Effect of coarse aggregates on FRP strain distribution in an FRP-to-concrete bonded joint

Ya-Qi Li, Esmaeel Esmaeeli, Jian Fei Chen, Wei Sha, Marios Soutsos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

Advanced fibre-reinforced polymer (FRP) composites have been widely used for strengtheningconcrete structures. The bond behaviour between FRP and concrete plays the crucial role in thistechnique. Commonly the test of this bond behaviour is conducted using a single or double shear pulloff test of an FRP-to-concrete bonded joint, or similar bending tests. Such test setups are usuallymodelled as a two dimensional (2D) plane stress or plane strain structure. However, the test setup is inreality a three-dimensional (3D) structure due to many factors. One of the main factors is that theconcrete behaviour is three dimensional because of the presence of coarse aggregates. Because ofthe random distribution of coarse aggregates in concrete, it may be expected that the non-uniformity ofstrain distribution is also random. Compared to concrete, mortar is a much more uniform material. Inthe research work presented in this paper, an experimental study is employed to investigate the straindistribution in the FRP in a bond test, where the FRP was bonded to either concrete or mortar. Theresults confirm that the presence of coarse aggregates in the concrete leads to much more variation inthe FRP strain distribution.

Original languageEnglish
Title of host publication 9th Biennial Conference on Advanced Composites in Construction 2019, ACIC 2019 03/09/2019 → 05/09/2019 Birmingham, United Kingdom: Proceedings
Pages189-194
Number of pages6
Publication statusEarly online date - 01 Oct 2019
Event9th Biennial Conference on Advanced Composites in Construction 2019, ACIC 2019 - Birmingham, United Kingdom
Duration: 03 Sep 201905 Sep 2019

Conference

Conference9th Biennial Conference on Advanced Composites in Construction 2019, ACIC 2019
CountryUnited Kingdom
CityBirmingham
Period03/09/201905/09/2019

ASJC Scopus subject areas

  • Ceramics and Composites
  • Building and Construction

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