Steel-concrete combined member with buckling-resistant flanges

Abstract

The steel-concrete combined component comprises an H-shaped steel rib, a C-shaped steel bar, a connecting steel bar and concrete, the H-shaped steel rib is formed by welding a web, an upper flange and a lower flange, the upper flange and the lower flange are both pi-shaped steel, and the pi-shaped steel is of a hot-rolling integrally-formed structure or a steel plate installing and welding structure or a T-shaped steel splicing structure. And a rib penetrating hole is formed in a short web plate of the pi-shaped steel. The structure is optimized through the pi-shaped steel flanges, so that the buckling resistance is improved, the steel consumption is reduced, meanwhile, the pressing assembly, the fixing assembly and the detachable driving assembly are additionally arranged, automatic tight connection and fixation of the connecting steel bars and the C-shaped steel bars are achieved, manual bundling is not needed, the installation efficiency and the connection stability are improved, and the construction cost is reduced. And the component can be prefabricated in a factory, meets the industrial requirements of buildings, considers the universality of beam columns, and solves the problems that a traditional steel-concrete combined component is tedious in site construction, and the buckling resistance and the installation efficiency are difficult to consider at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building components, in particular to a steel-concrete composite component with anti-buckling flanges. BACKGROUND

[0002] Steel structural components have been widely used in the field of building engineering due to their high strength, light weight, short construction period and other advantages. However, due to the cross-sectional characteristics, in addition to meeting the strength requirements, the buckling instability problem is particularly prominent during the service process of the steel structural components. The components may be buckling failure under stress far lower than the yield strength of steel, resulting in a significant decrease in carrying capacity, which seriously affects the safety and reliability of the structure.

[0003] To solve the buckling problem of steel structures, traditional steel-concrete composite components emerge as the times require. The core idea is to wrap concrete outside the H-shaped steel to suppress buckling by using the restraining effect of concrete on steel, thereby improving the overall carrying capacity of the component. However, the traditional steel-concrete composite component has obvious limitations. Although H-shaped steel can be prefabricated in the factory, a large amount of steel bar binding and concrete pouring operations are still required on site. Not only is the construction process complicated and labor-intensive, but it is also greatly affected by the construction environment and weather conditions, resulting in low construction efficiency, which is difficult to adapt to the development needs of today's building industrialization and modularization, and cannot meet the requirements of efficient construction, energy saving and emission reduction and quality control of engineering construction.

[0004] Therefore, it is necessary to design a steel-concrete composite component with anti-buckling flanges to solve the above problems. SUMMARY

[0005] The purpose of the present application is to solve the problems existing in the prior art, and a steel-concrete composite component with anti-buckling flanges is proposed. The π-shaped steel flange is optimized to improve the anti-buckling performance and reduce the amount of steel, and the compression assembly, the fixing assembly and the detachable driving assembly are additionally provided to realize automatic and close connection and fixation of the connecting steel bar and the C-shaped steel bar without manual binding, improve the installation efficiency and connection stability, and realize factory prefabrication of the component to adapt to the needs of building industrialization, and consider the generality of beams and columns. The problems of complicated on-site construction, difficult to balance the anti-buckling performance and installation efficiency of traditional steel-concrete composite components are solved.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: A steel-concrete composite member with buckling-resistant flanges includes H-shaped steel beams, C-shaped reinforcing bars, connecting reinforcing bars, and concrete. The H-shaped steel beams are welded together from a web and upper and lower flanges. Both upper and lower flanges are π-shaped steel beams, which can be hot-rolled integral structures, welded steel plate structures, or T-shaped steel splicing structures. Through holes are provided on the short web of the π-shaped steel beams. The C-shaped reinforcing bars pass through the through holes to connect and fix the upper and lower flanges. The connecting reinforcing bars are connected to multiple C-shaped reinforcing bars by steel wires. The two sides of the H-shaped steel beams are filled with concrete. The concrete, the H-shaped steel beams, the C-shaped reinforcing bars, and the connecting reinforcing bars together form an integral load-bearing structure.

