ENGR 2301 project about burj khalifa (dubai)

1

The Burj Khalifa: A Triumph of Engineering & Architecture

Pranil Dabadi

University of North Texas

ENGR 2301

Charles “Charli” Rust

Spring 2023

Dallas College

2

Introduction

The Burj Khalifa: A Triumph of Engineering and Architecture

The Burj Khalifa is an iconic structure that stands tall in the heart of Dubai, United Arab

Emirates. It is a modern architectural marvel that attracts millions of visitors from all around the

world each year. It is the tallest structure in the world, with a height of 828 meters (2,716 feet)

and 163 floors (Baker et al., 2010). The tower is an iconic symbol of Dubai and a testament to

the ingenuity and skill of the engineers and architects who designed and constructed it.

Completed in 2010, the Burj Khalifa stands at a height of 828 meters (2,716 feet) and has 163

floors (Kijewski-Correa & Bartolini, 2018). Essentially, since controlling the dynamic wind

effects remained a primary goal from the start of the project's design, aerodynamic shaping and

wind engineering were heavily integrated into the architectural massing and design of this

flexible structure. Overall, the main purpose of this research paper is to explore the structural

systems of the tower, specifically highlighting the tower’s design and construction that are

incorporated from the early design concept.

The Concept for the Burj Khalifa

The idea for the Burj Khalifa was first conceived in 2003 when the Dubai government

wanted to create an iconic structure that would put Dubai on the global map. The building was

designed to be a centerpiece of Dubai's rapidly expanding skyline and a symbol of the city's

economic prosperity (Baker et al., 2010). The project was spearheaded by Sheikh Mohammed

bin Rashid Al Maktoum, the ruler of Dubai. The initial design for the tower was created by the

Chicago-based architecture firm Skidmore, Owings & Merrill (SOM) in collaboration with the

Dubai-based engineering firm Hyder Consulting (Goldsworthy, 2018). The concept for the tower

(this information was already stated)

Since

(delete)

3

was to create a structure that would be an architectural wonder, an engineering marvel, and a

symbol of the city’s vision for the future.

The Design of Burj Khalifa

The design of the Burj Khalifa was a complex and challenging process. The tower had to

withstand the harsh desert environment, extreme winds, and earthquakes. The Tower’s structural

system has been referred as a “buttressed core” system. The buttressed core is a structural design

innovation that evolved from Tower Palace III in Seoul (Baker & Pawlikowski, 2015). Using

standard materials and methods, the device dramatically increases height. Three building wings

are supported by a sturdy hexagonal core. Each wing is supported by the other two, making it

secure (Fig. 1). The "Y"-shaped structural concrete Burj Khalifa was designed to lessen wind

forces and simplify construction. A hexagonal hub connects each wing's high-performance

concrete hallway walls and perimeter columns (Baker & Pawlikowski, 2015). The tower's geometry

was rigorously matched by SOM, with each floor spiraling up the structure. The Tower's grid

aligns beams above with walls underneath to offer a smooth load path for building stepping. This

avoids column transfer issues during building.

Fig. 1: Typical floor plan (Baker & Pawlikowski, 2015)

tower's

to

^ (inconsistent font)

with which

^ ^

was intended

(inconsistent font)

tower's

construction.

(inconsistent font)

4

Burj's Structural Analysis and Design

Torsional resistance is provided by the hexagonal reinforced concrete core walls. The

wing and hammerhead walls counteract wind gusts and moments on the central hexagonal walls

by functioning as beam webs and flanges. Outriggers at the mechanical levels make it so the

columns can resist lateral loads in addition to gravity. Abdelrazaq (2010) states that concrete for

the walls had cube values between C80 and C60, and was made with Portland cement and fly

ash. The concrete for Dubai's tallest structure was made with materials from the area. The

Young's Elastic Modulus of the C80 concrete used in the substructure was 43,800 N/mm2

