H-shaped chord member and manufacturing method thereof

Abstract

The invention belongs to the technical field of steel trussed girders, and particularly relates to an H-shaped chord member and a manufacturing method thereof.The H-shaped chord member comprises H-shaped steel, an upper wing plate, a lower wing plate and a web plate; each connecting structure comprises a width connecting plate, a gusset plate and a plurality of stiffening plates; an upper backing plate; a lower backing plate; and a plurality of reinforcing plates. The H-shaped steel is adopted as the main body structure of the chord member, the steel consumption can be greatly reduced on the premise that the structural strength is guaranteed, the material cost is reduced, welding is not needed, the construction process can be simplified, the construction period can be shortened, and the production cost is reduced; and the specification of the used H-shaped steel can be reduced, the overall weight of the chord member is reduced, the steel consumption is reduced, the material cost is further reduced, and the distance between the gusset plates can meet the design requirement.

Description

Technical Field

[0001] The invention belongs to the technical field of steel truss girders, and particularly relates to an H-shaped chord member and a manufacturing method thereof. Background Art

[0002] Steel truss girder structures are widely used in fields such as bridges and buildings due to their high load-bearing capacity and spanning ability; among them, the steel truss girder chord member, as a key load-bearing component of the steel truss girder structure, its structural form and connection method directly affect the overall performance of the bridge structure.

[0003] Currently, the steel truss girder chord members mostly adopt box-shaped structures, and the connection with the web members is realized through integral joint structures. The chord member body and the joint area are usually manufactured by full welding processes. The connection between the chord members mainly relies on high-strength bolt connection, welding connection, or bolt-welding combined connection methods.

[0004] However, the existing steel truss girder chord members have problems such as large consumption of structural steel, complex construction processes, high manufacturing costs, and long construction periods, and cannot meet the actual application requirements. Summary of the Invention

[0005] The purpose of the invention is to provide an H-shaped chord member and a manufacturing method thereof, which solve the technical problems of large consumption of structural steel, complex construction processes, high manufacturing costs, and long construction periods existing in the prior art.

[0006] In a first aspect, the invention discloses an H-shaped chord member, comprising: An H-shaped steel, including an upper flange, a lower flange, and a web; Two connection structures, symmetrically arranged on both sides of the H-shaped steel; each of the connection structures includes: A width extension plate, arranged at the edge of the upper flange along the width direction and flush with the upper flange; A gusset plate, vertically arranged on the top surface of the width extension plate, and the two gusset plates are parallel to each other; Multiple stiffening plates, vertically arranged on the bottom surface of the width extension plate, and spaced along the axial direction of the H-shaped steel, and the stiffening plates extend towards the inside of the H-shaped steel, and their extension ends are respectively fixedly connected to the upper flange, the lower flange, and the web; An upper backing plate, fittingly arranged on the top surface of the upper flange; A lower backing plate, fittingly arranged on the bottom surface of the lower flange; Several reinforcing plates, arranged between the two gusset plates and fixedly connected to the upper backing plate.

[0007] This application uses H-shaped steel as the main structure of the chord members, which can significantly reduce the steel consumption while ensuring the structural strength, reducing the material cost. Moreover, it does not require welding, thus simplifying the construction process, shortening the construction period, and reducing the production cost. By setting width-expanding plates on both sides of the upper flange, the specification of the H-shaped steel used can be reduced, the overall weight of the chord members can be lightened, the steel consumption can be saved, the material cost can be further reduced, and the spacing of the gusset plates can be ensured to meet the design requirements.

[0008] Based on the above technical solutions, the solution of this application can be further improved as follows: Preferably, both sides of the lower backing plate in the width direction extend beyond the edges of the lower flange, and both sides in the length direction are flush with the lower flange; adopting this solution, a straight weld seam is formed, improving the welding portability and connection reliability, enabling them to be stressed synergistically and deform synchronously, thereby enhancing the longitudinal overall load-bearing capacity, and also enabling the chord members to be closely butted, thus improving the connection stability.

[0009] Preferably, the stiffening plate extends downward to form a convex block, the convex block is connected to the top surface of the lower backing plate and is spaced from the lower flange; adopting this solution, the stress transmission path is optimized, the local stress concentration is reduced, the overall stability of the chord members is improved, and the right-angle welding area is avoided, thereby ensuring the welding effect of the lower backing plate and the lower flange.

