CN215857887U - Semi-buried seismic metamaterial barrier structure - Google Patents
Semi-buried seismic metamaterial barrier structure Download PDFInfo
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- CN215857887U CN215857887U CN202122408684.7U CN202122408684U CN215857887U CN 215857887 U CN215857887 U CN 215857887U CN 202122408684 U CN202122408684 U CN 202122408684U CN 215857887 U CN215857887 U CN 215857887U
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- 230000004888 barrier function Effects 0.000 title claims abstract description 31
- 239000002689 soil Substances 0.000 claims abstract description 14
- 239000004794 expanded polystyrene Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000013016 damping Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 4
- 210000002457 barrier cell Anatomy 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
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Abstract
The utility model discloses a semi-embedded seismic metamaterial barrier structure, which comprises a plurality of barrier unit cells which are arranged according to a square lattice period; the barrier unit cell comprises an inner cylinder, an outer circular cylinder is sleeved outside the inner cylinder, a gap is formed between the inner cylinder and the outer circular cylinder, and an intermediate connection cylinder is arranged in the gap. The external circular cylinder is half-buried in the soil, so that the stability of the structure is enhanced, and the ultra-low frequency band gap characteristic is achieved. The composite material can be used for damping Rayleigh waves and effectively protecting important buildings.
Description
Technical Field
The utility model belongs to the field of building earthquake resistance, and particularly relates to a semi-embedded type earthquake metamaterial barrier structure.
Background
When an earthquake occurs, seismic waves carry a large amount of energy to propagate from a seismic source to the periphery, and when the seismic waves reach the soil surface, the seismic waves propagate along the soil surface to form surface waves. The low-frequency vibration generated by the surface wave is extremely harmful to the building, and particularly, the rayleigh wave in the surface wave is a main component for destroying the building.
The traditional shock insulation mode is to arrange an energy dissipation system for a building structure, so that the effect of protecting a building by attenuating seismic waves is achieved. This approach has certain drawbacks, only protecting a single structure and not protecting a range of areas, and it also has certain impact on the life of the building.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a semi-embedded seismic metamaterial barrier structure which can attenuate and inhibit seismic waves and is arranged around a building so as to protect the building from being damaged by Rayleigh waves.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a semi-embedded seismic metamaterial barrier structure comprises a plurality of barrier unit cells which are arranged according to a square lattice period; the barrier unit cell comprises an inner cylinder, an outer circular cylinder is sleeved outside the inner cylinder, a gap is formed between the inner cylinder and the outer circular cylinder, and an intermediate connection cylinder is arranged in the gap.
Furthermore, the height of the inner cylinder is the same as that of the middle connecting cylinder, and the height of the outer circular cylinder is larger than that of the inner cylinder and that of the middle connecting cylinder.
Furthermore, the first end of inside cylinder, the first end of intermediate junction cylinder and the first end of outside ring shape cylinder flush, the second end of outside ring shape cylinder buries in soil.
Further, the height of the outer circular cylinder is twice the height of the inner cylinder.
Furthermore, half of the height of the external circular cylinder is buried in the soil.
Further, the outer diameter of the outer circular cylinder is 2.4m, the inner diameter is 2m, and the height is 6 m; the outer diameter of the middle connecting cylinder is 2m, the inner diameter of the middle connecting cylinder is 1m, and the height of the middle connecting cylinder is 3 m; the inner cylinder has a diameter of 1m and a height of 3 m.
Further, the external circular cylinder is a concrete cylinder; the inner cylinder is a concrete cylinder.
Further, the material parameters of the concrete are as follows: young's modulus E1=4×1010Pa, Poisson ratio μ1Density ρ =0.21=2500kg/m3。
Furthermore, the middle connecting column body is made of expanded polystyrene filled in the gap between the inner cylinder body and the outer circular column body.
