When the construction was at Level 135, the average foundation settlement was 30mm (1.2"). Wind Engineering Design The spiraling “Y” shaped plan was used to reinforce the structural core of Burj Khalifa. Overcoming this problem was a challenge and a great inovation to the world of structural … Each wing, with its own high-performance concrete core and perimeter columns, buttresses the others via a six-sided central core, or hexagonal hub. The Burj Khalifa’s lateral system is a buttressed core that is 606 meters in height. Each wing is also braced by a series of buttress walls which are connected by coupling beams and radiated from a central closed prismatic tube. Torsion is the fifth mode with a period of 4.3 seconds. Outriggers at the mechanical floors allow the columns to participate in the lateral load resistance of the structure; hence, all of the vertical concrete is utilized to support both gravity and lateral loads. Structural System In addition to its aesthetic and functional advantages, the spiralling “Y” shaped plan was utilized to shape the structural core of Burj Khalifa. At 828 meters in height, the Burj Khalifa is the tallest building in the world. Due to the aggressive conditions present caused by the extremely corrosive ground water, a rigorous program of anti-corrosion measures was required to ensure the durability of the foundations. The Tower foundations consist of a pile supported raft. The setbacks are organized with the Tower's grid, such that the building stepping is accomplished by aligning columns above with walls below to provide a smooth load path. General The Burj Khalifa project is a multi-use development tower with a total floor area of 460,000 square meters that includes residential, hotel, commercial, office, entertain-ment, shopping, leisure, and parking facilities. Other names the building has commonly been known as, including former names, common informal names, local names, etc. SOM applied a rigorous geometry to the tower that aligned all the common central core, wall, and column elements. After getting information directly of the website about the construction of Burj Khalifa, we were able to understand more about the structural system within the building. The central core has a higher resistance towards the torsional resistance. SOM created a simple Y-shaped plan to reduce wind forces, as well as to foster constructability. By combining cutting-edge technologies and cultural influences, the building serves as a global icon that is both a model for future urban centers and speaks to the global movement towards compact, livable urban areas. The spire of Burj Khalifa is composed of more than 4,000 tonnes (4,400 short tons; 3,900 long tons) of structural steel. Each tier of the building sets back in a spiral stepping pattern up the building. The decision to build Burj Khalifa was based on the government’s decision to diversify from an oil-based La Grange multiplier methodology which results in a very efficient structure (Baker et ah, 2000).The reinforced concrete structure was designed in accordance with the requirements of ACI 318-02 Building Code Requirements for Structural Concrete. The Khalifa's Tower and Podium structures are currently under construction (Figure 3) and the project is scheduled for topping out in 2008. The 280,000-square-meter skyscraper contains office, residential, and retail space, along with a Giorgio Armani hotel. As with all super-tall projects, difficult structural engineering problems needed to be addressed and resolved. The advantage of the tower's stepping and shaping is, in essence, to “confuse the wind.” Wind vortexes can never sufficiently coalesce because the wind encounters a different building shape at each tier. of the tower structural systems, focuses on the key issues considered in construction planning of the key structural components and briefly outlines the execution of one of the most comprehensive architectural forms and structural in tall buildings. Its reinforced concrete structure makes it stronger than steel-frame skyscrapers. The structural integrity of the building itself is the damping system. Local aggregates were utilized for the concrete mix design. This settlement would be a gradual curvature of the top of grade over the entire large site. To be precise, burj khalifa has no damping system like a tuned mass damper or so. These include a “sky-sourced” ventilation system, in which cool, less humid air is drawn in through the top of the building. Structural System In addition to its aesthetic and functional advantages, the spiraling “Y” shaped plan was utilized to shape the structural core of Burj Khalifa. The “Y” shaped plan also provided a stable platform on which to base the development of a new “buttressed core” structural system specially developed to support a building of this height while maintaining the tower’s slender and elegant shape. At the pinnacle, the central core emerges and is sculpted to form a spire. An image of the Burj Khalifa is shown in Figure 1. Burj Khalifa's construction will have used 330,000 m3 (431,600 cu yd) of concrete and 39,000 tonnes (43,000 ST; 38,000 LT) of steel rebar, and construction will have taken 22 million man-hours. 2 STRUCTURAL SYSTEM BRIEF DESCRIPTION 2.1 General The Burj Khalifa project is a multi-use development tower with a total floor area of 460,000 square meters that includes residential, hotel, commercial, office, entertainment, shopping, leisure, and parking facilities. Phase I; 23 Boreholes (three with pressuremeter testing) with depths up to 90m. The crowning glory of Burj Khalifa is its telescopic spire comprised of more than 4000 tons of structural steel. The dynamic analysis indicated the first mode is lateral side sway with a period of 11.3 seconds (Figure 7). As it rises from a flat base, setbacks occur at each element in an upward spiraling pattern, reducing the tower’s mass as it reaches skyward. Burj Khalifa. The 280,000 m2 (3,000,000 ft2) reinforced concrete multi-use Burj Dubai tower is utilized for retail, a Giorgio Armani Hotel, residential and office. Each wing, with its own high performance concrete corridor walls and perimeter columns, buttresses the others via a six-sided central core, or hexagonal hub. Twenty-six helical levels decrease the cross-section of the tower incrementa… The Burj Khalifa tower is crowned with a 4,000 tonnes structural steel telescopic spire, which houses communications equipment. Beyond its record-breaking height, the Burj Khalifa incorporates new structural and construction efficiencies to reduce material usage and waste. stringent crack control design criteria, and cathodic protection system utilizing titanium mesh (Figure 13) with an impressed current. Structural System The Spiraling Y shaped was utilized shape the structural core of the Burj Khalifa. The potential for liquefaction was investigated based on several accepted methods; it was determined that liquefaction is not considered to have any structural implications for the deep seated Tower foundations. The height of the multi-use skyscraper has "comfortably" exceed the previous record holder, the 509 meter (1671 ft) tall Taipei 101. When the rebar cage was placed in the piles, special attention was paid to orient the rebar cage such that the raft bottom rebar could be threaded through the numerous pile rebar cages without interruption, which greatly simplified the raft construction. 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