Scattering of SH Waves by an Alluvial Valley of Arbitrary Shape in a Layered Half-Space

尤红兵; 赵凤新; 李方杰

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Scattering of SH Waves by an Alluvial Valley of Arbitrary Shape in a Layered Half-Space

更新时间：2025-12-11

- Scattering of SH Waves by an Alluvial Valley of Arbitrary Shape in a Layered Half-Space
- Issue 3, Pages: 313-318(2008)
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  CLC： U435
- Published：2008
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[1]尤红兵,赵凤新,李方杰.层状场地中任意形状沉积河谷对平面SH波的散射[J].防灾减灾工程学报,2008(03):313-318.

尤红兵, 赵凤新, 李方杰. Scattering of SH Waves by an Alluvial Valley of Arbitrary Shape in a Layered Half-Space[J]. 2008, (3): 313-318.
[1]尤红兵,赵凤新,李方杰.层状场地中任意形状沉积河谷对平面SH波的散射[J].防灾减灾工程学报,2008(03):313-318. DOI：

尤红兵, 赵凤新, 李方杰. Scattering of SH Waves by an Alluvial Valley of Arbitrary Shape in a Layered Half-Space[J]. 2008, (3): 313-318. DOI：

摘要

利用间接边界元方法在频域内求解了层状场地中任意形状沉积河谷对平面SH波的散射;利用土层的精确动力刚度矩阵求解了应力和位移的动力Green函数;结合间接边界元法

研究了沉积河谷宽度、厚度、入射角、入射频率等对地表位移幅值的影响

并与按一维场地模型计算的结果进行了比较。研究表明

沉积河谷有明显的二维散射效应

与一维模型的计算结果差别显著。在工程场地地震安全性评价中

应合理考虑沉积河谷对场地设计地震动参数确定的影响。

Abstract

The scattering of SH waves by an alluvial valley of arbitrary shape in a layered half-space is modeled using the indirect boundary element method（IBEM） in the frequency domain.The Green’s functions of displacements and stresses are calculated by using the exact dynamicstiffness matrix of soil layers.Based on IBEM

the effects of width and thickness of the alluvial valley

and the incident angle and frequency on the surface displacements are studied.These results are compared with that of one-dimensional model.The numerical results indicate: The two-dimensional scattering effect of alluvial valley is significant and quite different from that of one-dimensional model.The influence of alluvial valley on determination of design earthquake ground motion parameters should be considered reasonably in evaluation of seismic safety for engineering site.

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references

工程场地地震安全性评价工作及相关技术问题 [J]. 李小军. 震灾防御技术 . 2006(01)

场地条件对地震动影响研究的若干进展 [J]. 薄景山,李秀领,李山有. 世界地震工程 . 2003(02)

圆弧状沉积盆地与软土单覆盖层出平面地表运动对比 [J]. 袁晓铭,李雨润,孙锐. 地震工程与工程振动 . 2002(04)

局部不规则地形对地震地面运动的影响 [J]. 刘晶波. 地震学报 . 1996(02)

地震工程学[M]. 地震出版社 , 胡聿贤著, 2006

Diffraction of SH-Waves by Subsurface Inclusions of Arbitrary Shape [J] . Michael E. Manoogian,Vincent W. Lee. Journal of Engineering Mechanics . 1996 (2)

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