High strength fibre reinforced concrete: static and fatigue behaviour in bending

Recently, a number of high strength and ultra high strength steel fibre concretes have been developed. Since these materials seem very suitable for structures that might be prone to fatigue failure, such as bridge decks, the understanding of the static and fatigue bending behaviour is vital. In order to evaluate the bending behaviour of high and ultra high strength concretes, an experimental and analytical approach was followed. A general conclusion derived from the fatigue tests of the mixtures in this study, is that the fatigue regulations, as used for normal strength concrete, remain suitable for a safe fatigue design with high and ultra high strength concretes. The experimental results were confirmed with an analytical model, the multi-layer model. Further, the same multi layer model was adapted and used for the fatigue behaviour. A suitable material input relation is proposed that contains a gradual stiffness and strength decrease with increasing number of load repetitions. With this approach, all three stages of the deformation evolution of a fatigue experiment can be modelled. The proposed model can be easily implemented into existing finite element codes, and can therefore be used for fatigue verifications of larger structural elements of various shapes.

  • Availability:
  • Supplemental Notes:
    • Doctoral thesis presented to Delft University of Technology.
  • Authors:
    • Lappa, E S
  • Publication Date: 2007-6

Language

  • English

Media Info

  • Pagination: 220p

Subject/Index Terms

Filing Info

  • Accession Number: 01387054
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 9789090219356
  • Files: ATRI
  • Created Date: Aug 22 2012 10:02PM