Accurate and Rapid Determination of Fatigue Damage in Bridge Superstructures

Details

• Creators:
  Hahin, Christopher ; South, Jeffrey M,
• Corporate Contributors:
  Illinois. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Bridge superstructures
  • Traffic loads
  • Vehicle weight
  • Tests
  • Fatigue (Mechanics)
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Department of Transportation. Federal Highway Administration
• Abstract:
  Fifteen representative steel bridges throughout the State of Illinois were instrumented with foil strain gages to determine their frequencies of loading and the magnitudes of stresses induced by traffic over a 3 to 8-hour period, depending on traffic volume. Reinforced prestressed or post-tensioned concrete bridges were not included in this study. Fatigue prone details, such as cover plated wide flanges, were instrumented. For each stress range increment gathered by the data acquisition system, the cumulative damage sustained over an extended number of years was compared with the number of available fatigue cycles for that stress range using published S-N data for various details and the Palmgren Miner linear damage rule. A new equation for factor of safety for structural details subject to fatigue is described, taking dead load, live load, and bridge detail fatigue strengths into account.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/13399/dot_13399_DS1.pdf
• File Type:
  [PDF - 2.90 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:f3a13e07144f2a1fc54f57dcf44dd8b871bbbf9e5f28e42e386d20a368b6f846d1bdc8879806f9198d0d991ae0bdd7fa7c51a707557844940c5b3a0d8ba3c091