32 Used software: ESA-Prima Win Project Description The project is located behind the Doha Corniche and consists of a 52 storey office tower and a three level basement car park. The tower is a 202 m tall circular building with a total office area of 83,148 m2 and a helipad at level 52. Challenges The building had to be designed and constructed in a period of 30 months between July 2006 and December 2008. The challenge faced by the designers was to produce a state of the art design in a very tide schedule. The design was made that much more complicated by the fact that the perimeter and radial steel beams were subjected to significant tensile loads resulting from the shape of the building. The floor slabs were designed to act as membranes bracing the diagrid to the central core by tensile action. Connection design both between steel-to-steel and steel-to-concrete were the subject of very careful and systematic analysis of the structural models. This resulted in a very refined and detailed 3D modelling with the primary purpose of ensuring that the final layout and geometry of the connections safeguarded the overall stability of the building without impacting on the aesthetic and visual effects projected by the architects. Tower Geometry and structural system The tower consists of a 23.8 m diameter central concrete core and a perimeter steel diagrid. The design was based on BS Standards. The building is cylindrical with variable radius (maximum 28.8 m at ground floor; minimum 19.3 m at level 28. The structural system consists of the following: • Central Core – 300 mm thick RC walls of constant thickness. Floor-to-floor height is 3.8 m. The Tornado, Doha The QIPCO Office Tower, also known as the Tornado is since December 2008 one of the major and striking landmarks that define the ever-expanding Doha. Situated in the heart of the City behind the Corniche, it has transformed, once and for all, the skyline through its unique shape and character. The client for this project is QIPCO Holding with Six Construct-Midmac JV appointed as General Contractor. The Tower has a height of 202 m and consists of 3 basements and 51 floors with a total office area of 83,148 m2. It comes with its own private helicopter platform at the very top on level 52. The building has a cylindrical shape with a variable radius which thins out at mid height (28.8 m / 19.3 m / 27.8 m). Its main feature is the outer diagrid arrangement of diagonal columns and beams which give the building a unique diamond shape pattern of the cladding. Owner: Qipco Holding Architect: Cico / Siat General Contractor: Six Construct / Midmac Engineering Office: Meinhardt Singapore Construction Start: 20/07/2006 Construction End: 26/12/2008 Location: Doha, Qatar Project Information Short Description CAE Housing & Buildings 2 BESIX Contact Mike Paschalis Address Al Quoz - Street 11a PO BOX 13055 DUBAI, United Arab Emirates Phone +971-4-5092500 Email [email protected] Website www.besix.com BESIX Group is the largest Belgian construction group, a conglomerate of companies active in the construction, engineering, environmental, real estate and concession sectors. In 1909, Jacques-Marie and Charles Stulemeijer see potential in prestigious construction projects in Belgium and set up the Société Belge des Bétons (SBB). They immediately earn their reward with the rebuilding of Belgian ports and canals, in the aftermath of the war and soon the activities expand in France and Spain. In 1947 SBB recognizes the extraordinary market potential in former Belgian Congo and, together with the Belgian Group Empain, creates a common subsidiary Auxeltra-Béton. Large projects in the Middle East demand a new organization from 1966. The six companies of the SBB Group form Six Construct. The success in this new region becomes considerable. Since then, the group has known impressive and regular growth with the acquisition of new companies such as Entreprises Jacques Delens in Brussels, Etablissements Jean Wust in Wallonia and Vanhout in Flanders and, more recently, Van Britsom (Oostkamp), Verheye (Diksmuide), GRWestkust (Diksmuide) (50%), Socogetra (Awenne) and Cobelba (Naninne). In the meantime, the company has entered the Egyptian and Libyan markets, it has also becomes an important player in France and the Netherland and has realized impressive projects in India, Russia, Poland, the Czech Republic, Slovakia, Algeria, Morocco and many other countries. In 2004, thirteen managers of BESIX and its subsidiaries, together with Orascom Construction Industries, execute a management buy-out. SBB becomes BESIX Group, firmly anchored in Belgium. Today, BESIX and its subsidiaries cover practically all fields of the construction industry and are operating in Western Europe, in Central and Eastern Europe, North and Central Africa, in the Middle East, in Central Asia and in the Caribbean. The Group realized a turnover of approximately 1.6 billion Euros and employs over 20.000 people worldwide. The Group intends to be a leading international player, serving Western and Central European markets from its home country Belgium, and covering the Middle-East from the United Arab Emirates. The success of the group is the result of: • A commitment of upholding the highest standards of quality, reliability, professionalism and performance. • The permanent seek of innovative ways to increase its expertise and enhance its performance. • Providing a safe work environment • A particular care for the teamwork spirit and the respect of individuals • Taking new challenges that will strengthen the reputation and open new horizons. It is an impressive structure, well presented and with a lot of highly technical aspects. The steel and concrete connections were carefully designed. This project is a good example how interoperability with other software can be used. The seismic and dynamic analysis as well as accommodating the difference in settlements between the core and the adjacent structure was a great technical challenge. Quote of the Jury Prize of the Jury Prize of the Jury
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