Jack W. Baker

Thumbnail image of Correlation of Response Spectral Values for Multi-Component Ground Motions journal article cover page

Ground-motion prediction (attenuation) models predict the probability distributions of spectral acceleration values for a specified earthquake event. In this article a large number of strong ground motions are used to empirically estimate these correlations, and nonlinear regression is used to develop approximate analytical equations for their evaluation.

Thumbnail image of The Conditional Mean Spectrum: A Tool for Ground Motion Selection journal article cover page

The commonly used Uniform Hazard Spectrum (UHS) is shown here to be an unsuitable target for this purpose, as it conservatively implies that large-amplitude spectral values will occur at all periods within a single ground motion. An alternative, termed a Conditional Mean Spectrum (CMS), is presented here.

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