[0007] Preferably, clamping assemblies are fixedly connected to both sides of the web. The clamping assemblies are used to bring the C-shaped steel bars into close contact with the connecting steel bars. The clamping assemblies include first slide rails welded to the web. Self-locking sliders are slidably connected to multiple first slide rails. A strip block is fixedly connected to the adjacent sides of every two cooperating self-locking sliders. Multiple L-shaped blocks are fixedly connected to the side of each strip block away from the web. Each L-shaped block is provided with an arc groove.

[0008] Preferably, fixing components are provided on both the left and right sides of the web. The fixing components are used to install the connecting steel bars at designated positions. The fixing components include two second slide rails fixedly connected to the web. A connecting plate is slidably connected to the two second slide rails. A lifting block is fixedly connected to the side of the connecting plate away from the web. A U-shaped frame is fixedly connected to the web. Multiple upper arc-shaped blocks are provided on the side of the lifting block away from the web. Multiple lower arc-shaped blocks are provided on the side of the U-shaped frame away from the web. A threaded block is fixedly connected to the lifting block. A short rod is threaded through the threaded block.

[0009] Preferably, the U-shaped frame and the lifting block are provided with guide openings, and each of the upper arc-shaped block and the lower arc-shaped block is fixedly connected to a guide rod on the side near the web plate. Each guide rod passes through the corresponding guide opening, and each guide rod is fixedly connected to a disc. Each disc is elastically connected to the adjacent side of the corresponding U-shaped frame or lifting block through a first spring.

[0010] Preferably, the system further includes a drive assembly, which includes a third slide rail. A fixed frame is slidably connected to the third slide rail, and two first racks are mounted on the fixed frame. A fixed plate is fixedly connected to the lower end of the third slide rail. Two first rotating rods and a second rotating rod are rotatably connected to the fixed plate. The two first rotating rods and the second rotating rod are connected by a transmission assembly. A first gear is fixedly connected to each of the two first rotating rods. The first rack meshes with the corresponding first gear. A second gear is fixedly connected to the second rotating rod. The fixed plate is L-shaped, and a cylinder is mounted on the fixed plate. A second rack that meshes with the second gear is fixedly connected to the telescopic end of the cylinder.

[0011] Preferably, the web plate is provided with a second insertion groove, the third slide rail is fixedly connected with a first insertion block that mates with the second insertion groove, the two first racks are fixedly connected with vertical plates, the upper ends of the two vertical plates are jointly fixedly connected with the second insertion block, and the lower end of the strip block located above is provided with a first insertion groove that mates with the second insertion block.

[0012] Preferably, the second rotating rod and the short rod are connected by a connecting assembly, the connecting assembly including a connecting groove at the lower end of the second rotating rod, a rectangular groove at the upper end of the short rod, a rectangular block slidably connected in the rectangular groove, the rectangular block and the adjacent side of the rectangular groove being elastically connected by a second spring, and the edges of the rectangular block being rounded.

[0013] The present invention has the following beneficial effects: 1. Compared with existing technologies, using π-shaped steel as the upper and lower flanges and combining it with a short web design effectively reduces the flange width-to-thickness ratio, significantly improves the buckling resistance of the component, and at the same time reduces the flange thickness and steel consumption, achieving a balance between structural economy and lightweighting. 2. Compared with existing technologies, the detachable drive component links the clamping component and the fixing component to automatically complete the positioning and fixing of the connecting steel bars and the tight connection between the C-shaped steel bars and the connecting steel bars. No manual binding is required, which greatly reduces manual operation, improves installation efficiency and connection stability, and reduces construction errors. 3. Compared with existing technologies, the core structure of the components can be completely prefabricated in the factory, requiring only a small amount of on-site construction work at the nodes. This adapts to the needs of industrialized and modular building development, while also taking into account the versatility of beam and column components. It has a wide range of applications and is not overly restricted by on-site environment and weather conditions. 4. Compared with existing technologies, the synergistic effect of concrete filling, C-shaped steel bars, and connecting steel bars can not only limit the inward buckling deformation of the flange, but also suppress the outward buckling of the flange through steel bar connection, further enhancing the overall load-bearing capacity and ductility of the component, and improving the safety and reliability of the structure in service.

