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:
  • Record URL:
  • 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


  • English

Media Info

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

Subject/Index Terms

Filing Info

  • Accession Number: 01546186
  • Record Type: Publication
  • Report/Paper Numbers: MPC 14-273
  • Created Date: Dec 2 2014 9:29AM