CN216616563U

CN216616563U - Precast concrete beam column connected node

Info

Publication number: CN216616563U
Application number: CN202123361172.6U
Authority: CN
Inventors: 方有珍; 顾夏英; 高怡; 顾伟良; 顾天熊
Original assignee: Suzhou Zhonggu Building Science And Technology Co ltd
Current assignee: Suzhou Zhonggu Building Science And Technology Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-05-27
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a precast concrete beam column connection node, which comprises precast beam components, upper precast column components and lower precast column components, and is characterized in that: the concrete pouring device is provided with a node connecting piece, wherein the node connecting piece is provided with a vertically arranged square tube, the middle part of the square tube is a core area formed by pouring concrete, an upper column connecting cavity is formed above the core area, a lower column connecting cavity is formed below the core area, and at least one beam connecting piece is fixedly connected to the outer side of the square tube; the lower end of the upper prefabricated column component is inserted into the upper column connecting cavity and is fixedly connected with the upper column connecting cavity, the upper end of the lower prefabricated column component is inserted into the lower column connecting cavity and is fixedly connected with the lower column connecting cavity, a prefabricated beam end steel plate is fixed on the end face of the prefabricated beam component, and the prefabricated beam end steel plate is welded and fixed with the beam connecting piece. The beam and the column can be respectively connected by the joint connecting piece to form an assembled concrete structure system, so that the design principle of 'strong joints and weak members' is effectively realized, and the requirements on bearing capacity and deformation performance under normal use conditions and earthquake action are met.

Description

Precast concrete beam column connected node

Technical Field

The utility model relates to an assembly type building structure, in particular to a precast concrete beam column connecting node.

Background

The frame structure can provide larger space due to flexible space separation, has wider application range, and can be applied to various buildings such as markets, teaching buildings, office buildings, other public buildings and the like.

The traditional full cast-in-place structure mainly takes on-site construction operation, the industrialization degree of the production process is low, the design and construction modes are extensive, the quality of building products is not easy to guarantee, the construction efficiency is not high, the requirements of raw materials and labor force are large, and a large amount of material loss and building garbage are easy to generate. The resource and energy consumption is large, and the environmental pollution of the construction site is serious. Therefore, the traditional concrete structure cannot adapt to the new sustainable development trend of green and environmental protection.

The concrete structural members are prefabricated in a factory and assembled on site, so that the site concrete pouring construction amount can be reduced, the construction site pollution is reduced, and the construction efficiency is improved. Therefore, the fabricated concrete frame structure has been a hot spot of research in recent years. Experimental research and earthquake damage investigation of the fabricated concrete structure show that the fabricated concrete structure can have good earthquake resistance as long as the joint parts of the prefabricated components are reliably connected.

For the assembled concrete frame structure, the stress of beam column joints is complex and the construction difficulty is large, the connection mode among the prefabricated beam column components is a core technology, and the integrity and the anti-seismic performance of the whole structure are directly influenced. In order to realize the design principle of 'strong nodes and weak members', the assembling parts of the beam-column node areas need to have enough strength, rigidity and ductility, and the requirements on the bearing capacity and the deformation performance under the normal use condition and the earthquake action are met.

The Chinese invention patent CN103669596A discloses a prefabricated reinforced concrete column beam column connecting structure, which comprises a prefabricated reinforced concrete lower column, a prefabricated reinforced concrete beam and a prefabricated reinforced concrete upper column; a plurality of steel bar jacks are reserved at the top end of the prefabricated reinforced concrete lower column, and a plurality of through holes formed by corrugated steel pipes and corresponding to the steel bar jacks of the prefabricated reinforced concrete lower column are reserved in the prefabricated reinforced concrete beam; a plurality of steel bar plugs are reserved at the bottom ends of the prefabricated reinforced concrete upper columns, the steel bar plugs of the prefabricated reinforced concrete upper columns penetrate through the through holes of the prefabricated reinforced concrete beams and are inserted into the steel bar inserting holes of the prefabricated reinforced concrete lower columns, and then the splicing structure is formed through the adhesive and the joint connecting agent. In this scheme, precast beam is overall structure, can not assemble, only relies on the reinforcing bar plug to connect the plug between precast post and the precast beam and inserts the location, and the bearing capacity of connected node is poor, does not accord with the design principle of "strong node, weak component".

The Chinese invention patent CN106284655A discloses a precast concrete beam column bolt connection node, the precast concrete column of the proposal is a through-length structure, and the precast concrete beam is fixedly connected to the precast concrete column through a beam end steel plate and a plurality of long rod bolts. There is a problem in that only a structure in which a precast concrete beam is coupled to a column is given, but, for a frame structure, a precast concrete column cannot be a full length, and how to couple upper and lower precast concrete columns is not disclosed, so that its practicality is not strong.

