Concrete filled steel tube combination column, latticed column and reinforcing device

Abstract

The utility model discloses a steel pipe concrete combination column, a latticed column and a reinforcing device. The concrete filled steel tube combination column comprises at least three steel tubes, a first plate, a second plate and a third plate, the at least three steel tubes are arranged in parallel, and the at least three steel tubes are arranged at intervals along an annular track on a plane perpendicular to the axis direction of the steel tubes; a first plate is arranged between every two adjacent steel pipes along the annular track. The multiple second plates are sequentially connected to form an annular pipe column, the annular pipe column and the containing cavity are coaxially arranged, and the annular pipe column is arranged in the containing cavity; one side of each third plate is connected with the second plate, the other side of each third plate is connected with the first plate or the steel pipe, and the multiple third plates are arranged in the second cavity to divide the second cavity into multiple sub-cavities; and a concrete layer is poured in the inner cavity and / or the sub-cavity of the steel pipe. According to the embodiment, the buckling instability resistance and the overall bearing performance can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of structural engineering technology, specifically relating to a steel-concrete composite column, a lattice column, and a reinforcement device. Background Technology

[0002] Concrete-tube steel structures, as a high-performance structural form, have been successfully applied in various engineering fields such as housing construction and bridges. However, with the development of modern building structures towards super high-rise, large-scale, complex, and high-load-bearing capacity, as well as increasingly severe working and service environments, there is an urgent need to develop high-performance concrete-tube steel structures to meet the high-performance service requirements of engineering structures throughout their entire life cycle. Utility Model Content

[0003] This utility model is based on the inventor's discovery and understanding of the following facts and problems:

[0004] The inventors recognized that hollow-core steel-concrete composite columns, as an important vertical load-bearing component in steel-concrete composite structures, have been widely used in building structures. However, related hollow-core steel-concrete composite columns (such as square-within-a-circle hollow-core steel-concrete composite columns) are prone to problems such as localized buckling of the plates and tearing at the corners of the steel tubes. This phenomenon increases the risk of column failure, especially under high axial compression ratios and heavy loads.

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of this utility model propose a steel-concrete composite column that can improve buckling instability resistance and overall load-bearing capacity.

[0007] An embodiment of this utility model proposes a lattice column.

[0008] An embodiment of this utility model proposes a reinforcement device.

[0009] The steel-concrete composite column of this utility model embodiment includes:

[0010] At least three steel pipes are arranged in parallel and spaced apart along a circular trajectory on a plane perpendicular to the axial direction of the steel pipes.

[0011] A first plate is disposed between two of the steel pipes along the annular trajectory, with the first plate disposed between two adjacent steel pipes to define a cavity between the at least three steel pipes and the plurality of first plates;

[0012] The second plate, and a plurality of the second plates are connected in sequence to form an annular column. The annular column is arranged coaxially with the cavity. The annular column is disposed in the cavity to divide the cavity into a first chamber corresponding to the inner wall surface of the annular column and a second chamber corresponding to the outer wall surface of the annular column.

[0013] The third plate has one side connected to the second plate and the other side connected to the first plate or the steel pipe. Multiple third plates are disposed in the second chamber to divide the second chamber into multiple sub-chambers.

[0014] The inner cavity of the steel pipe and / or the sub-cavity are filled with a layer of concrete.

[0015] The steel-concrete composite column of this embodiment fully utilizes the lightweight, high-strength, and high-load-bearing characteristics of the hollow-core steel-concrete composite column, improving the buckling resistance of the outer steel tube and plate, as well as the restraint effect between steel and concrete. This embodiment of the steel-concrete composite column exhibits high load-bearing capacity, strong fire resistance, excellent synergistic performance, and is lightweight and high-strength, making it suitable for use as a vertical load-bearing component in new structures and for the reinforcement and renovation of existing load-bearing components.

[0016] In some embodiments, the first plate is a wave plate.

