CALIBRATION AND APPLICATION OF DETERIORATION MODELS FOR HIGHWAY BRIDGES

A correspondence between deterioration processes and the observed performance of bridges is established by creating new quantitative condition ratings. Condition ratings defined in terms of damage indexes are used to form Markov chain models that embody the performance of bridges in service. Markov chains in turn are used to generate mean transition times that can be used to compute parameters of deterioration process models. Variations in exposure of bridge beams and in regions of bridge beams are handled by a multiplicity of Markov chains. To calibrate multiple models, condition ratings must be tied to known locations in a bridge. For this purpose the practice of segment-based reporting is introduced. Quantitative condition ratings are linked to normalized remaining flexural and shear strengths of bridge beams. Normalized remaining strength, along with segment-based reporting, supports the estimation of live load rating of bridges. Four cases of an example steel beam bridge are considered under differing rates of corrosion and patterns of corrosion in cross sections. It is seen that the controlling segment for live load rating of a bridge may evolve under some corrosion environments and that estimated live load capacities based on quantitative condition ratings are reasonable approximations of the actual load ratings.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 220-230
  • Monograph Title: FOURTH INTERNATIONAL BRIDGE ENGINEERING CONFERENCE, SAN FRANCISCO, CALIFORNIA, AUGUST 28-30, 1995. CONFERENCE PROCEEDINGS, 2 VOLUMES
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00711691
  • Record Type: Publication
  • ISBN: 0309061091
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 5 1995 12:00AM