Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

The problem of wave propagation in an irregular ground is crucial when the landform is complex as in the case of Japan. This problem has been studied by a number of researchers; however, most of studies were made from the viewpoint of body wave propagation and only a few dealt with surface waves. The objective of this study is to examine Rayleigh and Love wave propagation in an irregular ground based on the combined method of thin layered element and finite element. In this paper, the following conclusions are made: 1. H/V spectra of a horizontally layered medium as well as the surface wave modes can be obtained based on the thin layered element method. 2. When an incident Rayleigh/Love wave propagates toward an irregular ground, different type of Rayleigh/Love wave modes as well as body waves are generated. 3. In the microtremor wave field due to various incident surface waves, it 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.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

Propagation of Surface Waves in an Irregular Ground Based on the Thin Layered Element and Finite Element Method

San Diego, California

The problem of wave propagation in an irregular ground is crucial when the landform is complex as in the case of Japan. This problem has been studied by a number of researchers; however, most of studies were made from the viewpoint of body wave propagation and only a few dealt with surface waves. The objective of this study is to examine Rayleigh and Love wave propagation in an irregular ground based on the combined method of thin layered element and finite element. In this paper, the following conclusions are made: 1. H/V spectra of a horizontally layered medium as well as the surface wave modes can be obtained based on the thin layered element method. 2. When an incident Rayleigh/Love wave propagates toward an irregular ground, different type of Rayleigh/Love wave modes as well as body waves are generated. 3. In the microtremor wave field due to various incident surface waves, it 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.