Analytical Performance of Reinforced Concrete Columns using Various Confinement Models

Accuracy of various stress-strain relationship models for concrete confined by lateral steel reinforcement in prediction of the moment-curvature response of a section under various loading patterns was investigated. Fiber model was implemented in a computer program developed for flexural analysis of reinforced concrete columns. Both monotonic and hysteretic analysis were performed. Each confined concrete model was used in the analysis for several loading cases on a circular, and a loading case on a rectangular section, keeping all other parameters fixed. Results were compared to each other and also validated against experimental data from six large-scale reinforced concrete circular columns and a rectangular section tested under the analyzed loading cases. In general, analysis underestimated the moment and overestimated the curvature capacities under a high level of axial load regardless of the model used, and there was a better agreement between analysis and test for low level or no axial load. Results from various models were close to each other, though different from test results, for cases with a constant or proportionally variable axial load. For a monotonic curvature with non-proportionally variable axial load, predictions by some recent models had a better agreement with experimental data. Evidently the level of axial load, and in turn the depth of compression zone, is related to the degree of confinement-utilization, and affects the confined concrete behavior. This is rarely addressed by the models.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0870312189
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Esmaeily, Asad
  • Lucio, Karen
• Conference:
  • International Symposium on Confined Concrete
  • Location: Changsha , China
  • Date: 2004-6-0 to 2004-6-0
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 95-110
• Monograph Title: International Symposium on Confined Concrete, Changsha, China, June 2004

Subject/Index Terms

• TRT Terms: Axial loads; Columns; Computer programs; Confined concrete; Deformation curve; Flexural strength; Hysteresis; Reinforced concrete; Reinforcing steel
• Uncontrolled Terms: Circular columns; Confinement modeling; Fiber models; Lateral reinforcement; Material models; Moment-curvature response; Monotonic analysis; Rectangular columns
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 01041391
• Record Type: Publication
• ISBN: 0870312189
• Report/Paper Numbers: SP-238--6
• Files: TRIS
• Created Date: Jan 30 2007 1:29PM