FIELD INVESTIGATION OF LONGITUDINAL FORCES IN A CONCRETE TRESTLE ON THE SANTA FE RAILWAY

Description and analysis of test data obtained on a 660-ft long concrete trestle on the Atchinson, Topeka & Santa Fe Railway near Dallas, Texas, designated as Bridge No. 50.9, is presented. Purpose of the investigation is to determine the effect on the trestle of braking and traction as developed by a 278-ft long test train. Direct and bending stresses are obtained in the bents and axial stresses obtained in the rails at each abutment. Runs are made with both tight and loosened rail joints. Normal-speed runs are also made to determine stresses in the box beams and columns. It is noted that braking to a stop on the bridge produces considerable higher stresses in the columns and in the rails than starting on the bridge and accelerating off. Braking across the bridge and stopping beyond it produces negligible bending stresses in the columns, no higher than those resulting from eccentricity of the vertical loads.

• Corporate Authors:

  American Railway Engineering Association

  59 East Van Buren Street
  Chicago, IL  United States  60605
• Authors:
  • Ekrem, N E
• Publication Date: 1966-10

Media Info

• Features: Figures; Photos; Tables;
• Pagination: p. 37-102
• Serial:
  • AREA BULLETIN
  • Volume: 68 N
  • Issue Number: 601
  • Publisher: American Railway Engineering Association

Subject/Index Terms

• TRT Terms: Brakes; Bridges; Concrete bridges; Stresses; Tests; Traction; Train track dynamics; Vehicle tests
• Old TRIS Terms: Brake tests; Bridge stresses; Traction tests
• Subject Areas: Bridges and other structures; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00052276
• Record Type: Publication
• Source Agency: Association of American Railroads
• Report/Paper Numbers: ER-67 Proceeding
• Files: TRIS
• Created Date: Jul 15 1974 12:00AM