A technique for reducing strain concentrations in FRP wrapped concrete columns

Jian Fei Chen, Shi Chang Peng, Jun Deng, Guang Ming Chen, Yi Tao

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

    Abstract

    Existing studies have shown conclusively that the measured fibre reinforced polymer (FRP) rupture strain in FRP wrapped concrete columns is usually significantly smaller than the rupture strain obtained from flat coupon tests. One of the main causes for this phenomenon is the existence of geometrical discontinuities at both ends of the FRP sheets. This study proposes a new strengthening method in which continuous FRP spiral wrapping is used to eliminate strain concentrations due to the geometrical discontinuities and thus increase the FRP rupture strain at column failure. The effect of the spiral angle of FRP on the FRP rupture strain in FRP wrapped specimens was experimentally investigated. The test results indicate that the spiral wrapping with a small angle with respect to the column circumference can significantly increase the strain efficiency of FRP and thus enhance the axial compression capacity of the strengthened cylinders.

    Original languageEnglish
    Title of host publicationProceedings of the 7th International Conference on FRP Composites in Civil Engineering, CICE 2014
    PublisherInternational Institute for FRP in Construction (IIFC)
    ISBN (Print)9781771363082
    Publication statusPublished - 2014
    Event7th International Conference on FRP Composites in Civil Engineering, CICE 2014 - Vancouver, Canada
    Duration: 20 Aug 201422 Aug 2014

    Conference

    Conference7th International Conference on FRP Composites in Civil Engineering, CICE 2014
    CountryCanada
    CityVancouver
    Period20/08/201422/08/2014

    ASJC Scopus subject areas

    • Polymers and Plastics
    • Civil and Structural Engineering

    Fingerprint Dive into the research topics of 'A technique for reducing strain concentrations in FRP wrapped concrete columns'. Together they form a unique fingerprint.

  • Cite this

    Chen, J. F., Peng, S. C., Deng, J., Chen, G. M., & Tao, Y. (2014). A technique for reducing strain concentrations in FRP wrapped concrete columns. In Proceedings of the 7th International Conference on FRP Composites in Civil Engineering, CICE 2014 International Institute for FRP in Construction (IIFC).