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Master Thesis Year : 2013

Le viaduc de Garabit : un ouvrage réalisé par Gustave Eiffel


The Garabit Viaduct is a railway structure located in the Cantal, built in 1884 by Gustave Eiffel. This 122m high and 565m long viaduct enables to cross the Tuyere's gorges. This achievement can be seen as a technological feat because the possibilities at that time were lower (animals we were still used to bring the different structural elements on the site). As for the dimensioning made by Gustave Eiffel and his team, it was also done with the resources available at that time: Castigliano's theorems, Mohr's integrals, unit loads on different supports. With two bibliographical researches conducted by our two pairson the Garabit viaduct construction and on the life of Gustave Eiffel, we tried at first to understand how the steel giant had been built, and then we analyzed hypothesis for its dimensioning. To understand its dimensioning, we had to train first, on simpler systems before applying these theorems to the viaduct. After these steps, we were able to redesign, from Eiffel's report and original plans, a pile, a piece of deck, and the central arch on the Cadwork software called. It was then possible to have the neutral fibers of all elements and transfer them directly to dimensioning software to compare the results obtained by Mr. Eiffel and results generated by this software and obtained by our sales. We then examined the pieces that could be replaced by wood in this extraordinary structure, by implementing a calculation proper to our own material. This theoretical project, allowed us to deepen our skills in RDM, and to compare the technical capabilities of different ages. Gustave Eiffel, who seemed intellectually inaccessible before this study, is slightly less today.
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hal-01867359 , version 1 (04-09-2018)


  • HAL Id : hal-01867359 , version 1

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Clément Désire, Cédric Gruber. Le viaduc de Garabit : un ouvrage réalisé par Gustave Eiffel. Sciences de l'ingénieur [physics]. 2013. ⟨hal-01867359⟩
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