RELATIVE VERTICAL MOVEMENT AND ROCKING OF TIE PLATES ON THE TIES UNDER TRAFFIC

Study is made to determine the compression of the tie plate into the tie and the rocking action parallel with the rail of tie plates having a flat rail seat and a rolled circular crown. Rail and tie plate stress measurements are made. Test procedure is described and data discussed. It is noted that while the tie plate is loaded the amplitude of the rocking motion under the wheels of a truck is too small to cause first one sheared edge then the other to rise off the tie. Consistent patterns of tie plate rocking and vertical movement are obtained for two or more passenger cars in the same train and also for two or more runs at approximately the same speed. Results for a representative run for each of the six tie plate locations are reported. The higher values of the rocking angle and tie compression occur on tangent track with softwood ties and the highest train speed. Tie condition has more effect on the amount of rocking than does the shape of the rail seat of the tie plate. The small magnitude of the tie plate rocking for any tie plate or tie condition is of special significance.

• 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. 14-18
• Serial:
  • AREA BULLETIN
  • Volume: 50
  • Publisher: American Railway Engineering Association

Subject/Index Terms

• TRT Terms: Dynamics; Railroad rails; Rocking; Stresses; Tie plates
• Uncontrolled Terms: Vertical dynamics
• Old TRIS Terms: Rail stress; Rocking tests
• Subject Areas: Railroads;

Filing Info

• Accession Number: 00052453
• Record Type: Publication
• Source Agency: Association of American Railroads
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM