Exploitation of test results to validate some formulas in the revised french recommendations for UHPFRC

Author(s): B. Fouré
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: 539 – 548
Total Pages: 10
Language: English

Abstract: 
Methods or formulas for the design of FRC structures in general, and UHPFRC structures particularly, need validation by tests. In most cases, published FRC structural test results lack a valid characterisation of the material. To remedy this, a preliminary study aims to provide an estimation of the maximum post-cracking strength of fibre concrete, based on a formula including an orientation factor ψ which is the main unknown inducing the great scatter of the experimental results, and the ultimate bond strength of the fibres which can be obtain directly from pull-out tests on single fibres, or indirectly from the experimental post-cracking tensile strength with an assumption on ψ. Then several studies with a validation on test results are done: constitutive law in compression (including confinement effect of fibres); formula for bond strength of rebars in FRC enhanced by fibres; formula to estimate the crack spacing in FRC elements with rebars; exploitation of push-off tests for application to the shear strength of keys in precast elements.

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