Behavior of externally confined concrete columns

H. Saadatmanesh, M. R. Ehsani, M. W. Li

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

6 Scopus citations


Fiber composites have become increasingly popular in the civil engineering community in recent years. The primary area of research and development of fiber composites in the concrete industry has been related to fiber-reinforced-plastic (FRP) rebars. This paper presents a different application of fiber composites in concrete structures; namely, confinement of concrete columns with fiber composite wraps for improved ductility and seismic performance. The confinement is accomplished by wrapping thin, high-strength fiber composite belts around the columns. The belts are made very thin to result in sufficient flexibility for them to be wrapped around the circular as well as rectangular columns. The belts can be wrapped around the column in individual rings or in a continuous spiral. The ends of the belts can be mechanically coupled or the belts could be epoxy bonded to the column. The confinement provided by the belts results in significant increase in the crushing strain of concrete well above that of unconfined concrete. This will improve the overall strength and ductility of the column. The paper presents the results of an analytical study and an ongoing experimental study of concrete columns externally confined with fiber composite wraps.

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


  • Bridges (structures)
  • Carbon
  • Columns (supports)
  • Composite materials
  • Confined concrete
  • Ductility
  • Earthquake resistant structures
  • Fiber reinforced plastics
  • Glass
  • Shear strength
  • Strengthening
  • Wrapping

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science


Dive into the research topics of 'Behavior of externally confined concrete columns'. Together they form a unique fingerprint.

Cite this