Rayleigh and body waves due to incident Rayleigh waves in a two-dimensional irregular ground - Based on the thin layered element and finite element method

被引：0

作者：

Nakagawa, Hiroto ^{[1
]}

Nakai, Shoichi ^{[1
]}

机构：

[1] Graduate School of Engineering, Chiba University

来源：

Journal of Structural and Construction Engineering | 2009年 / 74卷 / 644期

关键词：

Finite element method; H/V spectrum; Irregular ground; Microtremor; Rayleigh wave; Thin layered element method;

D O I：

10.3130/aijs.74.1715

中图分类号：

学科分类号：

摘要：

In this paper, wave propagation in an irregular ground due to an incident Rayleigh wave is formulated by combining the thin layered element method and the finite element method. Based on the numerical analysis, the following conclusions are made: 1. A comparison with the theoretical results has shown that the thin layered element method with quadratic elements can give very accurate medium responses of Rayleigh waves in addition to eigenvalues. 2. An analysis of an incident Rayleigh wave propagating toward an irregular ground has shown that the contribution of generated body waves becomes large in the vicinity of the irregularity and that the contribution of body and Rayleigh waves changes according to the distance from the irregularity. 3. A study of Rayleigh wave propagation from multiple sources has pointed out that the peak frequency and its height of H/V spectrum changes according to the distance from the irregularity, which is harmonious with measured results. 4. It has also revealed that the contribution of body waves generated from a slope is large only in the frequencies close to the first natural frequency of a layered ground.

引用

页码：1715 / 1722

页数：7

共 7 条

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