Seismic Metashielding by a Line of Resonators Over a Granular Layer

Pierric Mora, Mathieu Chekroun, and Vincent Tournat
Phys. Rev. Applied 16, 044002 – Published 4 October 2021

Abstract

Seismic metamaterials have been the subject of much recent interest, with notable conceptual advances and the demonstration of possible full-scale effectiveness in earthquake protection. Here, through a fine analysis of the dispersion properties and behavior of resonators introduced in a laboratory scale setup, we propose a strategy for the design of an efficient metaseismic barrier. When positioned onto an unconsolidated granular layer, rigid masses of nontrivial shape become elastic resonators by coupling with the relatively soft propagation medium. Additionally, they affect the mechanical boundary conditions and subsurface medium properties through the added weight. We demonstrate that all these ingredients can be rationally combined to improve the shielding effect and control the seismic waves.

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  • Received 22 July 2021
  • Revised 14 September 2021
  • Accepted 16 September 2021

DOI:https://doi.org/10.1103/PhysRevApplied.16.044002

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Pierric Mora*, Mathieu Chekroun, and Vincent Tournat

  • Laboratoire d’Acoustique de l’Université du Mans (LAUM), UMR 6613, Institut d’Acoustique—Graduate School (IA-GS), CNRS, Le Mans Université, France

  • *pierric.mora@univ-eiffel.fr

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Vol. 16, Iss. 4 — October 2021

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