CN111997219B - Buckling restrained energy dissipation brace - Google Patents
Buckling restrained energy dissipation brace Download PDFInfo
- Publication number
- CN111997219B CN111997219B CN202010860587.9A CN202010860587A CN111997219B CN 111997219 B CN111997219 B CN 111997219B CN 202010860587 A CN202010860587 A CN 202010860587A CN 111997219 B CN111997219 B CN 111997219B
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- connector
- fixedly connected
- support
- connecting plate
- supporting column
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- 230000021715 photosynthesis, light harvesting Effects 0.000 title abstract description 16
- 210000003205 muscle Anatomy 0.000 claims description 16
- 230000035939 shock Effects 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000011449 brick Substances 0.000 abstract description 38
- 208000031872 Body Remains Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Environmental & Geological Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a buckling restrained energy dissipation brace, which is characterized in that a middle support column is fixed in the center of a wall body in a threaded manner to vertically support a long-span wall body, a plurality of placing plates horizontally arranged along the vertical direction support the bottom of a brick body to keep the brick body horizontally installed, a bottom connecting plate and a top resisting plate support the upper side and the lower side of the brick wall body to keep the vertical direction of the brick wall body stable, and a transverse tie bar and a vertical tie bar are respectively embedded in the brick wall body through a transverse pressing cover plate and a vertical pressing cover plate to strengthen the stability of the wall body, so that the brick wall body can keep the integral stability after being provided with the buckling restrained energy dissipation brace.
Description
Technical Field
The invention relates to the technical field of building vibration reduction, in particular to a buckling restrained energy dissipation brace.
Background
At present, the buckling phenomenon can be generated when a common support is pressed, and when the support is pressed and buckled, the rigidity and the bearing capacity are sharply reduced. Under the action of earthquake or wind, the internal force of the support is changed back and forth under the two states of compression and tension. When the support is gradually changed from a buckling state to a tensioned state, the internal force and the rigidity of the support are close to zero, and in order to solve the problems of buckling under pressure and poor hysteresis performance of a common support, a sleeve is arranged outside the support to restrain the buckling of the support, so that the buckling restrained support is formed.
The buckling restrained energy-dissipation brace is used for supporting a large-span beam and needs to be hidden in a wall body, and covers the outer surface of the buckling restrained energy-dissipation brace through a masonry brick body, but the conventional buckling restrained energy-dissipation brace does not have a supporting device for the brick body, so that the connection between the brick body and the buckling restrained energy-dissipation brace is poor, and the brick body is easy to loosen.
Disclosure of Invention
The invention aims to provide a buckling-restrained energy-dissipation brace, and aims to solve the technical problems that a brick body is not connected well with the buckling-restrained energy-dissipation brace and the brick body is easy to loosen due to the fact that the buckling-restrained energy-dissipation brace in the prior art does not have a brace device for the brick body.
In order to achieve the purpose, the buckling restrained energy dissipation brace adopted by the invention comprises a first support column, a connector, a second support column and a bracing device; the connector is fixedly connected with the first support and is positioned at one end of the first support, and the second support is fixedly connected with the connector and is positioned at one side of the connector, which is far away from the first support; the supporting device comprises a middle supporting column, a placing plate, a bottom connecting plate, a top resisting plate and a fastening assembly, the middle supporting column is fixedly connected with the connector and is positioned between the first supporting column and the second supporting column, the placing plate is fixedly connected with the middle supporting column and is positioned at one end of the middle supporting column, which is far away from the connector, the bottom connecting plate is fixedly connected with the first supporting column and is fixedly connected with the second supporting column and is positioned between the first supporting column and the second supporting column, and the top resisting plate is fixedly connected with the connector and is positioned at one side of the connector, which is far away from the middle supporting column; fastening components includes horizontal drawknot muscle, transversely presses apron, vertical drawknot muscle and the vertical apron of pressing, horizontal drawknot muscle with middle part support column fixed connection, and be located the middle part support column sets up place one side of board, transversely press the apron with horizontal drawknot muscle fixed connection, and be located horizontal drawknot muscle is kept away from the one end of middle part support column, vertical drawknot muscle with bottom connecting plate fixed connection, and be located the bottom connecting plate is close to one side of connector, vertical pressfitting apron with vertical drawknot muscle fixed connection, and be located vertical drawknot muscle is kept away from the one end of bottom connecting plate.
