A Study on the preliminary design of tall buildings: investigating structural components

Download

index.pdf

Date

2019

Author

Çamlıbel, Gülçin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

402
views

209
downloads

Tall buildings are built to respond to limited and high-cost urban land problem, and they became essential for urbanization which changes the sights of the cities. These buildings are huge investments, and keeping Net Floor Area (NFA) within acceptable limits while satisfying stiffness and strength requirements of the building is important; therefore, different structural systems are improved in order to overcome huge lateral load demands. Since simple design approaches and rule-of-thumb dimensioning methods based on conventional structures and loads cannot be adapted to tall buildings, tall buildings, particularly supertall buildings which are more than 300m in height requires a long and repetitive planning phase before structural and architectural design. The aim of this study is to provide the approximate dimensions of the structural components, particularly core and columns, of tall buildings for preliminary design phase by investigating existing buildings. For this purpose, a database of tall buildings which is obtained from existing buildings is created and corresponding statistical analysis results are presented. At the first stage of the study, a literature survey has been conducted in order to determine the structural design considerations of tall buildings. According to these considerations, identity parameters, architectural parameters and structural parameters are specified and collected for as much existing buildings as possible. Important parameters such as aspect ratio, core area and column area have been calculated, and special features such as dampers and wind openings have been detected. Structural system details of outriggered frame buildings such as outrigger height and number of outriggers have been investigated. Regarding the collected information, statistics on preliminary design variables of tall building’s structural systems have been presented. According to the analyses, core area and column area ranges of tall buildings are given for outriggered frame, tube and shear frame structural systems and for specific regions. The results showed that, shear frame system is the least efficient structural system whereas outriggered frame system is as favored as tube system in terms of net floor area. The results showed that, for preliminary design of a tall building regardless of its structural system, location, structural material or height, 27% and 3% can be taken as conservative central values of core and column area ratio, respectively. Minimum, maximum and average values of ratios of core area to floor area and total column area to floor area are provided with respect to alternative structural system of tall buildings. The results of this study can be easily used by architects and engineers in the preliminary design stage of tall buildings.

Subject Keywords

Tall buildings., Keywords: Tall Building, Tall Building Structural Systems, Net Floor Area, Statistical Analysis of Tall Buildings, Structural Components.

URI

http://etd.lib.metu.edu.tr/upload/12624482/index.pdf
https://hdl.handle.net/11511/44256

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Evaluation of natural ventilation systems in tall buildings considering altitude based environmental variations Karadağ, İlker; Zeytun Çakmaklı, Ayşem Berrin; Department of Building Science in Architecture (2014) Buildings relied on natural ventilation strategies alone for many centuries up to the post-World War II period in which cheap energy started to liberate architecture from its connection with the natural environment. Then, the economic downturn in the 1970s, fuelled by the worldwide energy crisis in 1973 drew the attention to reduction and conservation of energy, the response was the model of the sealed glass box with an acceptance of the air-conditioning system. This resulted in Sick Building Syndrome (SBS)...
A comparative study on alternative structural system layouts of twisted tall buildings Taşkın, Gökçe Nihan; Ay, Bekir Özer; Department of Building Science in Architecture (2019) Tall buildings are seen as icons in their environment and they have a strong impact on the silhouette of the cities. The form of a tall building is critical to define an iconic expression and control their impact on the city silhouette in an aesthetically desired way. In this respect, designers are searching for diversity and uniqueness in the form of tall buildings. Twisted forms are one of the answers for this quest. However, the inherent complexity of twisted tall buildings can pose adverse design featur...
Planning considerations of tall buildings : service core configuration and typologies Keskin, Zeynep; Günel, Mehmet Halis; Department of Building Science in Architecture (2012) In general, tall buildings, some of which are termed as “skyscrapers”, are among the typical and almost unavoidable features of the metropolitan cities. There is a competititive race of constructing higher and higher buildings since the birth of the infamous Home Insurance Building in Chicago which is still considered to be the pioneer of the modern tall buildings. Recently, an efficient service core design is strongly needed and inquired with the increase in height and capacity of tall buildings. Such need...
A comparative study on structural design alternatives for twisted tall buildings with outriggers Demirel, G. N.; Ay, Bekir Özer (2022-08-01) Tall buildings are seen as iconic landmarks because of their bold effect on the city silhouette. To control this bold effect in an aesthetically desired manner, designers search for intriguing forms such as twisted buildings. There are two main approaches for designing the structural system of a twisted tall building. In the first approach, the twisted form of the building is obtained only by the rotation of the floors, and the structural system is maintained in a conventional, perpendicular way. Alternativ...
The Integration of tall buildings with the urban environment: considering the key sustainability concepts Tohumcu, Tulu; Zeytun Çakmaklı, Ayşem Berrin; Baş Bütüner, Funda; Department of Building Science in Architecture (2014) As a result of physical, social and economic needs, demand for tall buildings is increasing worldwide. Due to their great size and large impacts on the urban environment, tall buildings, through careful design and urban integration, have the potential to improve the quality around them. Also, depending on their large area of influence, design considerations regarding sustainability and environmental integration of tall buildings need to be handled with more care than with other conventional buildings to pro...

Citation Formats

G. Çamlıbel, “A Study on the preliminary design of tall buildings: investigating structural components,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Building Science in Architecture., Middle East Technical University, 2019.