Amplitude Variability in Simulated Incoherent Seismic Ground Motions1
Publication: Journal of Engineering Mechanics
Volume 133, Issue 7
Abstract
This note compares in detail four commonly used schemes for the simulation of spatially variable ground motions. Emphasis is placed not only on the conformity of the simulations with the power and cross spectral density of the random field but, also, on the examination of the consistency of the simulations with the homogeneity condition, and the (Fourier) amplitude variability of the simulations. It is shown that, whereas three techniques that simulate ground motions in parallel satisfy the homogeneity requirement, produce simulations with random amplitudes, and amplitude and phase variability consistent with that of recorded data, one technique that simulates motions in sequence does not.
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Acknowledgments
During the course of this work, L. S. K. and D. P. were supported by the Hong Kong Research Grant Council under Grant No. UNSPECIFIEDHKUST 6253/00E and A. Z. was supported by the USA National Science Foundation under Grant Nos. NSFCMS-9725567 and NSFPOWRE-CMS-9870509. The support of these grants is gratefully acknowledged.
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Information & Authors
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Published In
Journal of Engineering Mechanics
Volume 133 • Issue 7 • July 2007
Pages: 844 - 848
Copyright
© 2007 ASCE.
History
Received: Sep 3, 2003
Accepted: Oct 24, 2006
Published online: Jul 1, 2007
Published in print: Jul 2007
Notes
Based on short papers presented at the 13th ASCE Engineering Mechanics Division Specialty Conference, Johns Hopkins Univ., Baltimore, June 13–16, 1999 (Katafygiotis et al. 1999a) and at the 8th International Conference on Application of Statistics and Probability in Civil Engineering (ICASP8), Sydney, Australia, December 12–15, 1999 (Katafygiotis et al. 1999b).
Note. Associate Editor: Andrew W. Smyth
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