Decomposition and Effects of Pulse Components in Near-Field Ground Motions
Publication: Journal of Structural Engineering
Volume 136, Issue 6
Abstract
Long-period pulse components in near-field ground motions have been known to cause significant damage to flexible structures. In this paper, an empirical mode decomposition (EMD) approach is used to identify and separate the dominant pulse, high-frequency, and long-period components in near-field ground motions. The pulses synthesized by an analytical pulse model recently proposed by the authors are compared to the extracted pulse components from recorded earthquake records using EMD, and the responses of linear and nonlinear structures subjected to these components are analyzed. The results demonstrate that (1) the characteristics and effects of the pulses generated by the analytical pulse model are similar to those of the extracted pulse components and (2) the pulse components are responsible for the peak responses of elastic structures subjected to near-field ground motions and govern the extent of inelastic structural damage in all frequency ranges.
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Acknowledgments
This work was supported partially by the Earthquake Engineering Research Centers Program of the National Science Foundation under NSF Award No. NSFEEC-9701471 to the Multidisciplinary Center for Earthquake Engineering Research. Any opinions, findings, and conclusions or recommendations expressed in this paper are those of the writers and do not necessarily reflect those of the National Science Foundation. The writers sincerely acknowledge the support of Dr. Norbert Huang and Ms. Caroline Stetter Neel of NASA Goddard Space Flight Center in providing an evaluation copy of the EMD Analysis software package.
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Information
Published In
Journal of Structural Engineering
Volume 136 • Issue 6 • June 2010
Pages: 690 - 699
Copyright
© 2010 ASCE.
History
Received: Aug 26, 2008
Accepted: Sep 24, 2009
Published online: Oct 8, 2009
Published in print: Jun 2010
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