CN110056083B - Self-locking type FRP (fiber reinforced plastic) section beam column joint capable of being quickly assembled - Google Patents
Self-locking type FRP (fiber reinforced plastic) section beam column joint capable of being quickly assembled Download PDFInfo
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- CN110056083B CN110056083B CN201910303104.2A CN201910303104A CN110056083B CN 110056083 B CN110056083 B CN 110056083B CN 201910303104 A CN201910303104 A CN 201910303104A CN 110056083 B CN110056083 B CN 110056083B
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- 229920002430 Fibre-reinforced plastic Polymers 0.000 title description 69
- 239000011151 fibre-reinforced plastic Substances 0.000 title description 69
- 239000004567 concrete Substances 0.000 claims abstract description 66
- 239000002131 composite material Substances 0.000 claims abstract description 25
- 230000002457 bidirectional effect Effects 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 8
- 238000004873 anchoring Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 239000013535 sea water Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000011178 precast concrete Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a self-locking FRP profile beam column node capable of being assembled quickly, which comprises a circular FRP pipe concrete column, a box groove-shaped FRP profile concrete composite beam, a prefabricated node, a matched bolt and a clamping piece; the node is connected with the round FRP pipe concrete column in a jacket mode, connected with the box groove-shaped FRP section bar concrete composite beam in a socket mode and then anchored by bolts. The method comprises the following main construction steps: manufacturing a circular FRP pipe concrete column; manufacturing a box-shaped FRP profile concrete composite beam; and (6) installing the site nodes. Compared with common beam column nodes, the fabricated node has the advantages of simple and convenient construction, definite force transmission, no damage to the original column and the like.
Description
Technical Field
The invention belongs to the field of constructional engineering, and particularly relates to a self-locking FRP profile beam column node capable of being assembled quickly.
Background
Modern buildings face increasingly severe environments with high corrosivity, alternation of dry and wet, and the like, which poses a great threat to the durability of traditional reinforced concrete structures. In order to fundamentally avoid the problems of corrosion and the like, the steel is replaced by the high-performance composite material with good corrosion resistance, which is an effective treatment mode. The FRP material not only has light weight and high strength, but also has good corrosion resistance and strong designability, and is a good substitute material. There are many architectural applications using FRP profiles instead of steel, many of which are fabricated structural systems.
In an assembly type structure system, although the components such as beams, columns and the like are easy to realize factory production and the quality is relatively easy to guarantee, most beam-column joints are highly dependent on field wet operation, and the quality is not easy to guarantee, so that the development of the beam-column joints is severely restricted. At present, the existing assembled beam-column joint connection forms can be divided into three main categories: one is the post-pouring method connection of a precast concrete column and a precast concrete beam, the method firstly uses the cross fit of the beam column longitudinal bars at the nodes, and pours concrete after the member is hoisted in place, thereby achieving the purpose of connection; the second type is the connection of the steel tube concrete column and the precast concrete beam, which mainly comprises non-through nodes represented by reinforced ring type nodes, ring beam nodes, reinforcing steel bar surrounding type nodes and the like, and through nodes represented by bracket through nodes, reinforcing steel bar penetrating type nodes, cross plate type nodes and the like; the third type is a joint connection in an assembled steel structure, which is mainly represented by welding work and bolt connection.
The first two types of nodes have the defects of complex structure, difficult pouring and reduced bearing capacity caused by local damage of the column. And because the novel beam does not have steel bars (FRP replaces the steel bars to bear tension), the novel beam is not suitable for node connection of a novel assembly type structure system represented by FRP pipe concrete columns embedded with FRP sections and box groove-shaped FRP section concrete composite beams. Also, because the novel rapid assembly type structure system does not contain steel, the third type of node connection mode (welding and bolt connection) is not suitable.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a self-locking FRP profile beam column node capable of being assembled quickly, which is assembled on site by adopting prefabricated components, has simple structure and convenient construction, improves the construction efficiency to the maximum extent and is easy for quality control. Meanwhile, the node can not cause local damage to the column, can not affect the pouring of the concrete in the tube, can ensure the safety of the main structure to the maximum extent, and provides guarantee for the life safety of people.