[0014] In summary, this invention, while optimizing buckling resistance and reducing costs, automates and streamlines the installation process, balancing economy, efficiency, and structural stability. It effectively addresses the pain points of traditional steel-concrete composite components, such as cumbersome on-site construction, insufficient buckling resistance, and low installation efficiency, demonstrating significant practical value and promising prospects for wider application. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a steel-concrete composite member with buckling-resistant flanges after concrete pouring, as proposed in this invention. Figure 2 This is a structural schematic diagram of a steel-concrete composite member with buckling-resistant flanges proposed in this invention; Figure 3 for Figure 2 A structural diagram from another perspective; Figure 4 This is a schematic diagram of the L-shaped block. Figure 5 A cross-sectional view of the short rod; Figure 6 This is a schematic diagram of the drive component. Figure 7 for Figure 6 A structural diagram from another perspective.

[0016] In the diagram: 1. H-shaped steel frame, 2. Web plate, 3. C-shaped steel bar, 4. Connecting steel bar, 5. First insertion block, 6. First slide rail, 7. L-shaped block, 8. Strip block, 9. Self-locking slider, 10. Connecting rod, 11. Lower arc block, 12. Upper arc block, 13. Arc groove, 14. Guide rod, 15. First spring, 16. Lifting block, 17. U-shaped frame, 18. Second slide rail, 19. First insertion groove, 20. Short rod, 21. Rectangular groove, 22. Second spring, 23. Rectangular block, 24. Second insertion groove, 25. Third slide rail, 26. Fixing frame, 27. First rack, 28. Fixing plate, 29. First rotating rod, 30. First gear, 31. Transmission assembly, 32. Second rotating rod, 33. Second gear, 34. Second rack, 35. Cylinder, 36. Second insertion block, 37. Vertical plate, 38. Connecting groove. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0018] Reference Figures 1-7A steel-concrete composite member with buckling-resistant flanges includes an H-shaped steel frame 1, C-shaped steel bars 3, connecting steel bars 4, and concrete. The H-shaped steel frame 1 is composed of a web 2 and upper and lower flanges welded together. Both upper and lower flanges are π-shaped steels, which are hot-rolled integral structures, welded steel plate structures, or T-shaped steel splicing structures. Through holes are opened on the short web of the π-shaped steels. The C-shaped steel bars 3 pass through the through holes to connect and fix the upper and lower flanges. The connecting steel bars 4 are connected to multiple C-shaped steel bars 3 by steel wires. The connecting steel bars 4 are set along the length of the member and arranged perpendicular to the C-shaped steel bars 3. The two sides of the H-shaped steel frame are filled with concrete. The concrete is fine stone concrete with a strength grade of not less than C30. The concrete, the H-shaped steel frame 1, the C-shaped steel bars 3, and the connecting steel bars 4 together form an integral load-bearing structure. The three components work together to bear the load and suppress flange buckling.

[0019] The web 2 has clamping components fixedly connected to both sides. The clamping components are symmetrically distributed on both sides of the central axis of the web 2 and are used to bring the C-shaped steel bars 3 into close contact with the connecting steel bars 4. The clamping components include a first slide rail 6 welded to the web 2. The first slide rail 6 is vertically set along the height direction of the web 2. Multiple self-locking sliders 9 are slidably connected to the first slide rail 6. Anti-slip texture is provided between the self-locking sliders 9 and the first slide rail 6 to ensure that they can lock themselves in position after sliding. A strip block 8 is fixedly connected to the adjacent sides of every two cooperating self-locking sliders 9. Multiple L-shaped blocks 7 are fixedly connected to the side of each strip block 8 away from the web 2. The number of L-shaped blocks 7 corresponds one-to-one with the number of C-shaped steel bars 3. Each L-shaped block 7 is provided with an arc groove 13. The arc of the arc groove 13 is consistent with the outer arc of the C-shaped steel bar 3, so that it can closely fit the surface of the C-shaped steel bar 3.

