Reusable cold-formed section steel splicing section component and connecting piece

Abstract

The invention discloses a reusable cold-formed section steel spliced section component and a connecting piece, and relates to the technical field of steel structures, the reusable cold-formed section steel spliced section component comprises a component body; the component body comprises at least two cold-formed section steel sections, the two cold-formed section steel sections are connected through an interlocking structure to form a closed cavity structure, and the interlocking structure is used for locking the two cold-formed section steel sections so as to prevent the two cold-formed section steel sections from being separated from each other. According to the reusable cold-formed section steel splicing section component, the two cold-formed section steel sections are locked through the interlocking structure, so that the two cold-formed section steel sections are prevented from being separated from each other, and the mechanical property of the cold-formed section steel splicing section component is improved. In addition, the two cold-formed section steel sections are connected and fixed through the interlocking structure, so that the cold-formed section steel splicing section component is more convenient to disassemble and assemble, it is guaranteed that the cold-formed section steel splicing section component can be repeatedly used, and the recoverability is improved.

Description

Technical Field

[0001] This invention relates to the field of steel structure technology, and more specifically, to a reusable cold-formed steel composite section member and connector. Background Technology

[0002] Cold-formed steel members are products made from cold-formed steel plates or strips. Due to their superior strength-to-weight ratio, ease of manufacture, and recyclability, they are widely used in modern structural systems, such as mid-to-high-rise steel frames and prefabricated buildings. Traditional cold-formed steel members are typically manufactured with single-symmetric or point-symmetric open sections with relatively low torsional stiffness, such as Z-shaped and C-shaped sections, making them susceptible to torsional buckling. However, an effective method to improve the load-bearing capacity and torsional stability of traditional cold-formed steel members is to combine two or more separate sections into a closed or double-symmetric open section.

[0003] Traditional cold-formed steel composite section members typically connect two or more separate sections by welding, bolting, or screwing to form a closed or double-symmetrical open section. However, welding generates significant residual stress and deformation, leading to reduced strength and stability of the section and hindering dismantling, making the cold-formed steel composite section members unusable and poorly recyclable. Similarly, holes for bolts or screws in the section cause stress concentration and weaken the section strength. Furthermore, with prolonged use, bolts or screws are prone to loosening due to vibration or insufficient tightening, requiring regular inspection and maintenance. Moreover, repeated use of bolts or screws causes the holes in the section to enlarge, further weakening the section strength and reducing the load-bearing capacity and torsional stability of the cold-formed steel composite section member.

[0004] Therefore, how to improve the mechanical properties of cold-formed steel composite section members while ensuring their reusability has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a reusable cold-formed steel composite section member, so as to improve the mechanical properties of the cold-formed steel composite section member while ensuring its reusability.

[0006] Another object of the present invention is to provide a connector for connecting the above-mentioned reusable cold-formed steel composite section members.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A reusable cold-formed steel composite section member, comprising:

[0009] The component body includes at least two cold-formed steel sections, and the two cold-formed steel sections are connected by an interlocking structure to form a closed cavity structure. The interlocking structure is used to lock the two cold-formed steel sections to prevent them from separating from each other.

[0010] Optionally, in the above-mentioned reusable cold-formed steel composite section member, the cold-formed steel section has an opening, and the number of cold-formed steel sections is two, with the openings of the two cold-formed steel sections nested relative to each other.

[0011] Optionally, in the above-mentioned reusable cold-formed steel composite section member, the member body includes a first cold-formed steel section and a second cold-formed steel section. The interlocking structure includes a first protrusion disposed on the first cold-formed steel section and protruding towards the inner side of the first cold-formed steel section, and a first groove disposed on the second cold-formed steel section and formed on the outer side of the cold-formed steel section. The first groove is correspondingly disposed to the first protrusion. The first protrusion is inserted into the first groove, and the width of the first groove gradually decreases from the bottom of the groove to the opening of the groove to prevent the first protrusion from detaching from each other in the first groove.

