Stability and robustness of a 300 m² Composite Gridshell Structure

Frédéric Tayeb (1, 2, 3) , Jean-François Caron (1, 3) , Olivier Baverel (1, 3) , Lionel Du Peloux (1, 3)

1 navier umr 8205 - Laboratoire Navier
2 Communauté Université Paris-Est
3 msa - Matériaux et Structures Architecturés

In this paper, ductility aspects of a lightweight composite gridshell are developed. A gridshell is a very light structure that can support relative high loads. For many reasons, the materials used by the Navier laboratory are glass fibre reinforced polymers (GFRP) that have elastic brittle behaviour. To ensure the safety of people these structures have to behave in a ductile way, that is to say they must not collapse without showing signs of weakness. This paper deals with the pseudo-ductile behaviour of the GFRP gridshells designed by the Architected Structures and Materials research unit of Navier laboratory. After a reminding context about gridshells, the buckling of the Solidays' festival gridshell prototype (June 2011) is considered. It is demonstrated that buckling has to be avoided carefully because it fosters high stresses in the beams and may lead to a brutal collapse of the structure. Then it is shown that, under Ultimate Limit State (ULS), the gridshell prototype is far from buckling. Finally, a simulation of accident is performed: from the ULS, several elements are broken in order to understand the behaviour of the structure in case of accident. The pseudo-ductility of the structure is demonstrated thanks to the redundancy of the structural concept of the gridshell.

Mots clés: pseudo-ductility; non-linear analysis; redundancy; ultimate limit state; Gridshell; GFRP

Domaines: Mécanique des structures [physics.class-ph]; Matériaux; Génie civil

Frédéric Tayeb, Jean-François Caron, Olivier Baverel, Lionel Du Peloux. Stability and robustness of a 300 m² Composite Gridshell Structure. Construction and Building Materials, 2013, 49, pp.926-938. ⟨10.1016/j.conbuildmat.2013.04.036⟩. ⟨hal-01774639⟩