[0017] In some embodiments, the first plate includes a first segment located at a crest position, a second segment located at a trough position, and a third segment connecting the first segment and the second segment, wherein the third segment forms an angle of 45 degrees with the first segment and the second segment;

[0018] And / or, the wave height of the first plate is 50 mm to 100 mm.

[0019] In some embodiments, the number of steel pipes is at least four;

[0020] And / or, the annular trajectory is a circle, a rectangle or a regular polygon, and the steel pipe is located at each corner of the annular trajectory;

[0021] And / or, the length directions of the first plate, the second plate, and the third plate are all parallel to the axial direction of the steel pipe.

[0022] In some embodiments, the system further includes a reinforcing cage disposed within the inner cavity of the steel pipe, the reinforcing cage being fixed within the inner cavity of the steel pipe by concrete pouring.

[0023] In some embodiments, the diameter of the main reinforcing bars in the steel cage is 15mm to 20mm, and the steel grade of the main reinforcing bars is not lower than HRB500.

[0024] In some embodiments, the strength grade of the steel pipe and the first plate is not lower than Q460, and the strength grade of the concrete layer is not lower than C40;

[0025] And / or, the thickness of the third plate is 20 mm to 30 mm;

[0026] And / or, the first plate or the second plate is provided with grouting holes, the diameter of which is not less than 150mm.

[0027] In some embodiments, at least some of the steel pipe, the first plate, the second plate, and the third plate are fixed together to form a prefabricated component.

[0028] The lattice column of this utility model embodiment includes:

[0029] A steel-concrete composite column, wherein the steel-concrete composite column is as described in any of the above embodiments, and the number of the steel-concrete composite columns is at least two.

[0030] A connecting column, which connects two adjacent steel-concrete composite columns.

[0031] The reinforcement device of this utility model embodiment is used for reinforcing existing load-bearing components, and the reinforcement device includes:

[0032] A steel-concrete composite column, wherein the steel-concrete composite column is as described in any of the above embodiments, wherein an existing load-bearing member is located in the middle of the first chamber of the steel-concrete composite column, and a concrete layer is poured between the existing load-bearing member and the inner wall of the annular column. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a steel-concrete composite column according to an embodiment of the present invention.

[0034] Figure 2 This is a three-dimensional schematic diagram of a steel-concrete composite column according to an embodiment of this utility model.

[0035] Figure 3 This is a schematic diagram of the first plate in an embodiment of this utility model.

[0036] Figure 4 This is a schematic diagram of the annular tubular column in an embodiment of this utility model.

[0037] Figure 5 This is a schematic diagram of the third plate in an embodiment of this utility model.

[0038] Figure 6 This is a schematic diagram of the steel cage in an embodiment of this utility model.

[0039] Figure 7 This is a schematic diagram of the construction of a steel-concrete composite column according to an embodiment of this utility model.

[0040] Figure 8 This is a construction schematic diagram of a steel-concrete composite column according to another embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram of a lattice column according to an embodiment of the present invention.

[0042] Figure 10 This is a three-dimensional schematic diagram of a lattice column according to an embodiment of the present utility model.

[0043] Figure 11 This is a schematic diagram of a lattice column according to another embodiment of the present invention.

[0044] Figure 12 This is a schematic diagram of the reinforcement device according to an embodiment of the present invention.

[0045] Figure 13 This is a three-dimensional schematic diagram of the reinforcement device according to an embodiment of the present utility model.

[0046] Figure 14 This is a schematic diagram of the construction of the reinforcement device according to an embodiment of the present utility model.

[0047] Figure 15 This is a schematic diagram of the construction of a reinforcement device according to another embodiment of the present invention.

