n Journal of the South African Institution of Civil Engineering = Joernaal van die Suid-Afrikaanse Instituut van Siviele Ingenieurswese - Characterising the shear behaviour of strainhardening fibre-reinforced cement-based composites : technical paper

Volume 49, Issue 2
  • ISSN : 1021-2019



Strain-hardening fibre-reinforced cement-based composites (SHCC) are a class of fibre-reinforced concrete (FRC) that, reinforced with relatively low volumes of short fibres, exhibit strain-hardening, tough tensile and flexural response. These qualities hold promise also for ductile, superior shear behaviour, which has been demonstrated in experimental projects internationally. The potential reduction or elimination of conventional steel shear reinforcement in reinforced concrete by the use of FRC, and in particular SHCC, is an example of how the tensile ductility properties of SHCC may be exploited. Other uses include generally improved ductility and durability of structures by selective use of these superior construction materials. However, the true shear behaviour of SHCC is not yet understood and analytical and design models have not yet been formulated due to a lack of an appropriate, accurate direct shear test method. This paper describes the investigation of the shear properties of SHCC. A modified Iosipescu shear test is developed for SHCC by finite element analysis. An experimental program of shear tests is subsequently reported, which aims to characterise the true shear mechanisms and properties of SHCC.

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