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Low-frequency damping square nine-hole pile earthquake meta-structure

An ultra-smart, square-shaped technology, applied in foundation structure engineering, sheet pile walls, buildings, etc., can solve the problems of poor active control stability, many influencing factors, difficulty in controlling and isolating low-frequency surface waves, etc. simple effect

Active Publication Date: 2021-03-26
BEIJING UNIV OF TECH
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  • Summary
  • 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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  • Low-frequency damping square nine-hole pile earthquake meta-structure
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  • Low-frequency damping square nine-hole pile earthquake meta-structure

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Embodiment Construction

[0032] The present invention is described in detail below in conjunction with accompanying drawing: low-frequency shock-absorbing square nine hole pile earthquake superstructure comprises the first hollow steel pipe (1), the second hollow steel pipe (2), the 3rd hollow steel pipe (3), the 4th hollow steel pipe ( 4), the 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 concrete layer (11).

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

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Abstract

The invention discloses a low-frequency damping square nine-hole pile earthquake meta-structure. The earthquake meta-structure is mainly composed of a thin-wall steel pipe, a rubber column and a concrete layer, and is simple in structural construction. Arrangement of the designed earthquake meta-structure can be arranged in a segmented and circumferential mode along a building according to the site environment and geological conditions of the building, and the building is fully and effectively protected. The earthquake meta-structure is a periodic structure designed based on the phononic crystal theory, and has a band gap characteristic. When earthquake surface waves come, the earthquake surface waves in a band gap range cannot pass through the designed structure. The earthquake meta-structure is arranged around a building and is not connected with the building, and can shield earthquake surface waves remotely, thereby protecting the building. The earthquake meta-structure is not directly connected with the building and is arranged outside the building at a certain distance from the building, therefore, under a large earthquake, the deformation of the earthquake meta-structure doesnot influence the structure; and meanwhile, the earthquake meta-structure can effectively attenuate earthquake surface waves in a full-band-gap range and protect the building.

Description

technical field [0001] The invention relates to a low-frequency shock-absorbing square nine-hole pile seismic superstructure, 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 focus, wide distribution, high frequency, and high intensity. It is a country with severe earthquake disasters. The loss 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 produced by earthquakes, among which the seismic surface waves have the greatest damage 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 damage shows that the peak spectrum of the seismic wave that causes the destr...

Claims

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Application Information

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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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