| Project/Area Number |
04650519
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Building structures/materials
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
SHINOZAKI Yuzo Department of Architectural Engineering, Lecturer, 工学部, 講師 (80026236)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1992: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Sedimentary basins / Three dimensional model / Forward prediction / Wave propagation characteristics / Boundary integral equation / Green functions / 境界積分方程式 / 異常震域 / 表面波 |
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| Research Abstract |
A direct 3-D boundary element method is applied to evaluate seismic waves in three dimensional sedimentary basin for incident SH, P, SV, and Rayleigh waves. We have utilized the Green's functions for an elastic half-space medium. Since the boundary conditions at the free surface of elastic media are automatically satisfied, the direct 3-D boundary element method is precisely formulated through those Green's functions based on the boundary conditions along a arbitrarily shaped soil interface. Numerical results of surface displacement amplitudes of a semi-spherical sedimentary basin for SH waves propagating nonvertically to the surface show good agreements with those results evaluated with the solution(Sanchez-Sesma et al., 1989)based on wave function expansions and an azimuthal decomposition. It should be noted that the present method is applicable to the scattering of not only incident body waves but also incident surface waves by a 3-D sedimentary basin whose soil interface is arbitrarily shaped, because a boundary element problem is formulated in terms of exact Green's functions which satisfy the free-boundary conditions on the half-space surface.
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