Andersen, P.

Kirkegaard, Poul Henning

Skjærbæk, P. S.

English

Identification of Time Varying Civil Engineering Structures using Multivariate Recursive Time Domain Models

This paper presents system identification results of an RC-structure using multivariable autoregressive moving-average vector models (ARMAV) on a running window, reursive ARMAW models (RARMAV) and Kalman filtering of a simple spring-mass-dashpot system. The identification techniques are used on simulated data generated by the non-linear finite element program SARCOF modelling a 6-storey 2-bay concete structure subjected to amplitude modulated Gaussian white noise filtered through a Kanai-Tajimi filter. The estiated natural frequencies and mode shapes of the two first modes ae compared with the smoothed quanties which have been obtained from SARCOF. The results show the usefulness of the technique for identification of a time varying civil engineering structure. It is found that all the techniques give reliable estiates of the frequencies of the two lowest modes and the first mode shape. Only the Kalman filtering gives reliable estimates of the second mode shape

    Aalborg UniversitetIdentification of Time Varying Civil Engineering Structures using MultivariateRecursive Time Domain ModelsAndersen, P.; Skjærbæk, P. S.; Kirkegaard, Poul HenningPublication date:1996Document VersionEarly version, also known as pre-printLink to publication from Aalborg UniversityCitation for published version (APA):Andersen, P., Skjærbæk, P. S., & Kirkegaard, P. H. (1996). Identification of Time Varying Civil EngineeringStructures using Multivariate Recursive Time Domain Models. Dept. of Building Technology and StructuralEngineering, Aalborg University. Fracture and Dynamics Vol. R9619 No. 79General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright ownersand it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.            ? Users may download and print one copy of any publication from the public portal for the purpose of private study or research.            ? You may not further distribute the material or use it for any profit-making activity or commercial gain            ? You may freely distribute the URL identifying the publication in the public portal ?Take down policyIf you believe that this document breaches copyright please contact us at vbn@aub.aau.dk providing details, and we will remove access tothe work immediately and investigate your claim.Downloaded from vbn.aau.dk on: November 29, 2020

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Identification of Time Varying Civil Engineering Structures using Multivariate Recursive Time Domain Models

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