setback, tapered, and free forms were used; (ii) tapered forms were generally preferred in Asia, while the prevalence of prismatic and free forms was noted in the Middle East; (iii) while tapered form was preferred most in mixed-use function, office towers were generally built in free form; (iv) prismatic and tapered forms were generally utilized in supertall cases with tube system, whereas tapered and free forms were utilized more in towers with outriggered frame system; (v) while reinforced concrete was commonly used in prismatic and setback towers, tapered and free tower forms were mostly built in composite. This paper is considered to be an initial guideline for key project and construction stakeholders.

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Interrelations of slenderness ratio and main design criteria in supertall buildings

Cited by 14 publications

References 41 publications

An analysis of space efficiency in Asian supertall towers

An analysis of space efficiency in Asian supertall towers

Freeform Supertall Buildings

Review on Supertall Building Forms

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