CONTRIBUTION TO THE STUDY OF TWO-GIRDER BRIDGES WITH AND WITHOUT SUPPORTED CROSS-BAR

CONTRIBUTION A L'ETUDE DES PONTS A DEUX POUTRES AVEC ET SANS ENTRETOISES SUR APPUIS

A comparison is presented of the behaviour of a two-girder bridge with independent span without crossbar with that of an identical bridge with supported cross bar. A method of calculation was developed which takes into account the influence of the transverse flexibility of the floor slab, the longitudinal shear stresses, conditions of the support, and the presence of butt-end crossbars. This method seems to be the only one applicable to a girder of variable cross section. It can be used to calculate a slab containing any number of continuous girders resting on skew supports, but only in the case of supports preventing the transverse rotation of the girders. Experimental tests were carried out to investigate the longitudinal deflection. A good agreement was obtained between experimental and theoretical results. The effect of the suppression of butt-end cross-bar becomes more marked near the extremities of the girder. The slab is subjected, in the vicinity of the supports, to important transverse bending stresses which it can withstand as long as the transverse reinforcement is sufficient. The stresses in the slab depend for the greatest part on the support present, which relieves the slab especially as regards eccentric loads. /TRRL/

• Corporate Authors:

  Central Laboratory of Bridges & Highways, France

  75732 Paris,   France 
• Authors:
  • Abdunnur, K
• Publication Date: 1974-4-12

Language

• French

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 266 p.

Subject/Index Terms

• TRT Terms: Beams; Bridges; Calculation; Deflection; Girder bridges; Grates; Loads; Prestressed concrete; Shear strength; Shear stress; Slabs; Structural supports; Tests; Theses
• Old TRIS Terms: Cross bars; Supports
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00149906
• Record Type: Publication
• Source Agency: Central Laboratory of Bridges & Highways, France
• Report/Paper Numbers: Thesis
• Files: ITRD, TRIS
• Created Date: Jun 17 1977 12:00AM