Conference proceeding
Evaluation of site response by means of blind deconvolution of ground surface seismic recordings
Proceedings, Sixth U.S. National Conference on Earthquake Engineering [computer file], pp.12 pages-12 pages
01 Jan 1998
Abstract
A novel blind deconvolution methodology for the identification of the local site characteristics based on two seismograms recorded on the free surface of the sediment site is presented. The approach does not require recordings at depth nor at a nearby rock outcrop, and eliminates the need of any prior parameterization of source and site characteristics. It considers that the surface recordings are the result of the convolution of the "input motion at depth" with transfer functions (channels), representing the characteristics of the transmission path of the waves from the input location to each recording station. The input motion at depth is considered to be the common component in the seismograms (same input in a statistical sense). The channel characteristics are considered to be the part in the seismograms that is noncommon, since the travel path of the waves from the input motion location at depth to each recording station is different, due to spatially variable site effects. By means of blind deconvolution, the algorithm eliminates what is common in the seismograms, namely the input motion at depth, and retains what is different, namely the transfer functions of the site from the input location to each recording station. It predicts the site response in both frequency and time domains, and identifies the duration of the site's impulse response functions. The methodology is applied herein to synthetic data at realistic sites for performance validation. The blindly predicted results are in almost perfect agreement with the actual site characteristics, indicating that the approach is a promising new tool for site response identification from recorded data.
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Details
- Title
- Evaluation of site response by means of blind deconvolution of ground surface seismic recordings
- Creators
- A ZervaA PetropuluP.-Y. Bard
- Publication Details
- Proceedings, Sixth U.S. National Conference on Earthquake Engineering [computer file], pp.12 pages-12 pages
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- [Retired Faculty]; Civil, Architectural, and Environmental Engineering
- Identifiers
- 991021957267504721