(6,350ksi) after 90 days (Baker & Pawlikowski, 2015). Wall and beam diameters can be virtually

optimized. The structural concrete in the structure met or exceeded the standards set forth in ACI

318-02. The effects of creep and shrinkage on structural components were mitigated by adjusting

wall widths and column sizes (Abdelrazaq, 2010). To lessen the effects of creep-induced

differential column shortening, the diameters of the perimeter columns were matched to the self-

weight gravity tension of the interior corridor walls. All vertical load-bearing components are

tied together by five pairs of outriggers, minimizing differential creep movements. To guarantee

that the perimeter columns and walls shrink at the same rate due to concrete shrinkage, they were

both made 600mm (24") thick due to their similar surface ratios (Baker & Pawlikowski, 2015). The

spire of the Tower is made of structural steel and is supported vertically. The tower was

constructed with gravity, wind, seismic, and fatigue resistance in mind according to the AISC

Load and Resistance Factor build Specification for Structural Steel Buildings.

The Construction of Burj Khalifa

The Burj Khalifa's 1,325-day construction period ended with a glittering opening

celebration in 2010. The building process was an engineering marvel that made use of cutting-

(inconsistent font)

elastic modulus N/mm2

(inconsistent font) were

(inconsistent font)

(inconsistent font)

tower

of the Burj Khalifa

^

5

edge methods and supplies. More than 110,000 tons, or 45,000m³, of concrete was used for the

substructure, which consisted of 192 piles driven to depths of more than 50 meters (Abdelrazaq,

2010). The foundations were poured with high-density, low-permeability concrete, and a cathodic

protection device was installed below the matting. This is an attempt to mitigate the damage

caused by the extremely acidic groundwater (Abdelrazaq, 2010). In 2004, bores were deeply dug

to sink the 192 deep piles.. The soil at the Burj site was simple to dig into; it was soft without

being unstable. The tower's special concrete mix, created by BASF, was pumped to a height of

over 600 meters without separating during building (Baker & Pawlikowski, 2015). The additive

Glenium Sky 504 from BASF prolonged the workability of the concrete to more than three

hours. Because of this, construction time was reduced, and the building's usable life was

extended, making the project more environmentally friendly.

Fig. 2: Sequence of Construction (Abdelrazaq, 2010)

Conclusion

The Burj Khalifa is a remarkable achievement in engineering and architecture. The

concept, design, and construction of the tower involved a tremendous amount of innovation,

creativity, and expertise. The tower is a testament to human ingenuity and the limitless

(inconsistent font)

(inconsistent font)

(delete extra period)

^

(inconsistent font)

construction (inconsistent font)

6

possibilities of technology. Overall, the Burj Khalifa is not only a world-renowned landmark but

also a symbol of Dubai's vision and ambition for the future.

7

References

Abdelrazaq, A. (2010). Design and Construction Planning of the Burj Khalifa, Dubai, UAE.

Structures Congress 2010. https://doi.org/10.1061/41130(369)270

Baker, B., & Pawlikowski, J. J. (2015). The Design and Construction of the World’s Tallest

Building: The Burj Khalifa, Dubai. Structural Engineering International, 25(4), 389–394.

https://doi.org/10.2749/101686615x14355644770857

Baker, W. F., Pawlikowski, J. J., & Young, B. S. (2010). The Burj Khalifa triumphs: reaching

toward the heavens. Civil Engineering Magazine Archive, 80(3), 48-55.

Ghorbanzadeh, M. (2017). The harmony between architectural forms and structural Case Study:

Burj Khalifa Dubai. Bulletin de la Société Royale des Sciences de Liège.

Goldsworthy, K. (2018). Burj Khalifa. Weigl Publishers.

Kijewski-Correa, T., & Bartolini, A. (2018). Flexible architectures for full-scale performance

evaluation of tall buildings: Burj Khalifa and beyond. In Experimental Vibration Analysis

for Civil Structures: Testing, Sensing, Monitoring, and Control 7 (pp. 17-37). Springer

International Publishing.