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All figures (13)
Table 3. Flexural rigidity reduction factor (EIeff/EIy) at critical member zones of the structure in Figure 5 for the two different damage states considered due to different seismic intensity excitation
Figure 7. Moment-curvature (M-φ) hysteretic curves at the left plastic hinge of the 1st storey beam for (a) damage state 1 and (b) damage state 2.
Figure 3. MUSIC pseudo-spectra of structure 1 in Fig.2(a) obtained for co-prime sampling specifications of
Figure 1. Simulation-based assessment framework for the proposed natural frequencies identification approach in OMA applications
Figure 8. Spectrum estimation from noisy acceleration response signals with SNR=10dB at the (a) first, (b) second, and (c) third floor of the structure in Fig. 5 (healthy state) subject to 80s duration white noise base excitation
Table 1. Co-prime sampling specifications
Figure 2. Normalized target PSDs in Eq.(13) for the two adopted 3-DOF structural systems.
Table 2. Average secant flexural rigidity at yielding, EIy, at the ends of the frame structural members of Fig. 5
Figure 6. Horizontal ground motion component recorded at “Sanjo Shinbori” station during the Mw=6.8 Chuetsu-oki event (16.7.2007) in Japan: (a) Time-history, (b) Squared amplitude of Fourier spectrum [23] 4.2 Finite element modelling of earthquake-induced
Table 4. Assessment of MUSIC spectra from co-prime sampled noisy measurements for damage detection based on structural natural frequency shifts: damage state 1
Figure 10. MUSIC pseudo-spectra with co-prime sampling of noisy acceleration response signals with SNR=10dB at the (a) first, (b) second, and (c) third floor for the healthy and the damaged state 2 structure
Table 5. Assessment of MUSIC spectra from co-prime sampled noisy measurements for damage detection based on structural natural frequency shifts: damage state 2
Figure 9. MUSIC pseudo-spectra with co-prime sampling of noisy acceleration response signals with SNR=10dB at the (a) first, (b) second, and (c) third floor for the healthy and the damaged state 1 structure
Journal Article
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DOI
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A compressive MUSIC spectral approach for identification of closely-spaced structural natural frequencies and post-earthquake damage detection
[...]
Kyriaki Gkoktsi
,
Agathoklis Giaralis
1
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Institutions (1)
City University London
1
07 Feb 2020
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Probabilistic Engineering Mechanics