The total weight of aluminium used on Burj Khalifa is equivalent to that of five A aircrafts and the total length of stainless steel bull nose fins is times the height of Eiffel Tower in Paris.
In November , the highest reinforced concrete core walls were pumped using 80 MPa concrete from ground level. A vertical height of metres. The concrete pressure during pumping to this level was nearly bars. The amount of rebar used for the tower is 31, metric tons - laid end to end this would extend over a quarter of the way around the world. Chat with us between 8. Need help? How can we help you? Close Start Chat. Learn more about our commitment to cleanliness and safety measures.
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The building was built within a period of 6 years. The construction began on 6 January and ended in the year Adrian Smith is the man for the structural and architectural design of Burj Khalifa. The tower is composed of three elements arranged around a central core at the base, twenty-six helical levels and it is gradually decreasing towards the top. The tip of the sphere of Burj khalifa can be viewed from 95 km away.
Due to the integration of aerodynamic shaping and the plan, the structure can reduce the effect of wind forces. The central core has a higher resistance to torsion. The total floor area of the building is sq meters. The whole structure is designed as a reinforced concrete building with High-Performance Concrete up to level and up to the top it is designed as a structural steel braced frame. The C80 and C60 cube strength concrete is used with fly ash, portland cement, and the local aggregates.
The largest pumps in the world were used to pump concrete up to a height of m at a single step. The superstructure is built over a large Raft Foundation system. The raft is again supported by concrete piles. The Raft has a thickness of 3. The bottom and all the sides are protected by a waterproofing membrane. The concrete volume used in the raft is a meter cube. The number of piles was The piles were 1.
The exterior exposed steel is protected with a flame applied aluminum finish. The three-dimensional analysis model consisted of the reinforced concrete walls, link beams, slabs, raft, piles, and the spire structural steel system. The full 3D analysis model consisted of over 73, shells and 75, nodes. Under lateral wind loading, the building deflections are well below commonly used criteria. The dynamic analysis indicated the first mode is lateral side sway with a period of The second mode is a perpendicular lateral side sway with a period of Torsion is the fifth mode with a period of 4.
The seismic analysis consisted of a site specific response spectra analysis. Seismic loading typically did not govern the design of the reinforced concrete Tower structure. Seismic loading did govern the design of the reinforced concrete Podium buildings and the Tower structural steel spire. 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.
In addition to the standard cube tests, the raft concrete was field tested prior to placement by flow table Figure L-box, V-Box and temperature.
The Tower foundations consist of a pile supported raft. The solid reinforced concrete raft is 3. The raft was constructed in four 4 separate pours three wings and the center core. Each raft pour occurred over at least a 24 hour period. Reinforcement was typically at mm spacing in the raft, and arranged such that every 10lh bar in each direction was omitted, resulting in a series of "pour enhancement strips" throughout the raft at which mm x mm openings at regular intervals facilitated access and concrete placement.
The Burj Tower raft is supported by bored cast-in-place piles. The piles are 1. The Tower pile load test supported over 6, tonnes Figure The C60 cube strength SCC concrete was placed by the tremie method utilizing polymer slurry.
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