Steel structure column corner support-free cantilever composite plate structure and construction method

Abstract

The invention discloses a steel structure column angle support-free cantilever composite plate structure and a construction method, and belongs to the technical field of fabricated building structures. The structure comprises a steel plate bottom die, a profile steel framework and a profile steel composite floor, one end of the steel plate bottom die is connected with a steel column through welding, and the other end of the steel plate bottom die is a cantilever plate edge; the steel plate bottom die comprises a riffled plate, short stiffening ribs and wedge-shaped stiffening ribs, and the short stiffening ribs and the wedge-shaped stiffening ribs are arranged below the riffled plate and are welded with the riffled plate to form a bottom die system; the profile steel framework comprises cold-formed thin-walled C-shaped steel and a channel steel cushion block, and the cold-formed thin-walled C-shaped steel is welded and fixed with the steel plate bottom die through the channel steel cushion block; the section steel composite floor slab is formed by jointly pouring the section steel framework and concrete. Through the design of the steel plate bottom die and the steel reinforced concrete plate, the steel framework can be directly assembled at the steel column angle in a rooting mode, the composite floor is formed after concrete is poured, and therefore the situation that a steel column angle blind area cantilever plate is difficult to achieve is thoroughly solved.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated building structures, and in particular to a steel structure column corner support-free cantilevered composite plate structure and a construction method. Background Art

[0002] Prefabricated steel structures, due to their lightweight, high-strength, cost-effective, and efficient construction, are widely used in industrial and public buildings. They have a significant impact on project construction and are the preferred structural system for construction projects, playing an increasingly important role in urban renewal in my country. Currently, the most mature prefabricated steel structure system involves assembling steel beams and columns, then laying composite floor slabs or reinforced truss slabs, and then pouring concrete to form the overall structural system. This approach has been widely used in actual projects.

[0003] In industrial and public buildings, due to planning and construction requirements, there are many different approaches to exterior curtain walls. Floor slabs often need to be extended a certain distance, resulting in blind spots at the corners of steel columns where the floor slab reinforcement cannot take root. At the same time, there are no fulcrums at the cantilevered locations on steel structure construction sites, making it difficult to set up temporary supports. This makes cantilevered slabs difficult to implement, increasing the difficulty of design and construction.

[0004] Chinese patent CN212773372U discloses a simple support frame for the edge of a steel structure cantilever slab, used in the field of construction technology. This device, used for steel beam cantilever slabs, solves the difficulties of formwork and support installation on-site by providing a simple support frame, making it convenient and simple to use in actual projects. However, this patent cannot be used to solve the problem of cantilever slabs at the corners of steel columns, and only addresses the problem of cantilever slabs on steel beams at the construction level, making it not universally applicable. Summary of the Invention

[0005] The purpose of the present invention is to provide a support-free cantilevered composite slab structure and construction method for steel column corners, which can be rooted at the steel column corners by welding steel sections during the structural design stage, and concrete can be poured on the construction site to form a composite floor system, thereby solving the problem of difficult laying of cantilevered slabs at the steel column corners.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A steel structure column corner support-free cantilever composite plate structure, comprising a steel plate bottom formwork, a steel frame and a steel composite floor slab, wherein one end of the steel plate bottom formwork is connected to the steel column by welding, and the other end is a cantilever plate edge; the steel plate bottom formwork comprises a patterned steel plate, short stiffening ribs and wedge-shaped stiffening ribs, the short stiffening ribs and wedge-shaped stiffening ribs are arranged below the patterned steel plate and welded to the patterned steel plate to form a bottom formwork system; the steel frame comprises cold-bent thin-walled C-shaped steel and a channel steel pad, the cold-bent thin-walled C-shaped steel is welded and fixed to the steel plate bottom formwork by the channel steel pad, and the steel composite floor slab is cast together by the steel frame and concrete; the cold-bent thin-walled C-shaped steel is provided with a number of equally spaced distributions with a spacing range of 100-250mm, the length and width of the steel column are 500-2000mm, and the thickness of the patterned steel plate is 1-6mm.

