Innovative solution for strengthening orthotropic decks using UHPFRC: the Illzach bridge

Author(s): Z. Hajar, M. Novarin, C. Servant, G. Généreux, D. Przybyla, D. Bitar
Paper category: Symposium
Book title: RILEM-fib-AFGC International Symposium on Ultra-High Performance Fibre-Reinforced Concrete
Editor(s): F. Toutlemonde, J. Resplendino
Print ISBN: 978-2-35158-130-8
e-ISBN: 978-2-35158-131-5
Publisher: RILEM Publications S.A.R.L
Pages: 117 – 126
Total Pages: 10
Language: English

The technical solution (Orthodalle process) for repair of the bridge on the local RD201 road over the Huningue canal in Illzach, near Mulhouse, eastern France, was derived from the Orthoplus research programme initiated in November 2006 by the French National Research Agency. The main objective of the Orthoplus research project coordinated by Sétra (French Highways Technical Agency) was to develop theoretical and methodological resources for taking account of the thickness and type of road overlay when calculating the fatigue strength of a steel bridge with an orthotropic deck. These resources were then used to develop an innovative thin wearing course made with ultra-high performance fibre-reinforced concrete (UHPFRC). The Orthodalle process uses the strength and durability properties of UHPFRC to extend the service lifetime of existing orthotropic slabs or, more generally, any other steel-framed structures. This article presents the main steps of the project: the design of the UHPFRC element for strengthening the orthotropic deck, the suitability tests performed on full-scale elements before the works, the precasting of slabs, the reinforcement works, and the validation of the trial comparing measurement campaigns carried out before and after the works.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00

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