Probabilistic Fatigue Analysis of Improved Tubular Bridge Joints Considering Multiple Crack Initiation Sites

  • Scott Walbridge
  • Alain Nussbaumer
Conference paper


This paper summarizes a series of probabilistic linear elastic fracture mechanics (LEFM) calculations conducted to study the effectiveness of weld improvement methods in prolonging the fatigue life of tubular bridge joints. A simple model is proposed which considers the effect of weld improvement, as well as the presence of multiple potential crack initiation sites, in a probabilistic manner. An example is presented to show how the model can be used to evaluate the effectiveness of three different improvement strategies.


Residual Stress Stress Intensity Factor Stress Intensity Factor Compressive Residual Stress Linear Elastic Fracture Mechanic 
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Copyright information

© Springer-Verlag London 2004

Authors and Affiliations

  • Scott Walbridge
    • 1
  • Alain Nussbaumer
    • 1
  1. 1.ICOM — Steel Structures LaboratoryLausanneSwitzerland

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