2011-2 roofing a multi functional outdoor pavilion

8/2/2019 2011-2 Roofing a Multi Functional Outdoor Pavilion

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ROOFING A MULTIFUNCTIONAL OUTDOOR COURT WITH FOUR HYPAR

FABRIC.ESCRIG, FELIX & SNCHEZ, JOS

The design corresponds to a roof for a multifunctional sport court with a

disposable area of 46x24 sqm. We decided to cover this area with a textilefabric geometrically defined by four hypar surfaces squared into a steelstructure. The particular of this design is that the four supports are placed in themiddle of the edges and not in the corners as is habitual. Then the structure hasa four wing roof with 23 m. of cantilever in the larger direction and 12 m. in theshorter. We introduce also precedents of this solution from other applications.

The composition of hypar for textile roofs merit forms that optimize the structuralbehavior like shell hypar do. Then we try to introduce a design of this kind tosolve a commitment of great size.

Between several possibilities for the composition we choose four similar formsconnected as shown in the figure 1.

Figure 1. Four hypar geometric composition in two different compositions.We have substituted the perimeter beam by a steel frame stabilized with cableslike is shown in the figure 2. This 20x20 sqm. solution is useful for instance toroof two paddle tracks.

For a rectangular shape we have proposed a 30x20 sqm. area which cover twoplaying tracks and grandstands also, like shown in the figure 3 where supportshave been reinforced by adding a new branch.

Figure 2. Proposal to cover two paddle tracks with a cantilever four wings roofwith a height of 6 to 10 m


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Figure 3. Proposal to cover two paddle tracks with a cantilever four wings roofstands included with a height of 6 to 10 m.

These two proposals had never been built but were useful to propose a coverover a new playing ground for multifunction purposes, like shown in the figure 4for a 40x20 sqm. area.

But because the real dimension would be 46x24 we needed to extend the coverin reinforcing the steel frame. Otherwise it was necessary to add new elements

like a sliding fabric wall and to consider the possibility of drainage directly to thesink.


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Figure 4. First proposal to roof a playing court dimensioning 40x20 sqm.

Figure 5. Final proposal to roof a playing court dimensioning 46x24 sqm.

Finally we adopted a new version of the same proposal like shown in the figure5, in which the dimension was 46x24 and were the steel structure was been

reinforced.


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Figure 6. Aspect of the final proposal with all the structural elements included.

Figure 7. Particular of singular pieces:a) The main support in the larger border.b) Solution of the corner.c) The main support at the shorter border.d) The crown where the main girders are crossing.

After a few considerations we organized the structure considered in figures 6, 7and 8. by adding some achievements:


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- Stabilizing cables into the lateral frames.- Sliding curtain wall to close and open the lateral enclosure.- Ventilation system on the crown of the roof.

Figure 8. Cutting patterns of textile roof and lateral enclosure.

The structure consists in pipes of 323.8 for the main pieces and 120.5 forthe secondary ones. All pieces are prepared in a factory and transported at thesite to be erected by welding like shown in figures 9, 10 and 11.

Figure 9. Manufacturing the structures at the factory.


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Figure 10. Printing and painting the structure.

Figure 11. Transporting the structure.

This dimensioning needs to provide transversal stiffeners crossing over the roofto resist lateral tension of the fabric, three pieces for each wing and a corner

diagonal stiffener like can be seen in the figure 12.

The analysis has been carried on with a membrane analysis for the tensionfabric and by means of the SAP2000 software for the steel structures andseparately substituting the membrane by its forces over the steel structure likeshown in the figure 13.

After the steel structure was completely finished we proceeded to hang thefabric in four pieces like is shown in figures 14 and 15.


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Figure 12. Mounting the structure with pieces necessary to achieve a completerigidity.

Figure 13. SAP model for the structural analysis.


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Figure 14. Hanging the fabric roof.

Figure 15. Hanging the fabric roof.

Figure 16. Detail of the constructive solution at the corner.


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In the figure 16 we show a particular of constructive details of the cornerswhere it is difficult to solve the union between the roof and two lateral piecesand also to tense all the assembly together.

In the figure 17 we show the solution to pass behind the main support and in the

figure 18 we can see the finished roof from a lateral view.

Figure 17. Detail of the constructive solution to pass in front of the main support.

Figure 18. Lateral view where we can see two main cantilevers.

Once the main works had been finished we proceeded to paint the ground, toinstall de lateral sliding curtain wall and to install electrical supplies (Figure 19).In figures 20 and 21 we can see the internal view and the lighting system. Withrespect this point we always project the focus trough the roof and never to theground because it proportion a more uniform level of light. In the figure 22 and23 we can see to views at night.


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Figure 19. Air view of the building once has been finished included the lateralcurtain walls.

Figure 20. Interior view with walls folded.


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Figure 21. Interior view with extended walls.

Figure 22. External view of the building at night.

REFERENCES:

ESCRIG,F. SNCHEZ, J. Textile river over participants street. Expo Zaragoza2008 Tensinews Newsletter n 16 April 2009 pp 20-22. ISSN 1784-5688.FOSTER, B., MOLLAERT M. European Design Guide for tensile surfacestructures. Tensinet 2004 Brussels. ISBN 90 8086 871x


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Figure 23. Internal view of the pavilion at the night.

CREDITS.

Name of the project: Roof over an uncovered sport multifunctional field in theCartuja of Seville.Location address: SevilleClient (investor): Junta de AndaluciaFunction of building: to shadowing a sport fieldType of application of the membrane: Roofs and CanopiesYear of construction: 2010Architects: Felix Escrig and Jos SnchezMulti disciplinary engineering: Performance S.L.Structural engineers: Performance S.L.

Consulting engineer for the membrane: Performance S.L.Engineering of the controlling mechanism: Performance S.L.Main contractor: SANROCON S.A.Contractor for the membrane: ARQUITECTURA TXTIL S.L.Supplier of the membrane material:Manufacture and installation: ARQUITECTURA TEXTIL S.L.Material: Roof: Naizil Type III, Wall: VALMEX TF 400 MEHELERCovered surface: 1104 m

2011-2 roofing a multi functional outdoor pavilion

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