A fabricated steel-concrete composite structure
By setting a chute and a precast steel mesh in the receiving groove formed by the web and flange of the H-steel, and combining it with a self-compacting concrete pouring layer and a butt fixing structure, the problems of low construction efficiency and insufficient shear resistance of prefabricated steel-concrete composite structures are solved, and efficient steel-concrete interface bonding and stable connection are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SANJIANG UNIVERSITY
- Filing Date
- 2025-08-25
- Publication Date
- 2026-07-14
AI Technical Summary
Existing prefabricated steel-concrete composite structures suffer from problems such as large amounts of wet work on-site during construction, low degree of prefabrication, poor bonding effect between steel and concrete interfaces, limited shear resistance, easy peeling, and insufficient connection stability and convenience, which affect construction efficiency and overall load-bearing performance.
The H-steel web and H-steel flange form a receiving groove, with a sliding groove connecting the precast concrete side sealing plate and the precast steel mesh. The groove is filled with a self-compacting concrete pouring layer and is quickly connected by a butt-fitting fixing structure, which enhances the interfacial bonding and synergistic stress between steel and concrete.
It significantly reduces on-site wet work, increases the degree of prefabrication, enhances the bond between steel and concrete, improves shear resistance and connection stability, and ensures construction efficiency and overall mechanical properties.
Smart Images
Figure CN224495589U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building structure technology, and in particular to a prefabricated steel-concrete composite structure. Background Technology
[0002] Prefabricated steel-concrete composite structures combine high strength and durability through the synergistic stress distribution of steel and concrete, making them widely used in construction engineering. In contrast, existing steel-concrete composite structures are formed by welding steel bars or flat steel into an H-shaped steel cavity and then pouring concrete. They are commonly used for floor beams, trusses, slabs, columns, etc. in buildings.
[0003] H-beams consist of flanges and webs. Flanges can increase the bending resistance of H-beams. However, H-beams have weak and strong axes. The direction parallel to the flange is the strong axis direction, and the direction perpendicular to the flange is the weak axis direction. The shear resistance of the weak axis is poor, which leads to the poor shear resistance of prefabricated steel-concrete composites.
[0004] An existing patent (publication number: CN219622107U) discloses a prefabricated steel-concrete composite structure. This utility model has a first stirrup, a main longitudinal bar and a second longitudinal bar. After the concrete is poured, the three bars form a whole skeleton steel bar. When subjected to shear force, the shear force can be distributed more evenly, thereby increasing the shear resistance of the steel-concrete composite structure.
[0005] Existing patents offer solutions to the aforementioned problems, but the prefabricated steel-concrete composite structures proposed in these patents have several issues. For example, the amount of wet work on-site during construction is large, and the degree of prefabrication is low, resulting in low construction efficiency and difficulty in meeting the needs of rapid construction. The interface bonding between steel and concrete is poor, lacking an effective mechanical interlocking structure, which can easily lead to delamination under dynamic loads, thus affecting the overall stress performance. The shear resistance is relatively simple, mainly relying on the steel reinforcement cage to distribute shear force, without fully utilizing the synergistic effect of the steel-concrete interface, which may cause relative slippage between steel and concrete, leading to local shear failure. In addition, the stability and convenience of the connection during component docking need to be improved, which may affect the overall installation quality and efficiency of the structure.
[0006] To address this, a prefabricated steel-concrete composite structure is proposed. Utility Model Content
[0007] The purpose of this utility model is to provide a prefabricated steel-concrete composite structure that can solve some problems existing in the prefabricated steel-concrete composite structures proposed in the above-mentioned patents. For example, the large amount of wet work on site during construction and the low degree of prefabrication lead to low construction efficiency and difficulty in meeting the needs of rapid construction. The interface bonding effect between steel and concrete is poor, lacking an effective mechanical interlocking structure. Under dynamic loads, peeling is prone to occur, which affects the overall stress performance. The shear resistance is relatively simple, mainly relying on the steel reinforcement cage to distribute the shear force, without fully utilizing the synergistic effect of the steel-concrete interface. This may cause relative slippage between steel and concrete, resulting in local shear failure. In addition, the stability and convenience of the connection during component docking need to be improved, which may affect the overall installation quality and efficiency of the structure.
