非常感谢CODA将以下内容授权gooood发行。更多请至：CODA on gooood
Appreciation towards CODA for providing the following description:

CODA是一个专门研究通过计算机设计并优化轻量结构的小组，最终的目标是通过技术和效率减少建筑行业的生态耗费。同时他们也坚信，科技发展会带来普世性的解决方案。最近他们的研究主要集中在木结构的弹性与变形。2013年某个星期，8名成员在匈牙利木建筑结构节上安装了这个名叫BigO的环形木壳。这个坚固的结构由十分简单的元素—一系列笔直平滑的木板组成。这些4米长的木板被成员手工切割组合成100条9.5长的单元条，然后进行现场组装。木板的弯曲产生了很好的预应力，在这个设计中，修长而相互交叉的木板，因各自的力叠加而变得牢固。设计使得低技实现了高效的结果。整个现场在与其它项目组研究学习交流的良好氛围下实现了建造。

CODA (Computational Design Affairs ) is a research group at BarcelonaTech (Universitat Politècnica de Catalunya ). Their research is focused on the creation and optimization of lightweight structures by means of computational design . Its ultimate goal is to reduce the ecological footprint of the building industry through technological efficiency. On the other hand, the group believe that technological development must be democratic, and solutions universally accessible. Their recent research focuses on the instrumentalization of the elastic deformation of timber structures.

CODA members Enrique Soriano and Pep Tornabell, were invited to participate in HelloWood festival held each year in Hungary and bringing together young designers and architects around wood construction. For a week and with the help of 8 students, the group stepped forward in their research by conducting the project BigO, a toroidal wooden shell. The aim was to build a very rigid structure but keeping affordability by assembling simple elements. The strategy was making a simple thin double curved shell from slender straight flat planks of massive timber.

Being a summer workshop, simple constructive solutions were welcome. This context forced pragmatic solutions: the structure was assembled with 100 identical pieces of 9.5 meters that were manufactured on a specifically built table. Original raw planks were approximately 4 meters, with a section of 1 x 10 cm, so they had to be joint, cut, marked and bored. Genuine digital manufacturing, not done by robots, but by enthusiastic students with much precision. Both the detailing and the the setting-out on site were solved with students experiencing specific material in- situ.

The experience produced two conclusions. The first is that the combination of anticlastic curvature and surface synclastic produced a highly torsioned geodesic curve, that induced high prestresses in the planks, not only from the bending from the torsion. The grid of coupled slender flexible planks, was then self-stiffened by the counteraction of the prestresses. The structure was achieved maintaining a low profile technology for a highly efficient result.The second conclusion is that the group would definitely not have been able to reach a similar result without the extraordinary good atmosphere in the festival. The experience of researching, exchanging, and learning to implement constructive solutions with the other groups was highly rewarding.

authors: Enrique Soriano y Pep Tornabell de CODA BarcelonaTech
Location: Csorompuszta, Hungría
Colaboradorators: Peter Krompáczki, Alma Tóth, Dóri Komlóssy, Akos Takacs, Paul,
Irina , Marta Ventura, Daphne Zografou
Surface: 75 m2
photo credit: Somoskoi Gabor, Donat Kekesi, Peter Krompáczki, Enrique Soriano

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