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Two‐dimensional scattering of SH waves due to a discontinuity in bedrock
Author(s) -
Heymsfield Ernest
Publication year - 1999
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/(sici)1096-9845(199908)28:8<841::aid-eqe843>3.0.co;2-r
Subject(s) - discontinuity (linguistics) , bedrock , half space , geology , viscoelasticity , parametric statistics , geotechnical engineering , shear waves , shear (geology) , displacement (psychology) , geometry , physics , mathematical analysis , mathematics , petrology , geomorphology , psychology , statistics , psychotherapist , thermodynamics
The direct boundary integral equation technique is applied to determine the impact on surface amplification caused by an inhomogeneity in a bedrock half‐space. The particular soil‐rock configuration studied is one in which a soil layer rests on a rock half‐space which includes a rock inclusion. The particular rock inclusion considered for this study is a semi‐infinite rock layer with its upper boundary bordering the soil layer. Materials are considered viscoelastic except for the section of the rock half‐space below the level of the rock inclusion which is considered elastic. A parametric study is performed to determine controlling factors for surface displacement due to a vertically incident shear wave. The study includes varying the stiffness and the thickness of the inclusion for a range of frequencies. Solutions from a one‐dimensional analysis are compared with the results of a two‐dimensional analysis in order to establish limits inside of which a two‐dimensional analysis is required. Copyright © 1999 John Wiley & Sons, Ltd.