[0012] Optionally, in the above-mentioned reusable cold-formed steel section members, the sidewall of the first cold-formed steel section is formed by stamping inward to create the first protrusion, and the sidewall of the second cold-formed steel section is formed by stamping inward to create the first groove on the outer side of the second cold-formed steel section; or,

[0013] The first cold-formed steel section is formed into the first protrusion by forging, and the second cold-formed steel section is formed into the first groove on the outside of the second cold-formed steel section by forging.

[0014] Optionally, in the above-mentioned reusable cold-formed steel composite section member, the cold-formed steel section includes a web and flanges disposed at both ends of the web;

[0015] The first protrusion is provided on the web and flange of the first cold-formed steel section respectively;

[0016] The first groove is provided on the flange of the second cold-formed steel section, and the first protrusion is provided on the web of the second cold-formed steel section.

[0017] Optionally, in the above-mentioned reusable cold-formed steel composite section members, the cross-sectional shape of the interlocking structure is a dovetail shape or an Ω shape; and / or,

[0018] The cold-formed steel section is either C-shaped or U-shaped.

[0019] Optionally, in the above-mentioned reusable cold-formed steel composite section member, the interlocking structure is provided through the length of the member body.

[0020] A connector for connecting two adjacent reusable cold-formed steel composite section members as described in any of the preceding claims, characterized in that the member body is provided with a first connecting portion for connecting the connector, the connector is a closed cavity structure, and the connector includes a second connecting portion that mates with the first connecting portion of the member body, the connector being sleeved on the outside of the member body.

[0021] Optionally, in the above-described connector, the first connecting portion includes a second groove disposed on the component body, and the second connecting portion includes a second protrusion disposed on the inner wall of the cavity of the connector. The second groove of the component body cooperates with the second protrusion of the connector to facilitate the installation and positioning of the component body and the connector.

[0022] Optionally, in the above-mentioned connector, a first mounting hole is provided at the end of the component body, and a second mounting hole that mates with the first mounting hole is provided on the side wall of the connector. The first mounting hole of the component body and the second mounting hole of the connector are connected and fixed by fasteners.

[0023] The reusable cold-formed steel composite section member provided by the present invention connects at least two cold-formed steel sections through an interlocking structure to lock the two cold-formed steel sections and prevent them from separating from each other, thereby forming a closed cavity structure and improving the mechanical properties of the cold-formed steel composite section member.

[0024] Compared with existing technologies, the reusable cold-formed steel composite section member provided by this invention uses an interlocking structure to lock two cold-formed steel sections, preventing them from separating and thus achieving a fixed connection between the two sections. Compared with traditional welding, bolt, or screw connections, this avoids residual stress and deformation generated during welding, improving the strength and stability of the component section. Furthermore, it eliminates the need for through holes in the cold-formed steel sections, avoiding stress concentration and weakening of the component's cross-sectional strength, thereby improving the mechanical properties of the cold-formed steel composite section member. In addition, the interlocking structure makes the assembly and disassembly of the cold-formed steel composite section member more convenient, ensuring its reusability and improving its recyclability.

[0025] The technical features mentioned above, those to be mentioned below, and those shown individually in the accompanying drawings can be combined arbitrarily, provided that the combined technical features are not contradictory. All feasible combinations of features are the technical content explicitly described herein. Any one of the multiple sub-features contained in the same statement can be applied independently, without necessarily being applied together with other sub-features. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a structural schematic diagram of a cold-formed steel composite section member provided in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the first cold-formed steel section provided in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the second cold-formed steel section provided in an embodiment of the present invention;

[0030] Figure 4 This is an exploded view of the assembly of the connectors and components provided in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the connector provided in an embodiment of the present invention.

[0032] Among them, 100 is the component body, 101 is the interlocking structure, 1011 is the first protrusion, 1012 is the first groove, 102 is the first cold-formed steel section, 103 is the second cold-formed steel section, 104 is the opening, 105 is the web, 106 is the wing plate, 107 is the first connecting part, 1071 is the second groove, and 108 is the first mounting hole;

[0033] 200 is a connector, 201 is a second connecting part, 2011 is a second protrusion, 202 is a second mounting hole, and 203 is a fastener;

[0034] 300 is a steel beam. Detailed Implementation

[0035] The core of this invention is to provide a reusable cold-formed steel composite section member, so as to improve the mechanical properties of the cold-formed steel composite section member while ensuring its reusability.

