BEHAVIOUR OF PRESTRESSED DOUBLE-WEB TEE BEAMS WITH REALISTIC ASSUMPTIONS CONCERNING MATERIAL PARAMETERS

TRAGVERHALTEN DES ZWEISTEGIGEN VORGESPANNTEN PLATTENBALKENS UNTER BERUECKSICHTIGUNG EINES WIRKLICHKEITSNAHEN WERKSTOFFVERHALTENS

The computation of the internal forces and moments and of the displacements of simply supported or continuous double-web tee beams of variable cross section subjected to arbitrary loads and assuming realistic stress-strain relationships is carried out with the aid of the reduction method. Two fundamentally different approaches are available. The material parameters are compatible and interchangeable. The results show that different main girder deflections should not be neglected in the case of eccentric imposed loading. The reduction of continuous beams to simply supported beams by means of an equivalent moment of inertia can lead to incorrect results for moments and shears in the deck slab region. Ultimate load calculations for the deck slab according to present standards leads to different results compared to those obtained when computing the ultimate load for the whole structure. The design of a system is logically consistent only on the basis of linear elastic analysis or using realistic stress-strain relationships. Elastic analysis using approximate reductions in stiffnesses does not give satisfactory results. Finally numerical examples are given to show the different effects of using global or partial safety factors. /TRRL/

  • Availability:
  • Corporate Authors:

    Bundesminister fuer Verkehr

    Kennedy Allee Number 72
    5300 Bonn,   Germany 

    Bundesminister fuer Verkehr

    ABT. Strassenbau, Lennestrasse 30
    D-5300 Bonn,   Germany 
  • Authors:
    • MEHLHORN, G
    • ERNST, M
  • Publication Date: 1976

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00195160
  • Record Type: Publication
  • Source Agency: Bundesanstalt für Straßenwesen (BASt)
  • Report/Paper Numbers: ANALYTIC
  • Files: ITRD, TRIS
  • Created Date: Aug 15 1979 12:00AM