INFLUENCE OF LOADING RATE AND RADIAL PRESSURE ON BOND IN REINFORCED CONCRETE. A NUMERICAL AND EXPERIMENTAL APPROACH

One of the fundamental principles of the composite material reinforced concrete is the bond of the reinforcing steel to the concrete. It determines the cracking behaviour of reinforced concrete, the deflection behaviour in the cracked stage, and the anchorage of the reinforcing steel. Much research has been carried out on the bond properties, especially under static loading conditions. In regard to the bond behaviour under impact loading conditions, however, little is known. Attempts have been made to establish theoretical models. Still no model is available that can explain qualitatively and quantitatively by means of the relevant bond mechanisms and phenomena the influence of the numerous parameters influencing bond. This research comprises an experimental and a numerical part. The main topic of the experimental part was to study the influence of the loading rate on the bond resistance of deformed bars, plain bars and prestressing strands for different concrete compressive strengths. In the numerical part, a mathematical tool was developed, which made it possible to study the bond behaviour of deformed bars in a fundamental way, in terms of only the behaviour of the surrounding concrete and the bar geometry. In conclusion it can be stated that the developed slip layer approach, which has proved to be successful in explaining the influence on bond of concrete quality, loading rate and external radial pressure, will be a valuable tool in future. It offers the possibility of studying the influence on bond of deformed bars of, for example, creep, temperature or bar geometry by only changing the input parameters of the material properties or the geometry. (TRRL)

  • Corporate Authors:

    Delft University Press

    11 Mijnbouwplein
    Delft,   Netherlands 
  • Authors:
    • Vos, E
  • Publication Date: 1983-10

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: 235 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00394258
  • Record Type: Publication
  • Source Agency: Institute for Road Safety Research, SWOV
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS
  • Created Date: Jul 31 1985 12:00AM