TY  - JOUR
A1  - Bommer, Julian J.
A1  - Scherbaum, Frank
A1  - Bungum, Hilmar
A1  - Cotton, Fabrice
A1  - Sabetta, F.
A1  - Abrahamson, Norman A.
T1  - On the use of logic trees for ground-motion prediction equations in seismic-hazard analysis
N2  - Logic trees are widely used in probabilistic seismic hazard analysis as a tool to capture the epistemic uncertainty associated with the seismogenic sources and the ground-motion prediction models used in estimating the hazard. Combining two or more ground-motion relations within a logic tree will generally require several conversions to be made, because there are several definitions available for both the predicted ground-motion parameters and the explanatory parameters within the predictive ground-motion relations. Procedures for making conversions for each of these factors are presented, using a suite of predictive equations in current use for illustration. The sensitivity of the resulting ground-motion models to these conversions is shown to be pronounced for some of the parameters, especially the measure of source-to-site distance, highlighting the need to take into account any incompatibilities among the selected equations. Procedures are also presented for assigning weights to the branches in the ground-motion section of the logic tree in a transparent fashion, considering both intrinsic merits of the individual equations and their degree of applicability to the particular application
Y1  - 2005
SN  - 0037-1106
ER  -