[0048] Figure label:

[0049] 100. Steel-concrete composite column;

[0050] 1. Steel pipe;

[0051] 2. First board; 21. First section; 22. Second section; 23. Third section;

[0052] 3. Second board; 31. Second board A; 32. Second board B;

[0053] 4. The third board;

[0054] 51. First chamber; 52. Second chamber; 521. Sub-chamber;

[0055] 6. Reinforcing cage;

[0056] 7. Concrete layer;

[0057] 8. Connecting column;

[0058] 9. Existing load-bearing components. Detailed Implementation

[0059] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0060] The following describes an embodiment of the present invention: a steel-concrete composite column 100, a lattice column, and a reinforcement device.

[0061] like Figures 1 to 8 As shown, the steel-concrete composite column 100 of this utility model embodiment includes at least three steel pipes 8, a first plate 2, a second plate 3 and a third plate 4.

[0062] At least three steel pipes 8 are arranged in parallel. For example, the number of steel pipes 8 can be 3, 4, or 6. In practical applications, the selection can be made according to the size, shape, and load-bearing capacity of the composite column to be constructed. The at least three steel pipes 8 are arranged at intervals along a circular trajectory on a plane perpendicular to the axis of the steel pipes 8. The circular trajectory can be a circle, a rectangle, or a roughly regular polygon. When the circular trajectory is a circle, the at least three steel pipes 8 are arranged at equal intervals in the circumferential direction. When the circular trajectory is a rectangle or a roughly regular polygon, each steel pipe 8 is located at one corner of the regular polygon. The accompanying drawings in this embodiment show a case including four steel pipes 8, with the circular trajectory being a roughly square shape.

[0063] The first plate 2 is disposed between two steel pipes 8. Specifically, along the annular trajectory, the first plate 2 is disposed between two adjacent steel pipes 8 to define a cavity between at least three steel pipes 8 and multiple first plates 2. The cross-section of the cavity is approximately the same as the shape of the annular trajectory. For example, in the attached figures of this embodiment, the annular trajectory is approximately square, the liquid level in the cavity is approximately square, and the corners of the cavity are arc-shaped due to the presence of the steel pipes 8. This reduces stress concentration at the corners, improves tear resistance, and enhances stability and load-bearing capacity.

[0064] Multiple second plates 3 are sequentially connected to form an annular column, which is coaxially arranged with the cavity. It should be understood that the multiple second plates 3 are sequentially arranged and welded together along a trajectory that is approximately concentric with the annular trajectory, so that the cross-section of the annular column is circular or polygonal. For example, an annular column formed by welding multiple arc-shaped second plates 3 is circular, or an annular column formed by welding multiple flat second plates 3 is octagonal.

[0065] An annular tubular column is disposed within a cavity to divide the cavity into a first chamber 51 corresponding to the inner wall surface of the annular tubular column and a second chamber 52 corresponding to the outer wall surface of the annular tubular column. The first chamber 51 is the inner cavity of the annular tubular column, and the second chamber 52 is the chamber between the outer wall of the annular tubular column and the first plate 2 and the steel pipe 8. This embodiment, by dividing the space of the cavity, can form a hollow interlayer, and then concrete can be poured according to the requirements of load-bearing capacity and structural strength.

[0066] One side of the third plate 4 is connected to the second plate 3, and the other side of the third plate 4 is connected to the first plate 2 or the steel pipe 8. Multiple third plates 4 are arranged in the second chamber 52 to divide the second chamber 52 into multiple sub-chambers 521. The inner cavity of the steel pipe 8 and / or the sub-chambers 521 are filled with a concrete layer 7.

[0067] In other words, multiple third plates 4 divide the second chamber 52 into multiple relatively independent sub-chambers 521. The length direction of the third plate 4 is parallel to the axial direction of the steel pipe 8. It can not only play a vertical load-bearing role itself, but also improve the bonding between concrete and steel plate, improve the overall performance stability, reduce the amount of pouring, and achieve the purpose of lightweight and high strength.

[0068] Optionally, at least some of the components of the steel pipe 8, the first plate 2, the second plate 3, and the third plate 4 are fixed together to form a prefabricated component.

