Advertisement

Effect of Wrap Thickness and Ply Orientation on Cracking and Failure of FRP-Wrapped Columns

  • Pradeep B. KodagEmail author
  • Gaurang R. Vesmawala
Conference paper
  • 734 Downloads

Abstract

The concrete structures deteriorate because of its exposure to adverse environmental conditions. It starts with corrosion of reinforcement, cracking, scaling, and which further cause spalling of concrete. These affect the strength and reduce the overall design life of the structure. The solution to this problem is fiber-reinforced polymer (FRP) jacketing which is one of the most effective retrofitting techniques available today. FRP jacketing is widely used nowadays because of its advantages such as high strength-to-weight ratio, corrosion resistant, and ease of application. In actual practice, columns are subjected to axial load along with uniaxial or biaxial bending due to unsymmetrical loading pattern. The aim of this study was to assess the effect of change in wrap thickness and ply orientation on the compressive strength of the column loaded axially and biaxially. The objectives of this study were to examine the composite action of the GFRP laminates at different load levels and to understand the associated cracking and failure analysis. Further, increase in wrap thickness, increases the load carrying capacity and ductility of the section. It is observed that change in ply orientation other than hoop direction adversely affects the load carrying capacity of the section.

Keywords

Cracking Failure analysis Biaxial columns Fiber-reinforced polymer Retrofitting 

References

  1. 1.
    S. Rocca, N. Galati, A. Nanni, Interaction diagram methodology for design of FRP confined reinforced concrete columns. Constr. Build. Mater. 23(4), 1508–1520 (2009)CrossRefGoogle Scholar
  2. 2.
    M.N.S. Hadi, Comparative study of eccentrically loaded FRP wrapped columns. Compos. Struct. 74(2), 127–135 (2006)CrossRefGoogle Scholar
  3. 3.
    M.N.S. Hadi, Behavior of FRP strengthened concrete columns under eccentric compression loading. Compos. Struct. 77, 92–96 (2007)CrossRefGoogle Scholar
  4. 4.
    M.H. Harajli, Axial stress—strain relationship for FRP confined circular and rectangular concrete columns. Cement Concr. Compos. 28(10), 938–948 (2006)CrossRefGoogle Scholar
  5. 5.
    H.J. Lin, Liao CL compressive strength of reinforced concrete column confined by composite material. Compos. Struct. 65(2), 239–250 (2004)CrossRefGoogle Scholar
  6. 6.
    El Maaddawy, Strengthening of eccentrically loaded reinforced concrete columns with fiber-reinforced polymer wrapping system: experimental investigation and analytical modeling. J. Compos. Constr. 13(1), 13–24 (2009)CrossRefGoogle Scholar
  7. 7.
    W. Punurai, C.T.T. Hsu, J. Chen, Biaxially loaded RC slender columns strengthened by CFRP composite fabrics. Eng. Struct. 46, 311–321 (2012)CrossRefGoogle Scholar
  8. 8.
    Alireza Rahai, Hamed Akbarpour, Experimental investigation on rectangular RC columns strengthened with CFRP composites underaxial load and biaxial bending. Compos. Struct. 108, 538–546 (2014)CrossRefGoogle Scholar
  9. 9.
    J. Li, M.N.S. Hadi, Behavior of externally confined high strength concrete columns under eccentric loading. Compos. Struct. 62(2), 145–153 (2003)CrossRefGoogle Scholar
  10. 10.
    Youcef Y, Amziane S, Chemrouk M, The influence of CFRP on the behavior of reinforced concrete subjected to buckling, in Proceedings of the 4th inter conf on FRP compos eng (CICE2008) (Zurich, Switzerland, 2008)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Department of Applied MechanicsSardar Vallabhbhai National Institute of TechnologySuratIndia

Personalised recommendations