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Predicting the usefulness of monitoring for identifying the behavior of structures

James Alexandre Goulet and Ian F. C. Smith

Article (2013)

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Abstract

Structures can be better understood through structural identification. This is where measurement data are used to improve modeling of structural behavior. During structural identification, uncertainties may limit the extent of such understanding. The objective of this paper is to determine probabilistically to what degree measurements are useful for structural identification. The procedure is intended to be used prior to monitoring. The new methodology evaluates the probability of occurrence of two performance indices; the expected number of candidate models and the expected prediction ranges. Since it does not require intervention on the structure, the method can be used to support prioritization of decisions related to full-scale testing. These features are illustrated through the study of the Langensand Bridge (Switzerland). In this example, the methodology shows that increases in modeling uncertainties hinders the usefulness of measurements for identifying model parameter values. The predictive capability of the method proposed is verified by agreement with observations made during a recent identification exercise. Quantifying the expected identifiability is able to support infrastructure decision-making such as determining whether or not certain types of structural monitoring are useful.

Uncontrolled Keywords

Expected identifiability, System identification, Bridge monitoring, Modelupdating, Residual minimization, Errors, Uncertainties, Correlation

Subjects: 1000 Civil engineering > 1000 Civil engineering
1000 Civil engineering > 1001 Construction engineering and management
Department: Department of Civil, Geological and Mining Engineering
Funders: Swiss National Science Foundation
Grant number: 200020-117670/1
PolyPublie URL: https://publications.polymtl.ca/2884/
Journal Title: Journal of Structural Engineering (vol. 139, no. 10)
Publisher: ASCE
DOI: 10.1061/(asce)st.1943-541x.0000577
Official URL: https://doi.org/10.1061/%28asce%29st.1943-541x.000...
Date Deposited: 02 Feb 2018 12:08
Last Modified: 05 Apr 2024 21:35
Cite in APA 7: Goulet, J. A., & Smith, I. F. C. (2013). Predicting the usefulness of monitoring for identifying the behavior of structures. Journal of Structural Engineering, 139(10), 1716-1727. https://doi.org/10.1061/%28asce%29st.1943-541x.0000577

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