CN105888286B - A kind of method that groove profile collar extension plate moves up reinforcement Steel Tube Joint - Google Patents
A kind of method that groove profile collar extension plate moves up reinforcement Steel Tube Joint Download PDFInfo
- Publication number
- CN105888286B CN105888286B CN201610310317.4A CN201610310317A CN105888286B CN 105888286 B CN105888286 B CN 105888286B CN 201610310317 A CN201610310317 A CN 201610310317A CN 105888286 B CN105888286 B CN 105888286B
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- Prior art keywords
- reinforced
- collar extension
- groove profile
- extension plate
- branch pipe
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- 229910001294 Reinforcing steel Inorganic materials 0.000 title claims description 14
- 238000000034 method Methods 0.000 title abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000003466 welding Methods 0.000 claims abstract description 21
- 230000002146 bilateral effect Effects 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 abstract description 11
- 238000009418 renovation Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000035899 viability Effects 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 description 13
- 230000002787 reinforcement Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
-
- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- 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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B1/5831—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially rectangular form
-
- 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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2406—Connection nodes
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The top surface centre position for being reinforced node host is vertically welded with branch pipe；Groove profile collar extension plate is welded on the tube body of branch pipe, groove profile collar extension plate is along supervisor's axis direction or being welded on the two sides for being reinforced node host or being reinforced on the upper surface of node host perpendicular to supervisor's axis direction, to be formed around weld seam, center attachment weld and bilateral attachment weld；It, can be by the edge of a wing of groove profile collar extension plate and the sidewall weld for being reinforced node host when groove profile collar extension plate is along being reinforced node host axis direction arrangement, and when being reinforced node host face width and being difficult to ensure the welding of bilateral attachment weld；A kind of groove profile collar extension plate, which moves up, to be reinforced the method for Steel Tube Joint and is applicable not only to the Steel Tube Joint of viability and reinforces and renovation reinforced, and the processing of the reinforced node of design phase steel-tube construction is also applied for；The collar extension plate of this method is moved up with branch pipe weld seam, can either improve the static strength of node, and can protect supervisor and the weld seam at branch pipe, avoids weld seam brittle break, and then improve the anti-earthquake ductility performance of welding node.
Description
Technical field
The present invention relates to a kind of methods for reinforcing Steel Tube Joint, belong to construction engineering technical field, especially a kind of groove profile ring
Oralia moves up the method for reinforcing Steel Tube Joint.
Background technology
Steel-tube construction is widely used in building, bridge, pylon and offshore platform structure, reliable ultimate bearing capacity of joints pair
Ensure that structure is extremely important safely.For hollow, thin-walled steel pipe, radial rigidity is much smaller than axial rigidity, the diameter at node
It is much smaller than axial carrying capacity to bearing capacity.It is easiest to deform or break in practice so node weld position is engineering
There is realistic meaning at bad position very much to the Research on Reinforcement Method of node.The reinforcement means of Steel Tube Joint can be divided into inside by construction
Method for strengthening and externally reinforced method.Internal reinforcement is mainly including setting stiffening ring in increase supervisor wall thickness, fill concrete, supervisor or erecting
To several ways such as plates.Internal reinforcement method does not influence node appearance, but due to need to be in interior construction, construction technology
Complexity, difficulty is larger, can only be used in the design phase, it is difficult to be used for the reinforcement of existing structure.The externally reinforced method packet of node
Include welding pasting board, collar extension pasting board, collar extension cornerite pasting board and ribbed stiffener etc..Pasting board method is easy for construction, smaller on constructional appearance influence,
Using relatively broad.But when branch pipe width and little supervisor's different widths, since the space of pasting board is not welded on supervisor surface,
It is not easy to realize that pasting board is reinforced.Although collar extension cornerite pasting board method overcomes the limitation of supervisor's face width, and can be used for existing structure
Or the joint strengthening of newly-built structure, but it is to be improved for the protecting effect of weld seam crack in tension, reinforcing joint still has brittleness to open
The destruction risk split.Therefore, it is necessary to further research and develop, easy for construction, construction is reasonable, protect weld seam and improves adding for ductility of joint
Strong method.
