CN221919813U - A rigid connection node structure between a steel secondary beam and a PC main beam - Google Patents

Abstract

The utility model discloses a rigid connection node structure of a steel secondary beam and a PC main beam, which belongs to the technical field of industrial and civil buildings and comprises a PC main beam and a steel secondary beam, wherein the steel secondary beam is an I-shaped steel structure beam formed by a web plate, an upper flange and a lower flange, a steel support for arranging two opposite steel secondary beams is pre-buried on the PC main beam, a lap joint structure which is placed on the steel support is arranged at the corresponding end of the steel secondary beam facing the PC main beam, the upper flange of the steel secondary beam is longer than the lower flange, butt welding seams are formed on the top surfaces of the PC main beams on the upper flanges of the two opposite steel secondary beams, and lower end welding seams are respectively formed between the lower flanges of the two opposite steel secondary beams and the steel support. The rigid connection node structure realizes reliable connection and accurate positioning of the steel secondary beam and the PC main beam, and has high rigidity and strong integrity.

Description

A rigid connection node structure between a steel secondary beam and a PC main beam

Technical Field

The utility model belongs to the technical field of industrial and civil construction, and provides a rigid connection node structure of a steel secondary beam and a PC main beam.

Background Art

Traditional cast-in-place construction refers to the pouring of reinforced concrete at the construction site. This construction method has high flexibility and can make design changes and adjustments according to actual needs. However, the disadvantages of the cast-in-place construction method are that the construction period is long, a large amount of labor is required, and the environment and noise pollution to the construction site are large. Prefabricated construction refers to the prefabrication of various components in the building structure in the factory and then transporting them to the construction site for assembly. This construction method has a high degree of industrialization, which can greatly shorten the construction period and improve construction efficiency, while causing less environmental pollution to the construction site. With the development of social economy and people's attention to environmental protection, prefabricated buildings have gradually received more and more attention and application. The Chinese government has also introduced a series of policies to promote the development of prefabricated buildings, making it an important development direction for the construction industry.

PC is the abbreviation of precast concrete. The connection method between steel secondary beams and PC main beams has been piloted in logistics buildings and office buildings. At present, in the conventional connection node practices, there are more hinged connections and fewer rigid connections. Some connection methods are constructed by reserving notches and grooves in the precast concrete main beam. This practice will cause the precast main beam to be partially weakened, prone to cracking during the hoisting and installation process, and the support-free capacity of the beam will be greatly reduced.

Utility Model Content

In view of this, the purpose of the utility model is to provide a rigid connection node structure between a steel secondary beam and a PC main beam to solve the problems of low construction efficiency, great construction difficulty, poor structural reliability and poor support-free capacity.

In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.

The utility model provides a rigid connection node structure of a steel secondary beam and a PC main beam, comprising a PC main beam and a steel secondary beam, wherein the steel secondary beam is an I-shaped steel structure beam consisting of a web, an upper flange and a lower flange, a steel support for arranging two opposite steel secondary beams is pre-embedded on the PC main beam, a lap structure placed on the steel support is arranged at the corresponding end of the steel secondary beam facing the PC main beam, the upper flange of the steel secondary beam is longer than the lower flange, and the upper flanges of the two opposite steel secondary beams form a butt weld on the top surface of the PC main beam, and the lower flanges of the two opposite steel secondary beams form lower end welds with the steel support respectively.

With the above scheme, a steel support for setting two opposite steel secondary beams is embedded in the PC main beam. The corresponding ends of the two opposite steel secondary beams are provided with a lap joint structure placed on the steel support for connection with the steel support. The upper flanges of the two opposite steel secondary beams form a butt weld on the top surface of the PC main beam, and the two opposite steel secondary beams are rigidly connected by welding. The lower flanges of the two opposite steel secondary beams are respectively formed with lower end welds with the steel support, and the steel secondary beams are stably connected to the steel support by welding. Using this rigid connection node structure, the steel secondary beam and the PC main beam can be rigidly connected, improving the stability and bearing capacity of the connection. At the same time, the composition of the structure is simple, the installation process is relatively easy, and it can effectively solve the problems of low construction efficiency and high construction difficulty in the traditional connection method. This structure can be used in prefabricated buildings to promote the development of prefabricated buildings.

Optionally, the upper flange of the steel secondary beam is provided with studs combined with the floor slab. Such studs firmly connect the upper flange of the steel secondary beam with the floor slab to form a more stable structure. The use of studs can effectively improve the shear and anti-slip capabilities of the connection and ensure the reliability and safety of the connection.