In order to achieve the purpose, the invention provides a self-locking FRP profile beam column node capable of being rapidly assembled, which is characterized in that: the method comprises the steps of prefabricating nodes and circular FRP pipe concrete columns; the prefabricated node is an integrated node, and the inner wall of the prefabricated node is sleeved with the outer wall of the circular FRP pipe concrete column; the prefabricated node is vertically provided with a bidirectional conical hole, a node conical surface is arranged in the bidirectional conical hole, and the bidirectional conical hole is sleeved in the circular FRP pipe concrete column to a proper height; after the sleeving connection is finished, the top surface elevation of the prefabricated node is consistent with the designed top surface elevation of the floor slab, the error is not more than 1cm, and the connection between the subsequent beam and the node and the construction of the floor slab are facilitated;
a clamping piece assembly is arranged below the bidirectional conical hole for fixing; the clamping piece assembly is a cone which is formed by surrounding the same three clamping pieces and is matched with the conical surface of the node, and the inner side of the clamping piece assembly is provided with threads to increase the biting force; the size of the bidirectional conical hole corresponds to the size of the outer side of a cone formed by the three clamping pieces of the clamping piece assembly in a surrounding manner;
the circular FRP pipe concrete column consists of peripheral prefabricated FRP pipes, cross FRP pultrusion sections and concrete poured between the cross FRP pultrusion sections;
four convex square rings are arranged on the outer wall of the prefabricated node, and are arranged on the cross section of the prefabricated node in a cross-shaped central symmetry manner; a plurality of first bolt holes are formed in the square ring;
the combined beam also comprises four box-shaped FRP profile concrete combined beams and a plurality of matched bolts; the box-groove-shaped FRP profile concrete composite beam consists of box-groove-shaped FRP profiles and fiber concrete, and the fiber concrete is poured on the groove body at the end part of the box-groove-shaped FRP profiles;
the four box-shaped FRP profile concrete composite beams are respectively connected with four square rings through a plurality of matched bolts: the side wall of the groove body at the end part of the box groove-shaped FRP section bar concrete composite beam is provided with a plurality of second bolt holes which correspond to the first bolt holes; the square ring extends into the end groove body of the box groove-shaped FRP profile concrete composite beam and is connected with the box groove-shaped FRP profile concrete composite beam through the plurality of first bolt holes, the plurality of second bolt holes and the plurality of matched bolts;
the first bolt holes and the second bolt holes are arranged in multiple rows; the hole diameters of the first bolt hole and the second bolt hole are both r; the side hole distance M is the vertical distance between the first bolt holes in the row farthest from the center of the prefabricated node and the outer longitudinal edge of the prefabricated node; the middle hole distance m is the vertical distance between the centers of the first bolt holes in two adjacent rows; the middle hole pitch M is not less than 3 times of the aperture r, and the side hole pitch M is not less than 2 times of the aperture r so as to reduce the influence of stress concentration. Taking bolt holes on a prefabricated node as an example for explanation, wherein four mutually perpendicular directions of the node need to be connected with a prefabricated beam, so a plurality of rows of bolt holes are arranged, the rows are divided vertically, namely the row of the section, the bolt hole in the row with the farthest distance is taken as a measurement, the bolt hole in the other rows is taken as an edge hole, and the holes in the other rows are taken as middle holes; edge hole pitch refers to the vertical distance between an edge hole and the outer longitudinal edge of a node, and middle hole pitch refers to the vertical distance between holes in other rows and respective adjacent rows.
Preferably, the diameter of the matched bolt is not less than 20 mm; the thickness of the square ring is not less than the anchoring length of the matched bolt and is not less than 30 mm.
Furthermore, the prefabricated nodes, the clamping piece assemblies and the matched bolts are made of Cr-Cu-Mo special seawater corrosion resistant steel.
The invention has the following advantages and beneficial effects:
1. the node connection mode has no complex construction procedures such as welding, steel bar lapping, post-cast concrete and the like in the construction process, and the influence of uncertain factors such as artificial factors on the construction quality is reduced to the maximum extent.
2. The joint is connected with the column in a sleeved mode, so that concrete in the column cannot be irrigated in any way, local damage to the column due to joint connection cannot be caused, and the safety of the main body structure is guaranteed to the maximum extent.
3. The vertical shear force transmission mechanism of the node is similar to the anchoring mechanism of a single-hole anchor, the vertical shear force transmitted by the beam end is converted into the annular tensile force of the vertical section of the node through the clip type anchor, the advantage of good tensile property of steel is fully utilized, and meanwhile, the force transmission mechanism of the node is simple and clear.
