TESTS OF LATERAL BRACING OF DECK GIRDER SPANS

Tests of lateral bracing of deck girder spans are reported, in an effort to secure data on the stresses in the angles of the bracing members under actual operating conditions. Strain gages are placed on the bracing members of a girder span having ballasted concrete floor and also on a girder span having an open timber floor. Results of tests on the two bridges indicate that a poured-in-place concrete floor increases the rigidity of the span against lateral forces. The stress on one corner of an angle connected by one leg may be two or three times the average stress in the angle. The lateral bracing angles are usually subjected to a complete reversal of stress. The sign of the stresses in the angles of the top laterals and end cross frames indicates that these stresses are the result of transverse forces acting in either direction on the girders. The stresses in the center cross frames appear to be the result of unequal deflection of the girders resulting from the rolling of the locomotive about a longtitudinal axis.

• Corporate Authors:

  American Railway Engineering Association

  59 East Van Buren Street
  Chicago, IL  United States  60605
• Publication Date: 1949

Media Info

• Features: Figures;
• Pagination: p. 134-141
• Serial:
  • AREA BULLETIN
  • Volume: 50
  • Publisher: American Railway Engineering Association

Subject/Index Terms

• TRT Terms: Bridge decks; Bridges; Girder bridges; Stresses
• Uncontrolled Terms: Bridge structures; Lateral dynamics
• Old TRIS Terms: Bridge stresses; Deck girder bridges
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00052456
• Record Type: Publication
• Source Agency: Association of American Railroads
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM