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Scattering of plane p waves by circular-arc layered alluvial valleys: An analytical solution

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Acta Seismologica Sinica(English Edition) 2001年第2期14卷 176-195页

作者： LIANG Jian-wen Department of Civil Engineering Tianjin University Tianjin China Department of Civil Engineering University of Southern California Los Angeles U.S.A.

An analytical solution for scattering of plane p waves by circular-arc layered alluvial valleys was derived by Fourier-Bessel series expansion technique, and the solution was utilized to analyze the effects of alluvia... 详细信息

关键词： scattering plane p waves circular-arc layered alluival valley analytical solution p315.3

3-D Scattering of Obliquely Incident plane p waves by Alluvial Valley Embedded in Layered Half-Space

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Transactions of Tianjin University 2012年第5期18卷 357-365页

作者：巴振宁梁建文任强强 School of Civil Engineering Tianjin University Key Laboratory of Coast Civil Structure Safety of Ministry of Education

The indirect boundary element method(IBEM) was established to solve the problem of 3-D seismic responses of 2-D topographies,by calculating the free-field responses with the direct-stiffness method and simulating the scattering wave fields with the dynamic Green's functions of moving distributed *** proposed method yields accurate results,because the 3-D dynamic stiffness matrixes used are exact and the fictitious moving distributed loads can be acted directly on the interface between the alluvial valley and the layered half-space without *** comparison with the published methods verifies the validity of the proposed *** the numerical analyses are performed to give some beneficial *** study shows that 3-D scattering by an alluvial valley is essentially different from the 2-D case,and that the presence of soil layer affects not only the amplitude value of surface displacements but also the distribution of surface displacements.

关键词： 3-D scattering layered half-space alluvial valley plane p waves

Diffraction of plane p waves around an alluvial valley in poroelastic half-space

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Earthquake Science 2010年第1期23卷 35-43页

作者： Zhongxian Liu Jianwen Liang Department of Civil Engineering Tianjin University Tianjin 300072 China

Diffraction of plane p waves around an alluvial valley of arbitrary shape in poroelastic half-space is investigated by using an indirect boundary integral equation method. Based on the Green＇s fimctions of line source in poroelastic half-space, the scattered waves are constructed using the fictitious wave sources close to the interface of the valley and the density of ficti- tious wave sources are determined by boundary conditions. The precision of the method is verified by the satisfaction extent of boundary conditions, and the comparison between the degenerated solutions and available results in single-phase case. Finally, the nature of diffraction of plane p waves around an alluvial valley in poroelastic half-space is investigated in detail through nu- merical examples.

关键词： diffraction plane p waves alluvial valley poroelastic half-space indirect boundary integration equation method