Lateral confinement of concrete using FRP reinforcement

A. Nanni, M. S. Norris, N. M. Bradford

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

37 Scopus citations


Lateral confinement of concrete members by means of spirally wrapping fiber-reinforced-plastic (FRP) composites onto the concrete surface may increase compressive strength and ultimate strain (pseudo-ductility). It may also provide a mechanism for shear resistance, and inhibit longitudinal steel reinforcement buckling. Lateral confinement of concrete members as a strengthening/repair technology is expected to have an impact in the rehabilitation/renovation of buildings and infrastructure. Structures that have been damaged, or need to comply with new code requirements, or are subjected to more severe usage are the primary targets. In this project, an experimental and analytical study of concrete strengthened with FRP lateral confinement is conducted using compression cylinders (300 and 600 mm in length) and 1/4 scale column-type specimens. The latter specimens have a circular cross section and given longitudinal/transverse steel reinforcement characteristics. Column-type specimens are subjected to cyclic flexure with and without axial compression. When an aramid FRP tape is used as the lateral reinforcement, the variables are tape area and spiral pitch. In the case of filament winding with glass fiber, the thickness of the FRP shell is varied. The limited experimental results obtained at this stage of the research program indicate that lateral confinement significantly increases compressive strength and pseudo-ductility under uniaxial compression.

Original languageEnglish (US)
Title of host publicationFiber-Reinforced-Plastic Reinforcement for Concrete Structures - International Symposium
EditorsAntonio Nanni, Charles W. Dolan
PublisherAmerican Concrete Institute
Number of pages17
ISBN (Electronic)9780870316364
StatePublished - Sep 1 1993
Externally publishedYes
Event1993 International Symposium on Fiber-Reinforced-Plastic Reinforcement for Concrete Structures - Vancouver, Canada
Duration: Mar 28 1993Mar 31 1993

Publication series

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


Conference1993 International Symposium on Fiber-Reinforced-Plastic Reinforcement for Concrete Structures


  • Bend tests
  • Compression tests
  • Concretes
  • Fiber reinforced plastics: fibers
  • Glass fibers
  • Lateral confinement
  • Loading tests
  • Reinforcing materials
  • Repairs
  • Strengthening
  • Wrapping

ASJC Scopus subject areas

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


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