[0069] The steel-concrete composite column 100 of this embodiment possesses advantages such as lightweight, high strength, impact resistance, earthquake resistance, and fire resistance. This embodiment fully utilizes the lightweight, high strength, and high load-bearing characteristics of the hollow-core steel-concrete composite column 100, improving the buckling deformation resistance of the outer steel tube and plates, as well as the restraint effect between steel and concrete. The steel-concrete composite column 100 of this embodiment also has advantages such as high load-bearing capacity and excellent synergistic performance, and can be used for the vertical load-bearing components of newly constructed structures and the reinforcement and renovation of existing load-bearing components 9.

[0070] The following describes some other specific embodiments of the steel-concrete composite column 100 of this utility model.

[0071] like Figures 1 to 8 As shown, the steel-concrete composite column 100 of this utility model embodiment includes at least three steel pipes 8, a first plate 2, a second plate 3, and a third plate 4. The length directions of the first plate 2, the second plate 3, and the third plate 4 are all parallel to the axial direction of the steel pipes 8.

[0072] At least three steel pipes 8 are arranged in parallel. For example, the number of steel pipes 8 can be 3, 4, or 6. In practical applications, the selection can be made according to the size, shape, and load-bearing capacity of the composite column to be constructed. The at least three steel pipes 8 are arranged at intervals along a circular trajectory on a plane perpendicular to the axis of the steel pipes 8. Preferably, the number of steel pipes 8 is at least four, thereby ensuring that the space enclosed by the multiple steel pipes 8 is more orderly and improving the load-bearing performance and structural stability of the composite column.

[0073] The circular trajectory can be a circle, a rectangle, or a roughly regular polygon. When the circular trajectory is a circle, at least three steel pipes 8 are arranged at equal intervals in the circumferential direction. When the circular trajectory is a rectangle or a roughly regular polygon, each steel pipe 8 is located at one corner of the regular polygon. The accompanying drawings in this embodiment show the case with four steel pipes 8, and the circular trajectory is a roughly square shape.

[0074] A reinforcing cage 6 is installed inside the steel pipe 8, within the inner cavity of the steel pipe 8, and is fixed in the inner cavity of the steel pipe 8 by concrete pouring. The diameter D of the main reinforcing bars in the reinforcing cage 6 is 15mm to 20mm, and the steel grade of the main reinforcing bars is not lower than HRB500. The strength grade of the steel pipe 8 is not lower than Q460, and the strength grade of the concrete layer 7 is not lower than C40. Compared with traditional circular steel pipe concrete, the concrete in the steel pipe 8 is reinforced internally using the reinforcing cage 6. Compared with the corners of traditional square section columns, the presence of corner-reinforced steel pipe concrete effectively improves the problem of corner stress concentration causing corner steel plate tearing.

[0075] like Figure 3 As shown, the first plate 2 is a corrugated plate, specifically a corrugated steel plate. The first plate 2 includes a first segment 21 located at the crest of the wave, a second segment 22 located at the trough of the wave, and a third segment 23 connecting the first segment 21 and the second segment 22. The angle between the third segment 23 and the first segment 21 and the second segment 22 is 45 degrees. The wave height of the first plate 2 is 50mm to 100mm. The strength grade of the first plate 2 is not lower than Q460.

[0076] In this embodiment, the wave length L1 can be adjusted according to the actual dimensions of the project, and the wave height H (the distance between the center lines of the wave crest and the wave trough) can be 50mm, 60mm, 75mm, 88mm or 100mm.

[0077] Compared to traditional flat plates, corrugated steel plates have a larger contact area with the concrete in the interlayer, forming a stronger mechanical interlocking effect, preventing premature separation, and enhancing their resistance to buckling deformation under external loads, thereby improving the combined effect and restraint.

