A wavelet-based approach to identifying structural modal parameters from seismic response and free vibration data

Chiung-Shiann Huang*, Shih-Lin Hung, C. I. Lin, W. C. Su

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

This work presents the use of a discrete wavelet transform to determine the natural frequencies, damping ratios, and mode shapes of a structure from its free vibration or earthquake response data. The wavelet transform with orthonormal wavelets is applied to the measured acceleration responses of a structural system, and to reconstruct the discrete equations of motion in various wavelet subspaces. The accuracy of this procedure is numerically confirmed; the effects of mother wavelet functions and noise on the ability to accurately estimate the dynamic characteristics are also investigated. The feasibility of the present procedure to elucidate real structures is demonstrated through processing the measured responses of steel frames in shaking table tests and the free vibration responses of a five-span arch bridge with a total length of 440 m.

Original languageEnglish
Pages (from-to)408-423
Number of pages16
JournalComputer-Aided Civil and Infrastructure Engineering
Volume20
Issue number6
DOIs
StatePublished - 1 Nov 2005

Fingerprint Dive into the research topics of 'A wavelet-based approach to identifying structural modal parameters from seismic response and free vibration data'. Together they form a unique fingerprint.

Cite this