Airplane Maintenance Workshop CSM nv Hamonterweg 103 3930 Hamont-Achel Belgium Tel.: +32 11 64 07 51 Fax: +32 11 64 87 95 Email: [email protected] Contact: M. Ronny Loos Email: [email protected] In 1965, C. Schuurmans started with a small construction workshop in Achel, Belgium, near the Dutch border. 40 years later, the company has become one of the most important steel manufacturers in Belgium with establishments in Achel and Hamont. CSM has its own engineering, production, and assembly department which enables us to finish different types of projects entirely in own management. The workshops have a total surface of approximately 25,000 m², with a hoist capacity up to 100 ton. CSM realizes a yearly turnover of approximately 20 Million Euros. Thanks to its 150 employees, CSM processes 10.000 tons of steel on a yearly basis. Besides the Benelux, CSM is also active in Germany, France and The United Kingdom. The product range of CSM is very diverse. Not only architectonic constructions of rolled tubes with smooth welding and steel connections are possible, also larger industrial projects, such as boiler rooms and piperacks or canals and ducts, are being manufactured to the great satisfaction of the customers. CSM also has several references in bridgeconstruction and offshore projects. CSM is certified by ISO9001, VCA**, and its welders are being inspected by means of different standards. By constantly pursuing quality, by permanently trying to realise postulated deadlines, and by putting security as primary objective, CSM strives for and is entitled to the title of trustworthy supplier. This project is part of the extension of the airport activities at Toulouse (Fr). It concerns a maintenance workshop for different types of airplanes. In order to be capable of storing large aircrafts, huge column-free dimensions were required for this project. This hall consists of 2 main spans of 95 metres and a depth of 59 metres. At the front site huge wheeled door panels are provided to achieve the best possible accessibility for the airplanes. In order to improve the working conditions at the ground floor, sufficient sunlight has to enter the hall and for this reason the roof is provided with large “shed-roofs”. Furthermore, to improve the architectonical elegancy, the roofs have been curved. As this project will be a maintenance workshop, a considerable number of cranes is integrated in the roof structure as well as other technical equipment. The structure was built as follows • Curved purlins supported by roof trusses • Roof trusses are supported by primary trusses • The primary trusses are supported on columns at the back site and at the front site a huge spaced truss is provided. The bottom chord of these trusses are also equipped with crane way girders. • The huge spaced truss (depth 8 m / width 8 m) spans 2 x 95 m and is build up of circular hollow sections. These trusses have been assembled and welded at ground level and afterwards lifted and erected as one big unit with a length of 95 m. • A stable structure is created after adding bracings at the roof and the walls. Given the complex interaction between the different building components and on explicit request of the client, the "complete" structure has been modelled in a "3Dframe”-model. The final model has up to 3910 nodes and 8690 bars. During erection, each major truss of 95 m is simply supported on 2 columns. Later on, the top chords of these trusses are welded on site as to create a continues truss of 190 m. This simply supported situation has been modelled using the option “absence” for this particular load case. On customers’ demand, a “differential” settlement of the column bases was taken into account. The wind loads have been determined taking into account the different positions of the wheeled door panels. All load cases were combined according to the combination rules described in CM66 (French standard), which resulted in approximately 60.000 load combinations. Verifying and optimising all bars for all 60.000 combinations is a very time-consuming job. This problem was resolved by storing only “the envelope internal forces”. This action resulted in a “workable” amount of results, which empowered us to recalculate and optimise the project within a reasonable time period. While creating calculation notes we encountered another problem. For this project it is quite easy to create a vast amount of paper output with input data and results. Although this would have been the easiest for us to do, we decided to hand over a demo-version of ESA-Prima Win to the controlling parties as well as a project file which included the calculated results. By consequence, the input data and the results were much more synoptic to them. Project characteristics • 2100 ton • 26000 m² • Chantier Air France • 31700 Blagnac-Toulouse 148 Company Project Airplane Maintenance Workshop SCIA User Contest 2005 / Steel constructions 4 Categorie
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