[0008] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated steel-concrete composite structure, comprising an H-beam web, H-beam flanges welded to the front and rear sides of the H-beam web, the H-beam flanges and the H-beam web forming a receiving groove, sliding grooves on both sides of the inner side of the H-beam flanges, a precast concrete side sealing plate slidably connected inside the sliding groove, the precast concrete side sealing plate being located outside the receiving groove, a precast steel mesh frame being provided inside the receiving groove, the precast steel mesh frame being located inside the precast concrete side sealing plate, the precast steel mesh frame being tied and fixed to the H-beam web and H-beam flanges, a self-compacting concrete pouring layer filling the receiving groove, the self-compacting concrete pouring layer wrapping the outside of the precast steel mesh frame, the self-compacting concrete pouring layer being located inside the precast concrete side sealing plate, and butt-fitting fixing structures welded to both sides of the top and bottom of the inner side of the H-beam flanges.
[0009] Preferably, the precast concrete side sealing plate has an outward convex shape, and the joint between the precast concrete side sealing plate and the H-steel flange is filled with elastic sealant.
[0010] Preferably, shear keyways are provided on both sides of the web of the H-steel, and the depth of the shear keyways is 1 / 2 of the thickness of the web of the H-steel.
[0011] Preferably, the precast concrete side panel is made of C40 concrete with a thickness of 50-60mm.
[0012] Preferably, the docking and fixing structure includes connecting blocks welded to the top and bottom sides of the inner side of the H-steel flange, and the top and bottom of the connecting blocks are provided with screw hole slots.
[0013] Preferably, a groove is provided on the outer side of the screw hole groove, and an anti-slip fastening pad is embedded inside the groove.
[0014] Preferably, the precast steel mesh includes main steel bars disposed inside the receiving groove, and a steel cage is tied to the outside of the main steel bars. Both the steel cage and the main steel bars are located inside the self-compacting concrete pouring layer.
[0015] Compared with the prior art, the beneficial effects of this utility model are:
[0016] 1. This application solves the problems of low prefabrication, low construction efficiency, easy peeling of the interface, and single shear resistance by setting up an H-steel web, H-steel flange, chute, precast concrete side sealing plate, precast steel mesh, and self-compacting concrete pouring layer. The chute on the inner side of the H-steel flange enables the rapid sliding installation of the precast concrete side sealing plate. Combined with the precast steel mesh prefabricated in the factory, it greatly reduces the amount of wet work on site. The self-compacting concrete pouring layer wraps the precast steel mesh and fills the receiving groove formed by the H-steel web and H-steel flange, which enhances the interface bonding between the steel and the concrete and gives full play to the synergistic effect of the two. This solves the problems of low prefabrication degree, low construction efficiency, easy peeling of the interface, and single shear resistance.
[0017] 2. This application sets up a docking and fixing structure, which is used in conjunction with connecting bolts, so that adjacent components can be connected and used, thereby simplifying the connection process, improving the stability and convenience of docking, and ensuring the overall installation quality and assembly efficiency. Attached Figure Description
[0018] Figure 1 This is an overall structural diagram of the prefabricated steel-concrete composite structure of this utility model.
[0019] Figure 2 This is a structural diagram of the H-steel web and H-steel flange of this utility model;
[0020] Figure 3 This is a structural diagram of the precast concrete side sealing plate of this utility model;
[0021] Figure 4 This is a structural diagram of the precast steel mesh frame of this utility model;
[0022] Figure 5 This is a structural diagram of the docking and fixing structure of this utility model.
[0023] In the diagram, 1. H-steel web; 2. H-steel flange; 3. Slide groove; 4. Precast concrete side sealing plate; 5. Precast steel mesh frame; 51. Main reinforcement; 52. Reinforcing cage; 6. Self-compacting concrete pouring layer; 7. Butt joint fixing structure; 71. Connecting block; 72. Screw hole slot; 73. Embedded groove; 74. Anti-slip fastening pad; 8. Elastic sealant; 9. Shear keyway. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-5 The present invention provides the following technical solution:
[0026] A prefabricated steel-concrete composite structure includes an H-beam web 1, with H-beam flanges 2 welded to both the front and rear sides of the H-beam web 1. The H-beam flanges 2 and the H-beam web 1 form a receiving groove. Sliding grooves 3 are provided on both sides of the inner side of the H-beam flanges 2. Precast concrete side sealing plates 4 are slidably connected inside the sliding grooves 3. The precast concrete side sealing plates 4 are located on the outer side of the receiving groove. A precast steel mesh frame 5 is provided inside the receiving groove. The precast steel mesh frame 5 is located on the inner side of the precast concrete side sealing plates 4. The precast steel mesh frame 5 is tied and fixed to the H-beam web 1 and the H-beam flanges 2. The receiving groove is filled with a self-compacting concrete pouring layer 6, which wraps around the outer side of the precast steel mesh frame 5. The self-compacting concrete pouring layer 6 is located on the inner side of the precast concrete side sealing plates 4. Butt fixing structures 7 are welded to both sides of the top and bottom of the inner side of the H-beam flanges 2.
