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Communication Dans Un Congrès Année : 2019

Space truss built with wastes from the sawmill industry

Résumé

It is well known that wood is difficult to assemble and complex steel system is often used for the joints. The solution proposed in this paper is to limit the use of steel connections by using a specific shape of element to take the shear force, thus linking the top and bottom layers of the space truss that are made of circular logs of small diameter. This proposal is a simpler version of the solution suggested in [5]. The material used for the shear components is waste wood from sawmill when the log is squared, it’s mostly composed of bark and sapwood. This part of log is considered as a waste and often used as firewood. This experimentation aims to promote that wood as a structural element in the space truss. The structure was designed by the laboratoire Navier/GSA and ENSAG. It was crafted, erected and tested by the IUT (institute for higher technician). The structure is 6 m by 6 m span and has a height of 0,6 m. The elements that link and brace the top and bottom layer create an hyperboloid that can be simply screwed as the element are tangent to the top circular chord and tangent to the lower circular chord. The structure was tested under symmetrical and asymmetrical loads. The deflections and a detailed observation of the connections during loading was performed using photogrammetry. The behavior of the structure was then compared to the numerical model. Finally, the authors conclude on the economical and environmental aspects of such structures.
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Dates et versions

hal-04571493 , version 1 (07-05-2024)

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  • HAL Id : hal-04571493 , version 1

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Olivier Baverel, Tiphaine Le Borgne, Francois Zaninetti, Gerald Hivin. Space truss built with wastes from the sawmill industry. Form and Force, IASS, Oct 2019, Barcelone, Spain. ⟨hal-04571493⟩
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