Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation

Feng Ligang; Liu Qifang

doi:doi:10.11648/j.sd.20190703.18

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Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation

Feng Ligang, Liu Qifang

Published in Science Discovery (Volume 7, Issue 3)

Received: 22 April 2019 Published: 15 June 2019

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Abstract

The study of the influence of terrain on ground motion is quantified as the amplification effect of terrain on ground motion. In this paper, we use the spectral element method to simulate the three-dimensional real terrain model, and select the aftershocks of the station ground motion observation records in the Lushan area as the source, and analyze the amplification effect of the three-dimensional topography on the ground motion of the Lushan earthquake in the low frequency range (1-5hz). In this paper, the Fourier model of the real terrain of Lushan and the half-space free model are used to calculate the Fourier amplitude spectrum. The results show that in the low frequency range, the ground fluctuations have a large variation, which will have complex effects on the propagation of seismic waves. Especially in the bulging mountain and depression terrain, the time course peak is large. In addition, this paper selects the mountain near the BXD station from the calculation area, and analyzes the terrain magnifying effect of the convex mountain. Under 2-3hz, the mountain slope near the source side has a magnification effect of 3-4 times.

Published in	Science Discovery (Volume 7, Issue 3)
DOI	10.11648/j.sd.20190703.18
Page(s)	178-181
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2019. Published by Science Publishing Group

Keywords

Three-dimensional Numerical Simulation, Spectral Element Method, Terrain Amplification Effect, Spectrum Ratio

References

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[2]	Komatitsch D, Tromp J. Spectral-element simulations of global seismic wave propagationâI. Validation[J]. Geophysical Journal International, 2002, 149(2):390-412.
[3]	Komatitsch D, Tromp J . Spectral-Element Simulations of Global Seismic Wave Propagation-II. 3-D Models, Oceans, Rotation, and Self-Gravitation[J]. Geophysical Journal of the Royal Astronomical Society, 2002, 150(1):303–318.
[4]	Lee S J, Chen H W, Liu Q, et al. Three-Dimensional Simulations of Seismic-Wave Propagation in the Taipei Basin with Realistic Topography Based upon the Spectral-Element Method [J]. Bulletin of the Seismological Society of America, 2008, 98(1):253-264.
[5]	Assimaki, D. Effects of Local Soil Conditions on the Topographic Aggravation of Seismic Motion: Parametric Investigation and Recorded Field Evidence from the 1999 Athens Earthquake [J]. Bulletin of the Seismological Society of America, 2005, 95(3):1059-1089.
[6]	刘启方, 于彦彦, 章旭斌. 施甸盆地三维地震动研究[J]. 地震工程与工程振动, 2013, 33(04):054-60。
[7]	刘启方, 李雪强, 孙平善. 施甸盆地三维速度结构模型研究[J]. 地震工程与工程振动, 2013, 33(03):088-94。
[8]	刘启方, 李雪强. 唐山大地震近场宽频带地震动模拟[J]. 地震工程与工程振动, 2011, 31(5)。
[9]	张建毅, 薄景山, 王振宇, et al. 汶川地震局部地形对地震动的影响[J]. 自然灾害学报, 2012, 21(03):164-169。
[10]	于彦彦. 三维沉积盆地地震效应研究[J]. 国际地震动态, 2017(6):33-35。
[11]	蒋涵. 三维地形特征与地震动放大系数的相关性研究[D]. 中国地震局地球物理研究所, 2014。
[12]	廖振鹏. 工程波动理论导论[M]. 科学出版社, 2002。
[13]	廖振鹏, 杨柏坡, 袁一凡. 三维地形对地震地面运动的影响[J]. 地震工程与工程振动, 1981(1):59-80。
[14]	吕坚, 王晓山, 苏金蓉, et al. 芦山7.0级地震序列的震源位置与震源机制解特征[J]. 地球物理学报, 2013, 56(5):1753-1763。

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APA Style

Feng Ligang, Liu Qifang. (2019). Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation. Science Discovery, 7(3), 178-181. https://doi.org/10.11648/j.sd.20190703.18

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ACS Style

Feng Ligang; Liu Qifang. Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation. Sci. Discov. 2019, 7(3), 178-181. doi: 10.11648/j.sd.20190703.18

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AMA Style

Feng Ligang, Liu Qifang. Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation. Sci Discov. 2019;7(3):178-181. doi: 10.11648/j.sd.20190703.18

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@article{10.11648/j.sd.20190703.18,
  author = {Feng Ligang and Liu Qifang},
  title = {Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation},
  journal = {Science Discovery},
  volume = {7},
  number = {3},
  pages = {178-181},
  doi = {10.11648/j.sd.20190703.18},
  url = {https://doi.org/10.11648/j.sd.20190703.18},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20190703.18},
  abstract = {The study of the influence of terrain on ground motion is quantified as the amplification effect of terrain on ground motion. In this paper, we use the spectral element method to simulate the three-dimensional real terrain model, and select the aftershocks of the station ground motion observation records in the Lushan area as the source, and analyze the amplification effect of the three-dimensional topography on the ground motion of the Lushan earthquake in the low frequency range (1-5hz). In this paper, the Fourier model of the real terrain of Lushan and the half-space free model are used to calculate the Fourier amplitude spectrum. The results show that in the low frequency range, the ground fluctuations have a large variation, which will have complex effects on the propagation of seismic waves. Especially in the bulging mountain and depression terrain, the time course peak is large. In addition, this paper selects the mountain near the BXD station from the calculation area, and analyzes the terrain magnifying effect of the convex mountain. Under 2-3hz, the mountain slope near the source side has a magnification effect of 3-4 times.},
 year = {2019}
}

