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CLC number: P315

On-line Access: 2024-08-27

Received: 2023-10-17

Revision Accepted: 2024-05-08

Crosschecked: 2009-04-09

Cited: 14

Clicked: 6788

Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.5 P.619-634

http://doi.org/10.1631/jzus.A0930001


Use of probabilistic and deterministic measures to identify unfavorable earthquake records


Author(s):  Abbas MOUSTAFA, Izuru TAKEWAKI

Affiliation(s):  Department of Urban and Environmental Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku 615-8540, Japan; more

Corresponding email(s):   abbas.moustafa@yahoo.com, takewaki@archi.kyoto-u.ac.jp

Key Words:  Entropy rate, Dispersion index, Power spectral density function (PSDF), Frequency content, Unfavorable ground motion, Resonant acceleration, Critical accelerogram, Energy, Damage index


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Abstract: 
This study introduces measures to identify resonant (concentration of energy in a single or a few frequencies) or unfavorable earthquake ground motions. Probabilistic measures based on the entropy rate and the geometric properties of the power spectral density function (PSDF) of the ground acceleration are developed first. Subsequently, deterministic measures for the frequency content of the ground acceleration are also developed. These measures are then used for identifying resonance and criticality in stochastic earthquake models and 110 acceleration records measured at rock, stiff, medium and soft soil sites. The unfavorable earthquake record for a given structure is defined as the record having a narrow frequency content and dominant frequency close to the structure fundamental natural frequency. Accordingly, the measures developed in this study may provide a basis for selecting records that are capable of producing the highest structural response. Numerical verifications are provided on damage caused to structures by identified resonant records.

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<1>

Sophia

2010-01-29 10:43:17

This study develops measures to identify resonance of earthquake ground motions. Usefulness measures!!

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