ENGINEERING STRUCTURES: (2) PRESTRESSED CONCRETE STRUCTURES. INFLUENCE OF CROSS-BEAMS ON THE BEHAVIOUR OF A TWO-GIRDER BRIDGE

LES OUVRAGES D'ART: 2) OUVRAGES EN BETON PRECONTRAINT - INFLUENCE DES ENTRETOISES SUR LE COMPORTEMENT D'UN PONT A DEUX POUTRES

This study compares the theoretical and experimental behaviour of a bridge without cross-beams to that of the same bridge with cross-beams at the supports. The case of a two-girder bridge with independent span was selected. An analytical method based on the theory of energy, called the method of cuts, was developed. Compared to conventional methods, it facilitates the determination of six statically indeterminate unknown factors (instead of two); it takes into account different support conditions and is applicable to bridges with variable transverse section. Detailed tests were carried out on prestressed micro-concrete models and on flexiglass models. A very good agreement was observed between theory and practice. In the absence of cross-beams the slab in the vicinity of the supports is subjected to large transverse flexural stresses which it can withstand; but torsion in the girders is reduced. The elimination of all cross-beams can be envisaged provided that increased transverse prestressing is available in the vicinity of the supports. On the other hand it is possible to reduce the torsional reinforcement in the girders. (TRRL)

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • ABDUNUR, C
• Publication Date: 1978-5-6

Language

• French

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 33-50
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 95
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Analysis; Beams; Behavior; Bending stress; Bridge bearings; Bridge construction; Bridge decks; Bridge foundations; Bridges; Calculation; Construction; Deflection; Flexure; Girder bridges; Mathematical models; Methodology; Prestressed concrete; Slabs; Statically indeterminate frames; Structural analysis; Structures; Tensioning; Tests; Torsion
• Uncontrolled Terms: Models; Transverse
• Old TRIS Terms: Analytical method; Cross beams; Transverse tensioning
• ITRD Terms: 3472: Beam; 3415: Bearing (bridge); 9001: Behaviour; 3455: Bridge; 6464: Calculation; 5586: Deflection; 9102: Method; 6205: Model (not math); 4796: Prestressed concrete; 3491: Slab; 5516: Statically indeterminate; 6255: Test; 5512: Torsion; 9081: Transverse
• Subject Areas: Bridges and other structures; Construction; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00315256
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: ITRD, TRIS
• Created Date: Jun 12 1981 12:00AM