[0008] Preferably, a plurality of wedge-shaped stiffening ribs are provided, and the wedge-shaped stiffening ribs are welded to the steel columns.

[0009] Preferably, there are a plurality of short stiffening ribs, the arrangement direction of the short stiffening ribs is perpendicular to the wedge-shaped stiffening ribs, and a short stiffening rib is arranged between two wedge-shaped stiffening ribs.

[0010] Preferably, one end of the cold-bent thin-walled C-shaped steel is in close contact with the steel column and is rigidly connected to the steel column by welding.

[0011] Preferably, a plurality of the channel-shaped steel pads are provided, and are connected to the patterned steel plate and the cold-bent thin-walled C-shaped steel by spot welding.

[0012] Preferably, the web of the cold-bent thin-walled C-shaped steel is provided with holes for steel bars to pass through at equal intervals according to structural requirements.

[0013] Preferably, the steel bars are passed through the cold-bent thin-walled C-shaped steel web and upper flange to arrange double-layer bidirectional reinforcement.

[0014] The present invention provides another technical solution: a construction method for a steel structure column corner support-free cantilevered composite plate structure, comprising the following steps:

[0015] S1: Weld wedge-shaped stiffeners to steel columns, and form a stable support system by welding short stiffeners to each other. Lay patterned steel plates on the stiffeners and weld them to form a steel plate bottom formwork.

[0016] S2: Place the channel steel pads according to the floor slab reinforcement structure measures, place the cold-bent thin-walled C-shaped steel on the channel steel pads, and tightly contact one end with the steel column through welding and rigid connection with the steel column. The channel steel pads are connected to the patterned steel plate and cold-bent thin-walled C-shaped steel through spot welding;

[0017] S3: Pass the steel bars through the cold-formed thin-walled C-shaped steel web and upper flange to arrange double-layer two-way reinforcement, and then pour concrete to form a steel composite floor system.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The support-free cantilevered composite plate structure and construction method of the steel structure column corner of the present invention have a steel plate bottom formwork rigidly connected to the steel column, and the wedge-shaped stiffening ribs and short stiffening ribs and the steel frame form a stable support system, which plays the role of a traditional construction template and temporary support, and is used for the steel column corner floor plate to cantilever outward, and does not need to be dismantled after construction is completed.

[0020] 2. The support-free cantilever composite plate structure and construction method of the steel structure column corner of the present invention has a steel frame connected to the steel plate bottom formwork, and one end is rigidly connected to the steel column, which solves the problem that traditional steel trusses are difficult to take root at the steel column corners. At the same time, the stability and bearing capacity of the cold-bent thin-walled C-shaped steel frame are greatly improved compared with traditional steel trusses. After the concrete is poured, a composite floor structure system is formed, which is safe and reliable.

[0021] 3. The steel structure column corner support-free cantilever composite plate structure and construction method of the present invention, the cantilever span of the steel plate bottom formwork and the height of the steel frame composite floor slab can be determined by calculation in the design stage according to the requirements of the plan. After prefabrication and assembly in the factory, they are transported to the site for pouring concrete, so that the structural system can meet the needs of various design plans. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall appearance of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention;

[0024] Figure 3 This is a bottom perspective view of the external structure of the present invention;

[0025] Figure 4 This is a disassembled diagram of the steel plate bottom mold of the present invention;

[0026] Figure 5 This is a disassembled view of the steel composite floor slab of the present invention.

