A comparative study between experimental and numerical analyses of steel fibre reinforced self-compacting concrete structural behavior

Author(s): S.S. Penna, P.C. Guetti, R.S. Pitangueira, G.O. Ribeiro, P. Serna
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: 994 - 1006
Total Pages: 12
Language: English

This paper presents numerical and experimental results of the behavior of Steel Fibre Reinforced Self-Compacting Concrete (SFRSCC). The main objective of the research is the study of the SFRSCC mechanical behavior including the post-peak softening response. An experimental program has been developed to evaluate the influence of aggregate size, granulometry, compressive and tensile strength, steel fibre type and the fibre amount in SFRSCC structural behavior. Three point bending notched tests as well as compression and splitting tension tests have been performed to evaluate the SFRSCC properties. Eight mix proportions have been designed and used in order to achieve nominal compressive strengths of 30 and 50 MPa. The mixtures were composed with two maximum size of crushed limestone, of 12 and 20 mm; fibres with aspect ratio (length/diameter) (lf/df); lf/df > 65 or lf/df < 65; and amount of steel fibres of 40 kg/m3 and 70 kg/m3. The experimental results are represented by load-CMOD (crack mouth opening displacement) curves of 24 beams, which have been used to determine the residual flexural tensile strength according to RILEM TC 162-TDF recommendation. Such results are compared to correspondent answer obtained by numerical simulations, which were based on a scalar damage finite element constitutive model. The damage evolution is taken into account by means of exponential and polynomial laws and an equivalent strain, evaluated from the split of the strain tensor into volumetric and deviatoric components. The present comparative study has shown a pretty good adjustment between numerical and experimental results in such way that contributes to better understanding the influence of the mentioned parameters in the structural ductility.

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

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