[0010] Preferably, both sides of the upper backing plate in the width direction extend beyond the edges of the upper flange, and both sides in the length direction are flush with the upper flange; and both sides of the upper backing plate in the width direction are provided with mounting grooves, and the gusset plates are arranged in one-to-one correspondence in the mounting grooves; adopting this solution, a straight weld seam is formed, improving the welding portability and connection reliability, enabling them to be stressed synergistically and deform synchronously, thereby enhancing the longitudinal overall load-bearing capacity, and also enabling the chord members to be closely butted, thus improving the connection stability, and forming an avoidance for the gusset plates to avoid structural interference.

[0011] Preferably, the spacing between the two mounting grooves is less than the width of the upper flange; adopting this solution, a groove-shaped welding area is formed, thereby providing a stable and regular welding interface, improving the welding portability and connection reliability, and also providing an avoidance space for the welding of the gusset plates and the width-expanding plates to avoid welding difficulties and quality problems due to narrow space.

[0012] Preferably, both sides of the mounting groove are spaced from the adjacent gusset plate and are located on both sides of the top surface of the adjacent width-expanding plate in the length direction; adopting this solution, a straight weld seam is formed, enabling the two ends of the width-expanding plate to be firmly welded to the upper backing plate, thereby optimizing the stress transmission path, reducing the local stress concentration, and improving the overall stability of the chord members.

[0013] Preferably, a plurality of first bolt holes are formed at both ends of the upper wing plate, a plurality of second bolt holes are formed at both ends of the lower wing plate, and a plurality of third bolt holes are formed at both ends of the web plate; A plurality of fourth bolt holes corresponding to the first bolt holes are formed at both ends of the upper backing plate, and a plurality of fifth bolt holes corresponding to the second bolt holes are formed at both ends of the lower backing plate; a plurality of sixth bolt holes are provided at one end of the gusset plate away from the width extension plate; With this solution, the connection stability between the chord members and between the chord members and the web members is ensured, the on-site construction difficulty is reduced, the construction efficiency is improved, and the connection accuracy is enhanced.

[0014] Preferably, the stiffening plate has a rectangular structure, and avoiding notches are provided at two corners close to the web plate; With this solution, the connection stability is improved, the stress concentration is reduced, and interference with the arc-shaped corners inside the H-shaped steel is avoided, thereby improving the installation accuracy.

[0015] Preferably, one end of the gusset plate away from the width extension plate is in an isosceles trapezoid or semi-circular shape; With this solution, under the premise of ensuring the connection strength, the steel consumption can be reduced, and the material cost can be lowered.

[0016] In a second aspect, the present invention discloses a manufacturing method for an H-shaped chord member, including the following steps: S1. First, lay the H-shaped steel flat on the jig, then draw the assembly position line of the width extension plate on the H-shaped steel, assemble the width extension plate according to the assembly position line, and use CO2 gas shielded welding to weld the butt weld of the upper wing plate and the width extension plate in the flat position. After welding, conduct weld quality inspection; S2. Flip the H-shaped steel by 90°, then draw the assembly position line of the stiffening plate on one side of the H-shaped steel, assemble the stiffening plate according to the assembly position line, use CO2 gas shielded welding to weld the welds of the stiffening plate with the upper wing plate and the lower wing plate in the vertical position, and use CO2 gas shielded welding to weld the welds of the stiffening plate with the web plate in the flat position. After welding, conduct weld quality inspection; S3. Flip the H-shaped steel by 180°, draw the assembly position line of the stiffening plate on the other side of the H-shaped steel, assemble the stiffening plate according to the assembly position line, use CO2 gas shielded welding to weld the welds of the stiffening plate with the upper wing plate and the lower wing plate in the vertical position, and use CO2 gas shielded welding to weld the welds of the stiffening plate with the web plate in the flat position. After welding, conduct weld quality inspection; S4. Flip the H-shaped steel by 90°, draw the assembly position line of the lower backing plate on the lower wing plate, assemble the lower backing plate according to the assembly position line, and use CO2 gas shielded welding for positioning welding; S5. Flip the H-beam 180°, mark the assembly position line of the backing plate on the upper flange, assemble the upper backing plate according to the assembly position line, carry out positioning welding using CO2 gas shielded welding, and then weld the weld seam between the upper backing plate and the upper flange at the gusset plate position in the flat position. After welding is completed, conduct weld quality inspection; S6. Weld the weld seam between the lower backing plate and the lower flange in the flat position using CO2 gas shielded welding. After welding is completed, conduct weld quality inspection; S7. Flip the H-beam 180°, weld the weld seam between the upper backing plate and the upper flange outside the gusset plate in the flat position using CO2 gas shielded welding. After welding is completed, conduct weld quality inspection; S8. Flip the H-beam 180°, mark the assembly position lines of the gusset plate and the stiffening plate on the H-beam, assemble the gusset plate and the stiffening plate according to the assembly position lines, weld the weld seam between the stiffening plate and the gusset plate in the vertical position using CO2 gas shielded welding, then weld the weld seam between the stiffening plate and the upper backing plate in the flat position, and then weld the weld seam between the gusset plate and the upper flange in the flat position. After welding is completed, conduct weld quality inspection; S9. Trim the welding deformation of the chord, and adjust the flatness ≤ 1 mm / m; S10. Mark the drilling alignment lines at both ends of the upper flange, lower flange and web on the scribing platform, and then mark the drilling alignment lines on the gusset plate; S11. Drill the hole groups on the upper flange, lower flange, web and gusset plate using a CNC drilling machine.