In order to be effectively adaptive, the prefabricated concrete beam and the prefabricated concrete column are required to be assembled and connected, and beam column prefabrication assembly of a frame structure can be realized. Therefore, designing the connecting nodes thereof to ensure that the assembled parts have sufficient strength, rigidity and ductility is a technical problem to be solved in the field.

Disclosure of Invention

The utility model aims to provide a precast concrete beam column connecting node which can effectively connect a precast beam and a precast column at the connecting node and simultaneously ensure the rigidity and strength requirements of a building structure on the connecting node.

In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows: a precast concrete beam column connection node comprises a precast beam component, an upper precast column component and a lower precast column component, and is provided with a node connecting piece, wherein the node connecting piece is provided with a vertically arranged square tube, the middle part of the square tube is a core area formed by cast-in concrete, an upper column connection cavity is formed above the core area, a lower column connection cavity is formed below the core area, and at least one beam connecting piece is fixedly connected to the outer side of the square tube; the lower end of the upper prefabricated column component is inserted into the upper column connecting cavity and fixedly connected with the upper column connecting cavity, the upper end of the lower prefabricated column component is inserted into the lower column connecting cavity and fixedly connected with the lower column connecting cavity, a prefabricated beam end steel plate is fixed on the end face of the prefabricated beam component, and the prefabricated beam end steel plate and the beam connecting piece are welded and fixed.

Among the above-mentioned technical scheme, the number of roof beam connecting piece is confirmed according to the node position, if there is the roof beam respectively in both sides, then sets up a pair of roof beam connecting piece, if all there is the roof beam all around, then sets up four roof beam connecting pieces. The upper and lower columns and the surrounding beams are connected through the node connecting pieces respectively, so that the infinite expansion of the frame structure can be realized.

The preferred technical scheme, the beam connecting piece is the I-steel that perpendicular to core area side pipe curb plate set up, and the last pterygoid lamina, web and the lower pterygoid lamina of I-steel one end all with the lateral surface welded fastening of side pipe curb plate, the last pterygoid lamina, web and the lower pterygoid lamina of the I-steel other end all with precast beam end steel sheet welded fastening.

The distance between the upper wing plate and the lower wing plate of the I-steel can be equal to the height of the precast beam component, after welding and fixing, the upper surface of the upper wing plate and the lower surface of the lower wing plate of the I-steel are respectively flush with the upper surface and the lower surface of the beam, and the width of the upper wing plate and the width of the lower wing plate can be equal to the width of the precast beam component.

According to the further technical scheme, a first steel pipe is wrapped at the lower end of the upper prefabricated column component, the periphery of the first steel pipe is matched with the upper column connecting cavity, and the first steel pipe is welded and fixed with a side plate of the upper column connecting cavity in an installation state; the upper end of the lower prefabricated column component is coated with a second steel pipe, the periphery of the second steel pipe is matched with the lower column connection cavity, and the second steel pipe is welded and fixed with a side plate of the lower column connection cavity in an installation state.

According to the further technical scheme, a pair of opposite side plates of an upper column connecting cavity of a node connecting piece are respectively provided with a first limiting groove with an opening at the upper end, an upper prefabricated column component is provided with a first mounting positioning and anti-key component steel bar penetrating through a first steel pipe, and two ends of the first mounting positioning and anti-key component steel bar are respectively positioned in the first limiting grooves on the corresponding side plates and are welded and fixed with the wall of the groove; and second limiting grooves with lower ends open are respectively formed in a pair of opposite side plates of a lower column connecting cavity of the node connecting piece, second mounting, positioning and anti-key piece reinforcing steel bars penetrating through the second steel pipe are arranged on the lower prefabricated column component, and two ends of each second mounting, positioning and anti-key piece reinforcing steel bar are respectively positioned in the second limiting grooves in the corresponding side plates and are welded and fixed with the wall of the corresponding groove.

Through the structural arrangement, the connection reliability between the column member and the node connecting piece is further enhanced.

In the technical scheme, the inner sides of the four side plates of the first steel pipe and the second steel pipe are respectively welded and fixed with anchoring shear steel bars, and two ends of each anchoring shear steel bar are bent towards the interior of the column member and fixedly connected in concrete. According to circumstances, each side plate may be connected with 2 to 3 anchoring shear bars.

