Steel truss joint structure, ring gauge and construction assembly

Abstract

The application relates to a steel truss joint structure, a ring gauge and a construction assembly, the steel truss joint structure comprising: a top chord member and at least four chord splicing plates arranged on the top chord member, and a splicing joint arranged between the chord splicing plates; two connecting areas are arranged on both sides of the splicing joint, a plurality of connecting holes are arranged on the chord splicing plate of each connecting area, a preset number is arranged on each connecting hole, and the preset numbers form an arrangement spreading from the center of the splicing joint to the periphery in the four connecting areas. When the steel truss joint structure of an old bridge is reconstructed, high-strength bolts in the connecting holes are replaced by ring groove rivet connecting pairs according to the preset number sequence, so that the influence of uneven stress caused by the replacement sequence of the high-strength bolts is avoided, stress concentration is avoided, and the safety in the reconstruction of the old bridge is ensured and the work efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of steel structure bridge maintenance and renovation technology, and in particular to a steel truss node structure, ring gauge and construction components. Background Technology

[0002] High-strength bolts are commonly used for joint connections in steel bridge structures both domestically and internationally. Bridges are exposed to complex outdoor environments, making these fasteners susceptible to corrosion from rainwater and corrosive substances, thus affecting the bridge's lifespan. Furthermore, under continuous vibrations from vehicle loads, high-strength bolts are prone to loosening, fatigue, and even delayed fracture, posing safety hazards. To maintain operation, damaged bolts must be replaced regularly.

[0003] In related technologies, grooved rivet connections are used to replace the original high-strength bolts in the renovation of old bridges. However, when replacing complex steel truss nodes with multiple chord splice plates, the replacement sequence can easily lead to problems such as uneven stress distribution, deformation of the node plates, opening of splice joints, or residual stress concentration, threatening structural safety during construction and resulting in low construction efficiency. Utility Model Content

[0004] Therefore, it is necessary to provide a steel truss node structure, ring gauge and construction components to address the problems of uneven stress and stress concentration caused by the replacement sequence of ring groove rivets in the existing bridge reconstruction.

[0005] A steel truss node structure includes: an upper chord member and at least four chord splice plates disposed on the upper chord member, wherein splice seams are provided between the chord splice plates; two connection areas are provided on each side of the splice seam, and multiple connection holes are provided on the chord splice plate of each connection area, and each connection hole is provided with a preset number, wherein the preset number is arranged in a pattern that spreads outward from the center of the splice seam in the four connection areas.

[0006] In one embodiment, the value of the preset number gradually increases radially from the center of the seam outwards.

[0007] In one embodiment, it further includes a vertical web member and at least two diagonal web members, the two diagonal web members being obliquely connected below the upper chord member, and the vertical web member being vertically connected below the upper chord member and located between the two diagonal web members.

[0008] In one embodiment, the system further includes a vertical web member and at least two diagonal web members, the two diagonal web members being obliquely connected below the upper chord member, and the vertical web member being vertically connected below the upper chord member and located between the two diagonal web members.

[0009] In one embodiment, the diagonal web member includes at least four connection areas, the preset numbers of which gradually increase outward from the center of the connection node between the diagonal web member and the upper chord member.

[0010] In one embodiment, the vertical web member includes at least four connection areas, the preset numbers of which gradually increase outward from the center of the connection node between the vertical web member and the upper chord member.

[0011] In one embodiment, the connecting hole is used to install a grooved rivet connection pair.

[0012] In one embodiment, the connecting hole is an enlarged hole structure, and the diameter of the annular groove rivet connection pair is larger than the diameter of the connecting hole.

[0013] In one embodiment, the collar end of the annular groove rivet connection pair is provided with a deformable portion, which is fitted into the annular groove of the annular groove rivet.

[0014] When modifying the steel truss node structure of the old bridge, the high-strength bolts in the connecting holes are replaced with ring groove rivet assemblies in the order of the preset numbering to avoid uneven stress caused by the replacement sequence of high-strength bolts, avoid stress concentration, and thus ensure the safety of the old bridge renovation and improve work efficiency.