Invention content
Place in order to overcome the above-mentioned deficiencies of the prior art, a kind of groove profile collar extension plate of present invention offer move up reinforcement steel pipe joint
Point method, this method be applicable not only to viability Steel Tube Joint reinforce and it is renovation reinforced, be also applied for design phase steel
The processing of the reinforced node of pipe structure can either improve the static strength of node, and can increase prerupture deformability, prevent
Only there is brittle break with the weld seam at branch pipe in supervisor, and then ensures that there is good antidetonation to prolong for steel construction rigid frame or truss structure
Property performance.
The technical solution adopted by the present invention to solve the technical problems is：Scheme one：A kind of groove profile collar extension plate moves up reinforcement
The method of Steel Tube Joint, including：It is reinforced node host, groove profile collar extension plate, branch pipe, around weld seam, bilateral attachment weld, center
Attachment weld；It is vertically welded with branch pipe in the top surface centre position for being reinforced node host；It is welded on the tube body of branch pipe
Groove profile collar extension plate, groove profile collar extension plate are reinforced node host along supervisor's axis direction or perpendicular to being welded on for axis direction of supervisor
Two sides on or be reinforced on the upper surface of node host, to be formed around weld seam, center attachment weld and bilateral company
Welding seam；It is arranged when groove profile collar extension plate edge is reinforced node host axis direction, and is reinforced node host face width and is difficult to
It, can be by the edge of a wing of groove profile collar extension plate and the sidewall weld for being reinforced node host when ensureing the welding of bilateral attachment weld.
Described be reinforced between node host and branch pipe is reinforced by groove profile collar extension plate, and the height of groove profile collar extension plate should not surpass
It crosses and is reinforced the 1/2 of node host height.
A kind of groove profile collar extension plate moves up the method for reinforcing Steel Tube Joint, when for reinforcing flat in-plane bending node
When, groove profile collar extension plate is along supervisor's axis direction arrangement；When for reinforcing outside plane by curved node, groove profile collar extension plate is perpendicular to master
Tube axis direction is arranged；When for reinforcing axially loaded node, groove profile collar extension plate can be along supervisor's axis or perpendicular to charge shaft
Line is arranged.
The groove profile collar extension plate moves up the method for reinforcing Steel Tube Joint, and it is rectangular steel pipe, the branch to be reinforced node host
Pipe is rectangle or round steel pipe.
When the branch pipe is rectangular steel pipe, groove profile collar extension plate is connected the opened C-shaped aperture mouth in side with branch pipe for U-shaped；The branch
When pipe is round steel pipe, groove profile collar extension plate is connected the opened C-shaped aperture mouth in side with branch pipe for semicircle.
The groove profile collar extension plate moves up the method for reinforcing Steel Tube Joint, when this method is for reinforcing newly-built Steel Tube Joint,
Aperture identical with branch tube shape is first cut out on the web of groove profile collar extension plate, and branch pipe is penetrated to the aperture of groove profile collar extension plate
In, then branch pipe welded directly to the run pipe and the center attachment weld being reinforced between node host, the groove profile collar extension plate edge of a wing is moved to and is added
Strong node host surface contact, last welding groove type ring oralia 2 and the bilateral attachment weld being reinforced between node host and
Around weld seam between groove profile collar extension plate and branch pipe；
When this method is for reinforcing being completed Steel Tube Joint, first by the incision of the web of C-shaped ring oralia and half
Then C-shaped aperture mouth is surrounded branch pipe by the corresponding C-shaped aperture mouth of branch tube shape, the bottom edge of C-shaped ring oralia and will be reinforced node later
It is responsible for surface contact, bilateral attachment weld, the C-shaped ring mouth for finally welding C-shaped ring oralia successively and being reinforced between node host
The groove type plate splicing welding joint between circular weld seam and two C-shaped ring oralias between plate and branch pipe.
Beneficial effects of the present invention：A kind of groove profile collar extension plate, which moves up, to be reinforced the method for Steel Tube Joint and is applicable not only to service
The Steel Tube Joint of period is reinforced and renovation reinforced, and the processing of the reinforced node of design phase steel-tube construction is also applied for；We
The collar extension plate of method is moved up with branch pipe weld seam, can either improve the static strength of node, and can protect supervisor and the weld seam at branch pipe,
Weld seam brittle break is avoided, and then improves the anti-earthquake ductility performance of welding node.