[0036] Another core aspect of this invention is to provide a connector for connecting the aforementioned reusable cold-formed steel composite section members.

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0038] like Figures 1 to 3 As shown, this embodiment of the invention discloses a reusable cold-formed steel composite section member, including a member body 100. It should be noted that cold-formed steel members are steel materials with a specific cross-sectional shape manufactured through a cold working process and are widely used in building structures. In residential construction, cold-formed steel members can be used as primary load-bearing components, such as steel frames, trusses, beams, and columns, and are also suitable for secondary components and enclosure structures, such as roof purlins, wall frame beams and columns, joists, doors and windows, as well as roof panels, wall panels, and floor slabs. Traditional cold-formed steel members are typically manufactured using single-symmetric or point-symmetric open sections with relatively low torsional stiffness, such as Z-shaped and C-shaped sections, making them susceptible to torsional buckling. However, an effective method to improve the load-bearing capacity and torsional stability of traditional cold-formed steel members is to combine two or more separate sections into a closed or double-symmetric open section.

[0039] Traditional cold-formed steel composite section members typically connect two or more separate sections by welding, bolting, or screwing to form a closed or double-symmetrical open section. However, welding connections generate significant residual stress and deformation, leading to reduced strength and stability of the section and hindering dismantling, making the cold-formed steel composite section members unusable and lacking recyclability. Similarly, holes for bolts or screws in the section cause stress concentration and weaken the section strength. Furthermore, with prolonged use, bolts or screws are prone to loosening due to vibration or insufficient tightening, requiring regular inspection and maintenance. Moreover, repeated use of bolts or screws causes the holes in the section to enlarge, further weakening the section strength and reducing the load-bearing capacity and torsional stability of the cold-formed steel composite section member.

[0040] The reusable cold-formed steel composite section member disclosed in this invention uses an interlocking structure 101 to lock two cold-formed steel sections together, preventing them from separating and thus achieving a fixed connection. Compared to traditional welding, bolt, or screw connections, this avoids residual stress and deformation generated during welding, improving the strength and stability of the component section. Furthermore, it eliminates the need for through holes in the cold-formed steel sections, avoiding stress concentration and weakening of the component's cross-sectional strength, thereby improving the mechanical properties of the cold-formed steel composite section member. In addition, the interlocking structure 101 makes the assembly and disassembly of the cold-formed steel composite section member more convenient, ensuring its reusability and improving its recyclability.

[0041] It should be noted that the reusable cold-formed steel composite section members disclosed in the embodiments of the present invention can be used for main load-bearing components such as beams and columns, as well as secondary components and enclosure structures such as roof purlins, joists, doors and windows. The following will be combined with... Figures 1 to 3 This will be explained and illustrated using cold-formed steel composite section members as an example when used in load-bearing columns.

[0042] Among them, such as Figure 1As shown, the component body 100 includes at least two cold-formed steel sections. When there are two cold-formed steel sections, the two cold-formed steel sections are connected by an interlocking structure 101 to lock the movement of the two cold-formed steel sections in the transverse direction of the component body 100. This prevents the two cold-formed steel sections from separating from each other, thereby forming a closed cavity structure, which in turn improves the load-bearing capacity and torsional stability of the cold-formed steel spliced ​​section component. By employing an interlocking structure 101 to lock the two cold-formed steel sections in the transverse direction of the component body 100, the two cold-formed steel sections are prevented from separating from each other, thereby achieving the connection and fixation of the two cold-formed steel sections. Compared with the traditional connection methods using welding, bolts, or screws, this avoids residual stress and deformation generated during welding, improves the strength and stability of the component section, and eliminates the need for through holes in the cold-formed steel sections, avoiding stress concentration and weakening of the component's section strength. This further improves the mechanical properties of the cold-formed steel composite section component. In addition, the connection and fixation of the two cold-formed steel sections through the interlocking structure 101 makes the assembly and disassembly of the cold-formed steel composite section component more convenient, ensuring that the cold-formed steel composite section component is reusable and improving recyclability. It should be noted that the number of cold-formed steel sections can be two, three, four, or more, and multiple cold-formed steel sections can be assembled in parallel, that is, multiple cold-formed steel sections are connected sequentially through interlocking structure 101 to form a large-sized cold-formed steel section member with multiple closed cavity structures. Alternatively, multiple cold-formed steel sections can be assembled in a nested manner, that is, multiple cold-formed steel sections are connected sequentially through interlocking structure 101 to form a cold-formed steel section member with a single closed cavity structure and greater stiffness and strength.