The middle supporting column comprises a rectangular shell and a damping component, one end of the rectangular shell is fixedly connected with the connector, the other end of the rectangular shell penetrates through the bottom connecting plate, and the rectangular shell is positioned on one side, close to the bottom connecting plate, of the connector; the shock absorption assembly is connected with the rectangular shell in a sliding mode.
The middle supporting column further comprises an abutting part, the abutting part is fixedly connected with the rectangular shell, fixedly connected with the connector and located on one side, close to the connector, of the rectangular shell.
The fastening assembly further comprises a first transverse baffle, and the first transverse baffle is fixedly connected with the first support and is positioned on one side, perpendicular to the bottom connecting plate, of the first support.
The fastening assembly further comprises a second transverse baffle, and the second transverse baffle is fixedly connected with the second support column and is positioned on one side, perpendicular to the bottom connecting plate, of the second support column.
The supporting device further comprises a pressing plate, wherein the pressing plate is fixedly connected with the top resisting plate and is positioned on one side, close to the bottom connecting plate, of the top resisting plate.
According to the buckling-restrained energy-dissipation brace, the middle supporting column is fixed in the center of the wall body in a threaded mode, a large-span wall body is vertically supported, the plurality of placing plates horizontally arranged in the vertical direction support the bottom of the brick body, so that the brick body is horizontally installed, the bottom connecting plate and the top resisting plate support the upper side and the lower side of the brick wall body, the vertical direction of the brick wall body is kept stable, the transverse tie bars and the vertical tie bars are buried in the brick wall body through the transverse pressing cover plate and the vertical pressing cover plate respectively, the stability of the wall body is enhanced, and therefore the whole stability of the brick wall body can be kept after the buckling-restrained energy-dissipation brace is installed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of the supporting device of the present invention.
Fig. 2 is a schematic structural view of the fastening assembly of the present invention.
Figure 3 is a schematic view of the structure of the shock absorbing assembly of the present invention.
In the figure: 1-a first strut, 2-a connector, 3-a second strut, 4-a support device, 41-a middle support column, 42-a placing plate, 43-a bottom connecting plate, 44-a top resisting plate, 45-a fastening component, 46-a pressing plate, 100-a buckling restrained energy-consuming support, 411-a rectangular shell, 412-a shock-absorbing component, 451-a transverse tie bar, 452-a transverse pressing cover plate, 453-a vertical tie bar, 454-a vertical pressing cover plate, 455-a first transverse baffle, 456-a second transverse baffle, 4111-a sliding chute, 4121-a piston, 4122-a bottom support plate, 4123-a jacking spring and 4124-an abutting piece.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 3, the present invention provides a buckling restrained energy dissipating brace 100, which includes a first support column 1, a connector 2, a second support column 3 and a support device 4; the connector 2 is fixedly connected with the first support column 1 and is positioned at one end of the first support column 1, and the second support column 3 is fixedly connected with the connector 2 and is positioned at one side of the connector 2 far away from the first support column 1; the supporting device 4 comprises a middle supporting column 41, a placing plate 42, a bottom connecting plate 43, a top resisting plate 44 and a fastening assembly 45, wherein the middle supporting column 41 is fixedly connected with the connector 2 and is positioned between the first supporting column 1 and the second supporting column 3, the placing plate 42 is fixedly connected with the middle supporting column 41 and is positioned at one end of the middle supporting column 41 far away from the connector 2, the bottom connecting plate 43 is fixedly connected with the first supporting column 1 and is fixedly connected with the second supporting column 3 and is positioned between the first supporting column 1 and the second supporting column 3, and the top resisting plate 44 is fixedly connected with the connector 2 and is positioned at one side of the connector 2 far away from the middle supporting column 41; the fastening assembly 45 comprises a transverse tie bar 451, a transverse pressing cover plate 452, a vertical tie bar 453 and a vertical pressing cover plate 454, the transverse tie bar 451 is fixedly connected with the middle support column 41 and is located on one side of the middle support column 41 where the placing plate 42 is arranged, the transverse pressing cover plate 452 is fixedly connected with the transverse tie bar 451 and is located at one end of the transverse tie bar 451, which is far away from the middle support column 41, the vertical tie bar 453 is fixedly connected with the bottom connecting plate 43 and is located on one side of the bottom connecting plate 43, which is close to the connector 2, and the vertical pressing cover plate 454 is fixedly connected with the vertical tie bar 453 and is located at one end of the vertical tie bar 453, which is far away from the bottom connecting plate 43.
