Spatial correlation of peak ground motions and response spectra

K Goda, HP Hong

Research output: Contribution to journalArticle (Academic Journal)peer-review

250 Citations (Scopus)

Abstract

The intensities of ground motions and structural responses at two sites are correlated. The magnitude of the correlation depends on the distance between the sites and the natural vibration periods of the structures. This study investigates the spatial correlation of the peak ground motions and the pseudospectral acceleration (PSA) responses using the California records and the Chi-Chi records. Because the correlation arises from interevent and intraevent variability, the correlations for individual variability alone and for the combined variability are assessed. The analysis results indicate that the spatial intraevent correlation decreases as the separation distance increases and that the magnitude of the correlation of the PSA responses depends on the considered natural vibration periods. The results also indicate that the spatial intraevent correlation of the PSA responses for the California records decays more rapidly than that for the Chi-Chi records. Based on the analysis results, a simple empirical equation to predict the spatially varying correlation coefficient of the PSA responses, which can be employed in seismic-hazard and seismic-risk assessments, is proposed.
Translated title of the contributionSpatial correlation of peak ground motions and response spectra
Original languageEnglish
Pages (from-to)354 - 365
Number of pages12
JournalBulletin of the Seismological Society of America
Volume98
Issue number1
DOIs
Publication statusPublished - Feb 2008

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