A Mesh Grading Technique for Near-fault Seismic Wave Propagation in Large Velocity-contrast Viscoelastic Earth Media

A Mesh Grading Technique for Near-fault Seismic Wave Propagation in Large Velocity-contrast Viscoelastic Earth Media
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大速度对比粘弹性地球介质中近断层地震波传播的网格分级技术

DOI:
10.1080/13632469.2020.1719240
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发表时间:
2020-02
影响因子:
2.6
通讯作者:
Tielin Liu
Tielin Liu
中科院分区:
工程技术3区
文献类型:
--
作者:
Wei Zhong;Tielin Liu

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场地地震地震动受附近非均质性强、界面不规则、地形起伏、衰减大等多种因素影响较大。为了考虑这些因素,提出了一种简单的三角网格分级技术,用于有效模拟具有崎岖地形的大速度对比地球介质的不规则界面上的粘弹性波双向传播。对 Mw 5.2 假设地震的有限断层震源的地面运动进行了模拟。模拟结果表明,土盆和夹层的存在对地震动影响较大,在研究地震动时应予以考虑。
Seismic ground motions at a site are greatly affected by nearby many factors, such as strong heterogeneity, irregular interface, topographic relief, and large attenuation. To consider such factors, a simple triangular mesh grading technique is proposed for the efficient simulation of viscoelastic wave bidirectional propagation at irregular interface of large velocity-contrast earth media with rugged topography. The ground motions from finite-fault seismic source of a Mw 5.2 hypothetical earthquake are simulated. The simulation results showed that the existence of soil basin and interlayer can impact greatly ground motions, and should be considered in studying ground motions.
DOI: --
发表时间: 1978-10
影响因子: 3
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