Earthquake Deconvolution for FLAC
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Earthquake Deconvolution for FLAC
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Earthquake Deconvolution for FLAC

Author: L.H. Mejia; E.M. Dawson | Size: 349 KB | Format: PDF | Quality: Unspecified | Publisher: Itasca Consulting Group, Inc., Minneapolis | Year: 2006 | pages: 9 | ISBN: 0-9767577-0-2


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Design earthquake ground motions for dynamic analyses are typically specified as outcrop motions, which may have to be modified for input at the base of a FLAC model. Often a ‘deconvolution’ analysis using a 1-D wave propagation code, such as the program SHAKE, is performed to obtain the appropriate input motion at depth. This seemingly simple analysis is often the subject of considerable confusion.
In this paper the theory and operation of the program SHAKE and input requirements of FLAC are reviewed, and the application of SHAKE for adapting design earthquake motions for FLAC input is described. Numerical examples illustrating typical cases are presented, and several questions that commonly arise are addressed.

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