Modelling SFRC with a Stress-Strain Approach

Steel Fiber Reinforced Concrete (SFRC) is a tension softening material. This means that once a single crack has been formed the residual post-cracking tensile strength in that section is lower than the initial tensile strength. When increasing the deformation, the crack will open and the post-cracking tensile stress, carried by the crack-bridging fibers, will decrease. For this type of material a stress-crack width relation can easily describe the basic constitutive material behavior. However, since most design engineers are more confident with a stress-strain relation, it is investigated whether a stress-strain relation is able to accurately predict the structural behavior of SFRC. In this paper a proposal is made to derive a stress-strain relation from the results of a RILEM 3-point bending test. The proposal is based on the assumption that the influence of the crack stretches in both directions over a length equal to the height of the tensile zone. The length of this influence zone is called characteristic length. Dividing the crack width by the characteristic length results in a “virtual” tensile strain. The newly proposed stress-strain relation is used to predict the load-deflection behavior of 28 full-scale beams. The results indicate a good prediction of the structural behavior.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727732471
• Corporate Authors:

  Thomas Telford Limited

  London,   United Kingdom 
• Authors:
  • Dupont, D
  • Vandewalle, L
• Conference:
  • Proceeding of the International Symposium Dedicated to Professor Surendra Shah, Northwestern University, USA
  • Location: Dundee Scotland, United Kingdom
  • Date: 2003-9-3 to 2003-9-4
• Publication Date: 2003

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 103-112
• Monograph Title: Role of Concrete in Sustainable Development

Subject/Index Terms

• TRT Terms: Beams; Behavior; Bending; Cracking of concrete pavements; Fiber reinforced concrete; Reinforced concrete; Steel fibers; Strain (Mechanics); Stresses; Tensile strength
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01010832
• Record Type: Publication
• ISBN: 0727732471
• Files: TRIS
• Created Date: Nov 28 2005 11:35AM