[0078] The first plate 2 is disposed between two steel pipes. Specifically, along the annular trajectory, the first plate 2 is disposed between two adjacent steel pipes to define a cavity between at least three steel pipes and multiple first plates 2. The cross-section of the cavity is approximately the same as the shape of the annular trajectory. For example, in the attached figures of this embodiment, the annular trajectory is approximately square, the liquid level in the cavity is approximately square, and the corners of the cavity are arc-shaped due to the presence of the steel pipes. This reduces stress concentration at the corners, improves tear resistance, and enhances stability and load-bearing capacity.

[0079] like Figure 7 As shown, the steel pipe and the first plate 2 can be prefabricated in the factory. Specifically, the round steel pipes at the corners and the corrugated steel plate (first plate 2) are welded together in the factory to form the external load-bearing components. Figure 8 As shown, depending on the actual project conditions and on-site hoisting and transportation capabilities, the core concrete and steel cage 6 inside the corner steel pipes can also be poured and cured in the factory to form a unified precast component, which not only facilitates transportation but also improves on-site construction efficiency.

[0080] like Figure 4 As shown, multiple second plates 3 are sequentially connected to form an annular column, which is coaxially arranged with the cavity. It should be understood that the multiple second plates 3 are sequentially arranged and welded together along a trajectory that is approximately concentric with the annular trajectory, so that the cross-section of the annular column is circular or polygonal. For example, an annular column formed by welding multiple arc-shaped second plates 3 is circular, or an annular column formed by welding multiple flat second plates 3 is octagonal.

[0081] In this embodiment, eight second plates 3 are welded into an octagonal annular column. Four second plates A31 are approximately parallel to their corresponding first plates 2, while the other four second plates B32 are positioned between adjacent second plates A31. The angle between the first plate A31 and the second plate B32 is 45 degrees. The second plates B32 are positioned correspondingly to the steel pipe and are spaced apart. The use of eight second plates 3 can reduce the problem of stress concentration at the corners.

[0082] The length L2 of the second plate A31 and the length L3 of the second plate B32 can be selected according to the actual engineering dimensions.

[0083] The inner cavity of the annular tube column can serve as a hollow space or accommodate existing buildings. It can reinforce and strengthen vertical load-bearing components such as columns and piers of existing buildings. High-strength concrete or grout is poured between the annular tube column and the existing load-bearing components to achieve structural reinforcement. For example, the cubic compressive strength of the structure after concrete pouring is not less than 40 MPa.

[0084] An annular tubular column is disposed within a cavity to divide the cavity into a first chamber 51 corresponding to the inner wall surface of the annular tubular column and a second chamber 52 corresponding to the outer wall surface of the annular tubular column. The first chamber 51 is the inner cavity of the annular tubular column, and the second chamber 52 is the chamber between the outer wall of the annular tubular column and the first plate 2 and the steel pipe. This embodiment, by dividing the space of the cavity, can form a hollow interlayer, and then concrete can be poured according to the requirements of load-bearing capacity and structural strength.

[0085] The annular column can also be prefabricated in the factory. Specifically, eight second plates 3 can be welded in the factory to form an octagonal annular column, thus ensuring the quality of the welding.

[0086] One side of the third plate 4 is connected to the second plate 3, and the other side of the third plate 4 is connected to the first plate 2 or the steel pipe. Multiple third plates 4 are arranged in the second chamber 52 to divide the second chamber 52 into multiple sub-chambers 521. The inner cavity of the steel pipe and / or the sub-chambers 521 are filled with a layer of concrete 7.

[0087] like Figure 5 As shown, the length L4 of the third plate 4 can be selected according to the interval between the second plate 3 and the first plate 2. The thickness n of the third plate 4 is 20mm to 30mm. For example, the thickness of the third plate 4 can be 20mm, 25mm, 28mm, or 30mm. When the thickness of the third plate 4 is too thin, it is not easy to provide good load-bearing capacity, and it is prone to deformation, which may lead to ineffective bonding between the concrete and the steel pipe and the plate. When the thickness of the third plate 4 is too thick, it may result in high manufacturing costs and fail to achieve the goal of lightweight construction.