[0027] In the figure: 1. Steel column; 2. Wedge-shaped stiffener; 3. Short stiffener; 4. Patterned steel plate; 5. Channel steel pad; 6. Cold-bent thin-walled C-shaped steel; 7. Rebar; 8. Steel composite floor slab. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-5 , an embodiment of the present invention provides a steel structure column corner support-free cantilever composite plate structure, including a steel plate bottom formwork, a steel frame and a steel composite floor 8, one end of the steel plate bottom formwork is connected to the steel column 1 by welding, and the other end is a cantilever plate edge; the steel plate bottom formwork includes a patterned steel plate 4, a short stiffening rib 3 and a wedge-shaped stiffening rib 2, the short stiffening rib 3 and the wedge-shaped stiffening rib 2 are arranged below the patterned steel plate 4, and are welded with the patterned steel plate 4 to form a bottom formwork system, specifically, a plurality of wedge-shaped stiffening ribs 2 are provided, the wedge-shaped stiffening ribs 2 are welded to the steel column 1, a plurality of short stiffening ribs 3 are provided, the short stiffening ribs 3 are arranged in a direction perpendicular to the wedge-shaped stiffening ribs 2, a short stiffening rib 3 is provided between the two wedge-shaped stiffening ribs 2, and a plurality of wedge-shaped stiffening ribs 2 and the short stiffening ribs 3 are arranged crosswise by welding to form a stable support system; in addition, the steel frame includes a cold-bent thin-wall C-shaped steel 6 and channel steel pad 5, one end of the cold-bent thin-walled C-shaped steel 6 is in close contact with the steel column 1 and is rigidly connected to the steel column 1 through welding, the cold-bent thin-walled C-shaped steel 6 is welded and fixed to the steel plate bottom mold through the channel steel pad 5, and a plurality of channel steel pads 5 are provided, and are connected to the patterned steel plate 4 and the cold-bent thin-walled C-shaped steel 6 by spot welding; the web of the cold-bent thin-walled C-shaped steel 6 is provided with holes for the passage of steel bars 7 at equal intervals according to structural requirements, and the steel bars 7 are arranged with double-layer two-way reinforcement through the web and upper flange of the cold-bent thin-walled C-shaped steel 6. Finally, the steel composite floor 8 is cast together by the steel skeleton and concrete; the cold-bent thin-walled C-shaped steel 6 is provided with several equally spaced distributions, the spacing range is 100-250mm, the length and width of the steel column 1 is 500-2000mm, and the thickness of the patterned steel plate 4 is 1-6mm.

[0030] In order to further better explain the above structure, an embodiment of the present invention also provides a construction method of a steel structure column corner support-free cantilevered composite plate structure, comprising the following steps:

[0031] S1: Weld the wedge-shaped stiffeners 2 to the steel column 1, and weld the short stiffeners 3 to each other to form a stable support system. Lay the patterned steel plates 4 on the stiffeners and weld them to form a steel plate bottom formwork.

[0032] S2: Place the channel steel pad 5 according to the floor reinforcement structural measures, place the cold-bent thin-walled C-shaped steel 6 on the channel steel pad 5, and tightly contact the steel column 1 with one end through welding and rigid connection with the steel column 1. The channel steel pad 5 is connected to the patterned steel plate 4 and the cold-bent thin-walled C-shaped steel 6 through spot welding;

[0033] S3: The steel bars 7 are passed through the web and upper flange of the cold-formed thin-walled C-shaped steel 6 to arrange double-layer bidirectional reinforcement, and then concrete is poured to form a steel composite floor slab 8 system.

[0034] The working principle of the present invention is: when in use, the cold-bent thin-walled C-shaped steel 6 is connected to the steel plate bottom formwork through the channel steel pad 5 to form a steel frame, and then connected to the steel column 1, and concrete is poured to form an overall structure; when the floor slab needs to be cantilevered from the column edge, the steel plate bottom formwork and the steel frame are welded to the steel column 1 by welding, and after pouring concrete and curing, a steel composite floor slab system is formed, thereby solving the problem that the steel truss cannot take root and the cantilever support is difficult, thereby realizing the laying of the steel column corner cantilever plate.

[0035] In summary, the present invention provides a steel structure column corner support-free cantilevered composite plate structure and construction method, in which the steel plate bottom formwork is rigidly connected to the steel column 1, and the wedge-shaped stiffening ribs 2 and the short stiffening ribs 3 are formed with the steel frame to form a stable support system, which plays the role of a traditional construction template and temporary support, and is used for the steel column corner floor plate to cantilever and extend outward, and does not need to be dismantled after the construction is completed; secondly, the steel frame provided by the present invention is connected to the steel plate bottom formwork, and one end is rigidly connected to the steel column 1, which solves the problem that traditional steel trusses at the steel column corners are difficult to take root, and at the same time, the stability and bearing capacity of the cold-bent thin-walled C-shaped steel frame are greatly improved compared with traditional steel trusses, and a composite floor plate structure system is formed after concrete pouring, which is safe and reliable; in addition, the cantilever span of the steel plate bottom formwork and the height of the steel frame composite floor plate of the present invention can be determined by calculation according to the requirements of the plan in the design stage, and after prefabrication and assembly in the factory, they are transported to the site for pouring concrete, so that the structural system can meet the needs of various design plans.