In the technical scheme, the precast beam component is of a reinforced concrete structure, the precast beam end steel plate is provided with a through hole, one ends of a plurality of longitudinal ribs of the precast beam component extend out of the through hole respectively, the end part of each longitudinal rib is provided with a thread, and the precast beam end steel plate is fixed by a nut connected with the thread.

According to the technical scheme, a reinforcing steel plate which is arranged in parallel with the side plates of the square pipe is arranged in the core area of the node connecting piece, and the two side edges of the reinforcing steel plate are respectively welded and fixed with the other side plate of the square pipe.

According to the technical scheme, the upper surface and the lower surface of the core area are respectively provided with a top partition plate and a bottom partition plate, the peripheries of the top partition plate and the bottom partition plate are respectively welded and fixed with the inner surfaces of four side plates of a square tube, the top partition plate forms the bottom surface of an upper column connection cavity, and the bottom partition plate forms the top surface of a lower column connection cavity.

During installation, the upper end of the lower prefabricated column component is inserted into the lower column connecting cavity of the node connecting piece, the steel structure in the lower prefabricated column component is welded and fixed, the lower end of the upper prefabricated column component is inserted into the upper column connecting cavity of the node connecting piece, the steel structure in the upper prefabricated column component is welded and fixed, and the prefabricated beam end steel plate at one end of the prefabricated beam component is welded and fixed with the beam connecting piece on the node connecting piece; and injecting glue or grouting to each connecting gap to complete the connection of the beam-column connecting nodes.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. the precast concrete beam column connecting joint is provided by arranging the joint connecting piece, and both the beam and the column can be respectively connected by the joint connecting piece, so that an assembled concrete structure is realized, and the frame structure can be effectively expanded;

2. in the utility model, the cast-in concrete is arranged in the center of the square tube of the node connecting piece to form a core area, so that the prefabricated column component and the lower prefabricated column component can be effectively separated and connected, the connecting strength of the node area is ensured, the design principle of 'strong nodes and weak components' is realized, and the requirements on bearing capacity and deformation performance under normal use conditions and earthquake action are met;

3. the beam connecting piece is welded and connected with the precast beam component, so that the strength and the rigidity of beam connection are ensured;

4. the connecting joint has high construction efficiency and good safety, can improve the construction efficiency and reduce the adverse effect of construction irregularity on the structural performance.

Drawings

Fig. 1 is a node elevation of embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is an elevational view of the node connector of FIG. 1;

FIG. 4 is a cross-sectional view B-B of FIG. 3;

FIG. 5 is a cross-sectional view C-C of FIG. 3;

FIG. 6 is a cross-sectional view taken along line D-D of FIG. 3;

FIG. 7 is a schematic view of the upper prefabricated column element of FIG. 1;

FIG. 8 is a cross-sectional view E-E of FIG. 7;

FIG. 9 is a schematic view of the lower prefabricated column unit of FIG. 1;

fig. 10 is a schematic view of the precast beam member of fig. 1.

Wherein: 1. prefabricating a beam component; 2. upper prefabricated column members; 3. lower prefabricated column members; 4. a node connecting member; 5. a square tube; 6. a core region; 7. a beam connector; 8. a top baffle; 9. a bottom partition; 10. the upper column is connected with the cavity; 11. the lower column is connected with the cavity; 12. reinforcing a steel plate; 13. a first limit groove; 14. a second limit groove; 15. an upper wing plate; 16. a web; 17. a lower wing plate; 18. a first steel pipe; 19. anchoring the shear steel bars; 20. first installation positioning and anti-key piece reinforcing steel bars; 21. a second steel pipe; 22. prefabricating a beam end steel plate; 23. and (5) longitudinal ribs.

Detailed Description

The utility model is further described with reference to the following figures and examples:

the first embodiment is as follows: referring to fig. 1, the precast concrete beam-column connection node comprises a precast beam member 1, an upper precast column member 2, a lower precast column member 3, and a node connecting member 4. The cross-sectional dimension of the concrete column in this example is 280 × 280, and the cross-sectional dimension of the concrete beam is 200 × 300. In actual manufacturing, the sizes of the following components should be adjusted accordingly according to the load requirements. The dimension units in this example are mm.

As shown in fig. 2, the joint connecting member 4 has a vertically arranged square tube 5, the middle part of the square tube 5 is a core area 6 formed by cast-in concrete, and two beam connecting members 7 are fixedly connected to two opposite side walls of the outer side of the square tube respectively.

