Steel fibre reinforced concrete: From x-ray imaging observation to modelling

Ng, T.; Htut, Trevor; Foster, S.

Access Status

Fulltext not available

Authors

Ng, T.

Htut, Trevor

Foster, S.

Date

2017

Type

Conference Paper

Metadata

Show full item record

Citation

Ng, T. and Htut, T. and Foster, S. 2017. Steel fibre reinforced concrete: From x-ray imaging observation to modelling, pp. 407-413.

Source Title

Mechanics of Structures and Materials: Advancements and Challenges - Proceedings of the 24th Australasian Conference on the Mechanics of Structures and Materials, ACMSM24 2016

ISBN

9781138029934

School

School of Civil and Mechanical Engineering (CME)

URI

http://hdl.handle.net/20.500.11937/63162

Collection

Curtin Research Publications

Abstract

© 2017 Taylor & Francis Group, London. In developing the constitutive model for steel fibre reinforced concrete, insight of the fibre behaviour in tension is vital. This paper reports on the behavioural observation of steel fibre reinforced concrete in tension using X-ray imaging. It is observed that crack paths find ways of minimum resistance; (i) through a section with poor fibre dispersion and/or (ii) divert around fibre ends, where possible. The results of X-ray imaging analysis are reviewed and statistical models for fibre dispersion are presented. Together, a revised fibre bond stress model in the Unified Variable Engagement Model is also proposed; taking into account the limiting maximum fibre volume percentage for which, beyond the limit, additional fibre content does not further improve the tensile performance due to the weaker cementitious matrix and crack paths are likely to divert around fibre ends.