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Title: Analysis of dynamic characteristics of the Canton Tower under different earthquakes
Authors: Li, H
Liu, JK
Chen, WH
Lu, ZR
Xia, Y 
Ni, YQ 
Keywords: Ambient measurement
High-rise structure
Modal identification
Time-frequency analysis
Issue Date: 2015
Publisher: Multi-Science
Source: Advances in structural engineering, 2015, v. 18, no. 7, p. 1087-1100 How to cite?
Journal: Advances in structural engineering 
Abstract: This paper presents the experimental modal analysis of the Canton Tower from the ambient vibration measurements under different earthquake excitation conditions. Firstly, the time history and Power Spectral Density (PSD) of the acceleration response under different earthquake excitations have been compared. Secondly, two output-only modal identification techniques are applied to the field measurements under earthquake excitations to identify the dynamic properties of the tower, namely, the Frequency Domain Decomposition (FDD) and the Subspace Stochastic Identification (SSI). At last, the Hilbert-Huang transform (HHT) method is applied to obtain the instantaneous frequencies and energy distribution under different loadings in the time-frequency domain and the results are compared with those from wavelet transform. The modal properties of the Canton Tower presented in this paper can be used as baseline for structural health monitoring and the analysis of dynamic characteristic of the high-rise structures under different earthquake excitations in future.
ISSN: 1369-4332
EISSN: 2048-4011
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