CN112227177A - Periodic box girder structure with vibrators arranged on diaphragm plate - Google Patents
Periodic box girder structure with vibrators arranged on diaphragm plate Download PDFInfo
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- CN112227177A CN112227177A CN202011183929.4A CN202011183929A CN112227177A CN 112227177 A CN112227177 A CN 112227177A CN 202011183929 A CN202011183929 A CN 202011183929A CN 112227177 A CN112227177 A CN 112227177A
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- plate
- box
- webs
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- top plate
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- Vibration Prevention Devices (AREA)
Abstract
The invention relates to a periodic box girder structure with vibrators arranged on diaphragm plates, which comprises a plurality of basic units, wherein each basic unit comprises a top plate and a bottom plate, two webs are arranged between the top plate and the bottom plate, and the top plate, the webs, the bottom plate and the webs are sequentially connected to form a box-type structure; a transverse partition plate is inserted in the box-type structure to separate the interior of the box-type structure into two spaces; at least one vibrator is arranged on the diaphragm plate, and each vibrator is embedded on the diaphragm plate in a covering manner through elastic light filler; the box-type structure is along the direction perpendicular to the cross sectionzThe crystal can be regarded as a local resonance type phononic crystal after being extended into a periodic box girder, has an elastic wave band gap, and can be used for damping vibration of building structures such as bridges and the like.
Description
Technical Field
The invention relates to a periodic box girder structure with vibrators arranged on a diaphragm plate, and belongs to the field of vibration reduction.
Background
The phononic crystal theory originates from the field of condensed solid physics, attracts the attention of a plurality of scholars in the development process of nearly 30 years, and the reason is that the theory provides a brand new thought for vibration reduction and noise reduction research. The phononic crystal is a periodic composite material or structure with a forbidden band formed by periodically arranging two or more materials, and elastic waves in the frequency range of the forbidden band cannot be transmitted. At present, a phononic crystal theory has been successfully introduced into engineering structural components, so that engineering components such as periodic beams, periodic plates, thin-film type acoustic metamaterials and the like with band gaps are formed, and a foundation is provided for the vibration and noise reduction design of an engineering structure. Phononic crystals can be divided into scattering type phononic crystals and local resonance type phononic crystals, the scattering type phononic crystals require that the wavelength of elastic waves is at least equivalent to the lattice constant thereof, the wavelength of elastic waves in the local resonance type phononic crystals can be smaller than the lattice constant, and when the lattice constant is smaller than 1/10 of the wavelength, such phononic crystals are also called sub-wavelength structures; the band gap frequency formed by the local resonance type phononic crystal is lower than that formed by a scattering type phononic crystal with the same size.
Engineering generally refers to a rod subject to bending as a beam. The beam structure is a typical structure widely applied to engineering, and a plurality of devices can be simplified into the beam structure such as rockets, ships, bridges and the like, so that the vibration characteristics of the beam structure are consistent and widely concerned, and the beam structure is a research hotspot in the fields of civil engineering, mechanical engineering, mechanics, acoustics and the like. The vibration of the beam structure may be manifested in the form of elastic wave propagation. Therefore, when the beam structure is designed into a periodic structure by using the local resonance type phononic crystal theory, the elastic wave band gap exists in the beam, the propagation of vibration in the beam structure can be controlled by using the band gap, and a new technical approach is provided for the vibration reduction design of the beam structure.
