Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 8th International Symposium on Reliability Engineering and Risk Management, ISRERM 2022 |
| Editors | Michael Beer, Enrico Zio, Kok-Kwang Phoon, Bilal M. Ayyub |
| Pages | 277-281 |
| Number of pages | 5 |
| Publication status | Published - 2022 |
| Event | 8th International Symposium on Reliability Engineering and Risk Management, ISRERM 2022 - Hannover, Germany Duration: 4 Sept 2022 → 7 Sept 2022 |
Publication series
| Name | Proceedings of the 8th International Symposium on Reliability Engineering and Risk Management, ISRERM 2022 |
|---|
Abstract
As one of the essential parameters, the ground motion frequency is of significance for earthquake engineering and seismology. Pulselike ground motions attract increasing attention since it potentially causes severer damage to structures than ordinary ground motion. However, compared with the lots of researches on the time domain, few studies consider the frequency-domain characteristics of pulselike ground motion. Hence, this study attempts to analyze the frequency-domain feature of pulse-like ground motion. Furthermore, owing to the limitation of the Fourier transform on the time-frequency conversion of the non-stationary signals, the frequency-domain characteristics of ground motions are analyzed using the wavelet packet transform. The frequency-domain differences between pulse-like and non-pulse ground motions are compared using recorded and simulated ground motions. The results show that the energy (5%-75%) of pulse-like ground motions concentrates on a shorter frequency band than non-pulse ground motion. Moreover, the cumulative energy of pulse-like ground motion is about twice times of non-pulse ground motion in 0 - 1 Hz, even when the pulse-like and non-pulse ground motion is compatible with the same target spectrum. The non-pulse ground motion, by contrast, has more energies at greater than 10 Hz. Hence, the pulse-like ground motion with high energy in the 0 - 1 Hz potentially causes severer damage to structures, for which the fundamental frequency is less than 1 Hz. The effects of the frequency-domain feature on structural safety will be carried out in further study using non-linear time history analysis.
Keywords
- frequency, near-fault earthquake, pulse-like ground motion, spectrum compatibility, wavelet transform
ASJC Scopus subject areas
- Decision Sciences(all)
- Management Science and Operations Research
- Engineering(all)
- Safety, Risk, Reliability and Quality
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Proceedings of the 8th International Symposium on Reliability Engineering and Risk Management, ISRERM 2022. ed. / Michael Beer; Enrico Zio; Kok-Kwang Phoon; Bilal M. Ayyub. 2022. p. 277-281 (Proceedings of the 8th International Symposium on Reliability Engineering and Risk Management, ISRERM 2022).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Frequency comparison of the pulse-like and non-pulse ground motions
AU - Chen, G.
AU - Liu, Y.
AU - Beer, M.
PY - 2022
Y1 - 2022
N2 - As one of the essential parameters, the ground motion frequency is of significance for earthquake engineering and seismology. Pulselike ground motions attract increasing attention since it potentially causes severer damage to structures than ordinary ground motion. However, compared with the lots of researches on the time domain, few studies consider the frequency-domain characteristics of pulselike ground motion. Hence, this study attempts to analyze the frequency-domain feature of pulse-like ground motion. Furthermore, owing to the limitation of the Fourier transform on the time-frequency conversion of the non-stationary signals, the frequency-domain characteristics of ground motions are analyzed using the wavelet packet transform. The frequency-domain differences between pulse-like and non-pulse ground motions are compared using recorded and simulated ground motions. The results show that the energy (5%-75%) of pulse-like ground motions concentrates on a shorter frequency band than non-pulse ground motion. Moreover, the cumulative energy of pulse-like ground motion is about twice times of non-pulse ground motion in 0 - 1 Hz, even when the pulse-like and non-pulse ground motion is compatible with the same target spectrum. The non-pulse ground motion, by contrast, has more energies at greater than 10 Hz. Hence, the pulse-like ground motion with high energy in the 0 - 1 Hz potentially causes severer damage to structures, for which the fundamental frequency is less than 1 Hz. The effects of the frequency-domain feature on structural safety will be carried out in further study using non-linear time history analysis.
AB - As one of the essential parameters, the ground motion frequency is of significance for earthquake engineering and seismology. Pulselike ground motions attract increasing attention since it potentially causes severer damage to structures than ordinary ground motion. However, compared with the lots of researches on the time domain, few studies consider the frequency-domain characteristics of pulselike ground motion. Hence, this study attempts to analyze the frequency-domain feature of pulse-like ground motion. Furthermore, owing to the limitation of the Fourier transform on the time-frequency conversion of the non-stationary signals, the frequency-domain characteristics of ground motions are analyzed using the wavelet packet transform. The frequency-domain differences between pulse-like and non-pulse ground motions are compared using recorded and simulated ground motions. The results show that the energy (5%-75%) of pulse-like ground motions concentrates on a shorter frequency band than non-pulse ground motion. Moreover, the cumulative energy of pulse-like ground motion is about twice times of non-pulse ground motion in 0 - 1 Hz, even when the pulse-like and non-pulse ground motion is compatible with the same target spectrum. The non-pulse ground motion, by contrast, has more energies at greater than 10 Hz. Hence, the pulse-like ground motion with high energy in the 0 - 1 Hz potentially causes severer damage to structures, for which the fundamental frequency is less than 1 Hz. The effects of the frequency-domain feature on structural safety will be carried out in further study using non-linear time history analysis.
KW - frequency
KW - near-fault earthquake
KW - pulse-like ground motion
KW - spectrum compatibility
KW - wavelet transform
UR - http://www.scopus.com/inward/record.url?scp=85202038413&partnerID=8YFLogxK
U2 - 10.3850/978-981-18-5184-1_MS-09-134-cd
DO - 10.3850/978-981-18-5184-1_MS-09-134-cd
M3 - Conference contribution
AN - SCOPUS:85202038413
SN - 9789811851841
T3 - Proceedings of the 8th International Symposium on Reliability Engineering and Risk Management, ISRERM 2022
SP - 277
EP - 281
BT - Proceedings of the 8th International Symposium on Reliability Engineering and Risk Management, ISRERM 2022
A2 - Beer, Michael
A2 - Zio, Enrico
A2 - Phoon, Kok-Kwang
A2 - Ayyub, Bilal M.
T2 - 8th International Symposium on Reliability Engineering and Risk Management, ISRERM 2022
Y2 - 4 September 2022 through 7 September 2022
ER -