Description of the drawings
Invention is further described in detail with reference to the accompanying drawings and embodiments：
Fig. 1 is principle schematic diagram of the present invention for reinforcing newly-built Steel Tube Joint.
Fig. 2 is groove profile collar extension plate perpendicular to the schematic diagram for being reinforced node host placement.
Fig. 3 is groove profile collar extension plate and is reinforced the schematic diagram of node host sidewall weld.
Fig. 4 is the principle schematic diagram for reinforcing having Steel Tube Joint after C-shaped ring oralia docks.
Fig. 5 is C-shaped ring oralia principle schematic diagram.
In figure：1. it is reinforced node host, 2. groove profile collar extension plates, 3. branch pipes, 4. circular weld seams, 5. bilateral attachment welds,
6. center attachment weld, 7. groove type plate splicing welding joints, 8.C shapes aperture, 9.C shape collar extension plates.
Specific implementation mode
Scheme one：In Fig. 1,2,3, a kind of method that groove profile collar extension plate moves up reinforcement Steel Tube Joint, including：It is reinforced section
Point supervisor 1, groove profile collar extension plate 2, branch pipe 3, around weld seam 4, bilateral attachment weld 5, center attachment weld 6；It is being reinforced node
The top surface centre position of supervisor 1 is vertically welded with branch pipe 3；Groove profile collar extension plate 2, groove profile ring are welded on the tube body of branch pipe 3
Oralia 2 along supervisor axis direction or perpendicular to supervisor axis direction be welded on the two sides for being reinforced node host 1 or
It is reinforced on the upper surface of node host 1, to be formed around weld seam 4, center attachment weld 6 and bilateral attachment weld 5；Work as slot
Type ring oralia 2 along be reinforced 1 axis direction of node host arrangement, and be reinforced 1 face width of node host be difficult to ensure it is bilateral
It, can be by the edge of a wing of groove profile collar extension plate 2 and the sidewall weld for being reinforced node host 1 when the welding of attachment weld 5.
Scheme two：In Fig. 4,5, a kind of method that groove profile collar extension plate moves up reinforcement Steel Tube Joint, including：It is reinforced node
Supervisor 1, groove profile collar extension plate 2, branch pipe 3, around weld seam 4, bilateral attachment weld 5, center attachment weld 6, groove type plate splicing welding joint
7, C-shaped aperture mouth 8, C-shaped ring oralia 9；It is vertically welded with branch pipe 3 in the top surface centre position for being reinforced node host 1；Branch pipe 3
Groove profile collar extension plate 2 is welded on tube body；Groove profile collar extension plate 2, which is spliced by two symmetrical C-shaped ring oralias 9 by groove type plate, to be welded
Seam 7 is welded to form；It is provided with C-shaped aperture mouth 8 identical with 3 shape of half branch pipe, two C-shapeds in the middle part of the top surface of C-shaped ring oralia 9
Aperture 8 surrounds branch pipe 3, and welds together with branch pipe 3；Groove profile collar extension plate 2 is along supervisor's axis direction or perpendicular to charge shaft
Line direction is welded on the two sides for being reinforced node host 1 or is reinforced on the upper surface of node host 1, so as to form
Around weld seam 4, bilateral attachment weld 5, center attachment weld 6 and groove type plate splicing welding joint 7；When groove profile collar extension plate 2 is along being reinforced
1 axis direction of node host arranges, and when being reinforced 1 face width of node host and being difficult to ensure the welding of bilateral attachment weld 5,
It can be by the edge of a wing of groove profile collar extension plate 2 and the sidewall weld for being reinforced node host 1.
Described be reinforced between node host 1 and branch pipe 3 is reinforced by groove profile collar extension plate 2, and the height of groove profile collar extension plate 2 is not
Preferably it is more than be reinforced node host height 1/2.
A kind of groove profile collar extension plate moves up the method for reinforcing Steel Tube Joint, when for reinforcing flat in-plane bending node
When, groove profile collar extension plate 2 is along supervisor's axis direction arrangement；When for reinforcing outside plane by curved node, groove profile collar extension plate 2 perpendicular to
It is responsible for axis direction arrangement；When for reinforcing axially loaded node, groove profile collar extension plate 2 can be along supervisor's axis or perpendicular to supervisor
Axis is arranged.
