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Journal of Applied Mathematics
Volume 2014 (2014), Article ID 287605, 10 pages
http://dx.doi.org/10.1155/2014/287605
Research Article

A New Iterative Procedure for Deconvolution of Seismic Ground Motion in Dam-Reservoir-Foundation Systems

1Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC, Canada H3G 1M8
2Hatch Ltd., Niagara Falls, ON, Canada L2E 7J7

Received 28 May 2014; Accepted 14 August 2014; Published 18 September 2014

Academic Editor: Giuseppe Marino

Copyright © 2014 Gurinderbir S. Sooch and Ashutosh Bagchi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The concrete gravity dams are designed to perform satisfactorily during an earthquake since the consequence of failure is catastrophic to the downstream communities. The foundation in a dam is usually modeled by a substructuring approach for the purpose of seismic response analysis. However, the substructuring cannot be used for solving nonlinear dynamic problems that may be encountered in dam-reservoir-foundation systems. For that reason, the time domain approach is preferred for such systems. The deconvolved earthquake input model is preferred as it can remove the seismic scattering effects due to artificial boundaries of the semi-infinite foundation domain. Deconvolution is a mathematical process that allows the adjustment of the amplitude and frequency contents of a seismic ground motion applied at the base of the foundation in order to get the desired output at the dam-foundation interface. It is observed that the existing procedures of deconvolution are not effective for all types of earthquake records. A modified procedure has been proposed here for efficient deconvolution of all types of earthquake records including high-frequency and low-frequency ground motions.