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Non-uniform stress distribution in FRP-wrapped circular concrete columns under uniform axial deformation

Conference Paper


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Abstract


  • The confinement of concrete columns using bonded FRP wraps has become a popular retrofit

    technique. Through extensive research in the last two decades, many stress-strain models have

    been developed for concrete in FRP-wrapped circular columns. All these models assume that

    the stress state is axisymmetric in an FRP-wrapped circular concrete column under concentric

    axial compression. This implies that the FRP wrap is assumed to be axisymmetric in

    geometry, but in reality such axisymmetry is not realised due to the existence of an

    overlapping zone. This paper presents a finite element investigation into the stress state in

    FRP-wrapped circular concrete columns considering the actual FRP wrap geometry used in

    laboratory tests and practice. The results show that common FRP wraps with an overlapping

    zone can lead to significant non-axisymmetric confinement to the concrete and hence a

    significantly non-uniform stress distribution in the concrete, even when the concrete is under

    uniform axial shortening.

UOW Authors


  •   Li, S Q. (external author)
  •   Chen, Jian Fei (external author)
  •   Yu, Tao
  •   Teng, Jin Guang. (external author)

Publication Date


  • 2012

Citation


  • Li, S. Q., Chen, J. F., Yu, T. & Teng, J. G. (2012). Non-uniform stress distribution in FRP-wrapped circular concrete columns under uniform axial deformation. Sixth International Conference on FRP Composites in Civil Engineering (pp. 1-8).

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1409&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/404

Start Page


  • 1

End Page


  • 8

Abstract


  • The confinement of concrete columns using bonded FRP wraps has become a popular retrofit

    technique. Through extensive research in the last two decades, many stress-strain models have

    been developed for concrete in FRP-wrapped circular columns. All these models assume that

    the stress state is axisymmetric in an FRP-wrapped circular concrete column under concentric

    axial compression. This implies that the FRP wrap is assumed to be axisymmetric in

    geometry, but in reality such axisymmetry is not realised due to the existence of an

    overlapping zone. This paper presents a finite element investigation into the stress state in

    FRP-wrapped circular concrete columns considering the actual FRP wrap geometry used in

    laboratory tests and practice. The results show that common FRP wraps with an overlapping

    zone can lead to significant non-axisymmetric confinement to the concrete and hence a

    significantly non-uniform stress distribution in the concrete, even when the concrete is under

    uniform axial shortening.

UOW Authors


  •   Li, S Q. (external author)
  •   Chen, Jian Fei (external author)
  •   Yu, Tao
  •   Teng, Jin Guang. (external author)

Publication Date


  • 2012

Citation


  • Li, S. Q., Chen, J. F., Yu, T. & Teng, J. G. (2012). Non-uniform stress distribution in FRP-wrapped circular concrete columns under uniform axial deformation. Sixth International Conference on FRP Composites in Civil Engineering (pp. 1-8).

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1409&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/404

Start Page


  • 1

End Page


  • 8