Identification of Seismic Ground Motions in a Near-Surface 2D Domain Subject to Unknown SH Incident Waves

Bruno P. Guidio, Chanseok Jeong

Research output: Contribution to journalConference articlepeer-review

Abstract

A new inversion approach for estimating the shear wave motions in an interior domain surrounded by the domain reduction method (DRM) layer from sparsely measured seismic motion data is presented in this paper. We consider a 2D domain truncated by wave-absorbing boundary conditions (WABC), and the DRM is utilized to inject incident waves into the domain. We attempt to identify an effective seismic force at the DRM layer and reconstruct the ground motions in an interior domain. A gradient-based minimization method minimizes a misfit between measured motions induced by targeted effective forces and their estimated counterparts. The numerical results show that targeted ground motions in an interior domain can be reconstructed. To accurately reconstruct the wave responses, a minimum sensor spacing is required, and it clearly depends on the dominant frequency of incident waves.

Original languageEnglish
Pages (from-to)599-607
Number of pages9
JournalGeotechnical Special Publication
Volume2022-March
Issue numberGSP 334
DOIs
StatePublished - 2022
Event2022 GeoCongress: State of the Art and Practice in Geotechnical Engineering - Geophysical and Earthquake Engineering and Soil Dynamics - Charlotte, United States
Duration: Mar 20 2022Mar 23 2022

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