Special Issue "Seismic Metamaterials"

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Acoustics and Vibrations".

Deadline for manuscript submissions: closed (31 December 2018).

Special Issue Editors

Dr. Sebastien Guenneau
E-Mail Website
Guest Editor
Institut Fresnel, Aix-Marseille University, CNRS, F13397 Marseille cedex 20, France
Interests: metamaterials; waves; asymptotic methods; finite elements
Prof. Dr. Stéphane Brûlé
E-Mail Website
Co-Guest Editor
Rhone-Alpes Branch of Menard company
Interests: metamaterials; soil dynamics; earthquake engineering

Special Issue Information

Dear Colleagues,

Seismic metamaterials is an emerging topic at the interface between three communities: researchers working on the control of electromagnetic, acoustic, and elastodynamic waves, geophysicists, and civil engineers. This Special Issue aims at bridging these three disciplines together to provide a survey of recent progress on the control of seismic waves in structured soils.

Dr. Sebastien Guenneau
Prof. Stéphane Brûlé
Guest Editors

Manuscript Submission Information

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Keywords

  • Metamaterials

  • Waves

  • Soil dynamics

  • Cloaking

  • Homogenization

  • Computational geophysics

Published Papers (3 papers)

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Research

Open AccessArticle
Surface-Wave Extraction Based on Morphological Diversity of Seismic Events
Appl. Sci. 2019, 9(1), 17; https://doi.org/10.3390/app9010017 - 21 Dec 2018
Abstract
It is essential to extract high-fidelity surface waves in surface-wave surveys. Because reflections usually interfere with surface waves on X components in multicomponent seismic exploration, it is difficult to extract dispersion curves of surface waves. To make matters worse, the frequencies and velocities [...] Read more.
It is essential to extract high-fidelity surface waves in surface-wave surveys. Because reflections usually interfere with surface waves on X components in multicomponent seismic exploration, it is difficult to extract dispersion curves of surface waves. To make matters worse, the frequencies and velocities of higher-mode surface waves are close to those of PS-waves. A method for surface-wave extraction is proposed based on the morphological differences between surface waves and reflections. Frequency-domain high-resolution linear Radon transform (LRT) and time-domain high-resolution hyperbolic Radon transform (HRT) are used to represent surface waves and reflections, respectively. Then, a sparse representation problem based on morphological component analysis (MCA) is built and optimally solved to obtain high-fidelity surface waves. An advantage of our method is its ability to extract surface waves when their frequencies and velocities are close to those of reflections. Furthermore, the results of synthetic and field examples confirm that the proposed method can attenuate the distortion of surface-wave dispersive energy caused by reflections, which contributes to extraction of accurate dispersion curves. Full article
(This article belongs to the Special Issue Seismic Metamaterials)
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Open AccessArticle
Seismic Analysis of Steel Solid Web Girder-RC Tubular Column Hybrid Structure
Appl. Sci. 2018, 8(11), 2095; https://doi.org/10.3390/app8112095 - 31 Oct 2018
Cited by 1
Abstract
This paper aims to investigate the seismic performance of a novel type of steel–concrete hybrid supporting structure consisting of reinforced concrete (RC) tubular columns, steel solid web girder platform, and A-shaped steel frames. It is typically used to house air-cooled condensers (ACC) in [...] Read more.
This paper aims to investigate the seismic performance of a novel type of steel–concrete hybrid supporting structure consisting of reinforced concrete (RC) tubular columns, steel solid web girder platform, and A-shaped steel frames. It is typically used to house air-cooled condensers (ACC) in thermal power plants (TPPs). First, the finite-element (FE) model was implemented in ABAQUS and the simulation approaches were validated by pseudo-dynamic test results of a scaled steel-concrete hybrid supporting structure. Then, the elasto-plastic time-history analysis of the steel solid web girder-RC tubular column hybrid structure was conducted. The El Centro (NS) record was scaled to peak ground acceleration (PGA) of 0.07, 0.20, 0.40 and 0.62 g to reflect the frequent, basic, rare, and very rare earthquakes. The dynamic characteristics, base shear force, lateral deformation performance, stiffness deterioration, and damage evolution characteristics were analyzed. The numerical results showed that the first vibration mode of this hybrid structure is torsion, due to its small torsional stiffness and the nonuniform distribution characteristics of stiffness and mass in the vertical direction; the lateral deformation shape is shear mode; and the damage mainly occurred on the RC tubular columns, while the steel components did not yield under severe earthquakes. In general, the overall seismic performance of the steel solid web girder-RC tubular column hybrid structural system could meet the seismic design requirements with respect to the high-intensity earthquakes. Full article
(This article belongs to the Special Issue Seismic Metamaterials)
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Open AccessArticle
Geo-Proxy-Based Site Classification for Regional Zonation of Seismic Site Effects in South Korea
Appl. Sci. 2018, 8(2), 314; https://doi.org/10.3390/app8020314 - 24 Feb 2018
Cited by 2
Abstract
Seismic site effects and topographic effects related to ground motion occur during an earthquake due to site-specific geotechnical or geological characteristics, including the geological or geographical structure and the characteristics of near-surface sub-soil layers. Site-specific site effects due to geological conditions have been [...] Read more.
Seismic site effects and topographic effects related to ground motion occur during an earthquake due to site-specific geotechnical or geological characteristics, including the geological or geographical structure and the characteristics of near-surface sub-soil layers. Site-specific site effects due to geological conditions have been confirmed in recent earthquake events. Earthquake-induced damage has mainly occurred at accumulated soft soil layers under basins or along coasts and rivers. An alternative method has recently been proposed for evaluating regional seismic site effects and amplification factors using digital elevation models (DEM). High-quality DEMs at high resolutions may be employed to resolve finer-scale variations in topographic gradients and consequently, correlated site response parameters. Because there are many regions in South Korea lacking borehole datasets, which are insufficient for site classification only using borehole datasets, a DEM-based proxy for seismic zonation can be effective. Thus, in this study, geo-proxy-based site classification was proposed based on empirical correlations with site response parameters and conducted for regional zonation of seismic site effects to identify the amplification of characteristics in the western metropolitan areas of South Korea, depending on the site-specific geo-spatial conditions. Full article
(This article belongs to the Special Issue Seismic Metamaterials)
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