Generating Complete Historical Condition Ratings Using a New Set of Non-Bridge Factors for Queensland Bridges in the Backward Prediction Model (BPM)

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Title Generating Complete Historical Condition Ratings Using a New Set of Non-Bridge Factors for Queensland Bridges in the Backward Prediction Model (BPM)
Author Son, Jung Baeg; Lee, Jae-Ho; Guan, Hong; Blumenstein, Michael Myer; Loo, Yew-Chaye
Publication Title 7th Austroads Bridge Conference
Editor Austroads
Year Published 2009
Place of publication Auckland, New Zealand
Publisher Austroads
Abstract Historical condition ratings obtained from biennial bridge inspections are major resources in a Bridge Management System (BMS) to predict long-term bridge deteriorations. However, such data are very limited in all bridge agencies, making it difficult in obtaining reliable future structural performances. To alleviate this problem, the Backward Prediction Model (BPM) technique for generating the missing historical condition ratings has been developed, and its reliability has been verified using existing condition ratings from the Maryland Department of Transportation, USA. The function of the BPM is to establish the correlations between the known condition ratings and such non-bridge factors as climate and traffic volumes, which can then be used to obtain the bridge condition ratings of the missing years. Since a non-bridge factor can influence the variation of the bridge condition ratings, well-selected non-bridge factors are critical for the BPM to function effectively. In this paper, the composition of non-bridge factors in the existing BPM is refined by excluding insignificant factors while simultaneously adding important ones. This technique produced three groups of non-bridge factors, including 14 factors covering the effects of climate, pollution and heavy traffic volume. These new factors selected for the Queensland environment are found to be effective for the BPM to generate the complete historical condition rating datasets. This in turn improves the reliability in the prediction of future bridge performances.
Peer Reviewed No
Published Yes
Publisher URI http://www.austroads2009.co.nz/
Conference name 7th Austroads Bridge Conference
Location Auckland, New Zealand
Date From 2009-05-26
Date To 2009-05-29
URI http://hdl.handle.net/10072/31944
Date Accessioned 2010-03-01
Date Available 2010-10-20T07:00:51Z
Language en_AU
Research Centre Centre for Infrastructure Engineering and Management; Institute for Integrated and Intelligent Systems
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Infrastructure Engineering and Asset Management
Publication Type Conference Publications (Full Written Paper - Non-Refereed)
Publication Type Code e2

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