A new type of cold-formed steel frame-double X-shaped bracing structure

Abstract

The present application relates to cold-formed steel structure technical field, disclose a kind of novel assembly type cold-formed steel frame-double layer X-shaped support structure, wherein, frame body is connected by a pair of cold-formed steel beam and a pair of cold-formed steel column;A pair of support units are arranged in parallel in frame body, and support unit includes a pair of end plate, energy dissipation section and four cold-formed steel supports, energy dissipation section is connected between a pair of end plate by high-strength bolt, and two cold-formed steel supports are connected on end plate, and four cold-formed steel supports are arranged in X shape;Four corner joint plates are arranged at four inner corners of frame body, and cold-formed steel beam, cold-formed steel column and cold-formed steel support are connected on corner joint plate by high-strength bolt;A pair of middle joint plates are arranged between two energy dissipation sections, and cold-formed steel column and cold-formed steel support are connected on middle joint plate by high-strength bolt, and the present application can solve the problems, such as low shear bearing capacity and weak energy dissipation capacity of traditional cold-formed steel composite wall, after the action of earthquake, only damaged energy dissipation section needs to be replaced to achieve the purpose of repairing structure.

Description

Technical Field

[0001] This invention relates to the field of cold-formed steel structure technology, and in particular to a novel prefabricated cold-formed steel frame-double-layer X-shaped support structure. Background Technology

[0002] Traditional concrete and masonry structures suffer from drawbacks such as high land resource consumption and non-recyclable building materials. While cold-formed steel structures offer advantages like light weight, convenient construction, and environmental friendliness, aligning with the requirements of industrialized construction, traditional cold-formed steel composite walls suffer from technical bottlenecks such as insufficient lateral stiffness and weak energy dissipation capacity. Their application has long been limited to low-rise buildings, failing to meet the seismic performance requirements of multi-story and high-rise buildings. Improving the shear bearing capacity and energy dissipation capacity of cold-formed steel structures, while simultaneously achieving rapid post-earthquake structural function recovery, is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] The purpose of this invention is to provide a novel prefabricated cold-formed steel frame-double-layer X-shaped support structure, which aims to solve or improve at least one of the above-mentioned technical problems, such as low shear bearing capacity and weak energy dissipation capacity of traditional cold-formed steel composite walls, and improve structural toughness. After an earthquake, the structure can be repaired simply by replacing the damaged energy dissipation section.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a novel prefabricated cold-formed steel frame-double-layer X-shaped support structure, comprising: The frame structure is composed of a pair of parallel cold-formed steel beams and a pair of parallel cold-formed steel columns connected together. A pair of support units are arranged side by side in the frame body along the length of the cold-formed steel column. The support unit includes a pair of end plates, an energy-dissipating section and four cold-formed steel supports. The energy-dissipating section is connected between the pair of end plates by high-strength bolts. Two of the cold-formed steel supports are connected to the end plates. The four cold-formed steel supports are arranged in an X shape. Four corner node plates are set at the four inner corners of the frame body, and the cold-formed steel beams, cold-formed steel columns and cold-formed steel supports are connected to the corner node plates by high-strength bolts; A pair of central node plates are set between the two energy-consuming sections, and the cold-formed steel column and the cold-formed steel support are connected to the central node plates by high-strength bolts.

[0005] Optionally, the two energy-consuming sections are located at 1 / 4 and 3 / 4 of the height of the frame.

[0006] Optionally, the outer corners of the frame are connected to pull-out resistant members by high-strength bolts.

[0007] Optionally, a magnesium crystal plate is connected to the frame body by self-tapping screws.

[0008] Optionally, the cold-formed steel beam and the cold-formed steel column are also connected by L-shaped connectors via high-strength bolts.

[0009] Optionally, the cold-formed steel beam includes a pair of double-limb cold-formed L-shaped rolled-edge angle steels, which are spliced ​​back to back and connected by self-tapping screws.

[0010] Optionally, the cold-formed steel column includes a pair of double-limb cold-formed C-shaped steels, which are joined back-to-back and connected by self-tapping screws.

[0011] Optionally, the cold-formed steel support includes a pair of cold-formed angle steels I, which are joined back-to-back and connected by self-tapping screws.

[0012] Optionally, the energy-consuming section includes four cold-bent angle steels II, four cold-bent angle steels III, and an energy-consuming plate. The four cold-bent angle steels II and the four cold-bent angle steels III form two clamping bodies to hold the energy-consuming plate. The overlapping parts of the cold-bent angle steels II and III are connected by high-strength bolts. The cold-bent angle steels II and III are connected to the energy-consuming plate by high-strength bolts. The cold-bent angle steels II are connected to the end plate by high-strength bolts.

