Differential Motions in Sedimentary Valleysby Apostolos S. Papageorgiou, Dept of Civil and Environmental, Engineering, Troy, United States,
Abstract: The differential motions (strains), induced in sediment-filled valleys due to incident seismic waves, are investigated. The response of a two-dimensional model of an asymmetric wedge-shaped valley is studied. Valleys of any shape respond very strongly to the horizontally propagating P-wave (SP-wave) which is induced when SV-waves, incident at the critical angle ic = arcsin (βr/αr) (where βr, αr are the S- and P-wave velocities, respectively, of the half-space), interact with the free surface of the half-space.
Subject Headings: Sediment transport | Ground motion | Seismic waves | Two-dimensional models | Half space | Strain | Seismic tests | Asymmetry
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