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Towards Earthquake Shields: A Numerical Investigation of Earthquake Shielding with Seismic Crystals
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Open Journal of Acoustics·Volume 01 (2011)·Pages 63–69·Published 28 December 2011·DOI10.4236/oja.2011.13008
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Abstract
Authors numerically demonstrate that the seismic surface waves from an earthquake can be attenuated by a seismic crystal structure constructed on the ground. In the study, seismic crystals with a lattice constant of kilometer are investigated in the aspect of band gaps (Stop band), and some design considerations for earthquake shielding are discussed for various crystal configurations in a theoretical manner. Authors observed in their FDTD based 2D wave simulation results that the proposed earthquake shield can provide a decreasing in magnitude of surface seismic waves. Such attenuation of seismic waves might reduce the damage in an earthquake.
KeywordsEarthquake ShieldingSeismic MetamaterialsSeismic Wave AttenuationBand Gap Analysis
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