TY  - JOUR
ID  - epos1444
UR  - http://dx.doi.org/10.1023/B:BEEE.0000038950.95341.74
IS  - 1
A1  - Douglas, John
A1  - Suhadolc, Peter
A1  - Costa, G.
N2  - This article has two purposes. Firstly, a validation exercise of the modal summation technique for the computation of synthetic strong-motion records is performed for two regions of Europe
(Umbria-Marche and south Iceland), using a variety of region speci?c crustal structure models, by
comparing the predicted ground motion amplitudes with observed motions. It is found that the rate of
decay of ground motions is well predicted by the theoretical decay curves but that the absolute size
of the ground motions is underpredicted by the synthetic time-histories. This is thought to be due to
the presence of low-velocity surface layers that amplify the ground motions but are not included in
the crustal structure models used to compute the synthetic time-histories.
Secondly, a new distance metric based on the computed theoretical decay curves is introduced
which should have the ability to model the complex decay of strong ground motions. The ability
of this new distance metric to reduce the associated scatter in empirically derived equations for the
estimation of strong ground motions is tested. It is found that it does not lead to a reduction in the
scatter but this is thought to be due to the use of crustal structure models that are not accurate or
detailed enough for the regions studied.
VL  - 2
TI  - On the Incorporation of the Effect of Crustal Structure into Empirical Strong Ground Motion Estimation
AV  - none
EP  - 99
Y1  - 2004///
PB  - Springer Verlag
JF  - Bulletin of Earthquake Engineering
KW  - attenuation relations
KW  -  crustal structure
KW  -  modal summation
KW  -  strong ground motion estimation
SN  - 1570-761X
SP  - 75
ER  -