In this embodiment, the first pillar 1 and the second pillar 3 are supported obliquely, the bottom of the first pillar 1 is connected to the left bottom end of the wall, the bottom of the second pillar 3 is connected to the right bottom end of the wall, the tops of the first pillar 1 and the second pillar 3 are connected by the connector 2 through threads, the top of the connector 2 is fixed to the bottom of the wall through threads, a rectangular wall frame is supported by a triangular support formed by the first pillar 1, the second pillar 3 and the connector 2, the middle pillar 41 is fixed to the bottom of the connector 2 through threads and is in contact with the ground to vertically support the connector 2, a plurality of placing plates 42 are fixed to the outer side surfaces of the middle pillar 41 through threads, the placing plates 42 are rectangular and are horizontally installed to support surrounding bricks of the middle pillar 41, the bottom connecting plate 43 is fixed between the bottom of the first support column 1 and the bottom of the second support column 3 through threads, the bottom connecting plate 43 is horizontally installed and can be used for horizontally placing a brick body, so that the position of a bottom foot of a wall body is tiled, the bottom of the wall body is kept horizontal, the top of the connector 2 is close to a beam, the top resisting plate 44 is fixed through threads and is used for extruding the top of the brick body, and the brick body is kept fixed in a pressed mode in the vertical direction; a plurality of horizontal tie bars 451 which are horizontally arranged are welded on the front side of the middle support column 41 in the vertical direction, a transverse pressing cover plate 452 is fixed on the free end portion of each horizontal tie bar 451 through threads, an included angle of 90 degrees is formed between each transverse pressing cover plate 452 and each horizontal tie bar 451, so that the side face of a wall body is supported, the side face of a brick body is kept stable, one end of each vertical tie bar 453 is welded on the front side of the bottom connecting plate 43 and is connected with the brick body vertically upwards, the central part of the brick body is better in connectivity, and looseness is not prone to occurring; so, middle part support column 41 threaded fixation carries out vertical braces at the center of wall body to the large-span wall body, and the polylith sets up along vertical direction level place the board 42 and support the bottom of the brick body, make the brick body keep horizontal installation, bottom connecting plate 43 with top is supported the board 44 and is supported the upper and lower side of brick wall body for the vertical direction of brick wall body remains stable, horizontal lacing wire 451 with vertical lacing wire 453 passes through respectively transversely press apron 452 with vertically press apron 454 to bury underground in the brick wall body, strengthen the steadiness of wall body, thereby make the brick wall body install can keep holistic steadiness behind bucking restraint energy dissipation brace 100.
Further, referring to fig. 3, the middle supporting column 41 includes a rectangular casing 411 and a shock absorbing assembly 412, one end of the rectangular casing 411 is fixedly connected to the connector 2, and the other end of the rectangular casing penetrates through the bottom connecting plate 43 and is located on one side of the connector 2 close to the bottom connecting plate 43; the shock absorbing member 412 is slidably coupled to the rectangular housing 411.
Further, referring to fig. 3, the damping member 412 includes a piston 4121 and a bottom supporting plate 4122, the piston 4121 is slidably connected to the rectangular housing 411 and is located inside the sliding groove 4111; the bottom support plate 4122 is fixedly connected to the piston 4121, abuts against the rectangular housing 411, and is located on a side of the rectangular housing 411 away from the connector 2.
In this embodiment, the top of the rectangular housing 411 is screwed with the connector 2, the bottom of the rectangular housing 411 penetrates through the bottom support plate 4122, the piston 4121 slides inside the rectangular housing 411 and presses the gas inside the rectangular housing 411 during the sliding, and the bottom support plate 4122 is screwed on the bottom of the piston 4121 and contacts with the ground, thereby supporting the bottom of the rectangular housing 411 and supporting the sliding of the rod of the piston 4121, so that the rectangular housing 411 is placed on the bottom support plate 4122, and the support stability of the rectangular housing 411 is ensured.