[0088] The width of the third plate 4 is approximately the distance between the first plate 2 and the second plate 3. Therefore, the third plate 4 has the function of adjusting the distance between the first plate 2 and the second plate 3, thereby controlling the size of the intermediate interlayer to meet the designed load-bearing strength, improve practicality and the stability of the overall structure.

[0089] In other words, multiple third plates 4 divide the second chamber 52 into multiple relatively independent sub-chambers 521. The length direction of the third plate 4 is parallel to the axis direction of the steel pipe. It can not only play a vertical load-bearing role itself, but also improve the bonding between concrete and steel plate, improve the overall performance stability, reduce the amount of pouring, and achieve the purpose of lightweight and high strength.

[0090] The third plate 4 can be welded on-site. After the prefabricated component consisting of the steel pipe and the first plate 2, as well as the annular pipe column, are hoisted and aligned, the welding of the third plate 4 can be carried out. Of course, if transportation is convenient, the prefabricated component consisting of the steel pipe and the first plate 2, the annular pipe column, and the third plate 4 can also be welded together into a single prefabricated component, and the integrated prefabrication can be completed directly in the factory.

[0091] like Figure 7 and Figure 8 As shown, the concrete pouring for each sub-chamber 521 can be completed on-site. During the pouring process, the concrete for the interlayer of sub-chamber 521 can be poured in layers and batches to form a concrete composite column with corner-reinforced hollow interlayer corrugated steel pipes.

[0092] After completing the above pouring steps, and once the concrete has cured to the specified strength, subsequent construction procedures can be carried out.

[0093] The steel-concrete composite column 100 of this embodiment possesses advantages such as lightweight, high strength, impact resistance, earthquake resistance, and fire resistance. This embodiment fully utilizes the lightweight, high strength, and high load-bearing characteristics of the hollow-core steel-concrete composite column 100, improving the buckling deformation resistance of the outer steel tube and plates, as well as the restraint effect between steel and concrete. The steel-concrete composite column 100 of this embodiment also has advantages such as high load-bearing capacity and excellent synergistic performance, and can be used for the vertical load-bearing components of newly constructed structures and the reinforcement and renovation of existing load-bearing components 9.

[0094] Furthermore, the first plate 2 or the second plate 3 is provided with grouting holes, the diameter of which is not less than 150mm.

[0095] This embodiment can be used for heavy load-bearing structures as well as for the reinforcement and renovation of existing buildings. It has high seismic performance, strong fire resistance, and can be constructed in a prefabricated manner. It has important practical significance for the high performance of traditional hollow steel tube concrete structures and provides a useful reference for the innovation of modern engineering main structure forms.

[0096] This embodiment effectively utilizes the lightweight and high-strength properties of hollow-core steel-concrete composite columns. The corrugated steel plates, combined with corner-stiffened steel-concrete composite components, significantly enhance the confinement effect and load-bearing capacity of the composite column, effectively avoiding stress concentration at the corners of traditional square-section steel columns and the potential tearing risk of the steel plates. This embodiment shows promising application prospects in long-span bridge piers, bridge towers, vertical load-bearing components of super high-rise buildings, and underground space engineering.

[0097] like Figures 9 to 11 As shown, the lattice column of this utility model embodiment includes a steel-concrete composite column 100 and a connecting column 8. The steel-concrete composite column 100 is as described in any of the above embodiments, and the number of steel-concrete composite columns 100 is at least two. The connecting column 8 connects two adjacent steel-concrete composite columns 100.

