STRESS DISTRIBUTION IN BRIDGE FRAMES - FLOORBEAM HANGERS

Report is made on stress distribution in bridge frames and floorbeam hangers. A survey of floorbeam hanger failures is conducted, and field and laboratory studies of stress analysis are made. It is preliminarily concluded that the increase in stress concentration at the sides of the rivet holes due to rivet bearing is often quite large and may easily be the major factor in the fatigue failures at the gussets. Fatigue tests of plates connected by rivets to gussets on one side only produce progressive fracture through the plate at the rivet holes at relatively low unit stresses. Loss of clamping force in the rivets reduces the fatigue strength of such riveted joints. Due to the extensive hanger failures on some railroads, it is recommended that railroads keep close inspection of floorbeam hangers.

• 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. 443-445
• Serial:
  • AREA BULLETIN
  • Volume: 50
  • Publisher: American Railway Engineering Association

Subject/Index Terms

• TRT Terms: Bridge design; Bridges; Joints; Rivets; Stresses; Structural design
• Uncontrolled Terms: Fatigue analysis
• Old TRIS Terms: Bridge stresses; Floorbeam hangers; Riveted joints
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00052458
• Record Type: Publication
• Source Agency: Association of American Railroads
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Jul 15 1976 12:00AM