Search this site. An image of the Burj Khalifa is shown in Figure 1. Beyond its record-breaking height, the Burj Khalifa incorporates new structural and construction efficiencies to reduce material usage and waste. This design helps to reduce the wind forces on the The C80 concrete for the lower portion of the structure had a specified Young's Elastic Modulus of 43,800 N/mm2 (6,350ksi) at 90 days. concrete and blended with structural steel. The final height of the building is 2,717 feet (828 meters). The structure of Burj Khalifa was designed to behave like a giant column with cross sectional shape that is a reflection of the building massing and profile. Market: Commercial + Office, Hospitality, Mixed Use, Residential, National Geographic Features Burj Khalifa and William Baker in Engineering Marvels Series, The Man Behind the Wonders – Bill Baker Reveals the Secrets of Structural Engineering, William F. Baker in The Engineers on BBC World Service, Structural Engineers Association of Illinois, American Society of Civil Engineers (ASCE) – Architectural Engineering Institute (AEI), Award of Merit: World Voices Sculpture, Burj Khalifa Lobby, GCC Technical Building Project of the Year, International Association for Bridge and Structural Engineering, Excellence in Structural Engineering: Most Innovative Structure, International Projects Category: Outstanding Project, National Council of Structural Engineers Association, Special Recognition for Technological Advancement, 875 North Michigan Avenue – Structural Engineering, Willis Tower (formerly Sears Tower) – Structural Engineering, Poly Real Estate Headquarters – Structural Engineering, Poly Corporation Headquarters – Structural Engineering. Torsion is the fifth mode with a period of 4.3 seconds. The massing of the 828-meter (2,717-foot) tall Burj Khalifa is organized around a central core with three wings, each consisting of four bays (see Figure 2). Burj Khalifa has "refuge floors" at 25 to 30 story intervals that are more fire resistant and have separate air supplies in case of emergency. It consists of series high-strength reinforced concrete walls: a strong central core is connected to three building wings. The wall and column sizes were optimized using virtual work .' Phase 4: 1 Borehole with cross-hole and down-hole gophysics; depth = 140m. Burj Khalifa is equivalent to 17 football (soccer) fields or 25 American football fields. The concrete mix for the piles was a 60 MPa mix based on a triple blend with 25% fly ash, 7% silica fume, and a water to cement ratio of 0.32. Strainstall have completed a six year monitoring contract on the Burj Khalifa Tower in Dubai - the tallest man-made structure ever built. Burj Khalifa uses the bundled tube design of the Willis Tower, invented by Fazlur Rahman Khan. The structural system employed for Burj Khalifa can be called as the Buttressed Core System. SOM applied a rigorous geometry to the tower that aligned all of the common central core and column elements. An image of the Burj Khalifa is shown in Figure 1. Structural System Material The tower superstructure of Burj Khalifa is designed as an all reinforced concrete building with high performance concrete from the foundation level to level 156, and is topped with a structural steel braced frame from level 156 to the highest point of the tower. 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. The Burj Khalifa is designed to be the centerpiece of the large The spire was constructed from inside the building and jacked to its full height of over 200 metres using a hydraulic pump. structural system of the Burj Khalifa acts like a single unit creating a tower that acts as one giant concrete beam cantilevering from the ground. The tower is composed of three elements arranged around a central core. Accordingly, the primary consideration in designing the piles and raft foundation was durability. Burj Khalifa in Dubai. Architecture. 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. 3.22 shows a typical floor plan of the tower, a buttress core system was used as the major structural system for this supertall tower. 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