Forward prediction model of earthquake ground motion in sedimentary basins for seismic design of structures

用于结构抗震设计的沉积盆地地震动正演预测模型

• 批准号: 04650519
• 负责人: SHINOZAKI Yuzo
• 金额: $ 1.34万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650519/
• 关键词: 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

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.

应用直接三维边界元方法计算了三维沉积盆地中入射SH、P、SV和Rayleigh波的地震波。我们将格林函数用于弹性半空间媒质。由于弹性介质自由面上的边界条件是自动满足的，因此直接三维边界元方法通过基于任意形状土界面边界条件的格林函数来精确地建立。半球形沉积盆地SH波非垂直传播的地表位移振幅的数值计算结果与Sanchez-Sesma等人(Sanchez-Sesma等，)基于波函数展开和方位分解的解的结果吻合较好。值得注意的是，本方法不仅适用于土壤界面为任意形状的三维沉积盆地对入射体波的散射，还适用于入射面波的散射，因为边界元问题是用满足半空间表面自由边界条件的精确格林函数来表示的。

项目成果

篠崎祐三・吉田一博: "Seismic Waves in 3-D Sedimentary Basins" 9th Japan Earthquake Engineering Symposium. (投稿中). (1994)

Yuzo Shinozaki 和 Kazuhiro Yoshida：“3-D 沉积盆地中的地震波”第 9 届日本地震工程研讨会（目前正在提交）。

篠崎祐三・吉田一博: "3次元不整形堆積地盤の地震動(2)" 地球惑星科学関連学会合同大会予稿集. F22-13 (1994)

Yuzo Shinozaki和Kazuhiro Yoshida：“三维不规则形状沉积地面中的地震运动（2）”地球与行星科学相关学会联合会议论文集F22-13（1994）。

Yuzo SHINOZAKI and Kazuhiro YOSHIDA: "SEISMIC WAVES IN 3-D SEDIMENTARY BASINS" Proc.of the Japan Earthquake Engineering Symposium. (submitted). (1994)

Yuzo Shinozaki 和 Kazuhiro YOSHIDA：“3-D 沉积盆地中的地震波”日本地震工程研讨会论文集。

Yuzo SHINOZAKI and Kazuhiro YOSHIDA: "EARTHQUAKE GROUND MOTION IN 3-D SEDIMENTARY BASINS" Reports of the Architectural Institute of Japan(Structural Division). (in Japanese). 241-242 (1993)

Yuzo Shinozaki 和 Kazuhiro YOSHIDA：“3-D 沉积盆地中的地震地面运动”日本建筑学会（结构部门）的报告。

篠崎祐三: "3次元盆地構造の地震動特性" 地球惑星科学関連学会合同大会予稿集. D21-14 (1993)

Yuzo Shinozaki：“三维盆地结构的地震运动特征”地球与行星科学相关学会联席会议论文集D21-14（1993）。