4. The prefabricated node can be flexibly adjusted according to the position of the column, the form of the connecting part of the node and the column is completely consistent, the connecting part of the node and the beam can be respectively made into a cross shape, a straight shape, a T shape and an L shape according to the difference of the central column, the side column and the corner column, and each connecting part of the node and the beam is completely consistent, so that the factory design and the production cost are reduced.
5. The nodes are assembled on site by prefabricated parts, and dry connection methods such as clamping piece anchoring, bolt connection and the like are adopted for on-site connection, so that the method has the advantages of convenience and quickness, greatly improves the construction efficiency and has high industrialization degree.
Drawings
FIG. 1 is a diagram illustrating the overall assembly effect of the prefabricated joint according to the present invention.
Fig. 2 is a perspective view a of a node according to the present invention.
Fig. 3 is a longitudinal sectional view b of the node according to the present invention.
FIG. 4 is a transverse cross-sectional view c of a node according to the present invention.
FIG. 5 is a cross-sectional view of a precast column of the present invention.
Fig. 6 is a sectional view a of the precast beam of the present invention.
Fig. 7 is a front view b of a girder end of the precast girder according to the present invention.
In the figure: the prefabricated node comprises a prefabricated node 1, a square ring 101, a first bolt hole 102, a bidirectional conical hole 103, a circular FRP pipe concrete column 2, a prefabricated FRP pipe 201, a cross FRP pultrusion profile 202, concrete 203, a box-groove-shaped FRP profile concrete composite beam 3, fiber concrete 301, a box-groove-shaped FRP profile 302, a second bolt hole 303, a clamping piece assembly 4 and a matched bolt 5.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The self-locking FRP section beam column node capable of being rapidly assembled comprises a prefabricated node 1 and a circular FRP pipe concrete column 2; the prefabricated node 1 is an integrated node, and the inner wall of the prefabricated node 1 is sleeved with the outer wall of the circular FRP pipe concrete column 2; the prefabricated node 1 is vertically provided with a bidirectional conical hole 103, a node conical surface is arranged in the bidirectional conical hole 103, and the bidirectional conical hole 103 is sleeved in the circular FRP pipe concrete column 2;
a clamping piece component 4 is arranged below the bidirectional conical hole 103 for fixing; the clamping piece assembly 4 is a cone which is formed by surrounding the same three clamping pieces and is matched with the conical surface of the node, and the inner side of the clamping piece assembly 4 is provided with threads to increase the biting force; the size of the bidirectional conical hole 103 corresponds to the outside size of a cone surrounded by three clamping pieces of the clamping piece assembly 4;
the circular FRP pipe concrete column 2 consists of a prefabricated FRP pipe 201 at the periphery, a cross FRP pultrusion profile 202 and concrete 203 poured between the FRP pipe and the cross FRP pultrusion profile;
four convex square rings 101 are arranged on the outer wall of the prefabricated node 1, and the four convex square rings 101 are arranged on the cross section of the prefabricated node 1 in a cross-shaped central symmetry manner; a plurality of first bolt holes 102 are formed in the square ring 101;
the combined beam also comprises four box-shaped FRP profile concrete combined beams 3 and a plurality of matched bolts 5; the box-groove-shaped FRP profile concrete composite beam 3 consists of a box-groove-shaped FRP profile 302 and fiber concrete 301, and the fiber concrete 301 is poured on the groove body at the end part of the box-groove-shaped FRP profile 302;
the four box-shaped FRP profile concrete composite beams 3 are respectively connected with the four square rings 101 through a plurality of matched bolts 5: the side wall of the tank body at the end part of the tank-shaped FRP section concrete composite beam 3 is provided with a plurality of second bolt holes 303 which correspond to the first bolt holes 102; the square ring 101 extends into the end groove body of the box groove-shaped FRP profile concrete composite beam 3 and is connected with the box groove-shaped FRP profile concrete composite beam 3 through a plurality of first bolt holes 102, a plurality of second bolt holes 303 and a plurality of matched bolts 5; the first bolt holes 102 and the second bolt holes 303 are arranged in multiple rows; the apertures of the first bolt hole 102 and the second bolt hole 303 are both r; the edge hole distance M is the vertical distance between the first bolt holes 102 in the row farthest from the center of the prefabricated node 1 and the outer longitudinal edge of the prefabricated node 1; the pitch m of the middle holes is the vertical distance between the centers of the first bolt holes 102 in two adjacent rows; the middle hole pitch M is not less than 3 times of the aperture r, and the side hole pitch M is not less than 2 times of the aperture r so as to reduce the influence of stress concentration.
