Volume 127, Number 1, July 2019
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||12 August 2019|
Broadband H-shaped seismic metamaterial with a rubber coating
1 School of Mathematics and Physics, China University of Geosciences - Wuhan 430074, China
2 School of Civil Engineering and Mechanics, Huazhong University of Science and Technology - Wuhan 430074, China
Received: 2 April 2019
Accepted: 3 July 2019
The enormous disasters caused by an earthquake force defensive structures to attenuate the effects of seismic waves on buildings. In this paper, to attenuate seismic waves, we propose a low-frequency seismic metamaterial consisting of H-shaped steel columns wrapped with rubber, which can possess a wide band gap with a relative ratio of 67.6%. The vibrational modes are explored to clarify the generation mechanism of band gap. The transmission coefficients of waves propagation in different directions are computed to confirm the efficiency of attenuating seismic waves. Finally, the dependence of the band gap on the geometric parameters is reported.
PACS: 78.67.Pt – Multilayers; superlattices; photonic structures; metamaterials / 81.05.Xj – Metamaterials for chiral, bianisotropic and other complex media / 74.25.Ld – Mechanical and acoustical properties, elasticity, and ultrasonic attenuation
© EPLA, 2019
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