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Sensor Technologies for Civil Infrastructures, Volume 2 by Hoon Sohn, Jerome P. Lynch, Ming L. Wang

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4

Output only modal identification and structural damage detection using timefrequency and wavelet techniques for assessing and monitoring civil infrastructures

S. Nagarajaiah,    Rice University, USA

B. Basu,    Trinity College Dublin, Ireland

Y. Yang,    Rice University, USA

Abstract:

The primary objective of this chapter is to develop output only modal identification and structural damage detection. Identification of multidegree of freedom (MDOF) linear time invariant (LTI) and linear time variant (LTV – due to damage) systems based on time-frequency (TF) techniques – such as short-time Fourier transform (STFT), empirical mode decomposition (EMD), and wavelets – and also a newly-merging blind source separation (BSS) technique is discussed. STFT, ...

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