[0017] Through the above technical solutions, the present invention achieves the following beneficial effects: 1. This application uses an H-beam as the main structure of the chord. Compared with the main structure of the traditional box-shaped chord, it can significantly reduce the steel consumption while ensuring the structural strength, reducing the material cost; 2. By arranging width extension plates on both sides of the upper flange in this application, the specification of the H-beam used can be reduced, the overall weight of the chord can be reduced, thereby saving steel consumption, further reducing the material cost, and ensuring that the spacing of the gusset plates meets the design requirements; 3. By using an H-beam as the main structure of the chord in this application, compared with the manufacturing method of the traditional box-shaped chord that needs to first purchase steel plates and then weld them into a box shape, it does not require welding, thus simplifying the construction process, shortening the construction period, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of the H-shaped chord for the specific embodiment of the present invention; Figure 2 is Figure 1 Structural schematic diagram of the shown H-shaped chord; Figure 3 is Figure 1 Schematic diagram of the position of the bolt holes in the shown H-shaped chord; Figure 4 is Figure 1 Top view of the described H-shaped chord; Figure 5 is Figure 1 Side view of the described H-shaped chord; Explanation of the reference numerals: 1. H-shaped steel; 11. Upper flange; 1101. First bolt hole; 12. Lower flange; 1201. Second bolt hole; 13. Web; 1301. Third bolt hole; 2. Connection structure; 21. Width-expanding plate; 22. Gusset plate; 2201. Sixth bolt hole; 23. Stiffening plate; 231. Protrusion; 2301. Avoidance notch; 3. Upper backing plate; 301. Installation groove; 302. Fourth bolt hole; 4. Lower backing plate; 401. Fifth bolt hole; 5. Reinforcing plate. Specific embodiments

[0020] The following will describe in detail the embodiments of the technical solutions of the present invention in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0021] The terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features.

[0022] In this application, unless otherwise specified or limited, the terms "mounted" and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0023] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0024] Example 1: like Figures 1 to 5 As shown, this embodiment discloses an H-shaped chord, which is used as a key load-bearing component of a steel truss structure. It has the advantages of small steel consumption, simple construction process, low manufacturing cost and short construction period. Its specific structure includes: H-shaped steel 1, two connecting structures 2, an upper pad 3, a lower pad 4 and several reinforcing plates 5.

[0025] The H-shaped steel 1 includes an upper wing plate 11, a lower wing plate 12 and a web 13, and the upper wing plate 11 and the lower wing plate 11 are parallel and located on the upper and lower sides of the web 13 to form an H-shaped cross-section; it is the main load-bearing structure of the chord and has good bending resistance and structural stability.

[0026] The two connection structures 2 are symmetrically arranged on both sides of the H-shaped steel 1. This symmetrical arrangement ensures that the mechanical properties of both sides of the chord are balanced when subjected to force, thereby reducing deformation and stress concentration caused by uneven force.