Optionally, the steel secondary beam is a variable cross-section structure, and the upper flange is narrower than the lower flange. The steel secondary beam with such a variable cross-section structure can meet the overall structural requirements of the rigid connection node structure by adjusting the cross-sectional shape and size, thereby providing more suitable stress performance, such as increasing bending resistance or reducing weight.

Optionally, the PC main beam includes main beam longitudinal reinforcement, main beam stirrups and notches for avoiding the butt welding of the upper flanges of two opposite steel secondary beams. In the design of the PC main beam, the main beam longitudinal reinforcement and stirrups are used to provide force support and reinforcement for the main beam. The PC main beam adopts a notched section, that is, a notch is provided, which can provide sufficient operating space for the butt welding of adjacent upper flanges of the steel secondary beams, while improving the overall connection performance of the node area.

Optionally, the overlap structure is composed of a first stiffening plate, a first connecting plate, a second stiffening plate, and a second connecting plate. The second connecting plate is arranged at the outer end of the web of the steel secondary beam and is perpendicular to the upper flange and the web, and the first connecting plate is arranged on at least one side of the web and is perpendicular to the second connecting plate and the web. The second stiffening plate and the first stiffening plate are arranged on the first connecting plate and are perpendicular to the upper flange and the lower flange, respectively. The design of this overlap structure can provide additional reinforcement and support, and enhance the overall rigidity and bearing capacity of the steel secondary beam. The arrangement of the first stiffening plate, the first connecting plate, the second stiffening plate, and the second connecting plate can form a stable overlap structure, making the connection between the steel secondary beam and the PC main beam more secure.

Optionally, the first connecting plate, the first stiffening plate, the second stiffening plate and the second connecting plate are all integrated on the steel secondary beam. Such a design can simplify the structure of the steel secondary beam, reduce the number of connecting components, and improve the efficiency of construction and the stability of the connection. By integrating these connecting components on the steel secondary beam, a tighter connection can be achieved, and the rigidity and bearing capacity of the overall structure can be improved.

Optionally, the steel support is composed of an embedded steel plate, anchor bars, a third stiffening plate, and a third connecting plate. Two embedded steel plates are provided, corresponding to two opposite steel secondary beams, and multiple anchor bars are provided between the two embedded steel plates. A third connecting plate for a lap joint structure is provided on the corresponding surface of a single embedded steel plate facing the steel secondary beam, and the first connecting plate is placed on the surface and perpendicular to the embedded steel plate, and a third stiffening plate is provided between the embedded steel plate and the third connecting plate. This design can achieve a firm connection and support between the steel support and the steel secondary beam. The provision of the embedded steel plate provides additional reinforcement and support, and the steel support is fixed to the steel secondary beam through the action of the anchor bars. The provision of the first connecting plate enables the steel support to be tightly connected to the lap joint structure, and the rigidity and stability of the entire support are increased through the third connecting plate and the third stiffening plate.

Optionally, the third connecting plate, the third stiffening plate, and the embedded steel plate are all integrated on the PC main beam. Similarly, such a design can simplify the structure of the PC main beam, reduce the number of connecting parts, and improve the efficiency of construction and the stability of the connection. Integrating the third connecting plate, the third stiffening plate, and the embedded steel plate on the PC main beam can achieve a tighter connection and improve the rigidity and bearing capacity of the overall structure.

The beneficial effects of the utility model are:

1. Reliable connection and accurate positioning: This rigid connection node structure realizes the reliable connection and accurate positioning of the steel secondary beam and the PC main beam. The node has high rigidity and strong integrity, which can ensure the firmness and stability of the connection.

2. Does not affect the rigidity and support-free capability of the main beam: This rigid connection node structure does not require slots or openings on the PC main beam, so it does not reduce the overall rigidity and support-free capability of the main beam. This makes the node structure highly applicable.

3. Improve the rigidity of the structure and nodes: This rigid connection node structure significantly improves the rigidity of the structure and nodes between the steel secondary beam and the PC main beam. This helps to reduce the bending moment load in the beam span, and makes the steel secondary beam more evenly stressed, which can give full play to the role of the beam section.

4. Save materials and reduce costs: This rigid connection node structure is connected to the concrete wing plate through the welding studs on the upper flange of the steel secondary beam to form a composite beam structure. In this way, the load can be shared, achieving the effect of saving materials, reducing costs, and reducing the deadweight of the structure. The reliability of the connection structure is also improved.

5. Reduce construction difficulty and shorten construction period: This rigid connection node structure effectively reduces construction difficulty and shortens construction period while ensuring construction quality. This meets the requirements of the era of low-carbon society and green building for project management.

