Capturing Directivity Effects in the Mean and Aleatory Variability of the NGA-West2 Ground-Motion Prediction Equations, PEER Report 2018-04

Abstract: 

We expect there to be locations around a rupture that experience both positive and negative directivity effects more than others. The concept was to develop a simple model of additional mean and standard deviation to add to existing published ground motion prediction equations to account for this. The directivity effect predicted by Chiou and Youngs [2014] using the directivity parameter DPP [Spudich et al. 2013] was selected as the basis for the model. A suite of rupture geometries for strike-slip and reverse ruptures was generated and the mean and standard deviation of the change in the 5% damped pseudo-spectral acceleration at sites out to rupture distances of 70 km was calculated. Models are presented for the change in mean and standard deviation for both strike-slip and reverse ruptures that use only simple parameters as inputs.

- Electronic Appendices A
- Electronic Appendices B
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- Electronic Appendices D

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Author: 
Jennie A. Watson-Lamprey
Publication date: 
November 1, 2018
Publication type: 
Technical Report
Citation: 
Watson-Lamprey, J.A. (2018). Capturing Directivity Effects in the Mean and Aleatory Variability of the NGA-West2 Ground-Motion Prediction Equations, PEER Report 2018-04. Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA. https://doi.org/10.55461/USOP6050