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Numerical simulations of three-point bending tests: two distinct approaches



Author(s): V.M.C.F. Cunha, J.A.O. Barros, J.M. Sena-Cruz
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: 1046 - 1058
Total Pages: 12
Language: English


Abstract: 
In this work are presented and discussed the numerical simulations carried out for indirect tensile tests of steel fibre reinforced self-compacting concrete specimens. The post-cracking behaviour was modelled with two distinct approaches. Within the scope of the first one, the σ-w relationships were obtained by an inverse analysis procedure up to distinct ultimate crack widths. The other approach consisted on modelling the behaviour of the composite based upon the micro-mechanical behaviour of the fibres. For this purpose the composite was modelled as two-phase material under the FEM basis, with an unreinforced concrete matrix phase (paste + aggregates) and a fibre phase. The fibre phase comprises information about fibre density and orientation depending on where and how the material is applied.


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