[0013] The present invention discloses the following technical effects: This invention establishes a clear load-bearing and energy-dissipating dual-function mechanism by setting up a double-layer X-shaped support unit and connecting energy-dissipating sections in series within it. Under normal use and minor earthquakes, the X-shaped support provides sufficient lateral stiffness; under major earthquakes, the energy-dissipating sections, acting as replaceable safety devices, preferentially enter plasticity, dissipating seismic energy through shear hysteretic deformation, thereby protecting the main structure such as cold-formed steel beams and cold-formed steel columns from damage.

[0014] In this invention, the energy-dissipating section is connected to the end plate using high-strength bolts. The corner and central node plates are also connected using high-strength bolts, enabling the entire structure to be fully prefabricated. After an earthquake, only the bolts at the damaged locations need to be removed to replace the energy-dissipating section; no welding or cutting is required. This allows for rapid restoration of the structure's functionality and significantly improves the building's seismic resilience and overall life-cycle economic efficiency.

[0015] This invention reliably connects cold-formed steel beams, cold-formed steel columns, and cold-formed steel supports through corner gusset plates at the four inner corners of the frame and two central gusset plates, forming a stable, geometrically invariant system. The design of the gusset plates being embedded at the joints of the components ensures a direct force transmission path, avoids stress concentration, and improves the overall integrity and lateral resistance of the structure.

[0016] All components of this invention can be prefabricated in the factory, and only high-strength bolts and self-tapping screws are needed for on-site assembly, realizing dry construction. It has the advantages of short construction cycle, no wet operation on site, low noise, and recyclable materials. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cold-formed steel beam of the present invention; Figure 3 This is a schematic diagram of the cold-formed steel column of the present invention; Figure 4 This is a schematic diagram of the cold-formed steel support structure of the present invention; Figure 5 This is a schematic diagram of the connection of the L-shaped connector of the present invention; Figure 6 This is a schematic diagram of the connection of the corner node plate of the present invention; Figure 7 This is a schematic diagram of the energy-consuming section of the present invention; Figure 8 This is a schematic diagram showing the connection between the energy-consuming section and the cold-formed steel support of the present invention.

[0018] In the diagram: 1. Cold-formed steel beam; 2. Cold-formed steel column; 3. Cold-formed steel support; 4. Corner node plate; 5. Energy-dissipating section; 6. End plate; 7. L-shaped connector; 8. High-strength bolt; 9. Pull-out member; 10. Self-tapping screw; 11. Middle node plate; 12. Magnesium crystal plate; 101. Double-limb cold-formed L-shaped rolled angle steel; 201. Double-limb cold-formed C-shaped steel; 301. Cold-formed angle steel I; 501. Cold-formed angle steel II; 502. Cold-formed angle steel III; 503. Energy-dissipating plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1 to 8 This invention provides a novel prefabricated cold-formed steel frame-double-layer X-shaped support structure, comprising: The frame structure is composed of a pair of parallel cold-formed steel beams 1 and a pair of parallel cold-formed steel columns 2 connected together. A pair of support units are arranged side by side in the frame structure along the length of the cold-formed steel columns 2. Each support unit includes a pair of end plates 6, an energy-dissipating section 5, and four cold-formed steel supports 3. The energy-dissipating section 5 is connected between the pair of end plates 6 by high-strength bolts 8. Two cold-formed steel supports 3 are connected to the end plates 6. The four cold-formed steel supports 3 are arranged in an X-shape and are welded to the end plates 6. Four corner node plates 4 are located at the four inner corners of the frame structure. Beam 1, cold-formed steel column 2, and cold-formed steel support 3 are connected to corner node plate 4 by high-strength bolts 8; corner node plate 4 is embedded in the component splicing of cold-formed steel beam 1, cold-formed steel column 2, and cold-formed steel support 3, and is connected by high-strength bolts 8; a pair of middle node plates 11 are set between two energy-consuming sections 5, and cold-formed steel column 2 and cold-formed steel support 3 are connected to middle node plates 11 by high-strength bolts 8; one side of middle node plate 11 is embedded in the middle of the height of cold-formed steel column 2 and is connected by high-strength bolts 8, and the other side is connected to cold-formed steel support 3 by high-strength bolts 8.

[0022] In this embodiment, the two energy dissipation sections 5 are located at 1 / 4 and 3 / 4 of the frame height. This location design is an optimized arrangement based on structural mechanics principles. The cold-formed steel wall has a large height-to-width ratio; the main purpose of arranging double-layer X-shaped supports is to reduce the angle between the supports and the horizontal direction, resulting in a larger horizontal load component during force transmission. This allows the energy dissipation sections to primarily bear shear force, fully facilitating shear deformation. Placing the energy dissipation sections 5 here enables them to generate more significant shear deformation under lateral loads, thereby more fully activating the energy dissipation mechanism and maximizing seismic energy dissipation efficiency.

