Simulation and Analysis of Microtremor H/V Spectrum Based on the Surface Wave Propagation Theory in Layered Half-Space

DOI

10.2991/aebmr.k.210409.017How to use a DOI?

Keywords

Velocity structure, Microtremor Surface wave H/V spectrum, Microtremor loading source, Simulation and analysis

Abstract

Subsurface velocity structures can be constructed via an inversion of the horizontal-to-vertical (H/V) spectral ratio of microtremor (MHV) curves, as a result, a method of simulating the MHV curves is key. In this study, we use the H/V spectral ratio of the surface wave (SHV) based on the surface wave propagation theory in layered half-space to simulate the MHV curves at sites A and B of the Yuxi basin. Then, we attempt to analyse the characteristics of the SHV curves. We find the H/V ratio of the microtremor loading source to be independent of the predominant frequency of the SHV curve, but it has some relation to the amplitude of the SHV curve. Moreover, to reduce the error in subsurface velocity structures obtained by the MHV curves, we suggest that the SHV curves at near-predominant frequencies should not be considered in the inversion, because the amplitude deviation is higher at the predominant frequency of the MHV curve.

Copyright

© 2021, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xueliang Chen
AU  - Zhen Zhang
AU  - Mengtan Gao
PY  - 2021
DA  - 2021/04/12
TI  - Simulation and Analysis of Microtremor H/V Spectrum Based on the Surface Wave Propagation Theory in Layered Half-Space
BT  - Proceedings of the 9th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention (RAC 2020)
PB  - Atlantis Press
SP  - 109
EP  - 114
SN  - 2352-5428
UR  - https://doi.org/10.2991/aebmr.k.210409.017
DO  - 10.2991/aebmr.k.210409.017
ID  - Chen2021
ER  -