[0027] like Figure 5 As shown, each connection structure 2 includes: The width connecting plate 21 is provided at the edge of the upper wing plate 11 along the width direction and is flush with the upper wing plate 11. It is used to increase the width of the upper wing plate 11 in this direction and provide sufficient space for the installation of the gusset plate 22. The gusset plate 22 is vertically arranged on the top surface of the width connecting plate 21, and the two gusset plates 22 are parallel to each other, and are used to provide a stable connection interface to facilitate reliable connection with the web member; A plurality of stiffening plates 23 are vertically arranged on the bottom surface of the width connecting plate 21 and are spaced apart along the axial direction of the H-shaped steel 1. The stiffening plates 23 extend toward the inner side of the H-shaped steel 1, and their extended ends are fixedly connected to the upper wing plate 11, the lower wing plate 12 and the web 13, respectively, to enhance the connection strength between the width connecting plate 21 and the H-shaped steel 1, thereby improving the rigidity and stability of the entire connection structure 2 and preventing deformation or damage when subjected to force.

[0028] It should be noted that the distance between the two gusset plates 22 needs to match the width of the web member. Therefore, by arranging the width extension plates 21 on both sides in the width direction of the upper flange 11, not only can the distance between the gusset plates 22 meet the design requirements, but also the gusset plates 22 can be stably connected, and the specification of the H-shaped steel 1 can be reduced, thereby reducing the overall weight of the chord member, saving the steel consumption, and reducing the manufacturing cost.

[0029] The upper backing plate 3 is attached to the top surface of the upper flange 11, thereby enhancing the structural strength of the upper flange 11, and thus improving the flexural strength, load-bearing capacity and stability of the chord member.

[0030] The lower backing plate 4 is attached to the bottom surface of the lower flange 12, thereby enhancing the structural strength of the lower flange 12, and thus improving the flexural strength, load-bearing capacity and stability of the chord member.

[0031] A plurality of reinforcing plates 5 are arranged between the two gusset plates 22 and are fixedly connected to the upper backing plate 3, and are used to connect the upper backing plate 3, the gusset plates 22 and the H-shaped steel 1 into a whole, so that they jointly bear the external load, and the flexural and shear resistance capabilities of the gusset plates 22 are improved.

[0032] The above technical solution has the following technical effects: First, using the H-shaped steel 1 as the main structure of the chord member, compared with the main structure of the traditional box-shaped chord member, the steel consumption can be greatly reduced on the premise of ensuring the structural strength, and the material cost is reduced; Second, using the H-shaped steel 1 as the main structure of the chord member, compared with the manufacturing method of the traditional box-shaped chord member that needs to first purchase steel plates and then weld them into a box shape, it does not need to be welded, so the construction process can be simplified, the construction period can be shortened, and the production cost can be reduced; Third, by arranging the width extension plates 21 on both sides of the upper flange 11, the specification of the used H-shaped steel 1 can be reduced, the overall weight of the chord member can be reduced, the steel consumption can be saved, the material cost can be further reduced, and the distance between the gusset plates 22 can be ensured to meet the design requirements.

[0033] In some embodiments, as Figure 1 and Figure 2 shown, the two sides of the lower backing plate 4 in the width direction extend beyond the edge of the lower flange 12, and the two sides in the length direction are flush with the lower flange 12.

[0034] By making the extension in the width direction form a straight weld, the welding portability and connection reliability are improved; by making the length direction flush, the two work together to bear the force and can deform synchronously, thereby enhancing the longitudinal overall load-bearing capacity, and also enabling the chord members to be closely butted, thus improving the connection stability.

[0035] On the basis of the above embodiments, as Figure 1 、 Figure 2 andFigure 5 As shown, the stiffening plate 23 extends downward to form a convex block 231. The convex block 231 is connected to the top surface of the lower backing plate 4 and is spaced apart from the lower flange 12.

[0036] Through the above settings, the stress transmission path is optimized, local stress concentration is reduced, the overall stability of the chord is improved, and the right-angle welding area is avoided, thus ensuring the welding effect of the lower backing plate 4 and the lower flange 12.

[0037] In some embodiments, as Figure 1 and Figure 2 shown, both sides of the upper backing plate 3 in the width direction extend beyond the edges of the upper flange 11, and both sides in the length direction are flush with the upper flange 11; and mounting grooves 301 are formed on both sides of the upper backing plate 3 in the width direction, and gusset plates 22 are arranged in one-to-one correspondence in the mounting grooves 301.

[0038] By making the width direction extend beyond, a straight weld seam is formed, improving welding portability and connection reliability; by making the length direction flush, the two work together under force and can deform synchronously, thereby enhancing the longitudinal overall load-bearing capacity and enabling the chords to be closely butted, thus improving the connection stability; by forming the mounting grooves 301, interference with the gusset plates 22 is avoided.