[0020] The web 2 has fixing components on both its left and right sides. These components are used to install the connecting steel bars 4 at designated positions. Each fixing component includes two second slide rails 18 fixedly connected to the web 2. A connecting plate is slidably connected to both second slide rails 18. A lifting block 16 is fixedly connected to the side of the connecting plate away from the web 2. A U-shaped frame 17 is fixedly connected to the web 2. The lifting block 16 has multiple upper arc-shaped blocks 12 on the side away from the web 2, and the U-shaped frame 17 has multiple lower arc-shaped blocks 11 on the side away from the web 2. The upper arc-shaped blocks 12 and lower arc-shaped blocks 11 are arranged vertically and vertically, and their number matches the number of connecting steel bars 4. A threaded block is fixedly connected to the lifting block 16, and a short rod 20 is threaded through the threaded block. Both the U-shaped frame 17 and the lifting block 16 are provided with guide openings, which are elongated holes extending horizontally. Each upper arc-shaped block 12 and lower arc-shaped block 11 is fixedly connected to a guide rod 14 on the side near the web plate 2. The guide rod 14 slides with the guide opening. Each guide rod 14 passes through the corresponding guide opening. Each guide rod 14 is fixedly connected to a disc. Each disc is elastically connected to the adjacent side of the corresponding U-shaped frame 17 or lifting block 16 through a first spring 15 to ensure that the C-shaped steel bar 3 and the connecting steel bar 4 are in tight contact.

[0021] The system also includes a drive assembly, which comprises a third slide rail 25. A fixed frame 26 is slidably connected to the third slide rail 25, and two first racks 27 are mounted on the fixed frame 26. A fixed plate 28 is fixedly connected to the lower end of the third slide rail 25, and two first rotating rods 29 and a second rotating rod 32 are rotatably connected to the fixed plate 28. The two first rotating rods 29 and the second rotating rod 32 are connected by a transmission assembly 31, which is a chain and sprocket drive structure. It includes sprockets fixedly fixed to the first rotating rods 29 and the second rotating rod 32, and a chain surrounding the outside of the sprockets to ensure synchronous power transmission. A first gear 30 is fixedly connected to each of the two first rotating rods 29. The first gear 30 meshes with the second gear 27. The second gear 33 is fixedly connected to the second rotating rod 32. The fixing plate 28 is L-shaped and a cylinder 35 is installed on the fixing plate 28. The telescopic end of the cylinder 35 is fixedly connected to the second rack 34 that meshes with the second gear 33. The web plate 2 is provided with a second insertion groove 24, which is a T-shaped groove structure. The first insertion block 5 that cooperates with the second insertion groove 24 is fixedly connected to the third slide rail 25. Vertical plates 37 are fixedly connected to both first racks 27. The upper ends of the two vertical plates 37 are fixedly connected to the second insertion block 36. The lower end of the strip block 8 located above is provided with a first insertion groove 19 that cooperates with the second insertion block 36.

[0022] The second rotating rod 32 and the short rod 20 are connected by a connecting assembly. The connecting assembly includes a connecting groove 38 at the lower end of the second rotating rod 32 and a rectangular groove 21 at the upper end of the short rod 20. A rectangular block 23 is slidably connected in the rectangular groove 21. The adjacent sides of the rectangular block 23 and the rectangular groove 21 are elastically connected by a second spring 22. The edges of the rectangular block 23 are rounded to facilitate the smooth insertion of the rectangular block 23 into the connecting groove 38.