Further, the material parameters of the expanded polystyrene are as follows: young's modulus E2=1.34×105Pa, Poisson ratio μ2Density ρ =0.132=12kg/m3。
Compared with the prior art, the utility model has the following beneficial effects:
(1) according to the semi-embedded seismic metamaterial barrier structure provided by the embodiment of the utility model, the external circular cylinder is semi-embedded in the soil, so that the stability of the structure is enhanced, and the semi-embedded seismic metamaterial barrier structure has the characteristic of ultralow frequency band gap. Can be used for damping Rayleigh waves and effectively protecting important buildings
(2) The band gaps of different frequency bands can be obtained by adjusting the embedding depth of the external circular cylinder and the diameter of the internal cylinder, so that a new way is provided for shock absorption and shock isolation.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic perspective view of a barrier cell according to an embodiment of the present invention.
FIG. 2 is a top view of a barrier cell in an embodiment of the utility model.
FIG. 3 is a front view of a barrier cell in an embodiment of the utility model.
Fig. 4 is a schematic arrangement diagram of a semi-buried seismic metamaterial barrier structure provided by an embodiment of the utility model.
Wherein: 1, an external circular cylinder; 2, connecting a cylinder in the middle; 3 an inner cylinder; 4, 4 soil.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the utility model. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the utility model.
The embodiment of the utility model provides a semi-embedded seismic metamaterial barrier structure which is periodically arranged around a building, can effectively attenuate Rayleigh waves, and not only enhances the stability of the structure, but also has the characteristic of ultralow frequency band gap through a semi-embedded mode. Therefore, the earthquake wave energy is effectively attenuated and controlled, and the building is prevented from being damaged by the earthquake.
As shown in fig. 1 to 4, a semi-embedded seismic metamaterial barrier structure includes a plurality of barrier unit cells arranged according to a square lattice period; the barrier unit cell comprises an inner cylinder 3, an outer circular cylinder 1 is sleeved outside the inner cylinder 3, a gap is formed between the inner cylinder 3 and the outer circular cylinder 1, and an intermediate connection cylinder 2 is arranged in the gap.
In a particular embodiment of the utility model, the internal cylinder 3 and the intermediate connecting cylinder 2 have the same height, the external cylindrical ring 1 having a height greater than the height of the internal cylinder 3 and the intermediate connecting cylinder 2. The first end of the internal cylinder 3, the first end of the intermediate connection cylinder 2 and the first end of the external circular cylinder 1 are flush, the second end of the external circular cylinder 1 is buried in the soil, and the intermediate connection cylinder 2 and the internal cylinder 3 are not buried in the soil. Specifically, the height of the outer cylindrical body 1 is twice the height of the inner cylindrical body 3, and half of the height of the outer cylindrical body 1 is buried in the soil.
As a preferred embodiment of the present invention, the outer circular cylindrical body 1 has an outer diameter of 2.4m, an inner diameter of 2m, and a height of 6 m; the outer diameter of the middle connecting column body 2 is 2m, the inner diameter is 1m, and the height is 3 m; the inner cylinder 3 has a diameter of 1m and a height of 3 m. The soil 4 size is: 2.5m long, 2.5m wide and 40m high.
As an example, the outer circular cylindrical body 1 in the present embodiment is a concrete cylinder, and the inner cylindrical body 3 is a concrete cylinder; the material parameters of the concrete are as follows: young's modulus E1=4×1010Pa, Poisson ratio μ1Density ρ =0.21=2500kg/m3. The soil parameters are as follows: young's modulus E3=2×107Pa, Poisson ratio μ3=0.3 and density ρ3=1800kg/m3. The intermediate connecting column 2 is expanded polystyrene filled in the gap between the inner cylinder 3 and the outer circular column 1. The material parameters of the expanded polystyrene are as follows: young's modulus E2=1.34×105Pa, Poisson ratio μ2Density ρ =0.132=12kg/m3。
The semi-embedded seismic metamaterial barrier structure provided by the embodiment of the utility model generates two complete band gaps below 20Hz, wherein the first band gap is 4.2Hz-11.4 Hz; the second band gap is 12.1Hz-13.1Hz, and the total width of the band gap is 8.2 Hz. Therefore, by adopting the semi-embedded seismic metamaterial barrier structure, the stability of the structure is enhanced, and an ultralow-frequency broadband band gap can be generated. Therefore, the semi-embedded seismic metamaterial structure can be used for damping Rayleigh waves and effectively protecting important buildings.