Disclosure of Invention
The invention provides a periodic box beam structure with vibrators arranged on a diaphragm plate, which can be regarded as a local resonance type phononic crystal, has an elastic wave band gap and can be used for damping vibration of building structures such as bridges and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a periodic box girder structure with vibrators arranged on diaphragm plates comprises a plurality of basic units, wherein each basic unit comprises a top plate and a bottom plate, two webs are arranged between the top plate and the bottom plate, and the top plate, the webs, the bottom plate and the webs are sequentially connected to form a box-type structure;
a transverse partition plate is inserted in the box-type structure to separate the interior of the box-type structure into two spaces;
at least one vibrator is arranged on the diaphragm plate, and each vibrator is embedded on the diaphragm plate in a covering mode through elastic light fillers;
defining the direction perpendicular to the diaphragm as the z-direction and the direction parallel to the diaphragm as the z-directionxIn a direction perpendicular to the base plateyDirection, constructing a three-dimensional coordinate system, a plurality of basic units alongzExtending the direction to form a periodic box girder structure;
as a further optimization of the invention, the two webs are simultaneously and vertically arranged with the bottom plate, or the two webs and the bottom plate are arranged in an angle, and the box-shaped structure is in a trapezoidal structure;
as further optimization of the invention, after the top plate of the box-type structure is connected with the two webs, the two sides of the top plate do not extend out of the edges of the webs to form an L-shaped structure with the webs;
or the top plate extends out of the edge of the web plate and forms a T-shaped structure with the web plate;
as a further preferred aspect of the present invention, the web is a plate-like structure, or the web is in a corrugated shape;
the thickness of the web plate, the top plate and the bottom plate is the same or different in pairs;
as a further preferred aspect of the present invention, the vibrator is made of concrete or reinforced concrete or steel or lead or tin or copper material;
the elastic light filler is made of foamed concrete or rubber or foam or plastic;
the diaphragm plates, the webs, the top plate and the bottom plate are made of concrete plates or reinforced concrete plates or steel plates or aluminum alloy plates or FRP composite material plates;
in a further preferred embodiment of the present invention, the vibrator has a circular column shape or a rectangular column shape.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the invention can inhibit the propagation of P wave and S wave in the plate and reduce the bending vibration of the box girder structure, thereby having application value on large bridges, such as cable-stayed bridges, suspension bridges and the like;
2. the box girder structure is made of common and cheap building materials such as concrete, steel, rubber and the like, and has better economical efficiency;
3. the periodic box beam structure provided by the invention forms a local resonance type periodic beam, so that a low-frequency elastic wave band gap can be formed by a small-sized structure.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of the continuation process of the basic unit of the preferred embodiment 1 provided by the present invention;
FIG. 2 is a cross-sectional view of the basic unit of the preferred embodiment 1 provided by the present invention;
FIG. 3 is a schematic diagram of the basic unit structure of the preferred embodiment 2 provided by the present invention;
FIG. 4 is an example of the application of the preferred embodiment 1 provided by the present invention;
FIG. 5 is an example of the present invention as applied to the preferred embodiment 2;
FIG. 6 is an example of an application of the preferred embodiment 3 provided by the present invention;
fig. 7 is an example of the diaphragm with vibrator according to the present invention applied to the upper part of a cable-stayed bridge.
In the figure: the vibrator is characterized in that 1 is a vibrator, 2 is elastic light filler, 3 is a diaphragm plate, 4 is a web plate, 5 is a top plate, 6 is a bottom plate, and 7 is a box-shaped structure.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
The application aims at providing a periodic box beam structure, which is designed into a periodic structure by utilizing a local resonance type phononic crystal theory, so that the periodic structure has an elastic wave band gap and is used for damping the building structures such as bridges and the like.
The structure mainly comprises N basic units, wherein each basic unit comprises a top plate and a bottom plate, two webs are arranged between the top plate and the bottom plate, and a box-type structure 7 is formed by sequentially connecting a top plate 5, a web 4, a bottom plate 6 and webs; a transverse partition plate 3 is inserted in the box-type structure to separate the interior of the box-type structure into two spaces; as shown in fig. 2, at least one vibrator is mounted on the diaphragm plate, and each vibrator is embedded on the diaphragm plate in a covering manner through an elastic light filler 2;
taking FIG. 1 as an example, the direction perpendicular to the diaphragm is defined aszThe direction parallel to the diaphragm isxIn a direction perpendicular to the base plateyAnd (4) constructing a three-dimensional coordinate system, and extending a plurality of basic units along the z direction to form a periodic box girder structure.
Example 1:
the embodiment 1 provided by the application is the structure shown in fig. 1, two web plates are simultaneously and vertically arranged with a bottom plate, the whole box-type structure is a square structure, four vibrators 1 are arranged on a transverse partition plate positioned in the box-type structure, and the four vibrators are also arranged in a square shape according to the sequence; in the embodiment 1, the box-type structure in the embodiment 1 is made of reinforced concrete, the vibrator is made of steel, the elastic light filler is made of rubber, the diaphragm plate is made of reinforced concrete platex-zAfter the in-plane continuation, a box girder as shown in fig. 4 is formed, which can be used for the superstructure of a bridge.
Example 2:
in the embodiment 2 provided by the application, as shown in fig. 3, two webs and a bottom plate are arranged at a certain angle, so that the whole box-type structure is in a trapezoidal structure, in the embodiment 2, a top plate extends out of the edge of the web to form a T-shaped structure with the web, and only one vibrator is arranged at the central position on a diaphragm plate positioned in the top plate; in the embodiment 2, the box-type structure in the embodiment 2 is made of reinforced concrete, the vibrator is made of metal tungsten, the elastic light-weight filler is made of foam, the diaphragm plate is made of reinforced concrete platex-zThe box girder shown in fig. 5 is formed after the extension in the plane, and can be used for the upper structure of a bridge; it should be noted that, since the box-shaped structures of embodiment 2 are trapezoidal, after a plurality of box-shaped structures are extended, a gap is formed between each box-shaped structure, and therefore, it is necessary to form a connection between adjacent box-shaped structures by using a diaphragm to enhance the transverse connection, and a diaphragm having a vibrator may be used according to the specific situation.