The diameter of the matched bolt 5 is not less than 20 mm; the thickness of the square ring 101 is not less than the anchoring length of the mating bolt 5 and not less than 30 mm. The prefabricated node 1, the clamping piece component 4 and the matched bolt 5 are made of Cr-Cu-Mo special seawater corrosion resistant steel.
The construction comprises the following steps:
manufacturing a circular FRP pipe concrete column 2: the column is composed of an outer prefabricated FRP tube 201, an inner cross-shaped FRP pultruded profile 202 and concrete 203 poured between the two. Firstly, hoisting the external prefabricated FRP pipe 201 in place to ensure the verticality of the external prefabricated FRP pipe 201, then placing the cross FRP pultrusion profile 202 inside the prefabricated FRP pipe 201, fixing the cross FRP pultrusion profile after centering correction, pouring concrete 203 and maintaining for 28 days to form the circular FRP pipe concrete column 2. The above steps are completed in the factory.
Manufacturing a box-shaped FRP (fiber reinforced Plastic) section concrete composite beam 3: firstly, an FRP box groove-shaped FRP profile 302 is manufactured, a second bolt hole 303 is reserved at the end part of the FRP box groove-shaped FRP profile, one-time prefabrication molding is carried out by adopting a pultrusion process, and then fiber concrete 301 is poured in an upper groove, so that the manufacturing of the box groove-shaped FRP profile concrete composite beam 3 is completed. The above steps are completed in the factory.
Node installation: the prefabricated node 1 is sleeved into the circular FRP pipe concrete column 2 from top to bottom to a proper height, the two-way conical hole 103 of the node is small at the top and large at the bottom, then the clamping piece assembly 4 is inserted into the two-way conical hole 103 from the bottom, downward force is applied to the prefabricated node 1, and the clamping piece assembly 4 is guaranteed not to be separated by node dead weight and thread occlusion. Placing the circular FRP pipe concrete column 2 on the upper layer into the prefabricated node 1 and placing the clamping piece assembly 4 from top to bottom; and then inserting a square ring 101 transversely protruding from the prefabricated node 1 into a box-shaped part at the lower part of the box-shaped FRP profile concrete composite beam 3, and screwing a bolt 5 by contrasting the first bolt hole 102 with the second bolt hole 303 to finish the installation.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910303104.2A CN110056083B (en) | 2019-04-16 | 2019-04-16 | Self-locking type FRP (fiber reinforced plastic) section beam column joint capable of being quickly assembled |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910303104.2A CN110056083B (en) | 2019-04-16 | 2019-04-16 | Self-locking type FRP (fiber reinforced plastic) section beam column joint capable of being quickly assembled |
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| Publication Number | Publication Date |
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| CN110056083A CN110056083A (en) | 2019-07-26 |
| CN110056083B true CN110056083B (en) | 2020-04-10 |
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| CN110984380A (en) * | 2019-12-25 | 2020-04-10 | 福建汉宏工程建设有限公司 | Steel frame structure of building and assembling method |
| CN116657761B (en) * | 2023-06-15 | 2023-11-28 | 四川省建筑设计研究院有限公司 | FRP precast beam column node with shearing connectors and construction method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FI116474B (en) * | 2001-08-28 | 2005-11-30 | Emeca Oy | Connection between pieces, such as reinforced concrete piles |
| CN101985851A (en) * | 2010-11-20 | 2011-03-16 | 大连理工大学 | A FRP-steel composite tubular concrete column |
| CN102444273B (en) * | 2011-09-19 | 2013-09-18 | 焦作建工集团有限公司 | Connecting member of socket and spigot type tenon-mortise self-locked steel pipe scaffold |
| CN204876087U (en) * | 2015-03-25 | 2015-12-16 | 甘秀明 | Annular auto -lock nodal connection structure |
| CN104989001B (en) * | 2015-06-24 | 2017-06-30 | 上海核工程研究设计院 | A kind of anti-pulling shear lo cking device |
| CN108505619A (en) * | 2017-02-24 | 2018-09-07 | 新世界中国地产有限公司 | Prefabricated structural system and assembly method thereof |
| CN106836479B (en) * | 2017-03-31 | 2022-08-23 | 浙江工业大学工程设计集团有限公司 | Assembled prestressed concrete frame structure |
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