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TY  - JOUR
T1  - Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation
AU  - Feng Ligang
AU  - Liu Qifang
Y1  - 2019/06/15
PY  - 2019
N1  - https://doi.org/10.11648/j.sd.20190703.18
DO  - 10.11648/j.sd.20190703.18
T2  - Science Discovery
JF  - Science Discovery
JO  - Science Discovery
SP  - 178
EP  - 181
PB  - Science Publishing Group
SN  - 2331-0650
UR  - https://doi.org/10.11648/j.sd.20190703.18
AB  - The study of the influence of terrain on ground motion is quantified as the amplification effect of terrain on ground motion. In this paper, we use the spectral element method to simulate the three-dimensional real terrain model, and select the aftershocks of the station ground motion observation records in the Lushan area as the source, and analyze the amplification effect of the three-dimensional topography on the ground motion of the Lushan earthquake in the low frequency range (1-5hz). In this paper, the Fourier model of the real terrain of Lushan and the half-space free model are used to calculate the Fourier amplitude spectrum. The results show that in the low frequency range, the ground fluctuations have a large variation, which will have complex effects on the propagation of seismic waves. Especially in the bulging mountain and depression terrain, the time course peak is large. In addition, this paper selects the mountain near the BXD station from the calculation area, and analyzes the terrain magnifying effect of the convex mountain. Under 2-3hz, the mountain slope near the source side has a magnification effect of 3-4 times.
VL  - 7
IS  - 3
ER  -

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Author Information

Feng Ligang

Institute of Engineering Mechanics, China Earthquake Administration, Harbin, China
Liu Qifang

Institute of Engineering Mechanics, China Earthquake Administration, Harbin, China

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Plain Text BibTeX RIS

APA Style

Feng Ligang, Liu Qifang. (2019). Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation. Science Discovery, 7(3), 178-181. https://doi.org/10.11648/j.sd.20190703.18

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ACS Style

Feng Ligang; Liu Qifang. Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation. Sci. Discov. 2019, 7(3), 178-181. doi: 10.11648/j.sd.20190703.18

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AMA Style

Feng Ligang, Liu Qifang. Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation. Sci Discov. 2019;7(3):178-181. doi: 10.11648/j.sd.20190703.18

Copy | Download

@article{10.11648/j.sd.20190703.18,
  author = {Feng Ligang and Liu Qifang},
  title = {Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation},
  journal = {Science Discovery},
  volume = {7},
  number = {3},
  pages = {178-181},
  doi = {10.11648/j.sd.20190703.18},
  url = {https://doi.org/10.11648/j.sd.20190703.18},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20190703.18},
  abstract = {The study of the influence of terrain on ground motion is quantified as the amplification effect of terrain on ground motion. In this paper, we use the spectral element method to simulate the three-dimensional real terrain model, and select the aftershocks of the station ground motion observation records in the Lushan area as the source, and analyze the amplification effect of the three-dimensional topography on the ground motion of the Lushan earthquake in the low frequency range (1-5hz). In this paper, the Fourier model of the real terrain of Lushan and the half-space free model are used to calculate the Fourier amplitude spectrum. The results show that in the low frequency range, the ground fluctuations have a large variation, which will have complex effects on the propagation of seismic waves. Especially in the bulging mountain and depression terrain, the time course peak is large. In addition, this paper selects the mountain near the BXD station from the calculation area, and analyzes the terrain magnifying effect of the convex mountain. Under 2-3hz, the mountain slope near the source side has a magnification effect of 3-4 times.},
 year = {2019}
}

Copy | Download

TY  - JOUR
T1  - Low-frequency Topographic Amplification Effect of Lushan Earthquake Based on Three-dimensional Numerical Simulation
AU  - Feng Ligang
AU  - Liu Qifang
Y1  - 2019/06/15
PY  - 2019
N1  - https://doi.org/10.11648/j.sd.20190703.18
DO  - 10.11648/j.sd.20190703.18
T2  - Science Discovery
JF  - Science Discovery
JO  - Science Discovery
SP  - 178
EP  - 181
PB  - Science Publishing Group
SN  - 2331-0650
UR  - https://doi.org/10.11648/j.sd.20190703.18
AB  - The study of the influence of terrain on ground motion is quantified as the amplification effect of terrain on ground motion. In this paper, we use the spectral element method to simulate the three-dimensional real terrain model, and select the aftershocks of the station ground motion observation records in the Lushan area as the source, and analyze the amplification effect of the three-dimensional topography on the ground motion of the Lushan earthquake in the low frequency range (1-5hz). In this paper, the Fourier model of the real terrain of Lushan and the half-space free model are used to calculate the Fourier amplitude spectrum. The results show that in the low frequency range, the ground fluctuations have a large variation, which will have complex effects on the propagation of seismic waves. Especially in the bulging mountain and depression terrain, the time course peak is large. In addition, this paper selects the mountain near the BXD station from the calculation area, and analyzes the terrain magnifying effect of the convex mountain. Under 2-3hz, the mountain slope near the source side has a magnification effect of 3-4 times.
VL  - 7
IS  - 3
ER  -

Copy | Download