Journal of Zhejiang University-SCIENCE A

, Volume 10, Issue 5, pp 619–634 | Cite as

Use of probabilistic and deterministic measures to identify unfavorable earthquake records

  • Abbas MoustafaEmail author
  • Izuru Takewaki


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 words

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

CLC number



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Copyright information

© Zhejiang University and Springer-Verlag GmbH 2009

Authors and Affiliations

  1. 1.Department of Urban and Environmental Engineering, Graduate School of EngineeringKyoto UniversityNishikyo-kuJapan
  2. 2.Department of Civil Engineering, School of EngineeringMinia UniversityMiniaEgypt

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