Investigating strong ground-motion variability using analysis of variance and two-way-fit plots
Douglas, John and Gehl, Pierre (2008) Investigating strong ground-motion variability using analysis of variance and two-way-fit plots. Bulletin of Earthquake Engineering, 6 (3). pp. 389-405. ISSN 1573-1456 (https://doi.org/10.1007/s10518-008-9063-8)
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A statistical method to quantitatively assess the relative importance of unmodelled site and source effects on the observed variability (σ) in ground motions is presented. The method consists of analysis of variance (ANOVA) using the computed residuals with respect to an empirical ground-motion model for strong-motion records of various earthquakes recorded at a common set of stations. ANOVA divides the overall variance (σ 2) into the components due to site and source effects (respectively σ S 2 and σ E 2 ) not modelled by the ground-motion model plus the residual variance not explained by these effects (σ R 2 ). To test this procedure, four sets of observed strong-motion records: two from Italy (Umbria-Marche and Molise), one from the French Antilles and one from Turkey, are used. It is found that for the data from Italy, the vast majority of the observed variance is attributable to unmodelled site effects. In contrast, the variation in ground motions in the French Antilles and Turkey data is largely attributable, especially at short periods, to source effects not modelled by the ground-motion estimation equations used.
ORCID iDs
Douglas, John ORCID: https://orcid.org/0000-0003-3822-0060 and Gehl, Pierre;-
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Item type: Article ID code: 53630 Dates: DateEventAugust 2008Published14 March 2008Published OnlineSubjects: Science > Geology
Technology > Engineering (General). Civil engineering (General)Department: Faculty of Engineering > Civil and Environmental Engineering Depositing user: Pure Administrator Date deposited: 07 Jul 2015 11:01 Last modified: 11 Nov 2024 11:07 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/53630