University of Illinois Urbana-Champaign

Evaluation of Illinois Bridge Deterioration Models

Fu, Gongkang

Content Files
FHWA-ICT-21-024.pdf

Permalink

https://hdl.handle.net/2142/110385

Description

Title
Evaluation of Illinois Bridge Deterioration Models
Author(s)
Fu, Gongkang
Issue Date
2021-09
Keyword(s)
  • Bridge
  • NBI Condition Rating
  • Condition Rating History
  • Transition Time
  • Weibull Distribution
  • Deterioration Curve
  • Condition Rating Forecast
Date of Ingest
2021-09-09T16:26:36Z
Abstract
The National Bridge Inventory bridge inspection system ranks the condition of bridge components on a scale of zero to nine. The resulting condition ratings represent an important element considered in deciding measures for bridge maintenance, repair, and rehabilitation. Thus, forecasting future condition ratings well is critical to reliable planning for these activities and estimating the costs. The Illinois Department of Transportation currently has deterministic models for this purpose. This study’s objective is to review the current models using condition rating histories gathered from 1980 to 2020 in Illinois for the following bridge components: deck, superstructure, substructure, culvert, and deck beam. The results show the current Illinois Department of Transportation models are inadequate in forecasting condition ratings, producing overestimates of the transition times between two condition rating levels for these components / systems, except for the deck beam, which is underestimated. It is recommended that the mean transition times found in this study from condition rating histories are used to replace the current models as a short-term solution. Further research is recommended to develop probabilistic models as a long-term solution to address observed significant variation or uncertainty in condition rating and transition times between condition rating levels.
Publisher
Illinois Center for Transportation/Illinois Department of Transportation
Series/Report Name or Number
FHWA-ICT-21-024
ISSN
0197-9191
Type of Resource
text
Genre of Resource
technical report
Language
en
Permalink
http://hdl.handle.net/2142/110385
DOI
https://doi.org/10.36501/0197-9191/21-029
Sponsor(s)/Grant Number(s)
IDOT-ICT-SP46
Copyright and License Information
No restrictions. This document is available through the National Technical Information Service, Springfield, VA 22161.

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Research and Publications - Illinois Center for Transportation PRIMARY