T.M.T. Tensioned Modular Triangles Felipe Franco, Francesca Pernigotti, Giulia Malesani
Studio 9, 2016 KTH, Stockholm
Teachers: Jonas Runberger, Kayrokh Moattar, Elsa Wifstrand Sponsor: TyrĂŠns AB Structural Consultants: Rozan Kaivan, Rita Chedid (TyrĂŠns AB) 1
It was tested as an exhibition space to display the academic work of the students of studio 9 during the second smeester of 2016.
At the same time is an innovative object testing the adaptation of CNCrouted wood to a parametric design shape designed through Grasshopper. We tried out different prototypes of pavilion before getting to this final result and we couldn’t know before the construction if the wood would have replicated the + 3250 mm same smooth surface of the 3D model. We had to make a compromise between the blending performances of plywood, the structural stresses, the material costs, the modularity, the assembling time (we performed a parametric tagging system that allow us first to join the triangles in the 18 “stripes” and then everyone else to reassembly the pavilion) and the stocking volume.
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The developement of this project itself takes into account a very strong 4300 approach to computational and parametrical techniques, in order to evaluate the structural behaviour and material performance, focusing on obtaining ready-to-productions drawings, in order to fabricate the pavilion through computer aided manufacturing. 4300
TMT stays for Triangulated Mesh Tensioned and it is designed to be a temporary exhibition space for the projects board about the transformation of the Meatpacking district in Stockholm. A public showcase that could move across a rapidly changing area.
The shape responds to the programmatic requirements of having several exhibition panels on display. It also takes into consideration the need to be assembled, disassembled, stored and transported easily. The floor plan is based on a tri-axial symmetry and the skin was developed through mesh-relaxation techniques. The outer skin consists of wooden triangular panels that change their shape according to their position in the dome-like skin in order to optimize material performances. The structure, also entirely made of wood, was developed in collaboration with Tyréns structural engineers, who provided calculations and performance evaluations. The budget was around 30.000 SEK.
4300
4750
4300
5000
+ 3250 mm
4300
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PARAMETRIC MODEL
1. Define the triangulated patter and the size of the footprint. The pattern has 178 triangles. It has triple radial symmetry; each third is symmetric in itself.
2. Inflate the pattern with Kangaroo; the pattern is anchored to the ground in three different sections, by pulling the outermost points towards the footprint circles. Each triangle is actually a hexagonal shape with inner springs. From this point on, we will use only the three vertices of the triangles.
3. Modify the pattern changing the convexity of the triangle edges according to the position of each piece: The lower the piece is located, its edges tend to be convex. The higher the piece is located, its edges tend to be concave.
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-OFFSET
CONVEX
+OFFSET
CONCAVE
4. In order to make the structure lighter at the top and stiffer at the bottom, we generate an offset of the edges, based on the position of the piece: The lower the piece is, the offset is larger. The higher the piece is, the offset is smaller.
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5. In order to define the orientation of the piece, we filleted two of the inner corners of the triangles, so that the non-filleted corner points always downwards.
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6. Make the holes for the screws, which will be positioned at the vertices of the original triangles.
7. Create a tagging system embedded into the pieces themselves, in order to identify their orientation and position.
1 x3
2 x3
3 x3
4 x3
5 x3
6 x3
7 x1
8 x1
8. Nesting the pieces in order to optimize material use. We obtained: 2 different boards for 6mm pieces, cut 3 times each. 4 different boards for 4mm pieces, cut 3 times each. 2 different boards for the remaining 4mm pieces, cut once each.
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MODULARIZATION
The panels of the same colour are linked together by rivets and they can be folded and stock, in order to facilitate storage and transportation as well as handling during construction.
0 A B C
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Each stripe is then fixed on site to the adjacent stripes by screws and security bolts.
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D 4 E 5
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TAGGING SYSTEM
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0
1
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A
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B4
C
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NUMBER
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NUMBER
E
LETTER
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9
4 mm plywood
6 mm plywood
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