[0023] The functional principle of this invention can be explained by the following operation: In the component prefabrication stage, the web plate 2 is first welded to the upper and lower π-shaped steel flanges to form an H-shaped steel frame 1, and the short web plate of the π-shaped steel is reserved with through holes; then the detachable drive assembly is installed by cooperating with the second insertion slot 24 of the web plate 2 through the first insertion block 5, so that the second insertion block 36 of the drive assembly is connected with the first insertion slot 19 of the upper strip block 8, and the linkage assembly of the drive assembly, the clamping assembly, and the fixing assembly is completed.

[0024] During the connection and fixing of the reinforcing bars, the connecting reinforcing bars 4 are placed on multiple lower arc-shaped blocks 11, and the C-shaped reinforcing bars 3 are passed through the corresponding through holes. The cylinder 35 of the drive assembly is activated. The telescopic end of the cylinder 35 drives the second rack 34 to move. The second rotating rod 32 is driven to rotate through the second gear 33. Then, the two first rotating rods 29 are driven to rotate synchronously through the transmission assembly 31. The first gear 30 on the first rotating rod 29 meshes with the first rack 27, pushing the fixing frame 26 and the vertical plate 37 to drive the self-locking slider 9 of the pressing assembly to slide along the first slide rail 6, so that the arc groove 13 of the L-shaped block 7 on the strip block 8 fits against the C-shaped reinforcing bar 3 and drives the C-shaped reinforcing bar 3 to move towards the web plate 2. Simultaneously, the second rotating rod 32 drives the short rod 20 to rotate through the connecting assembly. The connecting groove at the lower end of the second rotating rod 32 in the connecting assembly aligns with the rectangular block 23 in the rectangular groove 21 at the upper end of the short rod 20. The rectangular block 23 is elastically supported by the second spring 22 and has rounded edges to ensure smooth alignment and transmission of rotational torque. This causes the short rod 20 to drive the threaded block and the lifting block 16 to move along the second slide rail 18. The lower arc-shaped block 11 on the U-shaped frame 17 and the upper arc-shaped block 12 on the lifting block 16 clamp and fix the connecting steel bar 4. The guide rod 14 and the first spring 15 provide elastic buffering and adaptive adjustment capabilities. At the same time, the arc groove 13 of the L-shaped block 7 forms a reverse clamping force on the C-shaped steel bar 3, ensuring that the C-shaped steel bar 3 and the connecting steel bar 4 always remain in close contact, ensuring the reliability of the connection between the two. A reliable connection can be achieved without manual binding.

[0025] After the steel bars are connected and fixed, the self-locking slider 9 locks itself in position through the anti-slip texture, and the drive component is removed for reuse. Finally, concrete is filled into both sides of the H-shaped steel frame 1. The concrete, H-shaped steel frame 1, C-shaped steel bars 3, and connecting steel bars 4 form an integral load-bearing structure. The concrete can limit the inward buckling of the flange, and the tension between the C-shaped steel bars 3 and the connecting steel bars 4 can inhibit the outward buckling of the flange, thus synergistically improving the buckling resistance and overall load-bearing capacity of the component.

[0026] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A steel-concrete composite member with buckling-resistant flanges, characterized in that, include: The structure consists of an H-shaped steel frame (1), C-shaped steel bars (3), connecting steel bars (4), and concrete. The H-shaped steel frame (1) is composed of a web (2) and two upper and lower flanges welded together. Both upper and lower flanges are π-shaped steels. The π-shaped steels are hot-rolled integral forming structures, steel plate welded structures, or T-shaped steel splicing structures. The short web of the π-shaped steels has through holes for reinforcing bars. The C-shaped steel bars (3) pass through the through holes to connect and fix the upper and lower flanges. The connecting steel bars (4) are connected to multiple C-shaped steel bars (3) by steel wires. The two sides of the H-shaped steel frame are filled with concrete. The concrete, together with the H-shaped steel frame (1), C-shaped steel bars (3), and connecting steel bars (4), constitutes an integral load-bearing structure.

