Prefabricated reinforced concrete steel beam connecting joint

Abstract

The utility model discloses a prefabricated reinforced concrete steel beam connecting node which comprises a concrete column and an H-shaped steel beam, channel steel and longitudinal bars are pre-buried in the concrete column, the channel steel is arranged in a pairwise opposite mode and connected through prestressed bars, bolt holes and longitudinal bar reserved holes are formed in the channel steel, and the longitudinal bars are arranged in the bolt holes. The longitudinal bars penetrate through the longitudinal bar reserved holes to be connected with the channel steel in a welded mode, and the H-shaped steel beams are connected with the channel steel in a locked mode through high-strength bolts penetrating through the bolt holes. According to the prefabricated reinforced concrete steel beam connecting joint, the channel steel is arranged in the prefabricated reinforced concrete and connected through the prestressed tendons, the shearing resistance of the channel steel web and the prestressed tendons is fully played, the stable working performance of beam column joints is improved, meanwhile, field splicing is convenient, the construction period is short, and the influence of the environment is small; and manpower and material resources are reduced, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to a concrete steel beam connection node, in particular to a prefabricated reinforced concrete steel beam connection node. Background Art

[0002] In recent years, prefabricated frame structures have been widely adopted in many parts of my country. Prefabricated structures are gaining increasing attention due to their unique advantages: ① High-quality components are unaffected by weather, allowing for standardized, mass-produced production and greater reliability; ② Energy-saving and environmentally friendly prefabricated buildings reduce unnecessary material loss during construction and reduce on-site construction waste; ③ Shortened construction timelines, as components eliminate some process steps and are shipped directly from the production workshop to the site for assembly; and ④ Labor-saving, as components are directly manufactured in the factory, reducing labor requirements and lowering the workload for construction workers. Reliable connections and superior seismic performance are currently the core areas of seismic research on prefabricated structural components.

[0003] At present, the research status of prefabricated frame beam-column joints is as follows: grouting sleeve connection; cross-section steel is used for connection in the beam-column joint area; steel plates are placed outside the joint and connected with tension bolts; H-shaped steel is placed in the core area of the joint, and channel steel or H-shaped steel is extended along the beam direction, and the channel steel or H-shaped steel is welded to the internal H-shaped steel. Although the above prefabricated frame beam-column joints have excellent seismic performance, they do have certain disadvantages: for example, the grouting sleeve connection has grouting quality defects, which causes mechanical instability at the joint; the use of through-section steel increases the amount of steel used and is relatively expensive; the connection through embedded steel plates and tension bolts cannot ensure that the tension bolt rod will deform under load and cannot be pulled out, or the mechanical performance will deteriorate; the connection between internally placed steel and externally extended channel steel and H-shaped steel has stress concentration at the internal welds, which is prone to fracture, resulting in a decrease in mechanical performance.

[0004] As can be seen from the above, traditional cast-in-place frame beams and columns are large in size, have low space utilization, and have a long construction period, wasting a lot of manpower and material resources. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a prefabricated reinforced concrete steel beam connection node, which can improve the stable working performance of the beam-column node, and at the same time is convenient for on-site splicing, has a short construction period, is less affected by the environment, reduces the use of manpower and material resources, and saves costs.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide a prefabricated reinforced concrete steel beam connection node, including a concrete column and an H-steel beam, wherein channel steel and longitudinal reinforcement are pre-embedded in the concrete column, the channel steels are arranged opposite to each other and connected by prestressed reinforcement, bolt holes and longitudinal reinforcement reserved holes are opened on the channel steel, the longitudinal reinforcement is welded to the channel steel through the longitudinal reinforcement reserved holes, and the H-steel beam is locked and connected to the channel steel by high-strength bolts passing through the bolt holes.

[0007] In the above-mentioned prefabricated reinforced concrete steel beam connection node, the channel steel includes a channel steel web and two parallel channel steel end plates, and the two channel steel end plates and the channel steel web are vertically connected to form a semi-enclosed structure.

[0008] The above-mentioned prefabricated reinforced concrete steel beam connection node, wherein the bolt holes and longitudinal reinforcement reserved holes are distributed on the channel steel end plate, the longitudinal reinforcement reserved holes are close to the channel steel web side, the channel steel web is provided with prestressed tendon holes, and the prestressed tendons pass through the prestressed tendon holes.