[0027] In this embodiment: by setting up an H-steel web 1, H-steel flange 2, chute 3, precast concrete side sealing plate 4, precast steel mesh 5, self-compacting concrete pouring layer 6, and butt-fitting structure 7, a prefabricated system with coordinated force is formed. The receiving groove formed by welding H-steel web 1 and H-steel flange 2 serves as the basic load-bearing frame. The precast steel mesh 5 is pre-tied and fixed to the steel components to provide internal skeleton support for the concrete. The chute 3 on the inner side of H-steel flange 2 guides the precast concrete side sealing plate 4 to slide quickly into place, forming the outer closed structure of the receiving groove, reducing the on-site formwork installation process. Subsequently, the self-compacting concrete pouring layer is filled. The solid concrete pouring layer 6 wraps around the steel mesh and fills the receiving groove, tightly bonding with the steel components. Through the interface bonding between concrete and steel and the tethering effect of the steel mesh, the steel and concrete work together to improve the overall shear resistance and interface stability. At the same time, the butt fixing structure 7 on the inner side of the H-steel flange 2 can easily realize the precise connection of adjacent components (referring to another set of H-steel components formed by the H-steel web 1 and the H-steel flange 2), ensuring the stability and continuity of the assembly process. Finally, through the orderly cooperation of each structure, the overall mechanical performance and construction efficiency of the structure are guaranteed while reducing on-site wet work.
[0028] Specifically, such as Figure 3As shown, the precast concrete side sealing plate 4 is convex in shape, and the joint between the precast concrete side sealing plate 4 and the H-steel flange 2 is filled with elastic sealant 8.
[0029] Specifically, such as Figure 3 As shown, shear keyways 9 are provided on both sides of the H-steel web 1, and the depth of the shear keyways 9 is 1 / 2 of the thickness of the H-steel web 1.
[0030] Specifically, such as Figure 1 , Figure 5 As shown, the precast concrete side panel 4 is made of C40 concrete with a thickness of 50-60mm.
[0031] In this embodiment: by setting the precast concrete side sealing plate 4 to an outward convex shape, its own deformation resistance is enhanced. At the same time, the elastic sealant 8 filled at the joint with the H-steel flange 2 can buffer the gap deformation caused by temperature changes or stress, ensuring that the precast concrete side sealing plate 4 and the H-steel flange 2 fit tightly. The shear keyways 9 opened on both sides of the H-steel web 1 allow the self-compacting concrete to be embedded in the groove to form a mechanical interlock during pouring. Combined with the depth design of 1 / 2 web thickness, the shear resistance of the steel-concrete interface is significantly improved, and relative slippage is reduced. The precast concrete side sealing plate 4, which is precast with C40 concrete and has a thickness controlled at 50-60mm, reduces its self-weight while ensuring structural strength, and meets the requirements of rapid assembly.
[0032] Specifically, such as Figure 5 As shown, the docking and fixing structure 7 includes connecting blocks 71 welded to the top and bottom sides of the inner side of the H-steel flange 2. The top and bottom of the connecting blocks 71 are provided with screw hole slots 72.
[0033] Specifically, such as Figure 5 As shown, a groove 73 is provided on the outer side of the screw hole groove 72, and an anti-slip fastening pad 74 is embedded inside the groove 73.
[0034] In this embodiment: By setting up a docking and fixing structure 7 consisting of a connecting block 71, a screw hole groove 72, and an anti-slip fastening pad 74, the connecting block 71 is welded to the H-steel flange 2 to form a stable foundation. The screw hole groove 72 allows the connecting bolt to pass through to achieve docking and fixing with another set of H-steel components. The anti-slip fastening pad 74 in the groove 73 increases the friction between the bolt and the hole groove, avoiding loosening caused by long-term stress. The combination of the three simplifies the docking process and improves the overall stability of the connection.
[0035] Specifically, such as Figure 4 As shown, the precast steel mesh frame 5 includes main steel bars 51 set inside the receiving groove, and a steel cage 52 is tied to the outside of the main steel bars 51. Both the steel cage 52 and the main steel bars 51 are located inside the self-compacting concrete pouring layer 6.