Example 3:
the present application also provides an embodiment 3, which is shown in fig. 6, and the web is not a plate-like structure, but a corrugated web is used in a box-type structure, which can achieve the purpose required in embodiment 1 or embodiment 2.
Finally, fig. 7 shows a schematic diagram of applying the diaphragm with the vibrator in the present application to the upper structure of a cable-stayed bridge, so that the whole upper structure can be a local resonance type periodic box girder, the propagation of P waves and S waves can be effectively inhibited, and the bending vibration caused by traffic load can be reduced.
Through the auxiliary statement of the embodiment, the local resonance type periodic beam is formed, the effect of forming the low-frequency elastic wave band gap by using a small-sized structure can be finally realized, and a new technical approach is provided for the vibration reduction design of the beam structure.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" as used herein is intended to include both the individual components or both.
The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. The utility model provides a settle cycle case roof beam structure of oscillator on diaphragm which characterized in that: the structure comprises a plurality of basic units, wherein each basic unit comprises a top plate and a bottom plate, two webs are arranged between the top plate and the bottom plate, and the top plate, the webs, the bottom plate and the webs are sequentially connected to form a box-type structure;
a transverse partition plate is inserted in the box-type structure to separate the interior of the box-type structure into two spaces;
at least one vibrator is arranged on the diaphragm plate, and each vibrator is embedded on the diaphragm plate in a covering mode through elastic light fillers;
defining the direction perpendicular to the diaphragm as the z-direction and the direction parallel to the diaphragm as the z-directionxIn a direction perpendicular to the base plateyDirection, constructing a three-dimensional coordinate system, a plurality of basic units alongzAnd extending the direction to form a periodic box girder structure.
2. The periodic box beam structure with vibrators mounted on diaphragms of claim 1, wherein: the two webs are simultaneously and vertically arranged with the bottom plate, or the two webs and the bottom plate are arranged at an angle, and the box-type structure is of a trapezoidal structure.
3. The periodic box beam structure with vibrators mounted on diaphragms of claim 1, wherein: after a top plate of the box-type structure is connected with the two webs, the two sides of the top plate do not extend out of the edges of the webs to form an L-shaped structure with the webs;
or the top plate extends out of the edge of the web plate to form a T-shaped structure with the web plate.
4. The periodic box beam structure with vibrators mounted on diaphragms of claim 1, wherein: the web is of a plate-shaped structure, or the web is in a corrugated shape;
the thickness of the web plate, the top plate and the bottom plate is the same or different in pairs.
5. The periodic box beam structure with vibrators mounted on diaphragms of claim 1, wherein: the vibrator is made of concrete or reinforced concrete or steel or lead or tin or copper materials;
the elastic light filler is made of foamed concrete or rubber or foam or plastic;
the diaphragm plate, the web plate, the top plate and the bottom plate are made of concrete plates or reinforced concrete plates or steel plates or aluminum alloy plates or FRP composite plates.
6. The periodic box beam structure with vibrators mounted on diaphragms of claim 1, wherein: the vibrator is in a circular column or a rectangular column shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183929.4A CN112227177A (en) | 2020-10-29 | 2020-10-29 | Periodic box girder structure with vibrators arranged on diaphragm plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183929.4A CN112227177A (en) | 2020-10-29 | 2020-10-29 | Periodic box girder structure with vibrators arranged on diaphragm plate |
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| Publication Number | Publication Date |
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| CN112227177A true CN112227177A (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011183929.4A Pending CN112227177A (en) | 2020-10-29 | 2020-10-29 | Periodic box girder structure with vibrators arranged on diaphragm plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942052A (en) * | 2021-02-03 | 2021-06-11 | 江苏旭辰交通科技发展有限公司 | Fabricated combined box girder for constructing earthquake-resistant structure and construction method thereof |
| CN114277655A (en) * | 2021-10-22 | 2022-04-05 | 中铁七局集团有限公司 | Corrugated steel web plate with phononic crystal |
-
2020
- 2020-10-29 CN CN202011183929.4A patent/CN112227177A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942052A (en) * | 2021-02-03 | 2021-06-11 | 江苏旭辰交通科技发展有限公司 | Fabricated combined box girder for constructing earthquake-resistant structure and construction method thereof |
| CN114277655A (en) * | 2021-10-22 | 2022-04-05 | 中铁七局集团有限公司 | Corrugated steel web plate with phononic crystal |
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