[0009] In the above-mentioned prefabricated reinforced concrete steel beam connection node, there are four channel steels, which are distributed crosswise in pairs. Internal stirrups are provided on the inner sides of the channel steel webs of the four channel steels, and external stirrups are provided on the outer sides of the channel steel webs of the four channel steels.

[0010] In the above-mentioned prefabricated reinforced concrete steel beam connection node, angle steel is provided at the connection between the channel steel end plate and the channel steel web, and the angle steel is located in the middle position inside the channel steel web.

[0011] In the above-mentioned prefabricated reinforced concrete steel beam connection node, the angle steel is welded to the channel steel, and the top corner of the angle steel coincides with the concrete column.

[0012] Compared with the existing technology, the present invention has the following beneficial effects: the prefabricated reinforced concrete steel beam connection node provided by the present invention embeds the channel steel into the prefabricated reinforced concrete and connects it through prestressed tendons, fully exerts the shear resistance of the channel steel web and prestressed tendons, improves the stable working performance of the beam-column node, and at the same time, it is convenient to splice on site, has a short construction period, is less affected by the environment, reduces the use of manpower and material resources, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the connection node structure of the prefabricated reinforced concrete steel beam of the utility model;

[0014] Figure 2 This is a schematic diagram of the connection positions of the components in the core area of the node of the utility model;

[0015] Figure 3a This is a top view of the position of the channel steel and stirrups in the concrete steel beam connection node of the utility model;

[0016] Figure 3b This is a schematic diagram of the connection between channel steel and stirrups in the concrete steel beam connection node of the utility model;

[0017] Figure 4a This is a top view of the position of the channel steel and prestressed tendons in the concrete steel beam connection node of the utility model;

[0018] Figure 4b This is a schematic diagram of the connection between channel steel and prestressed tendons in the concrete steel beam connection node of the utility model.

[0019] The following are marked in the figure:

[0020] 1 Concrete column 2 H steel beam 3 High-strength bolts

[0021] 4 Channel steel 5 Longitudinal reinforcement 6 Prestressed reinforcement

[0022] 7 External stirrups 8 Angle steel 9 Internal stirrups

[0023] 10 Prestressed tendon hole 11 Bolt hole 12 Longitudinal reinforcement hole

[0024] 41 Channel steel web 42 Channel steel end plate DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the connection node structure of the prefabricated reinforced concrete steel beam of the utility model; Figure 2 This is a schematic diagram of the position and connection of each component in the core area of the node of the utility model.

[0027] See Figure 1 and Figure 2 The prefabricated reinforced concrete steel beam connection node provided by the utility model includes a concrete column 1 and an H-steel beam 2, wherein channel steel 4 and longitudinal reinforcement 5 are embedded in the concrete column 1, and the channel steels 4 are arranged opposite to each other in pairs and connected by prestressed reinforcement 6 to transmit shear force and bending moment; bolt holes 11 and longitudinal reinforcement reserved holes 12 are opened on the channel steel 4, and the longitudinal reinforcement 5 is welded to the channel steel 4 through the longitudinal reinforcement reserved holes 12, and the H-steel beam 2 is locked and connected to the channel steel 4 by high-strength bolts 3 passing through the bolt holes 11.

[0028] The utility model provides a prefabricated reinforced concrete steel beam connection node, where there is a certain distance between the channel steels 4 for the placement of stirrups; the number of the channel steels 4 is four, and the two are arranged in a cross-shaped manner. The inner side of the channel steel web 41 of the four channel steels 4 is provided with inner stirrups 9, and the outer side of the channel steel web 41 of the four channel steels 4 is provided with outer stirrups 7. Figure 3a and Figure 3bAs shown. As a preferred embodiment, the channel steel 4 includes a channel steel web 41 and two parallel channel steel end plates 42. The two channel steel end plates 42 and the channel steel web 41 are vertically connected to form a semi-enclosed structure; the bolt holes 11 and the longitudinal reinforcement holes 12 are distributed on the channel steel end plates 42. The longitudinal reinforcement holes 12 are close to the side of the channel steel web 41. The channel steel web 41 is provided with prestressed tendon holes 10, and the prestressed tendons 6 pass through the prestressed tendon holes 10. Figure 4a and Figure 4b shown.

[0029] Since the bending moment of the beam end near the core area of the beam-column node is large when it is under stress, in order to ensure that the right-angle connection of the channel steel 4 does not deform under stress, measures are taken to weld an angle steel 8 in the middle of the right angle of the channel steel 4, that is, an angle steel 8 is provided at the connection between the channel steel end plate 42 and the channel steel web 41, and the angle steel 8 is located in the middle position on the inner side of the channel steel web 41, thereby ensuring that the channel steel 4 is stable under stress.

