RIGID FRAME ANALYSIS FOR MEMBERS OF VARIABLE MOMENT OF INERTIA, DIRECTED ESPECIALLY TOWARDS FLOORBEAM HANGER FRAMES AND COUNTERWEIGHT TRUSSES-ANALYTICAL AND EXPERIMENTAL STUDIES

This five part report presented a general method of analysis of rigid frames composed of members having a variable section. The method was directed towards frames composed of floorbeams and their hangers, and towards the counterweight trusses of bascule bridges, but this could be applied to any type of rigid frame or truss. Results of laboratory studies on bridge frame models and of field studies on the counterweight trusses of heel-trunnion bascule bridges were presented. A comprehensive study of binding stresses of laboratory models and analytical treatment were reported. Floorbeam hanger bending depends upon rigid frame action between floorbeam and hangers, and additional rotation of the lower end of the hanger due to shear deformation in the hanger web opposite the floorbeam connection. An analytical study of heel-trunnion-type bascule bridges indicates that the only member subjected to high stresses is the member between the concrete counterweight and the counterweight trunnion pin. The results of the tests indicate that the stress in this member is appreciably greater than that indicated by the commonly accepted methods of analysis.

• Corporate Authors:

  American Railway Engineering Association

  59 East Van Buren Street
  Chicago, IL  United States  60605
• Publication Date: 1953

Media Info

• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: p. 1-73
• Serial:
  • AREA BULLETIN
  • Volume: 54
  • Publisher: American Railway Engineering Association

Subject/Index Terms

• TRT Terms: Analysis; Bridges; Stresses; Trusses
• Uncontrolled Terms: Bridge structures
• Old TRIS Terms: Analytical techniques; Bridge stresses; Floorbeam hangers
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00052420
• Record Type: Publication
• Source Agency: Association of American Railroads
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM