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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2009, Vol. 10 Issue (5): 619-634    DOI: 10.1631/jzus.A0930001
Civil and Mechanical Engineering     
Use of probabilistic and deterministic measures to identify unfavorable earthquake records
Abbas MOUSTAFA, Izuru TAKEWAKI
Department of Urban and Environmental Engineering, Graduate School of Engineering, Kyoto University, Nishikyo-ku 615-8540, Japan; Department of Civil Engineering, School of Engineering, Minia University, Minia 61111, Egypt
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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.

Key wordsEntropy rate      Dispersion index      Power spectral density function (PSDF)      Frequency content      Unfavorable ground motion      Resonant acceleration      Critical accelerogram      Energy     
Received: 16 March 2009     
CLC:  P315  
Cite this article:

Abbas MOUSTAFA, Izuru TAKEWAKI. Use of probabilistic and deterministic measures to identify unfavorable earthquake records. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(5): 619-634.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0930001     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2009/V10/I5/619

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