[0036] In this embodiment: the precast steel mesh frame 5, composed of main steel bars 51 and steel cage 52, provides longitudinal force support, and the outer steel cage 52 forms a three-dimensional mesh structure. The two work together to enhance the overall rigidity. At the same time, both the steel cage 52 and the main steel bars 51 are wrapped by a self-compacting concrete pouring layer 6, so that the steel bars, concrete and steel components form a unified force system, further dispersing the load and improving the crack resistance and load-bearing capacity of the structure.
[0037] Working principle: In the use of prefabricated steel-concrete composite structures, firstly, the receiving groove formed by welding the H-steel web 1 and H-steel flange 2 serves as the core load-bearing frame. The precast steel mesh 5 is first tied and fixed to the H-steel web 1 and H-steel flange 2, providing internal skeletal support for the main load. Then, through the sliding groove 3 on the inner side of the H-steel flange 2, the precast C40 concrete side sealing plate 4 is slidably installed into place. The convex shape of the precast concrete side sealing plate 4 enhances its own deformation resistance, and the elastic sealant 8 at its joint with the H-steel flange 2 can buffer gap deformation and ensure a tight fit. Next, a self-compacting concrete pouring layer 6 is filled into the receiving groove. The cast-in-place layer 6 encloses the precast steel mesh frame 5, with the main steel bars 51 providing longitudinal support. The outer steel cage 52 forms a three-dimensional mesh and is embedded in the shear keyways 9 on both sides of the H-steel web 1, forming mechanical interlocking and interface bonding. This enables the steel and concrete to share the load, improving the overall shear resistance and stability. When it is necessary to connect another set of adjacent H-steel components, the connecting bolts are inserted into the bolt hole slots 72 of the connecting block 71 through the butt fixing structure 7 on the inner side of the H-steel flange 2. The anti-slip fastening pads 74 in the groove 73 increase friction to prevent loosening, achieving a quick and stable connection. The coordinated operation of each structure reduces on-site wet work while ensuring the efficiency of structural assembly and overall mechanical performance.
[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A prefabricated steel-concrete composite structure, comprising an H-beam web (1), characterized in that: H-steel flanges (2) are welded to both the front and rear sides of the H-steel web (1). The H-steel flanges (2) and the H-steel web (1) form a receiving groove. Sliding grooves (3) are provided on both sides of the inner side of the H-steel flanges (2). A precast concrete side sealing plate (4) is slidably connected inside the sliding groove (3). The precast concrete side sealing plate (4) is located on the outer side of the receiving groove. A precast steel mesh frame (5) is provided inside the receiving groove. The precast steel mesh frame (5) is located on the outer side of the precast concrete web. Inside the concrete side sealing plate (4), the precast steel mesh frame (5) is tied and fixed to the H steel web plate (1) and H steel flange (2). The interior of the receiving groove is filled with a self-compacting concrete pouring layer (6). The self-compacting concrete pouring layer (6) wraps around the outside of the precast steel mesh frame (5). The self-compacting concrete pouring layer (6) is located inside the precast concrete side sealing plate (4). The top and bottom sides of the inner side of the H steel flange (2) are welded with butt fixing structures (7).
2. The prefabricated steel-concrete composite structure according to claim 1, characterized in that: The precast concrete side sealing plate (4) is convex in shape, and the joint between the precast concrete side sealing plate (4) and the H-steel flange (2) is filled with elastic sealant (8).
3. The prefabricated steel-concrete composite structure according to claim 1, characterized in that: Shear keyways (9) are provided on both sides of the H-steel web (1), and the depth of the shear keyways (9) is 1 / 2 of the thickness of the H-steel web (1).
4. The prefabricated steel-concrete composite structure according to claim 1, characterized in that: The precast concrete side panel (4) is made of C40 concrete with a thickness of 50-60mm.
5. A prefabricated steel-concrete composite structure according to claim 1, characterized in that: The docking fixing structure (7) includes connecting blocks (71) welded to the top and bottom sides of the inner side of the H steel flange (2), and screw hole grooves (72) are provided on the top and bottom of the connecting blocks (71).
6. A prefabricated steel-concrete composite structure according to claim 5, characterized in that: A groove (73) is provided on the outside of the screw hole groove (72), and an anti-slip fastening pad (74) is embedded inside the groove (73).
7. A prefabricated steel-concrete composite structure according to claim 1, characterized in that: The precast steel mesh (5) includes main steel bars (51) set inside the receiving groove. A steel cage (52) is tied to the outside of the main steel bars (51). The steel cage (52) and the main steel bars (51) are both located inside the self-compacting concrete pouring layer (6).