Identification of UHPFRC tensile behaviour: methodology based on bending tests

Author(s): F. Baby, B.A. Graybeal, P. Marchand, F. Toutlemonde
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: 649 – 658
Total Pages: 10
Language: English

Characterization methods of UHPFRC tensile behaviour have been developed to determine material response considering a given UHPFRC in a given structure. These methods are based on the four point bending test on unnotched specimens. An inverse analysis of the experimental results permits to deduce the “stress – strain” relationship (in the case of hardening UHPFRC) or “stress – crack opening” relationship (in the case of softening UHPFRC). The results depend on the assumptions taken into account for the inverse analysis. Thus, analysis methods have been developed which minimize the number of hypotheses to predict the most realistic design constitutive law. Considering different specimen sizes and two UHPFRC mixes, the results obtained from four point bending tests associated with the inverse analysis have been compared to those obtained with direct tensile tests. The effectiveness of the proposed method and particularly, its capability to derive a strainhardening or strain-softening constitutive law of the material from observed crack patterns has been shown.

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

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