Safety Factor Increase to Fatigue Limit States through Shear Spiking for Timber Railroad Bridge Rehabilitation – Phase I

The overall project is to demonstrate the effectiveness of shear spiking (technique already developed through a previous project). Many timber railroad bridges are deficient but it is too costly to replace them; hence, inexpensive repair techniques are needed. The proposed project will provide the necessary documentation of the effectiveness of this newly developed mitigation technique under realistic loads using new equipment available from a National Science Foundation grant to Colorado State University. This will ultimately be accomplished through a series of spatio-temporal fatigue tests on stringers for both non-repaired and repaired. The timing and locations of the loading will be determined from influence line analysis of a typical freight train(s). The results will be used as leverage and/or proof-of-concept to approach the American Railway Association for additional funding. This report presents the intermediate results of the project, which is designated herein as Phase I. Phase I focused on development of the actuator control algorithm, which was successfully tested in the Colorado State University Structural Engineering Laboratory in the spatio-temporal test frame using seven actuators simultaneously in force control.

• Record URL:
  https://www.ugpti.org/resources/reports/details.php?id=779
• 
• Record URL:
  https://rosap.ntl.bts.gov/view/dot/28337
• Supplemental Notes:
  • This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
• Corporate Authors:

  Colorado State University, Fort Collins

  Fort Collins, CO  United States  80523

  Mountain-Plains Consortium

  North Dakota State University
  Fargo, ND  United States  58108

  Research and Innovative Technology Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Dao, Thang
  • van de Lindt, John W
• Publication Date: 2014-11

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures;
• Pagination: 18p

Subject/Index Terms

• TRT Terms: Algorithms; Fatigue tests; Railroad bridges; Rehabilitation; Safety factors; Spikes; Wooden bridges
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; I24: Design of Bridges and Retaining Walls; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 01546186
• Record Type: Publication
• Report/Paper Numbers: MPC 14-273
• Files: UTC, NTL, TRIS, RITA, ATRI, USDOT
• Created Date: Dec 2 2014 9:29AM