[0043] It should be noted that when cold-formed steel composite section members are used in load-bearing beams, the two cold-formed steel sections are connected by an interlocking structure 101 to lock the two cold-formed steel sections from moving in the vertical direction of the member body 100. This prevents the two cold-formed steel sections from separating from each other, thereby forming a closed cavity structure, which in turn improves the load-bearing capacity and torsional stability of the cold-formed steel composite section members.

[0044] Furthermore, such as Figure 2 and Figure 3As shown, the cold-formed steel section can be C-shaped or U-shaped, and the cold-formed steel section has an opening 104. When there are two cold-formed steel sections, the openings 104 of the two cold-formed steel sections are nested relative to each other to form a closed cavity structure. Specifically, the cold-formed steel section includes a web 105 and flanges 106 disposed at both ends of the web 105, so that an opening 104 is formed between the two flanges 106. When the two cold-formed steel sections are assembled, the webs 105 of the two cold-formed steel sections are arranged opposite each other, and the flanges 106 on the corresponding sides of the two cold-formed steel sections are pressed together and connected and fixed by an interlocking structure 101 to prevent the two cold-formed steel sections from separating from each other. It should be noted that, in order for the two cold-formed steel sections to form a closed cavity structure through nesting, the opening width of the opening 104 of one cold-formed steel section should be smaller than the opening width of the opening 104 of the other cold-formed steel section. In order to ensure that the flanges 106 on the corresponding sides of the two cold-formed steel sections are tightly attached, the difference in opening width of the openings 104 of the two cold-formed steel sections should be equal to the total thickness of the flange 106 of the cold-formed steel section with the smaller opening width, that is, the sum of the thicknesses of the two flanges 106 of the cold-formed steel section with the smaller opening width.

[0045] Furthermore, such as Figures 1 to 3As shown, in a specific embodiment, the component body 100 includes two cold-formed steel sections. For ease of understanding, the two cold-formed steel sections are defined as a first cold-formed steel section 102 and a second cold-formed steel section 103, respectively. The interlocking structure 101 includes a first protrusion 1011 disposed on the first cold-formed steel section 102 and protruding inwards from it, and a first groove 1012 disposed on the second cold-formed steel section 103 and formed on the outer side of it. The first groove 1012 corresponds to the first protrusion 1011, and the first protrusion 1011 is inserted into the first groove 1012. The width of the first groove 1012 gradually decreases from the bottom to the opening to prevent the first protrusion 1011 from detaching from the first groove 1012. Specifically, the sidewall of the first cold-formed steel section 102 is formed into a first protrusion 1011 by stamping inward, and the sidewall of the second cold-formed steel section 103 is formed into a first groove 1012 on the outside of the second cold-formed steel section 103 by stamping inward. The first protrusion 1011 has a large end and a small end, and the width of the first groove 1012 gradually decreases from the bottom to the opening. Simultaneously, the opening width of the first groove 1012 is smaller than the width of the large end of the first protrusion 1011 to prevent the first protrusion 1011 from detaching from the first groove 1012, thereby achieving interlocking between the first cold-formed steel section 102 and the second cold-formed steel section 103. Alternatively, the first protrusion 1011 of the first cold-formed steel section 102 can also be formed by forging, and the first groove 1012 of the second cold-formed steel section 103 can also be formed on the outside of the second cold-formed steel section 103 by forging.