2. A steel-concrete composite member with buckling-resistant flanges according to claim 1, characterized in that: A clamping assembly is fixedly connected to both the left and right sides of the web (2). The clamping assembly is used to bring the C-shaped steel bar (3) into close contact with the connecting steel bar (4). The clamping assembly includes a first slide rail (6) welded to the web (2). A self-locking slider (9) is slidably connected to a plurality of the first slide rails (6). A strip block (8) is fixedly connected to the adjacent sides of every two cooperating self-locking sliders (9). A plurality of L-shaped blocks (7) are fixedly connected to the side of each strip block (8) away from the web (2). Each L-shaped block (7) is provided with an arc groove (13).

3. A steel-concrete composite member with buckling-resistant flanges according to claim 2, characterized in that: The web (2) is provided with fixing components on both the left and right sides. The fixing components are used to install the connecting steel bars (4) at designated positions. The fixing components include two second slide rails (18) fixedly connected to the web (2). A connecting plate is slidably connected to the two second slide rails (18). A lifting block (16) is fixedly connected to the side of the connecting plate away from the web (2). A U-shaped frame (17) is fixedly connected to the web (2). Multiple upper arc blocks (12) are provided on the side of the lifting block (16) away from the web (2). Multiple lower arc blocks (11) are provided on the side of the U-shaped frame (17) away from the web (2). A threaded block is fixedly connected to the lifting block (16). A short rod (20) is threadedly connected through the threaded block.

4. A steel-concrete composite member with buckling-resistant flanges according to claim 3, characterized in that: The U-shaped frame (17) and the lifting block (16) are provided with guide openings. Each upper arc block (12) and lower arc block (11) is fixedly connected to a guide rod (14) on the side near the web plate (2). Each guide rod (14) passes through the corresponding guide opening. Each guide rod (14) is fixedly connected to a disc. Each disc is elastically connected to the adjacent side of the corresponding U-shaped frame (17) or lifting block (16) through a first spring (15).

5. A steel-concrete composite member with buckling-resistant flanges according to claim 1, characterized in that: It also includes a drive assembly, which includes a third slide rail (25), a fixed frame (26) slidably connected to the third slide rail (25), two first racks (27) mounted on the fixed frame (26), a fixed plate (28) fixedly connected to the lower end of the third slide rail (25), two first rotating rods (29) and a second rotating rod (32) rotatably connected to the fixed plate (28), the two first rotating rods (29) and the second rotating rod (32) being connected by a transmission assembly (31), a first gear (30) fixedly connected to each of the two first rotating rods (29), the first rack (27) meshing with the corresponding first gear (30), a second gear (33) fixedly connected to the second rotating rod (32), the fixed plate (28) being L-shaped, a cylinder (35) mounted on the fixed plate (28), and a second rack (34) meshing with the second gear (33) fixedly connected to the telescopic end of the cylinder (35).

6. A steel-concrete composite member with buckling-resistant flanges according to claim 5, characterized in that: The web plate (2) is provided with a second insertion groove (24), and the third slide rail (25) is fixedly connected with a first insertion block (5) that cooperates with the second insertion groove (24). The two first racks (27) are fixedly connected with vertical plates (37), and the upper ends of the two vertical plates (37) are fixedly connected with a second insertion block (36). The lower end of the strip block (8) located above is provided with a first insertion groove (19) that cooperates with the second insertion block (36).

7. A steel-concrete composite member with buckling-resistant flanges according to claim 5, characterized in that: The second rotating rod (32) is connected to the short rod (20) by a connecting assembly. The connecting assembly includes a connecting groove (38) at the lower end of the second rotating rod (32). The upper end of the short rod (20) is provided with a rectangular groove (21). A rectangular block (23) is slidably connected in the rectangular groove (21). The adjacent sides of the rectangular block (23) and the rectangular groove (21) are elastically connected by a second spring (22). The edges of the rectangular block (23) are rounded.

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