Incorporation of micro-cracking and fibre bridging mechanisms in constitutive modelling of fibre reinforced concrete

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dc.contributor.authorLe, L.A.
dc.contributor.authorNguyen, G.D.
dc.contributor.authorBui, H.H.
dc.contributor.authorSheikh, A.H.
dc.contributor.authorKotousov, A.
dc.date.issued2019
dc.description.abstractThe formation and propagation of cracks under progressive loading in fibre reinforce concrete (FRC) are significantly influenced by fibre bridging mechanisms. Cracking and fibre bridging, governed by the FRC constituents and their properties, are two coupled and interacting phenomena that significantly affect the ductility and transition from diffuse to localised deformation. Constitutive modelling of FRC is challenging due to the high inhomogeneity and complex transition of deformations stages rooted from the difference in responses of cracked and intact material volumes coupled with cohesive resistance and fibre bridging of a crack. In this paper, a new approach to constitutive modelling of FRC is developed by enriching the constitutive structure to accommodate different responses of the crack, intact material and fibres. The strain discontinuity caused by cracks is accounted for via an enriched strain field which facilitates the introduction of the two interacting mechanisms, cohesive cracking and fibre bridging, in the constitutive model. The transition from diffuse to localised deformation is controlled by the fibre volume content and local deformation, via the density of active cracks. It is demonstrated that the proposed constitutive model is capable of describing the transition from diffuse to localised deformation associated with different macro responses under different loading conditions.
dc.description.statementofresponsibilityLinh A.Le, Giang D.Nguyen, Ha H.Bui, Abdul H.Sheikh, Andrei Kotousov
dc.identifier.citationJournal of the Mechanics and Physics of Solids, 2019; 133:10372-1-10372-27
dc.identifier.doi10.1016/j.jmps.2019.103732
dc.identifier.issn0022-5096
dc.identifier.issn1873-4782
dc.identifier.orcidSheikh, A.H. [0000-0002-2839-1707]
dc.identifier.orcidKotousov, A. [0000-0001-9337-5095]
dc.identifier.urihttps://hdl.handle.net/2440/132130
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/FT140100408
dc.relation.granthttp://purl.org/au-research/grants/arc/DP160100775
dc.relation.granthttp://purl.org/au-research/grants/arc/DP170103793
dc.relation.granthttp://purl.org/au-research/grants/arc/DP190102779
dc.rights© 2019 Elsevier Ltd. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.jmps.2019.103732
dc.subjectConstitutive modelling; fibre reinforced concrete (FRC); fibre bridging; cohesive crack
dc.titleIncorporation of micro-cracking and fibre bridging mechanisms in constitutive modelling of fibre reinforced concrete
dc.typeJournal article
pubs.publication-statusPublished

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