[0039] Based on the above embodiments, as Figure 1 and Figure 2 shown, the distance between the two mounting grooves 301 is less than the width of the upper flange 11.

[0040] Through the above settings, a groove-shaped welding area is formed between the inner side of the mounting groove 301 and the top surface of the upper flange 11, providing a stable and regular welding interface, improving welding portability and connection reliability, and also providing a clearance space for the welding of the gusset plate 22 and the width extension plate 21, avoiding welding difficulties and quality problems due to narrow space.

[0041] Based on the above embodiments, as Figure 2 and Figure 4 shown, both sides of the mounting groove 301 are spaced apart from the adjacent gusset plates 22 and are located on both sides of the top surface of the adjacent width extension plates 21 in the length direction.

[0042] Through the above settings, straight weld seams are formed between the inner side of the mounting groove 301 and the top surface of the width extension plate 21 and between both sides of the width extension plate 21 and the bottom surface of the upper backing plate 3, enabling both ends of the width extension plate 21 to be firmly welded to the upper backing plate 3, thereby optimizing the stress transmission path, reducing local stress concentration, and improving the overall stability of the chord.

[0043] In some embodiments, as Figure 3As shown, a plurality of first bolt holes 1101 are provided at both ends of the upper wing plate 11, a plurality of second bolt holes 1201 are provided at both ends of the lower wing plate 12, and a plurality of third bolt holes 1301 are provided at both ends of the web 13. Preferably, they are distributed in a rectangular array form, which can reduce stress concentration and improve the structural stability. However, it is not limited to this and no limitation is made; a plurality of fourth bolt holes 302 corresponding to the first bolt holes 1101 are provided at both ends of the upper backing plate 3, and a plurality of fifth bolt holes 401 corresponding to the second bolt holes 1201 are provided at both ends of the lower backing plate 4; a plurality of sixth bolt holes 2201 are provided at one end of the gusset plate 22 away from the width extension plate 21.

[0044] Through the above settings, the connection stability between the chord members and between the chord members and the web members is ensured, the on-site construction difficulty is reduced, the construction efficiency is improved, and the connection accuracy is enhanced.

[0045] In some embodiments, as Figure 5 shown, the stiffening plate 23 has a rectangular structure, and avoidance notches 2301 are provided at two corners close to the web 13.

[0046] Through the rectangular design, the stiffening plate 23 has the maximum contact area with the upper wing plate 11, the lower wing plate 12 and the web 13, thereby improving the connection stability and reducing stress concentration. By opening the avoidance notches 2301, interference with the arc-shaped corners inside the H-shaped steel 1 is avoided, and the installation accuracy is improved.

[0047] In some embodiments, as Figure 5 shown, one end of the gusset plate 22 away from the width extension plate 21 is in an isosceles trapezoid or semi-circular shape, which can reduce the steel consumption and lower the material cost on the premise of ensuring the connection strength.

[0048] The following is a further description of the present application: When connecting two adjacent chord members, first align the ends of the two chord members, then respectively arrange connecting plates on the top surface of the upper backing plate 3, the bottom surface of the lower backing plate 4, both sides of the bottom surface of the upper wing plate 11, both sides of the top surface of the lower wing plate 12 and both side surfaces of the web 13 in the butt joint area, and keep the bolt holes on each connecting plate aligned with the bolt holes at the ends of the chord members. Finally, connect and fix them with bolts and nuts.

[0049] When connecting the chord member and the web member, first insert the end of the web member between two gusset plates 22, then keep the bolt holes on both sides of the web member aligned with the corresponding bolt holes on the gusset plates 22, and finally connect and fix them with bolts and nuts.

