PLACEMENT ERRORS FOR REINFORCING IN CONCRETE COLUMNS

This paper provides information on the distribution of bar placement errors and illustrates the influence of these errors on column strength. Studies of bar locations in 232 columns from 12 existing buildings have shown that placement errors of ten exceed specified tolerances. In no case were bars found to be missing but placement errors greater than 5 in. (12.5 cm) were encountered. Strength calculations based on actual locations of reinforcement showed individual reductions of strength greater than 15 percent and for all columns a mean reduction of nearly 5 percent for high effective eccentricities. Probability models to describe the distribution of reinforcing placement errors were derived to facilitate reliability analysis.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0889325X
• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Drysdale, R G
• Publication Date: 1975-1

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 9-15
• Serial:
  • American Concrete Institute, Journal of
  • Volume: 72
  • Issue Number: 1
  • Publisher: American Concrete Institute
  • ISSN: 0889-325X

Subject/Index Terms

• TRT Terms: Bars (Building materials); Columns; Distributions (Statistics); Eccentricity; Errors; Location; Material reinforcement; Reinforced concrete; Strength of materials
• Old TRIS Terms: Placement
• Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00083599
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 8 1975 12:00AM