[0046] In this embodiment, the interlocking structure 101 adopts a dovetail or Ω-shaped cross-section, that is, the first protrusion 1011 and the first groove 1012 can adopt similar dovetail shapes, such as... Figure 2 and Figure 3 As shown, the size of the first groove 1012 is larger than the size of the first protrusion 1011, so that when the second cold-formed steel section 103 is inserted into the first cold-formed steel section 102 from the end of the first cold-formed steel section 102, the first protrusion 1011 can be inserted into the corresponding first groove 1012. Simultaneously, the inner wall of the first groove 1012 is kept close to the outer wall of the first protrusion 1011, preventing the first cold-formed steel section 102 and the second cold-formed steel section 103 from separating, thus forming a closed cavity structure. Furthermore, when the first cold-formed steel section 102 and the second cold-formed steel section 103 are nested to form the closed cavity structure of the component body 100, the first protrusion 1011 and the first groove 1012 sleeved on the outside of the first protrusion 1011 can act as reinforcing ribs of the component body 100, improving the strength and rigidity of the component body 100, thereby improving the load-bearing capacity and torsional stability of the cold-formed steel section component. Figure 1 As shown. Of course, the first protrusion 1011 and the first groove 1012 can also be Ω-shaped, and the specific implementation is the same as the above embodiment, which will not be repeated here.

[0047] Furthermore, to ensure the stability of the connection and fixation of the two cold-formed steel sections, the interlocking structure 101 is provided through the length of the component body 100. That is, the first protrusion 1011 is provided through the length of the first cold-formed steel section 102, and the first groove 1012 is provided through the length of the second cold-formed steel section 103. This ensures that the two cold-formed steel sections are reliably connected along their entire length, thereby guaranteeing the stability of the connection and fixation of the two cold-formed steel sections. Moreover, the first protrusion 1011 is provided on the flange 106 of the first cold-formed steel section 102, and the first groove 1012 is provided on the flange 106 of the second cold-formed steel section 103. The locking of the two cold-formed steel sections is achieved through the cooperation of the first protrusion 1011 on the flange 106 of the first cold-formed steel section 102 and the first groove 1012 on the flange 106 of the second cold-formed steel section 103. Meanwhile, a first protrusion 1011 is also provided on the web 105 of the first cold-formed steel section 102 and the web 105 of the second cold-formed steel section 103, thereby improving the stiffness and strength of the web 105 of the first cold-formed steel section 102 and the second cold-formed steel section 103, and further improving the buckling resistance of the cold-formed steel spliced ​​section member.

[0048] like Figure 4 and Figure 5 As shown, the present invention also discloses a connector 200, wherein the connector 200 is used to connect two adjacent cold-formed steel composite section members. The cold-formed steel composite section member is a reusable cold-formed steel composite section member disclosed in the above embodiment, and therefore has all the technical effects of the above reusable cold-formed steel composite section member, which will not be repeated here.

[0049] Furthermore, such as Figure 1 and Figure 4As shown, the component body 100 is provided with a first connecting portion 107 for connecting the connector 200. The connector 200 includes a second connecting portion 201 that mates with the first connecting portion 107 of the component body 100, and the connector 200 has a closed cavity structure, which is sleeved on the outside of the component body 100. Specifically, by aligning the first connecting portions 107 on the two component bodies 100 with the second connecting portions 201 of the connector 200, the two component bodies 100 and the connector 200 are positioned and installed, and the connecting ends of the two component bodies 100 are inserted into the cavity of the connector 200. At this time, the two component bodies 100 can be fixed to the connector 200 by welding or by a detachable connection, thereby realizing the connection of two adjacent cold-formed steel composite section components.

