Table of Contents

• Abstract
• 1. Introduction
  • 1.1 Fatigue and Aging
    • 1.2.1 Preservative Treatments
  • 1.2 Background
  • 1.3 Shear Spiking
  • 1.4 Objective of the Study
• 2. Standard Timber Railroad Bridges
  • 2.1 Description of an Open-Deck Timber Trestle Bridge
  • 2.2 Description of a Ballast-Deck Timber Bridge
• 3. Background
  • 3.1 Background to the Research Study
  • 3.2 Shear Spiking
• 4. Experimental Test Setup and Procedure
  • 4.1 Description of Timber Stringers
  • 4.2 Loading Setup
  • 4.3 Material Properties
    • 4.3.1 Timber Stringers
    • 4.3.2 Shear Spikes
    • 4.3.3 Epoxy Resin Adhesive
  • 4.4 Damaging the Timber Stringers
  • 4.5 Shear-Spike Installation
  • 4.6 Durability (Cyclic) Loading
  • 4.7 Ramp Load Testing to Failure
• 5. Results
  • 5.1 Effectiveness of Shear Spike Repair
  • 5.2 Durability Loading
    • 5.2.1 Durability Loading to 25,000 Cycles at L/500
    • 5.2.2 Durability Loading to 10,000 Cycles at L/300
    • 5.2.3 Comparison of Durability Loading Configurations
    • 5.2.4 Dissection of Failed Specimens
  • 5.3 Ramp Load Testing to Failure
  • 5.4 Cost Analysis
• 6. Observations, Conclusions and Recommendations
  • 6.1 Conclusions
  • 6.2 Recommendations
• References