[0098] Based on the above embodiments, a lattice-type structural scheme can also be adopted, in which multiple steel-concrete composite columns 100 are connected to form a lattice structure. The construction process of each steel-concrete composite column 100 is basically the same as in the above embodiments. After the construction of multiple steel-concrete composite columns 100 is completed, horizontal steel pipes (connecting columns 8) are welded between the steel pipes of two adjacent steel-concrete composite columns 100. By combining double or multi-limb sections, a heavy-duty load-bearing scheme for lattice columns is formed. Figure 9 The structure shown includes two steel-concrete composite columns 100. Figure 11 The structure shown contains four steel-concrete composite columns 100.

[0099] The lattice column in this embodiment adopts a combination of multi-limb sections such as double-limb and four-limb sections to form a lattice heavy load-bearing column, which can be used for the construction of large bridges, offshore platforms and other structures.

[0100] like Figures 12 to 15 As shown, the reinforcement device of this utility model embodiment is used to reinforce existing load-bearing components. The reinforcement device includes a steel-concrete composite column 100. The steel-concrete composite column 100 is the steel-concrete composite column 100 as described in any of the above embodiments. The existing load-bearing component is located in the middle of the first chamber 51 of the steel-concrete composite column 100. A concrete layer 7 is poured between the existing load-bearing component 9 and the inner wall of the annular column.

[0101] like Figure 14 and Figure 15 As shown, when applied to the reinforcement of existing load-bearing components:

[0102] (1) Install steel plates (second plates) around the existing load-bearing components. In this step, the steel pipe can be connected by welding eight steel plates (second plates) on site. Grouting holes for concrete pumping are left at the top or bottom. The diameter of the grouting holes is not less than 150mm. After welding, a ring-shaped pipe column is formed.

[0103] (2) Pour concrete into the annular pipe column. Pour concrete into the annular pipe column through the reserved grouting hole in step (1), and vibrate the pipe wall of the steel pipe to remove air bubbles and increase the density of the concrete.

[0104] (3) On-site assembly of the corner steel pipes, corrugated steel plates (first plate), and stiffening ribs (third plate). In this step, the factory-processed steel pipes and corrugated steel plates are hoisted into place on-site, and the stiffening ribs are welded together. The corrugated steel plates have concrete grouting holes with a diameter of not less than 150mm. Figure 14 The concrete and steel cage inside the steel pipe can be prefabricated together with the steel pipe in the factory. Figure 15 The concrete inside the steel cage and steel pipe is poured in subsequent steps.

[0105] (4) Pouring interlayer concrete. In this step, concrete is poured into each sub-chamber through the concrete grouting holes reserved in step (3), and the pipe wall of the first plate is vibrated to increase the density of the concrete.

[0106] Compared with steel-concrete composite columns in related technologies, the advantages and innovations of this utility model are reflected in the following aspects:

[0107] (1) Reduction of local buckling phenomenon: Compared with ordinary steel plate, the use of corrugated steel plate for outer steel pipe can significantly reduce the local buckling phenomenon of column under external load. The contact area between corrugated steel plate and interlayer concrete is increased, which enhances the restraint effect and combined effect of outer steel pipe and interlayer concrete.

[0108] (2) Avoidance of stress concentration at corners: Compared with conventional square-encased hollow steel-concrete composite columns, this utility model strengthens the corner section by setting up a round steel-concrete composite member with built-in steel cage at the corner, which can effectively avoid the corner stress concentration phenomenon of traditional columns and the problem of corner steel tube tearing.

[0109] (3) Improvement of axial compression bearing capacity: The presence of round steel pipe concrete with built-in steel cages at the corners of the composite column can improve the overall bearing capacity of the composite column. The increased interface contact between the corrugated steel plate and the interlayer concrete prevents premature separation and enhances the restraint effect on the interlayer concrete. At the same time, the presence of stiffening ribs enables the formation of interlayer cavities, further improving the combination and restraint effect with the interlayer concrete. The combination of these three factors can effectively improve the bearing capacity of the composite column.