Further, referring to fig. 3, the rectangular housing 411 has a sliding slot 4111, the sliding slot 4111 is located inside the rectangular housing 411, and an opening is located on a side of the rectangular housing 411 away from the connector 2.
In this embodiment, the inside of the rectangular housing 411 has the sliding groove 4111, the inside of the sliding groove 4111 has an air pressure chamber, the piston 4121 slides inside the sliding groove 4111 and presses the air pressure chamber inside the sliding groove 4111 to slow down the sliding of the rod of the piston 4121, so that the rectangular housing 411 and the bottom support plate 4122 are kept stable.
Further, referring to fig. 3, the damping assembly 412 further includes a jacking spring 4123, one side of the jacking spring 4123 is fixedly connected to the piston 4121, and the other side is fixedly connected to the bottom support plate 4122 and is located inside the sliding groove 4111.
In the present embodiment, the lift-up spring 4123 is installed between the bottom support plate 4122 and the piston 4121, and the sliding of the piston 4121 is slowed by the resilient force of the lift-up spring 4123, thereby stabilizing the rectangular housing 411 and the bottom support plate 4122.
Further, referring to fig. 1, the middle supporting column 41 further includes an abutting member 4124, and the abutting member 4124 is fixedly connected to the rectangular housing 411, and is fixedly connected to the connector 2, and is located on a side of the rectangular housing 411 close to the connector 2.
In the present embodiment, the abutting member 4124 is a connecting member between the rectangular housing 411 and the connector 2, and connects the first column 1 and the second column 3 on both sides, so that the rectangular housing 411 has better stability.
Further, referring to fig. 2, the fastening assembly 45 further includes a first transverse baffle 455, and the first transverse baffle 455 is fixedly connected to the first pillar 1 and is located on a side of the first pillar 1 perpendicular to the bottom connecting plate 43.
In this embodiment, the first horizontal baffle 455 is screwed on the two vertical sides of the first pillar 1 to squeeze the outer surface of the brick wall, so that the outer surface of the brick wall is kept flat, and the flatness of the wall is better.
Further, referring to fig. 2, the fastening assembly 45 further includes a second transverse baffle 456, and the second transverse baffle 456 is fixedly connected to the second pillar 3 and is located on a side of the second pillar 3 perpendicular to the bottom connecting plate 43.
In this embodiment, the second horizontal baffles 456 are screwed on the two vertical sides of the second pillar 3 to squeeze the outer surface of the brick wall, so that the outer vertical surface of the brick wall is kept flat, and the flatness of the wall is better.
Further, referring to fig. 2, the supporting device 4 further includes a pressing plate 46, and the pressing plate 46 is fixedly connected to the top resisting plate 44 and is located on a side of the top resisting plate 44 close to the bottom connecting plate 43.
In this embodiment, the pressing plates 46 are screwed on two vertical sides of the top resisting plate 44 to press the outer surface of the brick wall, so that the outer vertical surface of the brick wall is kept flat, and the flatness of the wall is better.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The buckling restrained energy-consuming brace is characterized by comprising a first support column, a connector, a second support column and a bracing device;
the connector is fixedly connected with the first support and is positioned at one end of the first support, and the second support is fixedly connected with the connector and is positioned at one side of the connector, which is far away from the first support;
the supporting device comprises a middle supporting column, a placing plate, a bottom connecting plate, a top resisting plate and a fastening assembly, the middle supporting column is fixedly connected with the connector and is positioned between the first supporting column and the second supporting column, the placing plate is fixedly connected with the middle supporting column and is positioned at one end of the middle supporting column, which is far away from the connector, the bottom connecting plate is fixedly connected with the first supporting column and is fixedly connected with the second supporting column and is positioned between the first supporting column and the second supporting column, and the top resisting plate is fixedly connected with the connector and is positioned at one side of the connector, which is far away from the middle supporting column;
fastening components includes horizontal drawknot muscle, transversely presses apron, vertical drawknot muscle and the vertical apron of pressing, horizontal drawknot muscle with middle part support column fixed connection, and be located the middle part support column sets up place one side of board, transversely press the apron with horizontal drawknot muscle fixed connection, and be located horizontal drawknot muscle is kept away from the one end of middle part support column, vertical drawknot muscle with bottom connecting plate fixed connection, and be located the bottom connecting plate is close to one side of connector, vertical pressfitting apron with vertical drawknot muscle fixed connection, and be located vertical drawknot muscle is kept away from the one end of bottom connecting plate.