[0030] This prefabricated assembly can be quickly connected to form special-shaped columns. The specific process is as follows:

[0031] 1) When prefabricating this beam-column joint, first place the longitudinal reinforcement 5, outer stirrups 7, and inner stirrups 9 in the core area of the joint. Then, position the channel steel 4 in a fixed position and tension the prestressing reinforcement 6. The longitudinal reinforcement 5 is welded to the pre-buried channel steel 4 through the reserved longitudinal reinforcement holes 12. Angle steel 8 must be securely welded to the channel steel 4 in advance. The top corner of the angle steel 8 overlaps with the precast concrete column 1 (to prevent the concrete from being crushed at the junction of the channel steel 4 and the concrete column 1).

[0032] 2) During on-site splicing, the H-shaped steel 2 and the channel steel 4 are bolted together using high-strength bolts 3.

[0033] The prefabricated reinforced concrete steel beam connection node provided by the utility model improves the space utilization rate of the frame structure, the construction efficiency, shortens the construction period, saves manpower and material resources, and avoids the adverse effects of process and other factors on the structure. The specific advantages are as follows:

[0034] 1. The new type of prefabricated reinforced concrete steel beam connection node connected by prestressed steel channel steel adopts bolt connection on the construction site, which greatly improves the construction progress and has high construction efficiency.

[0035] 2. This new beam-column joint is prefabricated and bolted on-site, reducing formwork usage and labor. It also offers high reusability (if a steel beam becomes unusable, it can be replaced simply by removing the bolts). Compared to traditional reinforced concrete beams, this connection method reduces on-site labor and material resources, significantly reducing material waste and saving significant costs.

[0036] 3. Compared with the traditional reinforced concrete frame beam-column node, this new type of beam-column node has built-in channel steel, which is connected by prestressed steel bars. It fully utilizes the shear resistance of the channel steel web and prestressed steel bars, while ensuring the stable force transmission in the core area of the node, and maximizes the mechanical properties of steel and prestressing; making this new type of node have more reliable and stable performance.

[0037] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make slight modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.

Claims

1. A prefabricated reinforced concrete steel beam connection node, comprising a concrete column (1) and an H-steel beam (2), characterized in that: Channel steel (4) and longitudinal reinforcement (5) are embedded in the concrete column (1). The channel steels (4) are arranged opposite to each other in pairs and connected via prestressed reinforcement (6). Bolt holes (11) and longitudinal reinforcement reserved holes (12) are provided on the channel steel (4). The longitudinal reinforcement (5) passes through the longitudinal reinforcement reserved holes (12) and is welded to the channel steel (4). The H-steel beam (2) is locked and connected to the channel steel (4) by high-strength bolts (3) passing through the bolt holes (11).

2. The prefabricated reinforced concrete steel beam connection node according to claim 1, characterized in that: The channel steel (4) comprises a channel steel web (41) and two parallel channel steel end plates (42), wherein the two channel steel end plates (42) and the channel steel web (41) are vertically connected to form a semi-enclosed structure.

3. The prefabricated reinforced concrete steel beam connection node according to claim 2, characterized in that: The bolt holes (11) and the longitudinal reinforcement holes (12) are distributed on the channel steel end plate (42), the longitudinal reinforcement holes (12) are close to the channel steel web (41), the channel steel web (41) is provided with prestressed reinforcement holes (10), and the prestressed reinforcement (6) passes through the prestressed reinforcement holes (10).

4. The prefabricated reinforced concrete steel beam connection node according to claim 2, characterized in that: The number of the channel steels (4) is four, and they are arranged in a cross-shaped pattern in pairs. Inner stirrups (9) are provided on the inner sides of the channel steel webs (41) of the four channel steels (4), and outer stirrups (7) are provided on the outer sides of the channel steel webs (41) of the four channel steels (4).

5. The prefabricated reinforced concrete steel beam connection node according to claim 2, characterized in that: An angle steel (8) is provided at the connection between the channel steel end plate (42) and the channel steel web (41), and the angle steel (8) is located at a middle position inside the channel steel web (41).

6. The prefabricated reinforced concrete steel beam connection node according to claim 5, characterized in that: The angle steel (8) is welded to the channel steel (4), and the top corner of the angle steel (8) coincides with the concrete column (1).

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