[0036] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A steel column corner cantilevered composite plate structure without support, characterized by: The invention comprises a steel plate bottom formwork, a steel frame and a steel composite floor slab (8), wherein one end of the steel plate bottom formwork is connected to the steel column (1) by welding, and the other end is a cantilevered plate edge; the steel plate bottom formwork comprises a patterned steel plate (4), short stiffening ribs (3) and wedge-shaped stiffening ribs (2), the short stiffening ribs (3) and wedge-shaped stiffening ribs (2) are arranged below the patterned steel plate (4) and are welded with the patterned steel plate (4) to form a bottom formwork system; the steel frame comprises a cold-bent thin-walled C-shaped steel (6) and a groove steel pad (5), the cold-bent thin-walled C-shaped steel (6) is welded and fixed to the steel plate bottom formwork through the groove steel pad (5), and the steel composite floor slab (8) is cast together by the steel skeleton and concrete; the cold-bent thin-walled C-shaped steel (6) is provided with a plurality of equally spaced distributions, the spacing range is 100-250mm, the length and width dimensions of the steel column (1) are 500-2000mm, and the thickness of the patterned steel plate (4) is 1-6mm.

2. The steel column corner support-free cantilevered composite plate structure according to claim 1, characterized in that: A plurality of wedge-shaped stiffening ribs (2) are provided, and the wedge-shaped stiffening ribs (2) are welded to the steel column (1).

3. The steel column corner support-free cantilevered composite plate structure according to claim 1, characterized in that: A plurality of short stiffening ribs (3) are provided, and the arrangement direction of the short stiffening ribs (3) is perpendicular to the wedge-shaped stiffening ribs (2). The short stiffening ribs (3) are provided between two wedge-shaped stiffening ribs (2).

4. The steel column corner support-free cantilevered composite plate structure according to claim 1, characterized in that: One end of the cold-bent thin-walled C-shaped steel (6) is in close contact with the steel column (1) and is rigidly connected to the steel column (1) by welding.

5. The steel column corner support-free cantilevered composite plate structure according to claim 1, characterized in that: A plurality of the channel-shaped steel pads (5) are provided and are connected to the patterned steel plate (4) and the cold-bent thin-walled C-shaped steel (6) by spot welding.

6. The steel column corner support-free cantilevered composite plate structure according to claim 1, characterized in that: The web of the cold-bent thin-walled C-shaped steel (6) is provided with holes at equal intervals for the steel bars (7) to pass through according to structural requirements.

7. The steel column corner support-free cantilevered composite plate structure according to claim 6, characterized in that: The steel bars (7) pass through the web and upper flange of the cold-bent thin-walled C-shaped steel (6) to arrange double-layer bidirectional reinforcement.

8. A construction method for a steel column corner support-free cantilevered composite slab structure as claimed in claim 1, characterized in that: The following steps are involved: S1: Welding the wedge-shaped stiffening ribs (2) to the steel column (1), welding the short stiffening ribs (3) to each other to form a stable support system, laying the patterned steel plate (4) on the stiffening ribs, and forming a steel plate bottom formwork by welding; S2: Place the channel steel pad (5) according to the floor slab reinforcement structural measures, place the cold-bent thin-walled C-shaped steel (6) on the channel steel pad (5), one end of which is tightly in contact with the steel column (1) and rigidly connected to the steel column (1) by welding, and the channel steel pad (5) is connected to the patterned steel plate (4) and the cold-bent thin-walled C-shaped steel (6) by spot welding; S3: The steel bars (7) are passed through the web and upper flange of the cold-bent thin-walled C-shaped steel (6) to arrange double-layer bidirectional reinforcement, and then concrete is poured to form a steel composite floor slab (8) system.

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