An Approach to Estimate the Remaining Fatigue Life in Steel Girder Bridges based on Short-Term Field Measurements

Estimation of remaining fatigue life of an existing bridge involves the evaluation of fatigue resistance (capacity) and live load spectra (demand). Fatigue resistance depends on stress range, type of detail, degree of corrosion and other deterioration. Load analysis requires the knowledge of load history (accumulated damage), current load spectra and prediction of future loads. The objective of the paper is to present an approach to predict long term fatigue damage based on short periods of field measurement. Simple linear rescaling offers limited capabilities beyond repeating measured stresses. Miner’s Linear Damage rule is employed to estimate the accumulated damage. The procedures described could be extended to simulate bridge live loads using site-specific weigh-in-motion (WIM) data applied to structural models. Results are presented for the Doremus Avenue Bridge in terms of measured and simulated rainflow histograms.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Tables;
  • Pagination: 30p
  • Monograph Title: First International Conference on Fatigue and Fracture in the Infrastructure: Bridges and Structures of the 21st Century

Subject/Index Terms

Filing Info

  • Accession Number: 01091717
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 10 2008 4:18PM