[0023] In this embodiment, the outer corners of the frame are connected to pull-out members 9 via high-strength bolts 8. The pull-out members 9 connect the upper and lower structural sections, significantly enhancing the structure's anchorage and anti-overturning capacity within the overall lateral force resisting system. Under earthquake or wind loads, a large upward pull-out force may occur on one side of the structure. The pull-out members 9 effectively transfer this force to the foundation or substructure, preventing the corners of the frame from detaching or lifting, thus ensuring the overall stability and safety of the structure under extreme loads. This is particularly suitable for areas with high wind loads or high-rise cold-formed steel buildings.

[0024] In this embodiment, a magnesium crystal plate 12 is connected to the frame body via self-tapping screws 10, located at the rolled edge of the frame body. The addition of the magnesium crystal plate 12 brings multiple additional benefits. First, as a cladding panel, the magnesium crystal plate 12 works together with the cold-formed steel frame to further increase the lateral stiffness and load-bearing capacity of the structure by 20%-40% through the skin effect. Second, the magnesium crystal plate 12 is a Class A non-combustible material, which can significantly improve the overall fire resistance rating of the building. Third, the magnesium crystal plate 12 has good sound insulation and moisture-proof properties, which can improve living comfort. Finally, the self-tapping screw connection method facilitates the installation, disassembly, and replacement of the panel, and is fully compatible with the prefabricated design concept of the structure.

[0025] In this embodiment, the cold-formed steel beam 1 and the cold-formed steel column 2 are connected by an L-shaped connector 7 via high-strength bolts 8. At the connection between the cold-formed steel beam 1 and the cold-formed steel column 2, one side of the L-shaped connector 7 is connected to the flange of the cold-formed steel column 2 via high-strength bolts 8, and the other side is connected to the web of the cold-formed steel beam 1 via high-strength bolts 8. The L-shaped connector 7 serves as an auxiliary reinforcement for the beam-column joint, forming a dual connection mechanism of corner node plate 4 + L-shaped connector 7. The L-shaped connector 7 provides additional bending and shear resistance from the outside of the beam and column, effectively constraining the deformation of the joint area and preventing excessive relative rotation between the beam and column. This not only improves the safety reserve of the joint's bearing capacity but also enhances the ductility of the joint, avoiding brittle failure, and is particularly suitable for rigid or semi-rigid joint design requirements that need to resist bending moments.

[0026] In this embodiment, the cold-formed steel beam 1 includes a pair of double-limb cold-formed L-shaped rolled-edge angle steels 101, which are joined back-to-back and connected by self-tapping screws 10. This structure forms a T-shaped cross-section beam. The T-shaped cross-section has greater bending stiffness and stronger torsional resistance with the same amount of steel. The back-to-back joining and connection with self-tapping screws 10 ensures that the two limbs work together and avoids instability of a single limb.

[0027] In this embodiment, the cold-formed steel column 2 includes a pair of double-limb cold-formed C-shaped steels 201, which are joined back-to-back and connected by self-tapping screws 10. This structure forms an I-shaped cross-section column. The I-shaped cross-section is an ideal cross-sectional form for bearing axial compression and bending moment, with a reasonable distribution of strong and weak axes in two directions. The back-to-back joining of the double-limb C-shaped steels not only achieves performance equivalent to welded I-beams but also avoids welding residual stress and deformation. The connection of the self-tapping screws 10 ensures the integrity of the double limbs.

[0028] In this embodiment, the cold-formed steel support 3 includes a pair of cold-formed angle steels I301, which are joined back-to-back and connected by self-tapping screws 10. This structure forms a T-section support. Compared with a single-angle cold-formed steel support, the T-section support has a significantly increased radius of gyration and a decreased slenderness ratio, thereby greatly improving the support's buckling resistance, enabling it to withstand higher critical loads under compression, and to more effectively transfer tensile forces under tension.