[0050] Furthermore, such as Figure 1 and Figure 4 As shown, in a specific embodiment, the first connecting portion 107 includes a second groove 1071 disposed on the component body 100, and the second connecting portion 201 includes a second protrusion 2011 disposed on the inner wall of the cavity of the connector 200. The second groove 1071 of the component body 100 and the second protrusion 2011 of the connector 200 cooperate to facilitate the installation and positioning of the component body 100 and the connector 200. Specifically, the second groove 1071 is formed by the first protrusion 1011 on the component body 100 protruding towards the inner side of the cavity, and the second protrusion 2011 is fixed to the inner wall of the cavity of the connector 200 by welding. By inserting the second protrusion 2011 of the connector 200 into the second groove 1071 of the component body 100, the installation and positioning of the two component bodies 100 and the connector 200 are achieved. In this embodiment, the second protrusion 2011 adopts a dovetail shape or an Ω shape similar to the shape of the second groove 1071, such as... Figure 5 As shown, the size of the second groove 1071 is larger than the size of the second protrusion 2011, so that when the connecting end of the component body 100 is inserted into the cavity of the connector 200, the second protrusion 2011 can be inserted into the second groove 1071, while ensuring that the outer wall of the second protrusion 2011 is in close contact with the inner wall of the second groove 1071, thereby realizing the installation and positioning of the two component bodies 100 and the connector 200, and ensuring the stability of the connection between the component body 100 and the connector 200.

[0051] Furthermore, to ensure the reusability of the cold-formed steel composite section members and improve their recyclability, the member body 100 and the connector 200 are detachably connected. In one specific embodiment, as... Figure 4 and Figure 5As shown, a first mounting hole 108 is provided at the end of the component body 100, and a second mounting hole 202 that mates with the first mounting hole 108 is provided on the side wall of the connector 200. The first mounting hole 108 of the component body 100 and the second mounting hole 202 of the connector 200 are connected and fixed by fasteners 203. In this embodiment, a plurality of first mounting holes 108 are provided on each side wall of the component body 100, and each first mounting hole 108 is respectively provided on both sides of the second groove 1071. At the same time, a plurality of second mounting holes 202 are provided on each side wall of the connector 200, and each second mounting hole 202 is respectively provided on both sides of the second protrusion 2011. This ensures that when the connecting end of the component body 100 is inserted into the cavity of the connector 200, the connection between the component body 100 and the connector 200 is more secure and reliable by increasing the number of fasteners 203. Of course, the number of second mounting holes 202 can also be greater than the number of first mounting holes 108. That is, the number of second mounting holes 202 arranged along the height direction of the connector 200 is greater than the number of first mounting holes 108 arranged along the height direction of the component body 100. This allows for adjustment of the height of the load-bearing column by adjusting the positions of the first mounting holes 108 and the second mounting holes 202. Simultaneously, the steel beam 300 can be connected to the second mounting holes 202 on the side wall of the connector 200 via fasteners 203, thereby achieving the purpose of connecting and fixing the connector 200 to different components. It should be noted that since the first mounting holes 108 are located inside the cavity of the connector 200, while the steel beam 300 is connected to the outside of the connector 200, the connection between the component body 100, the steel beam 300, and the connector 200 can use a shared fastener 203, thereby reducing the number of fasteners 203 used and lowering costs. Among them, the fastener 203 can be a high-strength bolt to avoid shear failure of the fastener 203 and ensure the reliability of the connection between the component body 100, the steel beam 300 and the connector 200.

[0052] It should be noted that in the above embodiments, the cross-section of the component body 100 is square, and the cross-section of the connector 200 is also square, which is similar in shape to the component body 100. A first protrusion 1011 is provided on each side wall of the component body 100 to improve the buckling resistance of the component body 100. A second protrusion 2011 is provided on each side wall of the connector 200. The second groove 1071 formed at the position of the first protrusion 1011 cooperates with the second protrusion 2011 of the connector 200 to achieve the purpose of connecting the component body 100 and the connector 200. Of course, the number of first protrusions 1011 provided on each side wall of the component body 100 is not limited to one; it can also be two or three to improve the rigidity and strength of the component body 100. Simultaneously, the number of second protrusions 2011 provided on each side wall of the connector 200 can be equal to, or less than, the number of second grooves 1071 formed at the positions of the first protrusions 1011. Furthermore, the cross-section of the component body 100 is not limited to square; it can also be rectangular or circular. When the cross-section of the component body 100 is circular, the first protrusions 1011 can be distributed circumferentially along the side walls of the component body 100. At the same time, the cross-section of the connector 200 also adopts a circular shape similar to that of the component body 100, and the second protrusions 2011 can be distributed circumferentially along the side walls of the connector 200.

