Amplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley

A sedimentary valley has a visible amplification effect on a seismic response, and the current 2D topographies cannot truthfully reflect the twists and turns of a large-scale river valley. Taking a sinusoidal curved valley site as a model, the dynamic finite element analysis method and the introduct...

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Autores principales:	Hailiang Wang, Shaomin Yan, Zhongxian Liu, Xinglei Cheng
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/d06a1c9a479046078f704104f8e0416e
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spelling	oai:doaj.org-article:d06a1c9a479046078f704104f8e0416e2021-11-08T02:36:23ZAmplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley1875-920310.1155/2021/6932976https://doaj.org/article/d06a1c9a479046078f704104f8e0416e2021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/6932976https://doaj.org/toc/1875-9203A sedimentary valley has a visible amplification effect on a seismic response, and the current 2D topographies cannot truthfully reflect the twists and turns of a large-scale river valley. Taking a sinusoidal curved valley site as a model, the dynamic finite element analysis method and the introduction of a viscoelastic artificial boundary were developed to study the 3D seismic response of the dimensional topographies in the homogeneous curved valley to vertical incident P, SV, and SH waves. The results showed that the bending sedimentary valley site earthquake presented significant features simultaneously, depending on the number of valley bends, the frequency of the excitations, the shear wave velocity of sedimentary soil, and the depth of the river valley. The surface displacement amplitudes of three-dimensional meandering sedimentary valleys are significantly different from those of sedimentary basins. The amplification area of the meandering valley is related to the angle between the valley axis and wave vibration direction, and the amplification effect is significant when the angle is small. The movement in the main direction showed a center focus, and the secondary y-direction displacement showed both a central focus and an edge effect. When the frequency of the incident wave was close to the natural vibration frequency in a specific direction, the movement in this direction significantly increased because of the resonance effect. The displacement amplitude of the surface was proportional to the depth of the river valley, and the surface displacement was presented in different forms based on the frequency of the excitations. The results provided some guidance for the earthquake resistance of the curved valley site.Hailiang WangShaomin YanZhongxian LiuXinglei ChengHindawi LimitedarticlePhysicsQC1-999ENShock and Vibration, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Hailiang Wang Shaomin Yan Zhongxian Liu Xinglei Cheng Amplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley
description	A sedimentary valley has a visible amplification effect on a seismic response, and the current 2D topographies cannot truthfully reflect the twists and turns of a large-scale river valley. Taking a sinusoidal curved valley site as a model, the dynamic finite element analysis method and the introduction of a viscoelastic artificial boundary were developed to study the 3D seismic response of the dimensional topographies in the homogeneous curved valley to vertical incident P, SV, and SH waves. The results showed that the bending sedimentary valley site earthquake presented significant features simultaneously, depending on the number of valley bends, the frequency of the excitations, the shear wave velocity of sedimentary soil, and the depth of the river valley. The surface displacement amplitudes of three-dimensional meandering sedimentary valleys are significantly different from those of sedimentary basins. The amplification area of the meandering valley is related to the angle between the valley axis and wave vibration direction, and the amplification effect is significant when the angle is small. The movement in the main direction showed a center focus, and the secondary y-direction displacement showed both a central focus and an edge effect. When the frequency of the incident wave was close to the natural vibration frequency in a specific direction, the movement in this direction significantly increased because of the resonance effect. The displacement amplitude of the surface was proportional to the depth of the river valley, and the surface displacement was presented in different forms based on the frequency of the excitations. The results provided some guidance for the earthquake resistance of the curved valley site.
format	article
author	Hailiang Wang Shaomin Yan Zhongxian Liu Xinglei Cheng
author_facet	Hailiang Wang Shaomin Yan Zhongxian Liu Xinglei Cheng
author_sort	Hailiang Wang
title	Amplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley
title_short	Amplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley
title_full	Amplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley
title_fullStr	Amplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley
title_full_unstemmed	Amplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley
title_sort	amplification effect of ground motion in offshore meandering sedimentary valley
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/d06a1c9a479046078f704104f8e0416e
work_keys_str_mv	AT hailiangwang amplificationeffectofgroundmotioninoffshoremeanderingsedimentaryvalley AT shaominyan amplificationeffectofgroundmotioninoffshoremeanderingsedimentaryvalley AT zhongxianliu amplificationeffectofgroundmotioninoffshoremeanderingsedimentaryvalley AT xingleicheng amplificationeffectofgroundmotioninoffshoremeanderingsedimentaryvalley
_version_	1718443140144168960

Amplification Effect of Ground Motion in Offshore Meandering Sedimentary Valley

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