The groove profile collar extension plate moves up the method for reinforcing Steel Tube Joint, and it is rectangular steel pipe, the branch to be reinforced node host 1
Pipe 3 is rectangle or round steel pipe.
When the branch pipe 3 is rectangular steel pipe, groove profile collar extension plate 2 is connected the opened C-shaped aperture mouth 8 in side with branch pipe 3 for U-shaped；Institute
When to state branch pipe 3 be round steel pipe, the opened C-shaped aperture mouth 8 in side that is connected with branch pipe 3 of groove profile collar extension plate 2 is semicircle.
The groove profile collar extension plate moves up the method for reinforcing Steel Tube Joint, when this method is for reinforcing newly-built Steel Tube Joint,
Aperture identical with 3 shape of branch pipe is first cut out on the web of groove profile collar extension plate 2, and branch pipe 3 is penetrated to the hole of groove profile collar extension plate 2
In mouthful, then branch pipe welded directly to the run pipe 3 and the center attachment weld 6 being reinforced between node host 1,2 edge of a wing of groove profile collar extension plate is moved to
It is contacted with 1 surface of node host is reinforced, last welding groove type ring oralia 2 and the bilateral connection being reinforced between node host 1
Around weld seam 4 between weld seam 5 and groove profile collar extension plate 2 and branch pipe 3；
When this method is for reinforcing being completed Steel Tube Joint, first by the incision of the web of C-shaped ring oralia 9 and half
The corresponding C-shaped aperture mouth 8 of 3 shape of branch pipe, then by C-shaped aperture mouth 8 surround branch pipe 3, later by the bottom edge of C-shaped ring oralia 9 with added
Strong 1 surface of node host contact, finally welding C-shaped ring oralia 9 and the bilateral attachment weld that is reinforced between node host 1 successively
5, the groove type plate splicing welding joint 7 between the circular weld seam 4 between C-shaped ring oralia 9 and branch pipe 3 and two C-shaped ring oralias 9.
Claims (1)
1. a kind of groove profile collar extension plate moves up reinforcement Steel Tube Joint, including be reinforced node host (1), groove profile collar extension plate (2) and
Branch pipe (3), described be reinforced between node host (1) and branch pipe (3) are reinforced by groove profile collar extension plate (2), the groove profile collar extension
The height of plate (2), which is no more than, is reinforced the 1/2 of node host height, it is characterised in that：The groove profile collar extension plate (2) is right by two
The C-shaped ring oralia (9) of title is welded to form by groove type plate splicing welding joint (7), is provided in the middle part of the top surface of C-shaped ring oralia (9) and two
The identical C-shaped aperture mouth (8) of/mono- branch pipe (3) shape；The top surface centre position for being reinforced node host (1) is vertically welded with branch
It manages (3)；Groove profile collar extension plate (2) is welded on the tube body of branch pipe (3), groove profile collar extension plate (2) is along supervisor's axis direction welding
It is welded on the two sides for being reinforced node host (1) or perpendicular to supervisor's axis direction and is reinforced node host (1)
On upper surface, to be formed around weld seam (4), center attachment weld (6) and bilateral attachment weld (5)；When groove profile collar extension plate
(2) edge is reinforced node host (1) axis direction arrangement, and is reinforced node host (1) face width and is difficult to ensure bilateral company
When the welding of welding seam (5), by the edge of a wing of groove profile collar extension plate (2) and the sidewall weld for being reinforced node host (1), groove profile collar extension
It the web of plate (2) and is reinforced between the upper surface of node host (1) and has certain spacing in the height direction；It is described to be reinforced
Node host (1) is rectangular steel pipe；The branch pipe (3) is rectangle or round steel pipe, when the branch pipe (3) is rectangular steel pipe,
Groove profile collar extension plate (2) be connected with branch pipe (3) the opened C-shaped aperture mouth (8) in side be U-shaped, when the branch pipe (3) be round steel pipe when,
