LIVE-LOAD STRESS MEASUREMENTS ON FORT LOUDON BRIDGE FINAL REPORT

EIGHT VEHICLES, RANGING FROM A TWO-AXLE 27,830-LB. TRUCK TO A FIVE-AXLE 150,000-LB. TANK TRANSPORTER WERE USED IN TESTING A LOW TRUSS BRIDGE OF 110 FT. 8 IN. SPAN AT FORT LOUDON, PENNSYLVANIA. DURING EACH PASSAGE OF A TEST VEHICLE OVER THE STRUCTURE, 24 SIMULTANEOUS STRAINS WERE RECORDED WITH ELECTROMAGNETIC GAGES. FIGURES ARE PRESENTED FOR TYPICAL TRUSS MEMBERS, SHOWING STATIC STRESSES, IMPACT STRESSES AND SECONDARY STRESSES. DATA ARE PRESENTED ON VERTICAL AND HORIZONTAL TRUSS DEFLECTIONS AND STRESSES IN THE FLOOR SYSTEM ARE DISCUSSED. VEHICLE SPEEDS VARIED FROM 5 TO 50 MPH. WHILE THESE DATA APPLY ONLY TO THE PARTICULAR BRIDGE TESTED, IT IS BELIEVED THAT THE RESULTS WILL HAVE SOME BEARING ON THE DESIGN OF HIGHWAY BRIDGES IN GENERAL. /AUTHOR/

• Record URL:
  https://onlinepubs.trb.org/Onlinepubs/hrbproceedings/31/31-003.pdf
• Supplemental Notes:
  • Vol 31, pp 36-61, FIGS, 2 TAB, PHOT. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Van Eenam, N
  • Kavanagh, T C
  • Ruble, E J
  • Goodman, L E
• Discussers:
  • Jones, J
• Publication Date: 1952

Media Info

• Media Type: Digital/other
• Monograph Title: Proceedings of the Thirty-First Annual Meeting of the Highway Research Board, Washington, D.C., January 15-18, 1952
• Serial:
  • Highway Research Board Proceedings
  • Volume: 31
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Axle load force; Bridge design; Bridges; Electromagnets; Live loads; Stresses; Structural design; Truss bridges
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00209457
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Aug 1 1971 12:00AM