@ENPC – Mar. 2016 – A. Lebée, C. Chalumeaux, P. Lecomte

From design to fabrication in five days… This yearly workshop mixes third year engineering and architecture students in order to design and build a 6m span cardboard footbridge which must carry one pedestrian. They investigate corrugated and honeycomb cardboard strength and versatility as construction materials. Moreover, such a span requires detailed structural analysis and design. In the end, students not only get familiar with all the steps of the design process but make the physical experiment with their own body of the full scale realization.

Objectives

Designing and building a 6m span bridge which can support one person walking. The bridge is made of corrugated cardboard and honeycomb cardboard which may be glued. Students are first in groups of five for the preliminary design. Then they are gathered in groups of ten for the construction.

Learning

This intensive workshop is an opportunity for students to work together on a project they build and test in the end. Designing a bridge is indeed a difficult exercise which requires to discover all aspects of civil engineering and architecture. Indeed corrugated cardboard may be a rather strong construction material only if it is cleverly used. A 6m span bridge requires detailed calculation of the load capacity of the bridge and the final test (and failure) of the bridge is a very instructive experience for students

Teaching Material

Templates

Mar. 2016 

Mar. 2015 

Bow String Footbridge

Apr. 2013 

Features of the 2016 edition

For this sixth edition, the workshop took place in “la grande ruche” the open space of Ecole des Ponts ParisTech dedicated to transverse projects. We had three interesting footbridges suggested by a very motivated team of students: the Doubly Curved Footbridge, the Foldable Footbridge and the Japanese Stairs Footbridge

Doubly Curved Footbridge

The cross section of this footbridge is a “H”. In conventional design of such bridge, it is necessary to add transverse struts to ensure lateral stability of the primary beams. In the present case, this is not necessary thanks to the out-of-plane curvature of the deck and the in-plane curvature of the beams. Indeed their inserction is a non-planar curve which prevent the global rotation of the beams with respect to the deck.

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Foldable Footbridge

This footbridge is foldable in a single piece of 2mx2mx40cm. It may be tranported an deployed onsite. Detailed analysis and design was required for the hinges as you may notice in the report below.

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Japanese Stairs Footbridge

In this footbridge the deck is replaced by alternate steps exactly as in japanese stairs. In order to keep the minimalism of the idea, special care was needed to ensure that the steps would really ensure the lateral stabilization of the bridge.

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Team

Teachers: A. lebée, C. Chalumeaux, P. Lecomte

Foldable Footbridge: Capucine Madelaine, Victor Bontemps, Constance Bartoli, Quentin Jézégou, Camillia Zaninetti, Antoine François, Baptiste Lafoux, Côme de la Fouchardière, Léa Feid.

Doubly Curved Footbridge: Nils Bailly, Richard Caron, Louis Fréhel, Lucas Gauthier, Pierre Gilibert, Quentin Glévarec, Flore Gustin, Sarah Kirsch, Yanis Maacha, Thomas Nantier.

Japanese Stairs Footbridge: Alexandre Aheto, Thomas Bessard, Romain Durand, Sylvain Huchet, Katia Makhlouf, Gabriel Mayoud, Marion Okunowski, Olivier Rigal, Jessica Vatonne, Laury Zhou.