[0029] In this embodiment, the energy-dissipating section 5 includes four cold-bent angle steels II (501), four cold-bent angle steels III (502), and an energy-dissipating plate 503. The four cold-bent angle steels II (501) and III (502) form two clamping bodies to hold the energy-dissipating plate 503. The overlapping parts of the cold-bent angle steels II (501) and III (502) are connected by high-strength bolts 8. The cold-bent angle steels II (501) and III (502) are connected to the energy-dissipating plate 503 by high-strength bolts 8. The cold-bent angle steels II (501) are connected to the end plate 6 by high-strength bolts 8. This structure provides a clamp-type replaceable energy-dissipating component. The energy-dissipating plate 503 is firmly clamped by four double-limb L-shaped angle steels, forming a clearly defined shear yield zone. Cold-formed angle steel II 501 and cold-formed angle steel III 502 serve as force transmission and constraint components. They can uniformly convert the axial force transmitted from the support into shear force on the energy-dissipating plate 503, and also provide out-of-plane constraints for the energy-dissipating plate 503 to prevent out-of-plane deformation during shear deformation, thereby ensuring that the energy-dissipating plate 503 can undergo sufficient and stable hysteretic deformation. All connections use high-strength bolts 8, making the energy-dissipating section 5 an independently disassembled and replaceable module.

[0030] The load-bearing capacity and energy dissipation capacity of this invention are determined by the dimensions and yield strength of the energy dissipation plate 503. Under seismic load, the cold-formed steel support 3 causes the energy dissipation section 5 to undergo horizontal displacement, and the seismic energy is dissipated through the shear hysteretic deformation of the energy dissipation section 5.

[0031] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, 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 invention.

[0032] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A novel prefabricated cold-formed steel frame-double-layer X-shaped support structure, characterized in that, include: The frame structure is composed of a pair of parallel cold-formed steel beams (1) and a pair of parallel cold-formed steel columns (2). A pair of support units are arranged side by side in the frame body along the length direction of the cold-formed steel column (2). The support unit includes a pair of end plates (6), an energy-dissipating section (5) and four cold-formed steel supports (3). The energy-dissipating section (5) is connected between the pair of end plates (6) by high-strength bolts (8). Two cold-formed steel supports (3) are connected on the end plates (6). The four cold-formed steel supports (3) are arranged in an X shape. Four corner node plates (4) are set at the four inner corners of the frame body. The cold-formed steel beam (1), the cold-formed steel column (2) and the cold-formed steel support (3) are connected to the corner node plates (4) by high-strength bolts (8). A pair of central node plates (11) are set between the two energy-consuming sections (5), and the cold-formed steel column (2) and the cold-formed steel support (3) are connected to the central node plates (11) by high-strength bolts (8).

2. The novel prefabricated cold-formed steel frame-double-layer X-shaped support structure according to claim 1, characterized in that, The two energy-consuming sections (5) are located at 1 / 4 and 3 / 4 of the height of the frame.

3. The novel prefabricated cold-formed steel frame-double-layer X-shaped support structure according to claim 1, characterized in that, The outer corner of the frame is connected to a pull-out member (9) by a high-strength bolt (8).

4. A novel prefabricated cold-formed steel frame-double-layer X-shaped support structure according to claim 1, characterized in that, A magnesium crystal plate (12) is connected to the frame body by self-tapping screws (10).

5. A novel prefabricated cold-formed steel frame-double-layer X-shaped support structure according to claim 1, characterized in that, The cold-formed steel beam (1) and the cold-formed steel column (2) are also connected by an L-shaped connector (7) via high-strength bolts (8).

6. A novel prefabricated cold-formed steel frame-double-layer X-shaped support structure according to claim 1, characterized in that, The cold-formed steel beam (1) includes a pair of double-limb cold-formed L-shaped rolled angle steels (101), which are spliced ​​back to back and connected by self-tapping screws (10).

7. A novel prefabricated cold-formed steel frame-double-layer X-shaped support structure according to claim 1, characterized in that, The cold-formed steel column (2) includes a pair of double-limb cold-formed C-shaped steels (201), which are joined back to back and connected by self-tapping screws (10).

8. A novel prefabricated cold-formed steel frame-double-layer X-shaped support structure according to claim 1, characterized in that, The cold-formed steel support (3) includes a pair of cold-formed angle steel I (301), which are back-to-back and connected by self-tapping screws (10).

9. A novel prefabricated cold-formed steel frame-double-layer X-shaped support structure according to claim 1, characterized in that, The energy-consuming section (5) includes four cold-bent angle steels II (501), four cold-bent angle steels III (502), and an energy-consuming plate (503). The four cold-bent angle steels II (501) and four cold-bent angle steels III (502) form two clamping bodies to hold the energy-consuming plate (503). The overlapping parts of the cold-bent angle steels II (501) and III (502) are connected by high-strength bolts (8). The cold-bent angle steels II (501) and III (502) are connected to the energy-consuming plate (503) by high-strength bolts (8). The cold-bent angle steels II (501) are connected to the end plate (6) by high-strength bolts (8).

Images