Localized failure in fiber-reinforced polymer-wrapped cylindrical concrete columns

This study investigates the localization of deformation and factors that influence the spread of damage zones in cylindrical concrete columns confined with fiber-reinforced polymer (FRP) wraps. The findings indicate that the effect of confining pressure on failure loads is strongly nonlinear with the confinement pressure required to exceed a threshold value to arrest shear band growth and lead to a significant gain in failure loads. The gain in column strength was influenced by the nature of the interfacial bond between concrete and FRP. Assuming a tied interface may significantly overestimate the confining pressure acting on the concrete. For a more realistic cohesively bonded interface, the confining pressure depends on the bond stiffness in addition to the properties of the FRP. Results of numerical analyses indicate that the confinement pressure must exceed a certain threshold value to arrest the growth of localization. Similarly small values of bond stiffness led to little or no increase in the failure loads.

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  • Authors:
    • Dandapat, Ramkrishna
    • Deb, Arghya
    • Bhattacharyya, S K
  • Publication Date: 2012-7


  • English

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  • Accession Number: 01449218
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 15 2012 10:31AM