LIMITING STRAINS OF CONCRETE CONFINED BY RECTANGULAR HOOPS

Tests were performed on 17 specimens to evaluate the effects of rectangular hoops as confinement reinforcement. The results were used to determine the effective stress-versus-strain relationship of confined concrete. Controlled variables included hoop size, hoop spacing, amount of longitudinal reinforcement, concrete strength, and size of specimen. All arrangements of rectangular hoops were effective in significantly increasing limiting concrete strains. For specimens with hoop reinforcement meeting the requirements of Appendix A of the 1971 ACI Building Code, limiting concrete strains exceeded 0.015. Spacing and amount of transverse reinforcement were the primary variables affecting the limiting-strain capacity of the test specimens. /Author/

• Corporate Authors:

  Portland Cement Association

  5420 Old Orchard Road
  Skokie, IL  United States  60077
• Authors:
  • Kaar, P H
  • FIORATO, A E
  • Carpenter, J E
  • Corley, W G
• Publication Date: 1978

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Deformation curve; Reinforced concrete
• Old TRIS Terms: Hoops
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00179357
• Record Type: Publication
• Report/Paper Numbers: RD053.01D
• Files: TRIS
• Created Date: Aug 27 1978 12:00AM