In summary, the rigid connection node structural design of the utility model realizes the rigid connection of the node between the steel secondary beam and the PC main beam through technical effects such as simple structure, reasonable force and quick installation, and has high reliability, economy and construction efficiency in practical applications.

Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

FIG1 is a three-dimensional structural schematic diagram of a rigid connection node structure of a steel secondary beam and a PC main beam of the utility model;

Fig. 2 is a cross-sectional view of the A-A section in Fig. 1;

FIG3 is a schematic diagram of the steel support structure in FIG1 ;

Figure markings: 1-PC main beam, 2-steel secondary beam, 3-lap structure, 4-steel support, 5-floor slab, 6-bolt, 7-butt weld, 8-lower end weld; 11-main beam longitudinal reinforcement, 12-main beam stirrups, 13-notch; 21-web, 22-upper flange, 23-lower flange; 31-first stiffening plate, 32-first connecting plate, 33-second stiffening plate, 34-second connecting plate; 41-embedded steel plate, 42-anchor bar, 43-third stiffening plate, 44-third connecting plate.

DETAILED DESCRIPTION

The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limiting this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

Please refer to Figures 1 to 3, which show a rigid connection node structure of a steel secondary beam and a PC main beam, including a PC main beam 1 and a steel secondary beam 2. The PC main beam 1 is prefabricated in a factory or on site, and a steel support 4 is reserved thereon. The steel support 4 is composed of a third stiffening plate 43, a third connecting plate 44, an embedded steel plate 41, and anchor bars 42; the steel secondary beam 2 adopts an I-shaped steel structure beam, and a stud 6 is arranged on the top of the steel secondary beam 2 to resist shearing. A lap joint structure 3 is arranged at the end of the steel secondary beam 2 to cooperate with the steel support 4, and is composed of a first stiffening plate 31, a first connecting plate 32, a second stiffening plate 33, and a second connecting plate 34, which are used to be reliably placed on the steel support 4. The upper flanges 22 of the two opposite steel secondary beams 2 are welded to each other at the top of the PC main beam 1 through a butt weld 7, and the lower flanges 23 of the two opposite steel secondary beams 2 are respectively connected to the embedded plates 41 on both sides of the steel support 4 through lower end welds 8. The PC main beam 1 adopts a notched cross section, that is, a notched groove 13 is provided on its top, which can provide sufficient operating space for the butt welding of the adjacent upper flanges of the two opposite steel secondary beams 2, and improve the overall connection performance of the node area. This rigid connection realizes the reliable connection and accurate positioning of the steel secondary beam and the PC main beam, and the node structure has high rigidity and strong integrity. At the same time, this method does not require slotting or opening on the PC main beam, and will not reduce the overall rigidity and support-free capacity of the main beam.

In this embodiment, the third connecting plate 44, the third stiffening plate 43, the embedded steel plate 41, and the anchor bar 42 are all integrated on the PC main beam 1, and the first connecting plate 31, the first stiffening plate 32, the second stiffening plate 33, and the second connecting plate 34 are all integrated on the steel secondary beam 2. They are all manufactured in advance in the factory or on site to improve construction efficiency.

In this embodiment, the connection between the steel secondary beam 2 and the PC main beam 1 is a rigid connection, and the bending moment needs to be effectively connected to the upper and lower flanges of the steel secondary beam and the PC main beam. The upper flanges of two adjacent steel secondary beams are butt-welded at the notch above the PC main beam, and the lower flange of the steel secondary beam is connected to the embedded steel plate by butt welding.

In this embodiment, the upper flange 22 of the steel secondary beam 2 is provided with studs 6 combined with the floor slab 5. In this way, the studs are provided on the upper flange of the steel secondary beam to form a composite beam structure with the cast-in-place floor slab.

In this embodiment, anchor bars 42 are arranged in the PC main beam 1 and between two relatively arranged pre-embedded steel plates 41, that is, the pre-embedded steel plates 41 are embedded when the PC main beam 1 is prefabricated, and the pre-embedded steel plates on both sides are connected as a whole by perforating and plug welding with anchor bars 42 made of steel bars, and the strength of the prefabricated PC main beam 1 between the two relatively embedded steel plates is reinforced by the anchor bars 42, and the third stiffening plate 43 is arranged between the third connecting plate 44 and the embedded steel plate 41. The third connecting plate 44 and the third stiffening plate 43 are welded to the embedded steel plate 41 as a whole, and the third stiffening plate 43 bears the shear force at the end of the steel secondary beam. The third connecting plate 44 is used to set up the second connecting plate 34.

