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Twenty-six helical levels decrease the cross-section of the tower incrementa… The three-dimensional analysis model consisted of the reinforced concrete walls, link beams, slabs, raft, piles, and the spire structural steel system. The spire of Burj Khalifa is composed of more than 4,000 tons of structural steel. It consists of series high-strength reinforced concrete walls: a strong central core is connected to three building wings. 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 “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 828 metres (2,717ft) tall, the tower has 160 floors comprising hotels, restaurants, luxury residences, offices, and the world’s highest swimming pool and outside observation deck. The structural integrity of the building itself is the damping system. Dr. Max Irvine (with Structural Mechanics & Dynamics Consulting Engineers located in Sydney Australia) developed site specific seismic reports for the project including a seismic hazard analysis. Its 160 floors have a number of uses including residential units, office spaces and hotel rooms. SOM created a simple Y-shaped plan to reduce wind forces, as well as to foster constructability. The tower does not contain any structural transfers. Burj Khalifa (Arabic: برج خليفة ‎, "Khalifa Tower") is an extremely tall skyscraper in Dubai, United Arab Emirates named after Khalifa bin Zayed Al Nahyan, and is the tallest building ever built, at 828 metres (2,717 feet).Before the building opened, it was called Burj Dubai.The building is 162 stories high. The spire of Burj Khalifa is composed of more than 4,000 tons of structural steel. This settlement would be a gradual curvature of the top of grade over the entire large site. Seismic loading typically did not govern the design of the reinforced concrete Tower structure. The spire was constructed from inside the building and jacked to its full height of over 200 metres (700 feet) using a hydraulic pump. Accordingly, the primary consideration in designing the piles and raft foundation was durability. It was determined the maximum long-term settlement over time would be about a maximum of 80mm (3.1"). heights periodically. Each raft pour occurred over at least a 24 hour period. This allows the construction to proceed without the normal difficulties associated with column transfers. The center hexagonal reinforced concrete core walls provide the torsional resistance of the structure similar to a closed tube or axle. Since the shrinkage in concrete occurs more quickly in thinner walls or columns, the perimeter column thickness of 600mm (24") matched the typical corridor wall thickness (similar volume to surface ratios) (Figure 5) to ensure the columns and walls will generally shorten at the same rate due to concrete shrinkage. Other names the building has commonly been known as, including former names, common informal names, local names, etc. The solid reinforced concrete raft is 3.7 meters (12 ft) thick and was poured utilizing C50 (cube strength) self consolidating concrete (SCC). Phase 2: 3 Boreholes drilled with cross-hole geophysics. Khan's contributions to the design of tall buildings have had a profound impact on architecture and engineering. The spire was constructed from inside the building and jacked to its full height of over 200 metres (700 feet) using a hydraulic pump. The setbacks are organized in conjunction with the tower’s grid: the stepping is achieved by aligning columns above with walls below to provide a smooth load path. 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. Burj Khalifa. The second mode is a perpendicular lateral side sway with a period of 10.2 seconds. Built of reinforced concrete and clad in glass, the tower is composed of three elements arranged around a central buttressed core. These include a “sky-sourced” ventilation system, in which cool, less humid air is drawn in through the top of the building. Its reinforced concrete structure makes it stronger than steel-frame skyscrapers. This design helps to reduce the wind forces on the tower, as well as to keep the structure simple and foster constructability. The seismic analysis consisted of a site specific response spectra analysis. Torsion is the fifth mode with a period of 4.3 seconds. Burj Khalifa has got a hexagonal concrete core with an innovative system of Y-shaped buttresses which has been incorporated to give this building a stable and unique “tripod like” stance. 3.1 Lateral Load Resisting System. Its reinforced concrete structure makes it stronger than steel-frame skyscrapers. Burj Khalifa in Dubai. Structural System. The result is a tower that is extremely stiff laterally and torsionally. Excavation work began for Burj Khalifa the tallest skyscraper in the world in January 2004 and over the years, the building passed many important milestones to become the tallest man-made structure the world has ever seen. The tower does not contain any structural transfers. 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