Quantification of cracking localization in fibre-reinforced concrete beams

S. Werzbrger, Y. S. Karinski, A. N. Dancygier

Research output: Contribution to journalConference articlepeer-review

Abstract

The paper presents an analysis of cracking localization in beams made of fibre-reinforced concrete with conventional reinforcement. This phenomenon has been quantified by the ratio m/n between the number of the significantly wide cracks and the total number of flexural cracks that developed within the constant moment zone of the beams. It is shown that beams with larger reinforcement ratio had larger values of m/n, that is, lower cracking localization. For the given concrete mix, when the reinforcement ratios ρ were larger than ∼2% cracking localization was diminished. Furthermore, for low values of ρ, m/n ratios of the specimens with lower fibre contents are somewhat larger than those of the specimens with larger content. It is also shown that as the reinforcement ratio decreases below ∼0.5% the normalized mid-span ultimate deflections decreases as well, which corresponds with the observation of the cracking localization phenomenon for low reinforcement ratios. For larger reinforcement ratio, when m/n increases above ∼0.6, there is no effect of cracking localization on the ultimate deflection. Moreover, in this range of r the values of d are 1.0, as commonly expected for RFC structural elements. It is noted that the ultimate deflection of the beams corresponds to their flexural ductility.

Original languageEnglish
Article number012024
JournalIOP Conference Series: Materials Science and Engineering
Volume246
Issue number1
DOIs
StatePublished - 16 Oct 2017
Event9th International Conference Fibre Concrete 2017 - Prague, Czech Republic
Duration: 13 Sep 201716 Sep 2017

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Materials Science

Fingerprint

Dive into the research topics of 'Quantification of cracking localization in fibre-reinforced concrete beams'. Together they form a unique fingerprint.

Cite this