Effects of unconfined concrete strength on FRP confinement of concrete

Luke Bisby, Shiqing Li, Ben Duerden, Kirsty McLarty, Jian Fei Chen, Tim Stratford

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

2 Citations (Scopus)

Abstract

Research has shown that fibre reinforced polymer (FRP) wraps are effective for strengthening concrete columns for increased axial and flexural load and deformation capacity, and this technique is now used around the world. The experimental study presented in this paper is focused on the mechanics of FRP confined concrete, with a particular emphasis on the influence of the unconfined concrete compressive strength on confinement effectiveness and hoop strain efficiency. An experimental programme was undertaken to study the compressive strength and stress-strain behaviour of unconfined and FRP confined concrete cylinders of different concrete strength but otherwise similar mix designs, aggregates, and constituents. This was accomplished by varying only the water-to-cement ratio during concrete mixing operations. Through the use of high-resolution digital image correlation to measure both axial and hoop strains, the observations yield insights into the mechanics of FRP confinement of concretes of similar composition but with varying unconfined concrete compressive strength.

Original languageEnglish
Title of host publicationProceedings of the 6th International Conference on FRP Composites in Civil Engineering, CICE 2012
PublisherInternational Institute for FRP in Construction (IIFC)
Publication statusPublished - 2012
Event6th International Conference on FRP Composites in Civil Engineering, CICE 2012 - Rome, Italy
Duration: 13 Jun 201215 Jun 2012

Conference

Conference6th International Conference on FRP Composites in Civil Engineering, CICE 2012
CountryItaly
CityRome
Period13/06/201215/06/2012

Keywords

  • Columns
  • Concrete
  • Confinement modelling
  • FRP
  • Repair
  • Strengthening

ASJC Scopus subject areas

  • Polymers and Plastics
  • Civil and Structural Engineering

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  • Cite this

    Bisby, L., Li, S., Duerden, B., McLarty, K., Chen, J. F., & Stratford, T. (2012). Effects of unconfined concrete strength on FRP confinement of concrete. In Proceedings of the 6th International Conference on FRP Composites in Civil Engineering, CICE 2012 International Institute for FRP in Construction (IIFC).