Referring to fig. 3, which is an elevation view of a joint connection member, a square pipe 5 is formed by welding 4 steel plates of 300 × 700 × 8, cast-in concrete is provided at the middle section of the square pipe 5, and 284 × 284 × 6 steel plates, i.e., a top partition plate 8 and a bottom partition plate 9, are provided above and below the cast-in concrete, respectively, thereby surrounding and forming a core region 6. The upper space of the top baffle plate 8 forms an upper column connecting cavity 10, and the lower space of the bottom baffle plate 9 forms a lower column connecting cavity 11. In this embodiment, the height of the core region may be 300mm, so that the depth of each of the upper pillar connecting cavity and the lower pillar connecting cavity is approximately 200 mm.

Referring to fig. 4, it can be seen that a reinforced steel plate 12 is disposed in the core area 6 of the node connector and parallel to a pair of side plates of the square pipe 5, where the reinforced steel plate 12 may be 284 × 290 × 6, and two side edges thereof are respectively welded and fixed to the other pair of side plates of the square pipe.

Referring to fig. 5, a pair of opposite side plates of an upper column connection cavity 10 of the node connection member are respectively provided with a first limiting groove 13 with an open upper end, and a pair of opposite side plates of a lower column connection cavity 11 of the node connection member are respectively provided with a second limiting groove 14 with an open lower end. The depths of the first and second limiting

grooves

13 and 14 are 120mm, respectively.

As can be seen from fig. 5 and 6, the beam connector 7 is an i-beam perpendicular to the side plates of the square tube 5 in the core area, and an upper wing plate 15, a web plate 16 and a lower wing plate 17 at one end of the i-beam are welded and fixed to the outer side surface of one side plate of the square tube 5. In this embodiment, the upper wing plate 15 and the lower wing plate 17 may be made of steel plates 300 × 200 × 8, and the web 16 may be made of steel plates 300 × 284 × 8, and welded to form the i-beam-shaped beam connector 7.

Referring to fig. 7, the lower end of the upper prefabricated pillar member is wrapped with a first steel pipe 18 formed by welding 4 pieces of 280 × 282 × 6 steel plates, whereby the outer circumferential dimension of the first steel pipe 18 is fitted to the upper pillar connecting cavity 10, and in the installed state, the first steel pipe 18 is welded and fixed to the side plate of the upper pillar connecting cavity 10. In order to ensure the stable connection of the first steel pipe 18, referring to fig. 8, the inner sides of the four side plates of the first steel pipe 18 are respectively welded and fixed with anchoring shear-resistant steel bars 19, and both ends of the anchoring shear-resistant steel bars 19 are bent towards the interior of the column member and fixedly connected in the concrete.

In fig. 7, the upper prefabricated column member is provided with a first mounting, positioning and anti-key member reinforcing steel bar 20 penetrating through the first steel pipe 18, and during mounting, two ends of the first mounting, positioning and anti-key member reinforcing steel bar 20 are respectively located in the first limiting grooves 13 on the corresponding side plates and are welded and fixed with the groove walls. The first installation positioning and resisting key piece steel bar can adopt a 16-steel bar and is fixed with the steel plate through plug welding.

Referring to fig. 9, the upper end of the lower prefabricated pillar member is coated with a second steel pipe 21, which is arranged and coupled in a structure similar to that of the upper prefabricated pillar member.

Referring to fig. 10, the precast beam member is a reinforced concrete structure, and a precast beam end steel plate 22 is fixed on an end surface thereof. The precast beam end steel plate 22 is provided with a through hole, one ends of a plurality of longitudinal ribs 23 of the precast beam component respectively extend out of the through hole, the end parts of the longitudinal ribs 23 are provided with threads, and the precast beam end steel plate is fixed by nuts connected with the threads. When the precast beam component is manufactured, a reinforcement cage is firstly installed, the longitudinal ribs 23 penetrate through the precast beam end steel plates 22, the screw caps are screwed, and then concrete is poured. In order to ensure the connection strength, the steel plate at the end of the precast beam can adopt a steel plate with the thickness of 12 mm.

When the precast beam component is installed, the upper wing plate, the web plate and the lower wing plate at the other end of the I-steel of the beam connecting piece are welded and fixed with the precast beam end steel plate.

The components of this embodiment may be prefabricated at the factory and then installed on site. During installation, the upper end of the lower prefabricated column component is inserted into the lower column connecting cavity of the node connecting piece, the steel structure in the lower prefabricated column component is welded and fixed, the lower end of the upper prefabricated column component is inserted into the upper column connecting cavity of the node connecting piece, the steel structure in the upper prefabricated column component is welded and fixed, and the prefabricated beam end steel plate at one end of the prefabricated beam component is welded and fixed with the beam connecting piece on the node connecting piece; and finally, injecting glue or grouting to each connecting gap to complete the connection of the beam-column connecting nodes.

