Skewed Steel Bridge Cross-frame Response to Truck Loading

Open Access
Author:
Murphy, Shane David
Graduate Program:
Civil Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
June 01, 2012
Committee Members:
  • Daniel G Linzell, Thesis Advisor
Keywords:
  • Steel Bridge
  • Skew
  • Cross-frame
  • Parapet
Abstract:
Cross-frame members in highly skewed steel bridges experience increased load levels compared to straight bridges. Research has confirmed this under both construction and live loading, but has primarily relied on finite element analysis for examining live loading effects. This thesis presents the findings of a field test that measured cross-frame forces in a highly skewed, steel, bridge under truck loading. Additionally, a computational study is presented that investigated the effect of skew and parapet stiffness on cross-frame forces. A finite element model was calibrated using field test results and multiple parapet scenarios were introduced into the model over a range of skew angles to do determine their effects on cross-frame axial force.