[0050] Embodiment Two: This embodiment discloses a manufacturing method of an H-shaped chord member, including the following steps: S1. First, lay the H-beam 1 flat on the jig, then mark the assembly position line of the splicing plate 21 on the H-beam 1, assemble the splicing plate 21 according to the assembly position line, and use CO2 gas shielded welding to weld the butt weld of the upper wing plate 11 and the splicing plate 21 in the flat position. After welding, conduct weld quality inspection; S2. Flip the H-beam 1 by 90°, then mark the assembly position line of the stiffening plate 23 on one side of the H-beam 1, assemble the stiffening plate 23 according to the assembly position line, use CO2 gas shielded welding to weld the welds of the stiffening plate 23 with the upper wing plate 11 and the lower wing plate 12 in the vertical position, and use CO2 gas shielded welding to weld the weld of the stiffening plate 23 with the web 13 in the flat position. After welding, conduct weld quality inspection; S3. Flip the H-beam 1 by 180°, mark the assembly position line of the stiffening plate 23 on the other side of the H-beam 1, assemble the stiffening plate 23 according to the assembly position line, use CO2 gas shielded welding to weld the welds of the stiffening plate 23 with the upper wing plate 11 and the lower wing plate 12 in the vertical position, and use CO2 gas shielded welding to weld the weld of the stiffening plate 23 with the web 13 in the flat position. After welding, conduct weld quality inspection; S4. Flip the H-beam 1 by 90°, mark the assembly position line of the lower backing plate 4 on the lower wing plate 12, assemble the lower backing plate 4 according to the assembly position line, and use CO2 gas shielded welding for tack welding; S5. Flip the H-beam 1 by 180°, mark the assembly position line of the upper backing plate 3 on the upper wing plate 11, assemble the upper backing plate 3 according to the assembly position line, use CO2 gas shielded welding for tack welding, and then weld the weld of the upper backing plate 3 and the upper wing plate 11 at the position of the gusset plate 22 in the flat position. After welding, conduct weld quality inspection; S6. Use CO2 gas shielded welding to weld the weld of the lower backing plate 4 and the lower wing plate 12 in the flat position. After welding, conduct weld quality inspection; S7. Flip the H-beam 1 by 180°, use CO2 gas shielded welding to weld the weld of the upper backing plate 3 and the upper wing plate 11 outside the gusset plate 22 in the flat position. After welding, conduct weld quality inspection; S8. Flip the H-beam by 180°, mark the assembly position lines of the gusset plate 22 and the reinforcement plate 5 on the H-beam 1, assemble the gusset plate 22 and the reinforcement plate 5 according to the assembly position lines, use CO2 gas shielded welding to weld the weld of the reinforcement plate 5 and the gusset plate 22 in the vertical position, then weld the weld of the reinforcement plate 5 and the upper backing plate 3 in the flat position, and then weld the weld of the gusset plate 22 and the upper wing plate 11 in the flat position. After welding, conduct weld quality inspection; S9. Trim the welding deformation of the chord, and adjust the flatness ≤ 1 mm / m; S10. Mark the drilling alignment lines at both ends of the upper wing plate 11, the lower wing plate 12 and the web plate 13 on the scribing platform, and then mark the drilling alignment lines on the gusset plate 22. S11. Use a CNC drilling machine to drill the hole groups on the upper wing plate 11, the lower wing plate 12, the web plate 13 and the gusset plate 22.

[0051] This application uses a hot-rolled H-shaped steel as the main structure of the chord. It does not require welding and has a simple manufacturing method. Compared with the previous box-shaped chord structure, it can simplify the construction process and shorten the construction period.

[0052] In the description of this specification, a large number of specific details are set forth. However, it is understood that the embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0053] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the specification of the present invention.

Claims

1. An H-shaped chord member, characterized in that, Comprising: An H-shaped steel, including an upper flange, a lower flange and a web; Two connecting structures, symmetrically arranged on both sides of the H-shaped steel; Each of the connecting structures includes: A width-expanding plate, provided at the edge of the upper flange along the width direction and flush with the upper flange; A gusset plate, vertically provided on the top surface of the width-expanding plate, and the two gusset plates are parallel to each other; Multiple stiffening plates, vertically provided on the bottom surface of the width-expanding plate and spaced along the axial direction of the H-shaped steel, and the stiffening plates extend towards the inner side of the H-shaped steel, and their extended ends are respectively fixedly connected to the upper flange, the lower flange and the web; An upper backing plate, fittingly provided on the top surface of the upper flange; A lower backing plate, fittingly provided on the bottom surface of the lower flange; Several strengthening plates, provided between the two gusset plates and fixedly connected to the upper backing plate.

2. The H-shaped chord according to claim 1, characterized in that, The two sides of the lower backing plate along the width direction extend beyond the edges of the lower flange, and the two sides along the length direction are flush with the lower flange.

3. The H-shaped chord according to claim 2, characterized in that, The stiffening plate extends downward to form a convex block, and the convex block is connected to the top surface of the lower backing plate and is spaced from the lower flange.

