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Improving fatigue evaluations of structures using in-service behavior measurement data

Romain Pasquier, James Goulet, Claire Acevedo, Ian F. C. Smith

Article (2014)

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Abstract

Conservative models and code practices are usually employed for fatigue-damage predictions of existing structures. Direct inservicebehavior measurements are able to provide more accurate estimations of remaining-fatigue-life predictions. However, these estimationsare often accurate only for measured locations and measured load conditions. Behavior models are necessary for exploiting information givenby measurements and predicting the fatigue damage at all critical locations and for other load cases. Model-prediction accuracy can be improvedusing system identification techniques where the properties of structures are inferred using behavior measurements. Building upon recent developmentsin system identification where both model and measurement uncertainties are considered, this paper presents a new data-interpretationframework for reducing uncertainties related to prediction of fatigue life. An initial experimental investigation confirms that, compared withtraditional engineering approaches, the methodology provides a safe and more realistic estimation of the fatigue reserve capacity. A secondapplication on a full-scale bridge also confirms that using load-test data reduces the uncertainty related to remaining-fatigue-life predictions.

Uncontrolled Keywords

Remaining fatigue life; Model-based data interpretation; Population of models; Uncertainty; Conservatism

Subjects: 1000 Civil engineering > 1000 Civil engineering
Department: Department of Civil, Geological and Mining Engineering
Funders: Swiss National Science Foundation
Grant number: 200020-144304
PolyPublie URL: https://publications.polymtl.ca/2893/
Journal Title: Journal of Bridge Engineering (vol. 19, no. 11)
Publisher: ASCE
DOI: 10.1061/(asce)be.1943-5592.0000619
Official URL: https://doi.org/10.1061/(asce)be.1943-5592.0000619
Date Deposited: 17 Jan 2018 12:30
Last Modified: 22 Nov 2022 09:25
Cite in APA 7: Pasquier, R., Goulet, J., Acevedo, C., & Smith, I. F. C. (2014). Improving fatigue evaluations of structures using in-service behavior measurement data. Journal of Bridge Engineering, 19(11), 1-10. https://doi.org/10.1061/(asce)be.1943-5592.0000619

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