FIELD INVESTIGATION OF SOUTHERN PACIFIC COMPANY, TEXAS AND LOUISIANA LINES PRESTRESSED CONCRETE GIRDER SPANS

A description and analysis of tests made on two spans under diesel locomotives at speeds from 5 to 20 mph comprise this report. One span consisted of four pre-tensioned girders 30 ft. long. The other span consisted of five girders 55 ft. 0 in. long which were first pre-tensioned and later post-tensioned. The purpose of the tests was to determine static effects, vertical and transverse distribution of strains and maximum strains. A brief summary of the data follows: The effect of diesel locomotive loadings on two prestressed concrete girder spans was analyzed, and from the test data it can be concluded that: (1) recorded static strains were less than the calculated values; (2) composite action was attained between the deck and the girders; (3) Transverse distribution was the best for the longer span having the closer girder spacing; (4) there was little increase in strains with increase in speed; however, the diesels operated up to speeds of only 20 mph.

  • Supplemental Notes:
    • Conducted under sponsorship of AREA Committee 30 - Impact and Bridges Stresses.
  • Corporate Authors:

    Association of American Railroads Research Center

    3140 South Federal Street
    Chicago, IL  USA  60616
  • Authors:
    • Wilki, D W
  • Publication Date: 1962-10

Media Info

  • Features: Figures; Tables;
  • Pagination: 6 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00097258
  • Record Type: Publication
  • Source Agency: Association of American Railroads
  • Report/Paper Numbers: ER-25
  • Files: TRIS
  • Created Date: Jul 29 1975 12:00AM