In this embodiment, the steel secondary beam 2 adopts a variable cross-section structure, that is, the upper flange 22 of the steel secondary beam 2 is narrower than the lower flange 23, which can save steel and facilitate the installation of the steel secondary beam.

The following are the detailed steps of the construction method of the rigid connection node structure between the steel secondary beam and the PC main beam:

Fabrication of steel secondary beams: According to the design dimensions, the steel secondary beams with the first stiffening plate, the second stiffening plate, the first connecting plate and the second connecting plate are fabricated in the factory or on site. Ensure that the steel secondary beams meet the design requirements and quality standards.

Fabrication of PC main beam: According to the design dimensions, a PC main beam with a steel support consisting of a third connecting plate, a third stiffening plate, an embedded steel plate and anchor bars is fabricated in the factory or on site. Ensure that the position and dimensions of the embedded components are accurate.

Hoisting PC main beam: During on-site construction, the prefabricated PC main beam is first hoisted to the designated position using a crane or other equipment to ensure the horizontality and accurate position of the main beam.

Installation: Place the two steel secondary beams on the steel supports on both sides of the PC main beam to ensure a firm connection between the steel secondary beams and the supports.

Welding upper flange: The relative upper flanges of two adjacent steel secondary beams are welded center-on-center to ensure the quality and strength of the welded joint.

Welding lower flange: Weld the relative lower flanges of two adjacent steel secondary beams to the embedded steel plates respectively to ensure the quality and strength of the welded joints.

Laying floor decking or composite slabs: Lay floor decking or composite slabs on top of the steel secondary beams to ensure a firm connection between them and the steel secondary beams.

Casting the top of the PC main beam: After completing the above work, cast the post-casting area on the top of the PC main beam as a whole to ensure the pouring quality and integrity of the concrete.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims (8)

1. The steel secondary beam and PC girder rigid connection node structure comprises a PC girder (1) and a steel secondary beam (2), wherein the steel secondary beam is an I-shaped steel structure beam formed by a web plate (21), an upper flange (22) and a lower flange (23), and is characterized in that a steel support (15) for arranging two opposite steel secondary beams is pre-buried on the PC girder, a lap joint structure which is placed on the steel support is arranged at the corresponding end of the steel secondary beam facing the PC girder, the upper flange (22) of the steel secondary beam is longer than the lower flange (23), butt welding seams (7) are formed on the top surfaces of the PC girders on the upper flanges of the two opposite steel secondary beams, and lower end welding seams (8) are formed on the lower flanges of the two opposite steel secondary beams and the steel support respectively.

2. The steel secondary beam and PC main beam rigid connection node construction according to claim 1, characterized in that the upper flange of the steel secondary beam is provided with studs (6) in combination with the floor slab (5).

3. The steel secondary beam to PC main beam rigid connection node construction of claim 1 wherein the steel secondary beam is of variable cross-section construction and the upper flange is narrower than the lower flange.

4. The steel secondary beam and PC main beam rigid connection node structure according to claim 1, characterized in that the PC main beam comprises a main beam longitudinal bar (11), a main beam stirrup (12) and a notch groove (13) for avoiding butt welding of upper flanges of two opposite steel secondary beams.

5. The steel secondary beam and PC main beam rigid connection node structure according to claim 1, wherein the lap joint structure is composed of a first stiffening plate (31), a first connecting plate (32), a second stiffening plate (33) and a second connecting plate (34), the second connecting plate is arranged at the outer end of the web of the steel secondary beam and perpendicular to the upper flange and the web, the first connecting plate is arranged at least one side of the web and perpendicular to the second connecting plate and the web, and the second stiffening plate and the first stiffening plate are arranged on the first connecting plate and perpendicular to the upper flange and the lower flange respectively.

6. The steel secondary beam and PC main beam rigid connection node construction of claim 5, wherein the first, second and second connection plates are all integrated on the steel secondary beam.

7. The steel secondary beam and PC main beam rigid connection node structure according to claim 5 or 6, characterized in that the steel support is composed of two pre-buried steel plates (41), anchor bars (42), a third stiffening plate (43) and a third connecting plate (44), the pre-buried steel plates are respectively corresponding to two opposite steel secondary beams, a plurality of anchor bars are arranged between the two pre-buried steel plates, a first connecting plate for overlapping structure is arranged on the corresponding surface of a single pre-buried steel plate facing the steel secondary beam, the third connecting plate is perpendicular to the pre-buried steel plate, and a third stiffening plate is arranged between the pre-buried steel plate and the third connecting plate.

8. The steel secondary beam and PC main beam rigid connection node structure of claim 7 wherein the third connection plate, the third stiffening plate, and the pre-buried steel plate are all integrated on the PC main beam.