Shear-torsion interaction tests on single hollow core slabs

Matti Pajari

Research output: Book/ReportReportProfessional

Abstract

To clarify the interaction of shear and torsion in prestressed hollow core slabs, 15 load tests on single prestressed hollow core units were carried out. The slabs were 1.2 m in width, 7 m in length and either 200 or 400 mm in depth. The ends of the slabs were simply supported. In 13 tests the loads comprised one or two point loads close to support. In two tests there was a uniform transverse line load close to one support while the slab unit was twisted by eccentric loads at the ends. In ten tests the slabs were placed on neoprene strips with no end grouting. In these tests the transverse bending made the slab fail longitudinally first, which in most cases resulted in a lower resistance than that predicted using traditional design methods. In five tests the conditions were more realistic, i.e. the slab ends were grouted and stiffened by supporting beams or spreader beams above the slab ends. In these tests the observed resistances were of the same order or higher than those predicted using the conventional calculation methods. However, some observed stiffnesses and resistances deviated so much from the predicted results that the conventional calculation methods have to be evaluated by comparison with numerical methods.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages204
ISBN (Electronic)951-38-6519-3
Publication statusPublished - 2004
MoE publication typeNot Eligible

Publication series

NameVTT Tiedotteita - Research Notes
PublisherVTT
No.2275
ISSN (Print)1235-0605
ISSN (Electronic)1455-0865

Fingerprint

Torsional stress
Spreaders
Grouting
Loads (forces)
Numerical methods
Stiffness

Keywords

  • shear tests
  • torsion tests
  • hollow core slabs
  • testing
  • test specimens
  • load testing
  • failure loads
  • concrete
  • precast
  • prestressed
  • structure

Cite this

Pajari, M. (2004). Shear-torsion interaction tests on single hollow core slabs. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 2275
Pajari, Matti. / Shear-torsion interaction tests on single hollow core slabs. Espoo : VTT Technical Research Centre of Finland, 2004. 204 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2275).
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Pajari, M 2004, Shear-torsion interaction tests on single hollow core slabs. VTT Tiedotteita - Meddelanden - Research Notes, no. 2275, VTT Technical Research Centre of Finland, Espoo.

Shear-torsion interaction tests on single hollow core slabs. / Pajari, Matti.

Espoo : VTT Technical Research Centre of Finland, 2004. 204 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2275).

Research output: Book/ReportReportProfessional

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Pajari M. Shear-torsion interaction tests on single hollow core slabs. Espoo: VTT Technical Research Centre of Finland, 2004. 204 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2275).