Epistemie Uncertainty for NGA-West2 Models

被引:91
作者
Al Atik, Linda [1 ]
Youngs, Robert R. [2 ]
机构
[1] Linda Alatik Consulting, San Francisco, CA 94110 USA
[2] AMEC Environm & Infrastruct Inc, Oakland, CA 94612 USA
关键词
AVERAGE HORIZONTAL COMPONENT; SHALLOW CRUSTAL EARTHQUAKES; PEAK GROUND MOTION; RESPONSE SPECTRA; NGA MODEL; PGV;
D O I
10.1193/062813EQS173M
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The development of the NGA-West2 ground motion prediction equations (GMPEs) is a collaborative effort with many interactions and exchange of ideas among the developers. The NGA-West2 developers indicate that additional epistemic uncertainty needs to be incorporated into the median ground motion estimation from each of the five NGA-West2 GMPEs in order to more fully represent an appropriate level of epistemic uncertainty. A proposed minimum additional epistemic uncertainty is evaluated based on statistical estimates of the uncertainty in the median predictions of each GMPE. The proposed additional epistemic uncertainty model is distance-independent but depends on magnitude, style of faulting (SOF), and spectral period. The epistemic uncertainty in the median predictions from each GMPE is then modeled using a three-point discrete approximation to a normal distribution.
引用
收藏
页码:1301 / 1318
页数:18
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