| Abstract: | We present correction factors that may be applied to the ground motion prediction relations of Abrahamson and Silva, Boore and Atkinson, Campbell and Bozorgnia, and Chiou and Youngs (all in this volume) to model the azimuthally varying distribution of the GMRotI50 component of ground motion (commonly called ‘directivity‘) around earthquakes. Our correction factors may be used for planar or nonplanar faults having any dip or slip rake (faulting mechanism). Our correction factors predict directivity-induced variations of spectral acceleration that are roughly half of the strike-slip variations predicted by Somerville et al. (1997), and use of our factors reduces record-to-record sigma by about 2-20% at 5 sec or greater period. ?? 2008, Earthquake Engineering Research Institute. |
| Genre: | Article |
| ProdID: | 70000553 |
| Citation Author: | Spudich, P.; Chiou, B. S. J. |
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| Citation End Page: | 298 |
| Citation Issue: | 1 |
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| Citation Language: | English |
| Citation Larger Work Title: | Earthquake Spectra |
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| Citation Search Results Text: | Directivity in NGA earthquake ground motions: Analysis using isochrone theory; 2008; Article; Journal; Earthquake Spectra; Spudich, P.; Chiou, B. S. J. |
| Citation Start Page: | 279 |
| Citation Volume: | 24 |
| Citation Year: | 2008 |
| Type: | citation/reference |
| Text: | Directivity in NGA earthquake ground motions: Analysis using isochrone theory; 2008; Article; Journal; Earthquake Spectra; Spudich, P.; Chiou, B. S. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1193/1.2928225 |
| Date Other: | Tue, 28 Sep 2010 23:09 -0500 |
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