Experimental Tests on Fibers Influence on the Size Effect on Shear - On Shear Behavior of Structural Elements Made of Steel Fiber Reinforced Concrete - page 101

It is essential to choose a proper value of the crack spacing for a good numerical
simulation represented by the distance between active shear cracks; otherwise,
simulations obtained will not represent well the actual behavior.

￿

A horizontal asymptote in the size effect law seems to be present (no further
decrease of shear resistance with larger beam sizes); however, further studies are
necessary to better understand the size effect in FRC and con

￿

rm this trend.

MC2010 evaluates properly the shear behavior and the size effect on beams,
having size signi

￿

cant for practice; RILEM and EHE08 give unsafe values for
H1000 PC and H1500 PC.

For PC beams a decreasing line on the graph SM versus increasing effective
depth was observed.

￿

5.6 Publication of These Results

The results of this paper have been published in the journal Materials & Structures:
Fausto Minelli; Antonio Conforti; Estefan a Cuenca; Giovanni Plizzari. ARE

STEEL FIBRES ABLE TO MITIGATE OR ELIMINATE SIZE EFFECT IN
SHEAR?. Materials & Structures. March 2014, Volume 47, Issue 3, pp 459

í

473.

-

Springer. DOI: 10.1617/s11527-013-0072-y .

References

1. ASTM.C1550-10a. 2002. Standard Test Method for Flexural Toughness of Fiber Reinforced
Concrete (Using Centrally Loaded Round Panel). West Conshohocken: ASTM International.
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prove su piastre sottili (in italian). Tesi di laurea, Universit à degli Studi di Brescia, Brescia,
Italy.
3. Conforti, A. 2014. Shear behavior of deep and wide-shallow beams in ber reinforced
concrete, 232. Ph.D. Thesis, Department of Civil, Architectural, Environmental, Land
Planning Engineering and of Mathematics, University of Brescia, May 2014, Aracne Editrice,
Roma, ISBN 978-88-548-7009-3.
4. Bentz, E. 2005. Empirical modelling of reinforced concrete shear strength size effect for
members without stirrups. ACI Structural Journal 102(2): 232 241.

5. Vecchio. VecTor analysis group. http://www.civ.utoronto.ca/vector/software.html .
6. MC2010. 2012. Fib Bulletin 65

-

— nal draft.
7. Montaignac, Massicotte and Charron. 2012. Design of SFRC structural elements:

66. Model Code

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fl exural

636.
8. RILEM, TC 162-TDF. 2003. Test and design methods for steel bre reinforced concrete,
stress-strain design method. Final recommendation. Materials and Structures 36: 560

behavior prediction. Materials and Structures 45(4): 623

-

567.

-

9. EHE-08. 2008. Instrucci ó n de Hormig ó n Estructural EHE-08 (in Spanish), 702. Madrid:

Ministerio de Fomento.
10. Minelli, F., Conforti, A., Cuenca, E., and G.A. Plizzari. 2014. Are steel bres able to mitigate
or eliminate size effect in shear? Materials and Structures 47(3): 459 - 473.