121 Administration building Floralis Administration building realized by IPES n.v. Client: Liberty Invest n.v. Architects: Ivan Van Mossevelde; D & C Van Impe Technical data Dimensions: ± 108m x 55m Surface: 15,000 m² Storeys: 6 + 2 (underground parking) Roofing system: built-up roof Wall system: steel / glass façade Project description This impressive 6-storey steel building, achieved in August 2005, is situated on the city limits of Ghent, one of Europe’s most famous port cities. IPES’ new headquarters were conceived to reflect an image of a contemporary port, symbolising the history and trades that made Ghent famous. Flexible solutions, solid structural design combined with esthetics, competitive pricing: ASTRON has adapted its systems well to the new market requirements and has in the past collected the necessary know-how to successfully manage all large scale projects. For the Floralis project, the main advantages were the price and the reliable short delivery terms, as well as the simple erection with steel beams incorporated in the intermediate floors. This latter feature provided excellent free heights between the floors as well as reducing the structural area that had to be painted for fire protection. Installation of services proved to be much easier as with traditional solutions. Floors are set back from one another which, combined with the intensive use of glass and aluminum, plus the rotunda with its granite cladding, serve to give the Floralis building a modern and contemporary look. Completed only 15 months after work started, it will accommodate such renowned companies as Esko graphics, BMT and the administration centre of the Ghent-based Floralies. Two levels of underground parking were incorporated into the design. Description how software was used Input After job clarification, our customer needs very quickly (a matter of days) the anchor bolt reactions and lay-out. Therefore we need a tool with a quick and easy input. Among other advantages, the input of the structure and the loads is quite easy and time saving due to the fact that even wind loads don’t need to be calculated separately for each column and beam, but can be generated automatically. Once the model is defined and completely introduced, the input data can be very easily checked and a quick structural analysis according first order theory is executed. Due to the multitude of countries to which we are selling buildings, it is very important not only to have one standard (Eurocode) but a multitude of codes. For countries not included in ESA-Prima Win standards, the adaptation of safety factors and load combination factors makes it possible to work with only one single design tool. The model The entire steel structure is modelled as a 3D model in ESAPrima Win. The static design and the verification of the standard hot rolled sections for columns, roof beams and floor beams are detailed and processed in the model. The concrete staircases and the concrete walls of the ground-floor are simulated as supports, generating foundation reactions. 3Dimensional rendering This tool is used to get a realistic representation of the structure allowing new customers of a quicker comprehension of the structure and helps him to see his project during the different phases and under different angles. Diaphragm simulation of the floors The floor of our standard building consists of concrete hollow core elements which are simulated by diagonals in the floor beam area. This allows a precise generation and definition of the loads in the concrete staircases, steel stabilization crosses and steel frames. Verification according 2nd order After the model and the loads have been completely introduced, we check the second order behaviour of the structure. This allows also a precise analysis of the horizontal and vertical deformations. Dynamic seismic analysis For projects located in areas with seismic solicitation, the model is submitted to nodal analysis by ESA-Prima Win. Steel code check The main part of the different steel elements was checked and optimized with ESA-Prima Win. This allows to order material in a very early stage of the project and to reduce delivery time. In addition, a precise weight, cost and project follow up is given. Only the floor integrated beams (INODEK) consisting of a hot rolled T-cut section with a welded wider lower flange are designed separately.
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