Claims

1. The utility model provides a precast concrete beam column connected node, includes precast beam component, goes up precast column component, lower precast column component, its characterized in that: the concrete pouring device is provided with a node connecting piece, wherein the node connecting piece is provided with a vertically arranged square pipe, the middle part of the square pipe is a core area formed by pouring concrete, an upper column connecting cavity is formed above the core area, a lower column connecting cavity is formed below the core area, and at least one beam connecting piece is fixedly connected to the outer side of the square pipe; the lower end of the upper prefabricated column component is inserted into the upper column connecting cavity and fixedly connected with the upper column connecting cavity, the upper end of the lower prefabricated column component is inserted into the lower column connecting cavity and fixedly connected with the lower column connecting cavity, a prefabricated beam end steel plate is fixed on the end face of the prefabricated beam component, and the prefabricated beam end steel plate and the beam connecting piece are welded and fixed.

2. A precast concrete beam-column connection node according to claim 1, wherein: the beam connecting piece is the I-steel that perpendicular to nuclear core area side pipe curb plate set up, and the last pterygoid lamina, web and the lower pterygoid lamina of I-steel one end all with the lateral surface welded fastening of side pipe curb plate, the last pterygoid lamina, web and the lower pterygoid lamina of the I-steel other end all with precast beam end steel sheet welded fastening.

3. A precast concrete beam-column connection node according to claim 1, wherein: the lower end of the upper prefabricated column component is coated with a first steel pipe, the periphery of the first steel pipe is matched with the upper column connecting cavity, and the first steel pipe is welded and fixed with a side plate of the upper column connecting cavity in an installation state; the upper end of the lower prefabricated column component is coated with a second steel pipe, the periphery of the second steel pipe is matched with the lower column connection cavity, and the second steel pipe is welded and fixed with a side plate of the lower column connection cavity in an installation state.

4. A precast concrete beam-column connection node according to claim 3, wherein: a pair of opposite side plates of an upper column connecting cavity of the node connecting piece are respectively provided with a first limiting groove with an opening at the upper end, the upper prefabricated column component is provided with a first mounting, positioning and anti-key piece steel bar penetrating through the first steel pipe, and two ends of the first mounting, positioning and anti-key piece steel bar are respectively positioned in the first limiting grooves on the corresponding side plates and are welded and fixed with the wall of the groove; and second limiting grooves with lower ends open are respectively formed in a pair of opposite side plates of a lower column connecting cavity of the node connecting piece, second mounting, positioning and anti-key piece reinforcing steel bars penetrating through the second steel pipe are arranged on the lower prefabricated column component, and two ends of each second mounting, positioning and anti-key piece reinforcing steel bar are respectively positioned in the second limiting grooves in the corresponding side plates and are welded and fixed with the wall of the corresponding groove.

5. A precast concrete beam-column connection node according to claim 3, wherein: and the inner sides of the four side plates of the first steel pipe and the second steel pipe are respectively welded and fixed with anchoring shear-resistant steel bars, and two ends of each anchoring shear-resistant steel bar are bent towards the interior of the column member and are fixedly connected in the concrete.

6. A precast concrete beam-column connection node according to claim 1, wherein: the precast beam component is of a reinforced concrete structure, a through hole is formed in the precast beam end steel plate, one ends of a plurality of longitudinal ribs of the precast beam component extend out of the through hole respectively, threads are arranged at the end parts of the longitudinal ribs, and the precast beam end steel plate is fixed by nuts connected with the threads.

7. The precast concrete beam column connection node according to claim 1, wherein: be equipped with in nodal connection spare's nuclear core area with a pair of curb plate parallel arrangement's of square pipe reinforcing steel plate, reinforcing steel plate's two sides respectively with another pair of curb plate welded fastening of square pipe.

8. A precast concrete beam-column connection node according to claim 7, wherein: the upper and lower surface of nuclear core district is provided with a baffle and end baffle respectively, top baffle and end baffle all around respectively with four curb plate internal surface welded fastening of side pipe, the bottom surface in top baffle constitution upper prop connection chamber, end baffle constitutes the top surface in lower prop connection chamber.

9. A precast concrete beam-column connection node according to claim 1, wherein: the two opposite side walls of the node connecting piece are respectively connected with a beam connecting piece, or the four side walls of the node connecting piece are respectively connected with a beam connecting piece.