[0053] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A reusable cold-formed steel composite section member, characterized in that, include: The component body (100) includes at least two cold-formed steel sections, and the two cold-formed steel sections are connected by an interlocking structure (101) to form a closed cavity structure. The interlocking structure (101) is used to lock the two cold-formed steel sections to prevent the two cold-formed steel sections from separating from each other.

2. The reusable cold-formed steel composite section member according to claim 1, characterized in that, The cold-formed steel section has an opening (104), and there are two cold-formed steel sections, with the openings (104) of the two cold-formed steel sections nested relative to each other.

3. The reusable cold-formed steel composite section member according to claim 2, characterized in that, The component body (100) includes a first cold-formed steel section (102) and a second cold-formed steel section (103). The interlocking structure (101) includes a first protrusion (1011) disposed on the first cold-formed steel section (102) and protruding to the inside of the first cold-formed steel section (102), and a first groove (1012) disposed on the second cold-formed steel section (103) and formed on the outside of the cold-formed steel section. The first groove (1012) is correspondingly disposed to the first protrusion (1011). The first protrusion (1011) is inserted into the first groove (1012), and the width of the first groove (1012) gradually decreases from the bottom of the groove to the opening of the groove to prevent the first protrusion (1011) from detaching from the first groove (1012).

4. The reusable cold-formed steel composite section member according to claim 3, characterized in that, The first protrusion (1011) is formed on the sidewall of the first cold-formed steel section (102) by stamping inward, and the first groove (1012) is formed on the outside of the second cold-formed steel section (103) by stamping inward; or, The first cold-formed steel section (102) is formed by forging to form the first protrusion (1011), and the second cold-formed steel section (103) is formed by forging to form the first groove (1012) on the outside of the second cold-formed steel section (103).

5. The reusable cold-formed steel composite section member according to claim 4, characterized in that, The cold-formed steel section includes a web (105) and flanges (106) disposed at both ends of the web (105); The first protrusion (1011) is provided on the web (105) and flange (106) of the first cold-formed steel section (102); The first groove (1012) is provided on the flange (106) of the second cold-formed steel section (103), and the first protrusion (1011) is provided on the web (105) of the second cold-formed steel section (103).

6. The reusable cold-formed steel composite section member according to claim 1, characterized in that, The interlocking structure (101) has a dovetail or Ω-shaped cross-section; and / or, The cold-formed steel section is either C-shaped or U-shaped.

7. The reusable cold-formed steel composite section member according to any one of claims 1 to 6, characterized in that, The interlocking structure (101) is provided through the length of the component body (100).

8. A connector (200) for connecting two adjacent reusable cold-formed steel composite section members as described in any one of claims 1 to 7, characterized in that, The component body (100) is provided with a first connecting part (107) for connecting the connector (200). The connector (200) is a closed cavity structure, and the connector (200) includes a second connecting part (201) that cooperates with the first connecting part (107) of the component body (100). The connector (200) is sleeved on the outside of the component body (100).

9. The connector according to claim 8, characterized in that, The first connecting part (107) includes a second groove (1071) disposed on the component body (100), and the second connecting part (201) includes a second protrusion (2011) disposed on the inner wall of the cavity of the connector (200). The second groove (1071) of the component body (100) cooperates with the second protrusion (2011) of the connector (200) so as to install and position the component body (100) and the connector (200).

10. The connector according to claim 8, characterized in that, The end of the component body (100) is provided with a first mounting hole (108), and the side wall of the connector (200) is provided with a second mounting hole (202) that mates with the first mounting hole (108). The first mounting hole (108) of the component body (100) and the second mounting hole (202) of the connector (200) are connected and fixed by fasteners (203).

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