Abstract
Propagation of surface waves across a vertical wave barrier inserted between two laterally homogeneous quarter-spaces is considered in this paper. Based on the Green's function technique, an analytical approach is developed to examine the reflection and transmission of Rayleigh surface waves across a composite barrier. The composite barrier consists of a high velocity layer sandwiched between two thin layers of low shear velocity materials. The high velocity layer is represented by differential matrix operators which relate the wave fields on each side of the layer. The low velocity layers are modeled by non-rigid or “unwelded” contact conditions which allow partial sliding at the interfaces. Screening ratios of barriers with various combinations of material, geometric, and non-rigidness parameters are compared and discussed in some detail.
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