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Differential Motions in Sedimentary Valleys

by Apostolos S. Papageorgiou, Dept of Civil and Environmental, Engineering, Troy, United States,



Document Type: Proceeding Paper

Part of: Probabilistic Mechanics and Structural and Geotechnical Reliability

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 i_c = arcsin (?_r/?_r) (where ?_r, ?_r 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 | Strain | Soil settlement | Seismic tests

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