REINFORCED CONCRETE ON CONSTITUTIVE RELATIONS

A mathematical model of reinforced concrete is derived from stress/strain relations of reinforcing steel and plain concrete, and from considering slip in bond between them. The stress/strain relations are nonlinear due to inelasticity of the concrete and steel and to cracking. They are presented in the form of a variable modulus model for use in a finite-element code. The stress/strain relations for plain concrete are based on experimental data obtained under uniaxial, biaxial and triaxial states of stress. Additional laboratory experiments were performed under this contract to investigate the bond-slip relation in tension and in compression. Unitil cracking occurs, properties of the model depend on the entire stiffness of steel and concrete. After cracking, a composite modulus is used which reflects the combined stiffness of steel and concrete and takes into account the extent to which bond between steel and concrete is broken. This model is incorporated in a dynamic inelastic finite-element code and is used to analyze reinforced concrete members such as beams subjected to static and dynamic loading.

• Corporate Authors:

  Agbabian Associates

  250 North Nash Street
  El Segundo, CA  United States  90245

  Air Force Weapons Laboratory

  Air Force Systems Command
  Kirtland AFB, NM  United States  87117

  Defense Nuclear Agency

  6801 Telegraph Road
  Alexandria, VA  United States  22310
• Authors:
  • Adham, S
  • Bhaumik, A
  • Tsenberg, J
• Publication Date: 1975-2

Media Info

• Pagination: 358 p.

Subject/Index Terms

• TRT Terms: Beams; Bonding; Compressive strength; Computer programs; Cracking; Deformation curve; Finite element method; Inelastic stress; Laboratory tests; Mathematical models; Nonlinear systems; Reinforced concrete; Reinforcing steel; Slip (Fluid mechanics); Stiffness; Tensile properties
• Uncontrolled Terms: Compressive properties; Crack propagation; Inelastic action; Nonlinearity; Slips
• Old TRIS Terms: Beams (Structural)
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00090695
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Final Rpt.
• Contract Numbers: F29601-73-C-0070
• Files: TRIS
• Created Date: Jun 26 1975 12:00AM