[0110] (4) Reinforcement of existing load-bearing components: The internal cavity of the composite column can be used to reinforce the vertical load-bearing components of the existing building structure. The gap between the internal polygonal steel pipe and the existing building components can be filled with high-strength concrete or grout, giving full play to the restraining effect of the internal steel pipe and the entire composite column on the reinforced components, and significantly improving the load-bearing performance of the existing building.

[0111] (5) The combined column involved in this utility model can be combined in the form of multiple limbs such as double limbs and four limbs. The steel pipes at the corner of the combined column are welded to the horizontal steel pipes to connect the different limbs, which can form a lattice-type combined column, which can be used for the construction of large heavy-duty bridge piers, underground projects, etc.

[0112] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0113] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0114] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0115] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0116] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0117] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A steel-concrete composite column, characterized in that, include: At least three steel pipes are arranged in parallel and spaced apart along a circular trajectory on a plane perpendicular to the axial direction of the steel pipes. A first plate is disposed between two of the steel pipes along the annular trajectory, with the first plate disposed between two adjacent steel pipes to define a cavity between the at least three steel pipes and the plurality of first plates; The second plate, and a plurality of the second plates are connected in sequence to form an annular column. The annular column is arranged coaxially with the cavity. The annular column is disposed in the cavity to divide the cavity into a first chamber corresponding to the inner wall surface of the annular column and a second chamber corresponding to the outer wall surface of the annular column. The third plate has one side connected to the second plate and the other side connected to the first plate or the steel pipe. Multiple third plates are disposed in the second chamber to divide the second chamber into multiple sub-chambers. The inner cavity of the steel pipe and / or the sub-cavity are filled with a layer of concrete.

2. The steel-concrete composite column according to claim 1, characterized in that, The first board is a wave plate.

3. The steel-concrete composite column according to claim 2, characterized in that, The first plate includes a first section located at the crest of a wave, a second section located at the trough of a wave, and a third section connecting the first section and the second section, wherein the third section forms an angle of 45 degrees with the first section and the second section; And / or, the wave height of the first plate is 50 mm to 100 mm.

4. The steel-concrete composite column according to claim 1, characterized in that, The number of steel pipes is at least four; And / or, the annular trajectory is a circle, a rectangle or a regular polygon, and the steel pipe is located at each corner of the annular trajectory; And / or, the length directions of the first plate, the second plate, and the third plate are all parallel to the axial direction of the steel pipe.

5. The steel-concrete composite column according to claim 1, characterized in that, It also includes a reinforcing cage, which is disposed in the inner cavity of the steel pipe and is fixed in the inner cavity of the steel pipe by concrete pouring.

6. The steel-concrete composite column according to claim 5, characterized in that, The diameter of the main reinforcing bars in the steel cage is 15mm to 20mm, and the grade of the main reinforcing bars is not lower than HRB500.

7. The steel-concrete composite column according to claim 1, characterized in that, The strength grade of the steel pipe and the first plate is not lower than Q460, and the strength grade of the concrete layer is not lower than C40; And / or, the thickness of the third plate is 20 mm to 30 mm; And / or, the first plate or the second plate is provided with grouting holes, the diameter of which is not less than 150mm.

8. The steel-concrete composite column according to any one of claims 1 to 7, characterized in that, At least some of the steel pipe, the first plate, the second plate, and the third plate are fixed together to form a prefabricated component.

9. A lattice column, characterized in that, include: A steel-concrete composite column, wherein the steel-concrete composite column is as described in any one of claims 1 to 8, and the number of steel-concrete composite columns is at least two; A connecting column, which connects two adjacent steel-concrete composite columns.

10. A reinforcement device, characterized in that, For reinforcing existing load-bearing components, the reinforcing device includes: A steel-concrete composite column, wherein the steel-concrete composite column is as described in any one of claims 1 to 8, wherein an existing load-bearing member is located in the middle of the first chamber of the steel-concrete composite column, and a concrete layer is poured between the existing load-bearing member and the inner wall of the annular column.

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