It will be appreciated by those skilled in the art that the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the utility model are intended to be embraced therein.
Claims (10)
1. A semi-buried seismic metamaterial barrier structure is characterized by comprising a plurality of barrier unit cells which are arranged according to a square lattice period; the barrier unit cell comprises an inner cylinder (3), an outer circular cylinder body (1) is sleeved outside the inner cylinder (3), a gap is arranged between the inner cylinder (3) and the outer circular cylinder body (1), and an intermediate connection cylinder body (2) is arranged in the gap.
2. Semi-submerged seismic metamaterial barrier structure according to claim 1, characterized in that the inner cylinder (3) and the intermediate connection cylinder (2) have the same height, the outer circular cylinder (1) having a height greater than the height of the inner cylinder (3) and the intermediate connection cylinder (2).
3. Semi-submerged seismic metamaterial barrier structure according to claim 2, characterized in that the first end of the inner cylinder (3), the first end of the intermediate connection cylinder (2) and the first end of the outer circular cylinder (1) are flush, the second end of the outer circular cylinder (1) being buried in the soil.
4. Semi-submerged seismic metamaterial barrier structure according to claim 3, characterized in that the height of the outer circular cylindrical body (1) is twice the height of the inner cylindrical body (3).
5. Semi-submerged seismic metamaterial barrier structure according to claim 4, characterized in that the outer circular cylindrical body (1) is half height submerged in the soil.
6. Semi-submerged seismic metamaterial barrier structure according to claim 5, characterized in that the outer circular cylindrical body (1) has an outer diameter of 2.4m, an inner diameter of 2m and a height of 6 m; the outer diameter of the middle connecting column body (2) is 2m, the inner diameter is 1m, and the height is 3 m; the inner cylinder (3) has a diameter of 1m and a height of 3 m.
7. Semi-submerged seismic metamaterial barrier structure according to claim 1, wherein the outer circular cylindrical body (1) is a concrete cylinder; the inner cylinder (3) is a concrete cylinder.
8. The semi-submerged seismic metamaterial barrier structure of claim 7, wherein the concrete has material parameters of: young's modulus E1=4×1010Pa, Poisson ratio μ1Density ρ =0.21=2500kg/m3。
9. Semi-submerged seismic metamaterial barrier structure according to claim 1, characterized in that the intermediate connection columns (2) are expanded polystyrene filled in the gap between the inner cylinder (3) and the outer circular cylinder (1).
10. The semi-submerged seismic metamaterial barrier structure of claim 9, wherein the expanded polystyrene has material parameters of: young's modulus E2=1.34×105Pa, Poisson ratio μ2Density ρ =0.132=12kg/m3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122408684.7U CN215857887U (en) | 2021-09-28 | 2021-09-28 | Semi-buried seismic metamaterial barrier structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122408684.7U CN215857887U (en) | 2021-09-28 | 2021-09-28 | Semi-buried seismic metamaterial barrier structure |
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| Publication Number | Publication Date |
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| CN215857887U true CN215857887U (en) | 2022-02-18 |
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| CN202122408684.7U Expired - Fee Related CN215857887U (en) | 2021-09-28 | 2021-09-28 | Semi-buried seismic metamaterial barrier structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114606989A (en) * | 2022-04-20 | 2022-06-10 | 华东交通大学 | Negative Poisson ratio-local resonance shock isolation structure and resonator |
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2021
- 2021-09-28 CN CN202122408684.7U patent/CN215857887U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114606989A (en) * | 2022-04-20 | 2022-06-10 | 华东交通大学 | Negative Poisson ratio-local resonance shock isolation structure and resonator |
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