Publicado 12 números por año
ISSN Imprimir: 1091-028X
ISSN En Línea: 1934-0508
Indexed in
STOCHASTIC DEAMPLIFICATION OF SEISMIC MOTION THROUGH MULTILAYERED POROUS MEDIA
SINOPSIS
The deamplification model developed by Zendagui et al. [Soil Dyn. Earthq. Eng., vol. 18, pp. 409–421, 1999] has been adapted in this study for the case of wave propagation in multilayered porous media. The wave amplitudes are evaluated using the transfer matrix method following Biot's theory for the cases of P1, P2, and SV wave incidences. An iterative process is incorporated in the deamplification methodology to generate an input wave amplitude distribution function compatible with the suitable free-field coherency model. The results indicate that, as for an elastic medium, the motion is more coherent in depth than at the free surface and that coherency is not the same for the vertical and horizontal components. To investigate the saturation degree effects, a parametric study is performed. The results indicate that, even if the saturation degree decreases slightly below the complete saturation, it influences the coherencies of both horizontal and vertical motions. In addition, the generation process indicates that, in this case, the wave-front content necessary to produce a coherency identical to the Luco and Wong model at the free field is more focused with less intensity than that required in the case of complete saturation. Moreover, the saturation degree effect depends on the conditions of the incident waves.
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Olapour Mohammad Mohsen, Imam Seyed Mohammad Reza, Oulapour Masoud, A parametric numerical study of the effect of interlayers and faults on the site amplification in cohesive soils, Arabian Journal of Geosciences, 14, 23, 2021. Crossref