Fatigue criteria for integrity assessment of long-span steel bridge with health monitoring
Li, Z.X. & Chan, Tommy H.T. (2006) Fatigue criteria for integrity assessment of long-span steel bridge with health monitoring. Theoretical and Applied Fracture Mechanics, 46(2), pp. 114-127.
A structural health assessment (SHA) methodology is developed using data acquired from structural health monitoring (SHM) system installed on long-span bridges. A set of fatigue criteria has been proposed for pre-determining the global state of the bridge structure failure due to fatigue. This involves finding the threshold of fatigue initiation, below which the rate of fatigue damage may be undetectable under current technology or it is economically unfeasible. The state-of-art for large structures corresponds to the initiation of macro-cracks caused by the accumulation of damage generated by actual service loads for the case of bridges. In what follows, consideration is given to developing fatigue crack growth criterion based on the concept of the continuum damage mechanics (CDM). Fatigue accumulative is included in the model where a fatigue limit for multi-axial stress state is considered. The proposed criterion advocates the evolution of micro-crack growth up to the stage of macro-crack formulation. Considered are the loading histories that correspond to normal traffic loading for highways and railways, incidental or accident loadings such as those caused by typhoons and effective environmental loadings. The potential sites of damage are determined are discussed. The proposed criterion is applied to analyze the fatigue damage of the Tsing Ma Bridge with online strain history data acquired by the SHM system that is permanently installed in the bridge.
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|Item Type:||Journal Article|
|Additional Information:||For more information, please refer to the journal's website (see hypertext link) or contact the author.|
|Keywords:||structural health monitoring, fatigue criterion, state assessment, long, span steel bridge, PRINCIPAL STRESS DIRECTIONS, ISOENERGY DENSITY THEORY, WEIGHT FUNCTION, METHOD, HIGH, CYCLE FATIGUE, MULTIAXIAL FATIGUE, PART II, METALS, POLYCRYSTALS, DAMAGE|
|Subjects:||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 2006 Elsevier|
|Deposited On:||28 Feb 2008|
|Last Modified:||29 Feb 2012 13:53|
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