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Fatigue Analysis for Bridge-deck Sections under Blocked Cycles of Traffic Loading

Chan, Tommy H.T., Li, Z.X. , & Ko, Jan Ming (2000) Fatigue Analysis for Bridge-deck Sections under Blocked Cycles of Traffic Loading. In Ajtab, A.E. & Gosselin, S.R. (Eds.) Nondestructive Evaluation of Highways, Utilities, and Pipelines, 7-9 Mar, Newport Beach.

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Abstract

An effective approach for fatigue analysis of bridge-deck sections under traffic loading is proposed. It allows fatigue damage and predicted life of bridge deck under variable amplitude stress history due to traffic to be evaluated on the basis of health monitoring data. Based on the measurement of bridge traffic and the analysis on the property of strain-time histories recorded by strain gauges set at a bridge-deck section, the variable-amplitude strain-time history can be modeled as block repeated cycles. A representative block used as a standard of the blocks of repeated strain history is defined and obtained from the statistical analysis of many samples of daily strain-time data measured by the health monitoring system. Fatigue damage rate generated by a representative block of cycles is then derived, and computational approach for fatigue analysis based on the damage model and Miner’s law is developed, in which the updating of the representative block is included for considering the increase of traffic volume in the future. Finally, as an example to show how the approach proposed in this paper is applied to evaluate the fatigue damage of a long-span suspension bridge, some results calculated for the critical location in the deck section are given.

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ID Code: 12868
Item Type: Conference Paper
Additional Information: For more information, please refer to the publisher's website (see hypertext link) or contact the author.
Keywords: Fatigue damage, life prediction, steel bridge, deck section, traffic loading, the representative block, strain, time history
DOI: 10.1117/12.387827
ISBN: 0819436135
ISSN: 0277-786x
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Mechanical Engineering not elsewhere classified (091399)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2000 International Society for Optical Engineering (SPIE)
Deposited On: 04 Mar 2008
Last Modified: 11 Aug 2011 01:36

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