SLENDER CONCRETE COLUMNS SUBJECTED TO SUSTAINED AND SHORT-TERM ECCENTRIC LOADING

This paper presents a test series examining the structural behavior of six slender reinforced concrete columns subjected to short-term and sustained loading. The columns had 200-by-200 mm cross sections and were 4 m long. Concrete strengths used were 35 MPa and 92 MPa, with a load eccentricity of 20 mm. Key parameters such as concrete strength, concrete and steel strains, cracking, midheight deflection, and loading rate were studied. The high-strength concrete (HSC) columns subjected to short-term loading displayed less ductility and more sudden failures than the normal strength concrete columns. Furthermore, the tests conducted indicated that the structural behavior of the HSC is favorable under sustained loading. For example, the HSC column exhibited less tendency to creep and could sustain the axial load without much increase in deformation for a longer period of time. An analysis based on a simplified stability analysis, using a stress-strain relation for concrete that includes creep, aging, and the confining effect of the stirrups was carried out. The model was shown to simulate the load-deflection curves satisfactorily for all of the concrete columns.

• Record URL:
  http://www.concrete.org/Publications/InternationalConcreteAbstractsPortal.aspx.aspx?m=details&i=832
• 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:
  • Claeson, C
  • Gylltoft, K
• Publication Date: 2000-1

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 45-52
• Serial:
  • ACI Structural Journal
  • Volume: 97
  • Issue Number: 1
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-3241
  • Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP

Subject/Index Terms

• TRT Terms: Aging (Materials); Axial loads; Columns; Confining pressure; Cracking; Creep; Deflection; Deformation; Deformation curve; Ductility; Eccentricity; Failure; High strength concrete; Loads; Reinforced concrete; Stability analysis; Steel; Stirrups; Strain (Mechanics); Strength of materials; Tests
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00789050
• Record Type: Publication
• Contract Numbers: CMS-9640570
• Files: TRIS
• Created Date: Mar 28 2000 12:00AM