Seismic Waveguide of Metamaterials

TL;DR

This paper introduces a novel earthquake-resistant design using acoustic metamaterials to create seismic waveguides that exponentially reduce seismic wave amplitudes, enhancing building protection.

Contribution

It presents a practical method employing cylindrical shell-type waveguides to convert seismic waves into evanescent waves, providing an innovative approach to seismic attenuation.

Findings

Seismic wave amplitude is exponentially reduced by the waveguide.

The method creates a stop-band for seismic waves within specific frequencies.

The design offers a practical and simple solution for earthquake-resistant structures.

Abstract

We have developed a new method of an earthquake-resistant design to support conventional aseismic designs using acoustic metamaterials. We suggest a simple and practical method to reduce the amplitude of a seismic wave exponentially. Our device is an attenuator of a seismic wave. Constructing a cylindrical shell-type waveguide that creates a stop-band for the seismic wave, we convert the wave into an evanescent wave for some frequency range without touching the building we want to protect.