SEISMIC PERFORMANCE OF CIRCULAR COLUMNS WITH LOW LONGITUDINAL REINFORCEMENT RATIOS

Investigators tested two large-scale circular columns with low longitudinal reinforcement ratios under cyclic inelastic lateral displacements simulating seismic response. The first column had a longitudinal steel ratio of 0.5 percent--one-half that specified as a lower limit by American Concrete Institute (ACI) design rules--and was intended to investigate ductile flexural response of columns with low steel ratios. The second column, with 1.0 percent steel ratio, was intended to examine whether shear strength was influenced by steel ratio. Both columns performed well. The first column displayed stable flexural response at displacement ductilities up to or equal to 10 before failing in shear. The second column failed in shear at displacement ductilities up to or equal to 4, somewhat higher than the expected ductility level. Response of the two columns suggests that current lower design limits for steel ratio could be reduced without detrimental influence on flexural response, and that shear strength of columns does not seem to be influenced by longitudinal steel ratio.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846957
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Priestley, MJN
  • Benzoni, G
• Publication Date: 1996-7

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 474-485
• Serial:
  • ACI Structural Journal
  • Volume: 93
  • Issue Number: 4
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-3241
  • Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP

Subject/Index Terms

• TRT Terms: Bridges; Columns; Ductility; Earthquake resistant structures; Fracture mechanics; Longitudinal reinforcement; Ratios; Seismicity; Shear strength
• Uncontrolled Terms: Seismic response
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00726978
• Record Type: Publication
• Files: TRIS
• Created Date: Oct 26 1996 12:00AM