Preliminary calculations and casting stages of a UHPFRC truss footbridge

Author(s): J.A. López, P. Serna, E. Camacho, J. Navarro
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 1344 - 1356
Total Pages: 12
Language: English

Abstract: 
An innovative design of a 45-metre span UHPFRC footbridge, its casting process, and also preliminary calculations are presented in this paper. The resisting system consists of two identical trusses of variable depth, in which the compressed chord is also used as a railing. There is an intermediate curved ribbed slab connecting both trusses which works as the bridge deck, as well as a third truss that connects the bottom chords. The diagonals of the main trusses are shorter at the supports than at midspan, making the transmission of shear loads along the footbridge possible. The whole footbridge is decided to be cast in four stages at a precasting factory, and transported to the final place in only one segment. The casting process generates construction joints making a special study necessary. Buckling problems on top chords and cracking process in tensile diagonals have also been studied. The final design results in a very aesthetic, functional and safe footbridge, which may become the first UHPFRC truss pedestrian bridge. Casting process and a brief study of structural problems are presented.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00