4. The H-shaped chord according to claim 1, characterized in that, The two sides of the upper backing plate along the width direction extend beyond the edges of the upper flange, and the two sides along the length direction are flush with the upper flange; and installation grooves are provided on the two sides of the upper backing plate along the width direction, and the gusset plates are correspondingly arranged in the installation grooves one by one.

5. The H-shaped chord according to claim 4, wherein The distance between the two installation grooves is less than the width of the upper flange.

6. The H-shaped chord according to claim 4, characterized in that, The two sides of the installation groove are spaced from the adjacent gusset plate and are located on both sides of the top surface of the adjacent width-expanding plate along the length direction.

7. The H-shaped chord according to claim 1, characterized in that Multiple first bolt holes are provided at both ends of the upper flange, multiple second bolt holes are provided at both ends of the lower flange, and multiple third bolt holes are provided at both ends of the web; Fourth bolt holes corresponding to the first bolt holes are provided at both ends of the upper backing plate, and fifth bolt holes corresponding to the second bolt holes are provided at both ends of the lower backing plate; multiple sixth bolt holes are provided at one end of the gusset plate away from the width-expanding plate.

8. The H-shaped chord according to claim 1, characterized in that, The stiffening plate has a rectangular structure, and avoiding notches are provided at two corners close to the web.

9. The H-shaped chord according to claim 1, wherein One end of the gusset plate away from the width-expanding plate is in an isosceles trapezoid or semicircular shape.

10. A manufacturing method of an H-shaped chord, characterized in that, Including the following steps: S1. First, lay the H-shaped steel flat on the jig, then draw the assembly position line of the width-expanding plate on the H-shaped steel, assemble the width-expanding plate according to the assembly position line, and use CO2 gas shielded welding to weld the butt weld of the upper flange and the width-expanding plate in the flat position. After welding, check the weld quality; S2. Flip the H-shaped steel by 90°, then draw the assembly position line of the stiffening plate on one side of the H-shaped steel, assemble the stiffening plate according to the assembly position line, use CO2 gas shielded welding to weld the welds of the stiffening plate with the upper flange and the lower flange in the vertical position, and use CO2 gas shielded welding to weld the weld of the stiffening plate with the web in the flat position. After welding, check the weld quality; S3. Flip the H-beam by 180°, mark the assembly position lines of the stiffening plates on the other side of the H-beam, assemble the stiffening plates according to the assembly position lines, and use CO2 gas shielded welding to weld the seams between the stiffening plates and the upper and lower flange plates in the vertical position, and use CO2 gas shielded welding to weld the seams between the stiffening plates and the web plate in the flat position. After welding, conduct weld quality inspection; S4. Flip the H-beam by 90°, mark the assembly position lines of the lower backing plates on the lower flange plate, assemble the lower backing plates according to the assembly position lines, and use CO2 gas shielded welding for tack welding; S5. Flip the H-beam by 180°, mark the assembly position lines of the upper backing plates on the upper flange plate, assemble the upper backing plates according to the assembly position lines, use CO2 gas shielded welding for tack welding, and then weld the seams between the upper backing plates and the upper flange plates at the gusset plate position in the flat position. After welding, conduct weld quality inspection; S6. Use CO2 gas shielded welding to weld the seams between the lower backing plates and the lower flange plates in the flat position. After welding, conduct weld quality inspection; S7. Flip the H-beam by 180°, use CO2 gas shielded welding to weld the seams between the upper backing plates and the upper flange plates outside the gusset plate in the flat position. After welding, conduct weld quality inspection; S8. Flip the H-beam by 180°, mark the assembly position lines of the gusset plates and stiffening plates on the H-beam, assemble the gusset plates and stiffening plates according to the assembly position lines, use CO2 gas shielded welding to weld the seams between the stiffening plates and the gusset plates in the vertical position, then weld the seams between the stiffening plates and the upper backing plates in the flat position, and then weld the seams between the gusset plates and the upper flange plates in the flat position. After welding, conduct weld quality inspection; S9. Trim the welding deformation of the chord, and adjust the flatness ≤ 1 mm / m; S10. Mark the drilling alignment lines at both ends of the upper flange plate, lower flange plate and web plate on the scribing platform, and then mark the drilling alignment lines on the gusset plate; S11. Use a CNC drilling machine to drill the hole groups on the upper flange plate, lower flange plate, web plate and gusset plate.

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