Groove profile collar extension plate (2) is connected the opened C-shaped aperture mouth (8) in side with branch pipe (3) for semicircle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610310317.4A CN105888286B (en) | 2016-05-12 | 2016-05-12 | A kind of method that groove profile collar extension plate moves up reinforcement Steel Tube Joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610310317.4A CN105888286B (en) | 2016-05-12 | 2016-05-12 | A kind of method that groove profile collar extension plate moves up reinforcement Steel Tube Joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105888286A CN105888286A (en) | 2016-08-24 |
| CN105888286B true CN105888286B (en) | 2018-07-27 |
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| CN201610310317.4A Expired - Fee Related CN105888286B (en) | 2016-05-12 | 2016-05-12 | A kind of method that groove profile collar extension plate moves up reinforcement Steel Tube Joint |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608414A (en) * | 2020-05-07 | 2020-09-01 | 中建科工集团有限公司 | Reinforcing and reforming structure and method for building steel structure |
| CN113006515A (en) * | 2021-02-26 | 2021-06-22 | 中国矿业大学 | Reinforcing device and reinforcing method for steel pipe joint |
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| CN202899640U (en) * | 2012-11-09 | 2013-04-24 | 中国矿业大学 | Collar flitch reinforced steel pipe joint |
| CN103526950A (en) * | 2013-10-29 | 2014-01-22 | 山东科技大学 | Concrete-filled square steel tube and steel beam semi-rigid reinforcing joint for preventing progressive collapse |
| CN103669898A (en) * | 2013-11-22 | 2014-03-26 | 江苏建筑职业技术学院 | Method for reinforcing steel tube truss tubular joint through ring opening sleeves |
| CN203701297U (en) * | 2014-02-08 | 2014-07-09 | 长安大学 | KT-shaped space buckling-resisting tubular joint of rectangular steel tube structure |
| CN203701298U (en) * | 2014-02-08 | 2014-07-09 | 长安大学 | T-shaped plane buckling-resisting tubular joint of rectangular steel tube structure |
| CN203701296U (en) * | 2014-02-08 | 2014-07-09 | 长安大学 | Y-shaped plane anti-buckling tubular joint of rectangular steel pipe structure |
| CN104100007A (en) * | 2014-07-16 | 2014-10-15 | 天元建设集团有限公司 | Double-lug-plate type square tube column and H-shaped steel frame variable-beam-depth assembly joint and construction method thereof |
| CN104846752A (en) * | 2015-05-19 | 2015-08-19 | 河南省交通规划勘察设计院有限责任公司 | Anti-fatigue reinforcing device for connection nodes of chord of bridge arch rib and construction method thereof |
| CN205604751U (en) * | 2016-05-12 | 2016-09-28 | 中国矿业大学 | Enhancement steel pipe node that cell type collar extension board shifted up |
-
2016
- 2016-05-12 CN CN201610310317.4A patent/CN105888286B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926466A (en) * | 2012-11-09 | 2013-02-13 | 中国矿业大学 | Method for enhancing warp angle of ring mouth flitch of steel pipe node |
| CN202899640U (en) * | 2012-11-09 | 2013-04-24 | 中国矿业大学 | Collar flitch reinforced steel pipe joint |
| CN103526950A (en) * | 2013-10-29 | 2014-01-22 | 山东科技大学 | Concrete-filled square steel tube and steel beam semi-rigid reinforcing joint for preventing progressive collapse |
| CN103669898A (en) * | 2013-11-22 | 2014-03-26 | 江苏建筑职业技术学院 | Method for reinforcing steel tube truss tubular joint through ring opening sleeves |
| CN203701297U (en) * | 2014-02-08 | 2014-07-09 | 长安大学 | KT-shaped space buckling-resisting tubular joint of rectangular steel tube structure |
| CN203701298U (en) * | 2014-02-08 | 2014-07-09 | 长安大学 | T-shaped plane buckling-resisting tubular joint of rectangular steel tube structure |
| CN203701296U (en) * | 2014-02-08 | 2014-07-09 | 长安大学 | Y-shaped plane anti-buckling tubular joint of rectangular steel pipe structure |
| CN104100007A (en) * | 2014-07-16 | 2014-10-15 | 天元建设集团有限公司 | Double-lug-plate type square tube column and H-shaped steel frame variable-beam-depth assembly joint and construction method thereof |
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| CN205604751U (en) * | 2016-05-12 | 2016-09-28 | 中国矿业大学 | Enhancement steel pipe node that cell type collar extension board shifted up |
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| CN105888286A (en) | 2016-08-24 |
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