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A low-frequency shock-absorbing square nine-hole pile seismic metastructure

A square, ultra-intelligent technology, applied in foundation structure engineering, sheet pile walls, buildings, etc., can solve problems such as difficulty in controlling and isolating low-frequency surface waves, poor active control stability, poor broadband shock absorption effect, etc., and achieves simple structure , Simple structure, easy to obtain effect

Active Publication Date: 2022-07-15
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability of active control is poor and there are many influencing factors, which is not effective for broadband shock absorption
However, semi-active control has strong limitations
Also, this seismic method is difficult to control and isolate low-frequency surface waves

Method used

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  • A low-frequency shock-absorbing square nine-hole pile seismic metastructure
  • A low-frequency shock-absorbing square nine-hole pile seismic metastructure
  • A low-frequency shock-absorbing square nine-hole pile seismic metastructure

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings: The seismic meta-structure of the low-frequency shock-absorbing square nine-hole pile includes a first hollow steel pipe 1, a second hollow steel pipe 2, a third hollow steel pipe 3, a fourth hollow steel pipe 4, and a fifth hollow steel pipe 5. , the sixth hollow steel pipe 6, the seventh hollow steel pipe 7, the eighth hollow steel pipe 8, the ninth hollow steel pipe 9, the rubber column 10 and the concrete layer 11.

[0033] First, install a rubber column with a reserved hole, and the size of the reserved hole is 2cm larger than the cross-sectional area of ​​the square steel pipe column. Taking the interface centroid of the rubber column as the center, a coordinate system is established at the section, and the reserved holes are from top to bottom. The coordinates of the center positions of the three holes in the first row are: (-0.5m, 0.5m) (0, 0.5m) (0.5m, 0.5m); ...

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Abstract

The invention discloses a low-frequency shock-absorbing square nine-hole pile seismic metastructure. The seismic metastructure is mainly composed of a thin-walled steel pipe, a rubber column and a concrete layer. The structure is simple. The layout of the designed seismic metastructure can be arranged in sections and in the circumferential direction of the building according to the site environment and geological conditions where the building is located, so as to fully and effectively protect the building. The structure of the present invention is a periodic structure designed based on the phononic crystal theory and has band gap characteristics. When the seismic surface wave strikes, the seismic surface wave in the band gap range will not be able to pass through the designed structure. Arranged around the building and not connected to the building, it can remotely shield the seismic surface wave to protect the building. The seismic metastructure designed by the present invention is not directly connected with the building, and is arranged outside the building with a certain distance from the building. Therefore, under large earthquakes, the deformation of the seismic metastructure will not affect the structure. At the same time, the seismic metastructure can effectively attenuate the seismic surface waves in the whole bandgap range and protect the building.

Description

technical field [0001] The invention relates to a low-frequency shock-absorbing square nine-hole pile seismic metastructure, which is a new structure capable of effectively controlling and attenuating seismic surface waves. Background technique [0002] Earthquake activity in my country is characterized by shallow epicenter, wide distribution, high frequency and high intensity. It is a country with severe earthquake disasters. The damage caused by the earthquake is mainly due to the collapse of buildings, which may cause property damage and casualties. There are many types of seismic waves generated by earthquakes, among which the seismic surface waves are the most damaging to structures. Surface waves have the characteristics of low frequency, high amplitude and difficult attenuation. Common control methods are difficult to control and attenuate seismic surface waves. A large number of earthquake damages show that the peak frequency spectrum of seismic waves causing damag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/22E02D31/08
CPCE02D5/22E02D31/08
Inventor 石南南亢志宽罗方慧王利辉赵卓
Owner BEIJING UNIV OF TECH
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