Analysis of a UHPFRC footbridge with a deck slab under bending by a novel fracture-micromechanics FEM model

Author(s): T. Guénet, L. Sorelli, D. Corvez, J. Bastien, F. Toutlemonde, E. Ferrier, L. Michel
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: 519 – 528
Total Pages: 10
Language: English

Ultra High Performance Fibre Reinforced Concrete (UHPFRC) structures are emerging in several engineering applications as their outstanding tensile strength and ductility allow engineers to develop new structural concepts and overcome construction limits. This paper focuses on the structural analysis of a new UHPFRC deck footbridge originally designed for Blandan Park in Lyon, France using a new fracture micromechanics Finite Element model. The latter was recently developed to describe the fibre pullout and the matrix cracking within the framework of fracture mechanics. The orientation of fibres was taken into account by statistically averaging a micro-mechanical model which describes debonding and pulling out of fibres from a cement matrix. We first calibrated the model parameters on the stress-strain relationship derived from 3-point bending tests of UHPFRC with 1.25 % stainless steel fibres. Different casting procedures were simulated by changing dispersion on fibre orientation.

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

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