Abstract
Structural identification has continued to develop into a versatile tool for developing high fidelity analytical models of large civil structures that accurately reflect the measured in-service response. The results of successful structural identification have been applied to validate the performance of innovative systems and improve assessments of response analysis for operational and extreme loads. Furthermore, the developing field of vibration-based damage detection has sought to employ structural identification for long-term performance monitoring and condition assessment of aged structures. Overwhelmingly, the finite element method has served as the analytical framework for such models. However, alternative physics engines, such as the Applied Element Method, offer distinct advantages over the finite element method both with respect to the computational considerations in the identification process and with respect to the use of the calibrated model for assessment of structural response to extreme loads. A general framework for structural identification with applied elements is discussed, and advantages are contrasted with traditional finite element approaches. A case study application, a prestressed concrete double-tee joist roof tested in a full-scale building, is presented to demonstrate the approach and emphasize these advantages.
Keywords
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- f a :
-
Column vector of analytical natural frequency estimates
- f e :
-
Column vector of experimental natural frequency estimates
- ψ a :
-
Matrix of analytical mode shape estimates
- ψ e :
-
Matrix of experimental mode shape estimates
- W f :
-
Weighting matrix for eigenvalue residuals
- W ψ :
-
Weighting matrix for mode shape residuals
- MAC:
-
Modal Assurance Criterion
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Acknowledgements
The authors would like to acknowledge the support of Applied Science International, LLC, in providing licensing for the Extreme Loading®; for Structures software. Additionally, the authors would like to specifically acknowledge the technical support provided by Michael Hahn and Ismael Mohamed of Applied Science International, LLC with modeling the structure in the Extreme Loading for Structures software environment and exporting structural matrices for the eigenproblem. The authors would also like to acknowledge the assistance provided by Corey Rice, Mike Moss, and Special Agent Yvonne Becker for assistance during the field testing of the structure.
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© 2014 The Society for Experimental Mechanics, Inc.
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Whelan, M.J., Kernicky, T.P., Weggel, D.C. (2014). Structural Identification Using the Applied Element Method: Advantages and Case Study Application. In: Catbas, F. (eds) Dynamics of Civil Structures, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-04546-7_29
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DOI: https://doi.org/10.1007/978-3-319-04546-7_29
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