FAILURE MECHANISM AND STRESS-STRAIN IDEALIZATION OF CONFINED HIGH STRENGTH CONCRETE

Twenty four concrete cylinders laterally reinforced with spirals or circular hoops were tested under monotonic concentric compression. Three failure modes were observed, which are dependent on the ratio of normal to shear stress at the potential inclined shear sliding failure plane. A set of constitutive laws for concrete subjected to triaxial compression passively provided by the lateral steel at discrete locations is derived. Furthermore, an analytical model for confinement mechanism, along with a method to predict the potential of the lateral confining stress that can be provided by the transverse steel system is developed. By enforcing compatibility in the lateral deformation between concrete and the transverse steel system, the attainable confining stress at peak axial strength is determined. Knowing the attainable confining stress at peak, the axial stress-strain curve of confined concrete can be generated. The results from the model agree well with the test results of this research and the test results of twenty square columns tested by other researchers.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784404194
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Watanabe, F
  • Assa, B
  • Nishiyama, M
  • Takamori, N
  • Ratulangi, S
• Conference:
  • First Engineering Foundation Conference on High Strength Concrete
  • Location: Kona, Hawaii
  • Date: 1997-7-13 to 1997-7-18
• Publication Date: 1999

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 215-228

Subject/Index Terms

• TRT Terms: Columns; Compression; Confining pressure; Cylinders (Geometry); Deformation; Failure analysis; High strength concrete; Shear stress; Steel; Strain (Mechanics); Stresses; Transverse reinforcement
• Uncontrolled Terms: Concentric compression; Confining stress; Lateral deformation; Lateral reinforcement; Stress-strain curve
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 00778454
• Record Type: Publication
• ISBN: 0784404194
• Files: TRIS
• Created Date: Nov 24 1999 12:00AM