Investigation of bar buckling in columns confined with composite material jackets

Dionysios A. Bournas, T. C. Triantafillou

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

Abstract

The onset and evolution of bar buckling at the plastic hinge of old-type reinforced concrete (RC) columns confined with composite material [textile-reinforced mortar (TRM) and fiber-reinforced polymer (FRP)] jackets was investigated experimentally and analytically in this study. The interaction between composite jacket (or concrete cover, for unconfined concrete) and embedded longitudinal compression reinforcement at the onset and evolution of bar buckling was achieved through strain measurements of the compression reinforcement. Moreover, the implementation of a stress-strain confinement model, which relates lateral with axial strains, allowed the description and monitoring of the axial-lateral strain relationship at the base of the columns throughout the evolution of bar buckling. Finally, based on the aforementioned confinement model and on the experimental measurements, the post-buckling behaviour of columns was related with the stiffness of the jacket.

Original languageEnglish (US)
Title of host publication10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10
Subtitle of host publicationReinforced Polymer Reinforcement for Concrete Structures 2011
Pages117-134
Number of pages18
Edition275 SP
StatePublished - 2011
Event10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10, in conjunction with the ACI Spring 2011 Convention - Tampa, FL, United States
Duration: Apr 2 2011Apr 4 2011

Publication series

NameAmerican Concrete Institute, ACI Special Publication
Number275 SP
Volume1
ISSN (Print)0193-2527

Other

Other10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10, in conjunction with the ACI Spring 2011 Convention
CountryUnited States
CityTampa, FL
Period4/2/114/4/11

Keywords

  • Bar buckling
  • Confinement
  • FRP
  • Reinforced concrete
  • Seismic retrofitting
  • Textile-reinforced mortar (TRM)

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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  • Cite this

    Bournas, D. A., & Triantafillou, T. C. (2011). Investigation of bar buckling in columns confined with composite material jackets. In 10th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures 2011, FRPRCS-10: Reinforced Polymer Reinforcement for Concrete Structures 2011 (275 SP ed., pp. 117-134). (American Concrete Institute, ACI Special Publication; Vol. 1, No. 275 SP).