Long-term behaviour of composite slabs prestressed with unbonded tendons

Mikko Malaska, Matti Pajari

Research output: Book/ReportReport


Mechanical modelling of post-tensioned steel-concrete composite slabs with unbonded tendons is discussed. The model was added as an option to COMPCAL, a finite element program developed at Ecole polytechnique fédérale de Lausanne, Switzerland. The work focused on the long-term behaviour of composite slabs in the serviceability limit state. Therefore, special attention was paid to the effects of creep and shrinkage of the concrete, and to those of relaxation of the prestressing steel. As an example, an analysis for a two-span slab was carried out.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages40
ISBN (Print)951-38-4973-2
Publication statusPublished - 1996
MoE publication typeNot Eligible

Publication series

SeriesVTT Tiedotteita - Meddelanden - Research Notes


  • concrete construction
  • concrete slabs
  • slabs
  • steels
  • prestressing steels
  • steel construction
  • composite structures
  • finite element analysis
  • creep properties
  • shrinkage
  • relaxation (mechanics)
  • tendons
  • unbonded tendons
  • strains
  • stresses


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