2. The buckling-restrained energy dissipating brace of claim 1,
the middle supporting column comprises a rectangular shell and a damping component, one end of the rectangular shell is fixedly connected with the connector, the other end of the rectangular shell penetrates through the bottom connecting plate, and the rectangular shell is positioned on one side, close to the bottom connecting plate, of the connector; the shock absorption assembly is connected with the rectangular shell in a sliding mode.
3. The buckling-restrained energy dissipating brace of claim 2,
the middle support column further comprises an abutting part, the abutting part is fixedly connected with the rectangular shell, fixedly connected with the connector and located on one side, close to the connector, of the rectangular shell.
4. The buckling-restrained energy dissipating brace of claim 1,
the fastening assembly further comprises a first transverse baffle, and the first transverse baffle is fixedly connected with the first support and is positioned on one side, perpendicular to the bottom connecting plate, of the first support.
5. The buckling-restrained energy dissipating brace of claim 1,
the fastening assembly further comprises a second transverse baffle, and the second transverse baffle is fixedly connected with the second support column and is positioned on one side, perpendicular to the bottom connecting plate, of the second support column.
6. The buckling-restrained energy dissipating brace of claim 1,
the supporting device further comprises a pressing plate, wherein the pressing plate is fixedly connected with the top resisting plate and is positioned on one side, close to the bottom connecting plate, of the top resisting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010860587.9A CN111997219B (en) | 2020-08-25 | 2020-08-25 | Buckling restrained energy dissipation brace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010860587.9A CN111997219B (en) | 2020-08-25 | 2020-08-25 | Buckling restrained energy dissipation brace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111997219A CN111997219A (en) | 2020-11-27 |
| CN111997219B true CN111997219B (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010860587.9A Expired - Fee Related CN111997219B (en) | 2020-08-25 | 2020-08-25 | Buckling restrained energy dissipation brace |
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| CN (1) | CN111997219B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112746754B (en) * | 2021-02-07 | 2022-06-24 | 西安建筑科技大学 | Buckling restrained brace |
| CN116122591B (en) * | 2023-04-17 | 2023-06-16 | 中国二十二冶集团有限公司 | Masonry method of wall body with buckling supports |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09279695A (en) * | 1996-04-13 | 1997-10-28 | Konoike Constr Ltd | Earthquake-resisting reinforcing structure and viscoelastic damper |
| CN105952229A (en) * | 2016-05-24 | 2016-09-21 | 成都市第建筑工程公司 | Installation and construction method for energy-dissipating type buckling-restrained brace |
| CN205777789U (en) * | 2016-05-26 | 2016-12-07 | 中船第九设计研究院工程有限公司 | A kind of damping energy-dissipating device damping peace treaty bundle support combinations |
| CN208604759U (en) * | 2018-06-26 | 2019-03-15 | 北京堡瑞思减震科技有限公司 | A kind of combination anchor slab and anti-buckling support connecting node |
| CN210288683U (en) * | 2019-06-06 | 2020-04-10 | 福建工程学院 | Connection structure for improving earthquake resistance of PC frame node |
-
2020
- 2020-08-25 CN CN202010860587.9A patent/CN111997219B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09279695A (en) * | 1996-04-13 | 1997-10-28 | Konoike Constr Ltd | Earthquake-resisting reinforcing structure and viscoelastic damper |
| CN105952229A (en) * | 2016-05-24 | 2016-09-21 | 成都市第建筑工程公司 | Installation and construction method for energy-dissipating type buckling-restrained brace |
| CN205777789U (en) * | 2016-05-26 | 2016-12-07 | 中船第九设计研究院工程有限公司 | A kind of damping energy-dissipating device damping peace treaty bundle support combinations |
| CN208604759U (en) * | 2018-06-26 | 2019-03-15 | 北京堡瑞思减震科技有限公司 | A kind of combination anchor slab and anti-buckling support connecting node |
| CN210288683U (en) * | 2019-06-06 | 2020-04-10 | 福建工程学院 | Connection structure for improving earthquake resistance of PC frame node |
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| CN111997219A (en) | 2020-11-27 |
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Granted publication date: 20211001 |