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Two‐dimensional scattering of in‐plane body 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(199912)28:12<1651::aid-eqe887>3.0.co;2-2
Subject(s) - geology , discontinuity (linguistics) , bedrock , seismic wave , geotechnical engineering , plane (geometry) , displacement (psychology) , half space , parametric statistics , geometry , geophysics , geomorphology , psychology , mathematical analysis , statistics , mathematics , psychotherapist
The direct boundary integral equation technique is used to study in‐plane surface amplification of in‐plane seismic body waves for the case of an inhomogeneity in a bedrock half‐space. In the studied soil configuration, a soil layer rests on a rock half‐space which includes a rock inclusion. The rock inclusion considered is a semi‐infinite horizontal rock layer in which its upper boundary borders the soil layer. Materials in the soil–rock configuration 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 in‐plane body waves. The study investigates varying the stiffness and the thickness of the rock inclusion for a range of frequencies and wave incidence angles. Anti‐plane waves for this type of soil‐rock configuration have been addressed in a previous article by Heymsfield ( Earthquake Engng. Struct. Dyn. 28 : 841–855 (1999)). Copyright © 1999 John Wiley & Sons, Ltd.