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Low-frequency wide-band-gap seismic metasurface structure containing depleted uranium

A board structure and wide bandgap technology, applied in infrastructure engineering, protective devices, buildings, etc., can solve problems such as narrow bandgap, and achieve the effects of wide frequency range, easy layout, and flexible application

Pending Publication Date: 2021-11-23
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The periodic structure designed based on the principle of local resonance can usually have a structural size two orders of magnitude smaller than the controlled wavelength, which is more suitable for attenuating low-frequency vibrations, but the resulting band gap is usually narrow

Method used

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  • Low-frequency wide-band-gap seismic metasurface structure containing depleted uranium
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  • Low-frequency wide-band-gap seismic metasurface structure containing depleted uranium

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Embodiment Construction

[0031] The present invention is described in detail below in conjunction with the accompanying drawings: the low-frequency wide-bandgap seismic metagrain structure unit cell includes depleted uranium balls (1), rubber layer (2) and soil layer (3).

[0032] Level the site around the building, and excavate the soil 2m away from the building along the circumference of the building to a depth of 0.45m and a length of 4.5m.

[0033] The depleted uranium ball (1) is arranged at the core position, and the depleted uranium ball is a sphere with a radius of 0.15m.

[0034] Afterwards, a rubber layer (2) is coated on the outside of the depleted uranium ball (1) to form a composite ball. The rubber is a hollow sphere with a side length of 0.20m and a thickness of 0.05m.

[0035] In the next step, the soil layer (3) is coated on the outside of the combined sphere to form a structural unit cell of the seismic metaplate. The soil layer (3) is a hollow cube structure with a side length of ...

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Abstract

The invention discloses a low-frequency wide-band-gap seismic metasurface structure containing depleted uranium. The seismic metasurface structure is formed by continuation of seismic metasurface structure unit cells in the same horizontal plane along two mutually perpendicular directions and is designed on the periphery of a building foundation, and each seismic metasurface structure unit cell comprises depleted uranium balls (1), a rubber layer (2) and a soil layer (3). A depleted uranium ball (1) is a ball body, the rubber layer (2) is a hollow ball body, and the soil layer (3) is a hollow cube. The low-frequency wide-band-gap seismic metamaterial structure is located between an earthquake source and a protected building, and when an earthquake occurs and seismic waves reach the designed structure, the seismic waves are attenuated. Therefore, the seismic waves are controlled and attenuated in the seismic wave propagation process, and the purpose of remote control is achieved. According to the low-frequency wide-band-gap seismic metamaterial structure containing the depleted uranium, the seismic metasurface structure is mainly obtained by periodically arranging the structural unit cells, and the structural unit cells are mainly obtained by embedding the depleted uranium balls in soil after wrapping the depleted uranium balls with rubber, so that the structural construction is relatively simple.

Description

technical field [0001] The invention relates to a low-frequency wide-bandgap seismic metagrain structure containing depleted uranium, which is a new structure with good control and attenuation effects on seismic surface waves. Background technique [0002] Earthquakes are among the most catastrophic events known to man, with socioeconomic and environmental impacts. Worldwide, one million earthquakes occur each year, accounting for nearly 60% of all disaster-related mortality. The collapse of buildings causes catastrophic damage to humans during earthquakes. Among them, seismic surface waves have the greatest impact on buildings due to their characteristics of low frequency, high amplitude, difficult attenuation, and long-distance propagation. The frequency of low-frequency surface waves is mainly in the range of 0.1-20Hz, and a large number of earthquake damage shows that the frequency of seismic waves that has the greatest impact on buildings is around 2Hz. When the seis...

Claims

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Application Information

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IPC IPC(8): E02D31/08
CPCE02D31/08
Inventor 石南南亢志宽罗方慧王利辉赵卓
Owner BEIJING UNIV OF TECH
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