[0015] According to another objective of this utility model, a ring gauge is also provided, which is applied to the steel truss node structure as described above, comprising: the ring gauge is a cylindrical structure with an inner hole, the inner hole diameter of the ring gauge is adapted to the outer diameter of the collar of the ring groove rivet, and the cylindrical height of the ring gauge is adapted to the height of the collar of the ring groove rivet.

[0016] The aforementioned ring gauge is used to inspect the installation and replacement of ring groove rivets, ensuring installation quality, improving long-term reliability, and increasing inspection efficiency.

[0017] According to another objective of this utility model, a construction assembly is also provided, comprising the ring gauge as described above.

[0018] The aforementioned construction components involve disassembling high-strength bolts and installing ring groove rivets according to the preset numbering and replacement sequence on the node structure. The installation effect of the ring groove rivets is then checked using a ring gauge to ensure the safety of the bridge reconstruction and improve the overall quality and long-term reliability of the reconstruction. Attached Figure Description

[0019] Figure 1 This is a front view of the steel truss node structure.

[0020] Figure 2 This is a top view of the steel truss node structure.

[0021] Figure 3 This is a schematic diagram of the connection area of ​​the chord splice plate.

[0022] Figure 4 This is a schematic diagram of the connection area of ​​the diagonal web member.

[0023] Figure 5 This is a schematic diagram of the connection area of ​​the vertical web members.

[0024] In the diagram: 11. Top chord member; 12. Chord splice plate; 121. Splice joint; 122. Connecting hole; 13. Diagonal web member; 14. Vertical web member;

[0025] 21. First connecting region; 22. Second connecting region; 23. Third connecting region; 24. Fourth connecting region. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms 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 application and simplifying the description, and do not 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 application.

[0028] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0031] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0032] See Figure 1 , Figure 2 , Figure 1 This is a front view of a steel truss node structure in one embodiment of this application. Figure 2 This is a top view of a steel truss node structure in one embodiment of this application.

[0033] One embodiment of this application provides a steel truss node structure suitable for replacing high-strength bolts with ring groove rivets in the renovation of old bridges.

[0034] The steel truss node structure includes: an upper chord member 11 and at least four chord splice plates 12 disposed on the upper chord member 11, with splice seams 121 provided between the chord splice plates 12; two connection areas are provided on each side of the splice seam 121, and each chord splice plate 12 in the connection area is provided with multiple connection holes 122, each connection hole 122 is provided with a preset number, and the preset number is arranged in the four connection areas in a pattern that spreads outward from the center of the splice seam 121.

[0035] Four chord splice plates 12 are fixed to one end of the upper chord member 11 by high-strength bolts. Specifically, they include a first chord splice plate 12, a second chord splice plate 12, a third chord splice plate 12, and a fourth chord splice plate 12. A vertical splice seam 121 is formed between the four chord splice plates 12. Four connection areas are set with this splice seam 121 as the boundary, namely the first connection area 21, the second connection area 22, the third connection area 23, and the fourth connection area 24. Each chord splice plate 12 in each connection area is machined with multiple connection holes 122 for passing high-strength bolts.

[0036] All connecting holes 122 are numbered according to a preset numbering rule before manufacturing or modification. Furthermore, the numbering can be achieved through engraving, paint marking, or tagging. The preset numbering rule ensures that the numbers of all connecting holes 122 are arranged in the four connecting areas, spreading outwards from the center point of the splice seam 121.

[0037] When modifying the steel truss node structure of the old bridge, the high-strength bolts in the connecting holes 122 are replaced with ring groove rivet assemblies in the order of the preset numbering to avoid uneven stress caused by the bolt replacement sequence, avoid stress concentration, thereby ensuring the safety of the old bridge renovation and improving work efficiency.

[0038] like Figure 3 As shown, Figure 3 This is a schematic diagram of the connection area of ​​the chord splicing plate 12 in one embodiment of this application. In one embodiment, the value of the preset number gradually increases radially from the center of the splice seam 121 outwards.

[0039] Specifically, the numbering increments are a cross-regional, gradually increasing rotational replacement arrangement from the inside out. The lower left area of ​​the chord splicing plate 12 is defined as the first connecting area 21, the upper right area is defined as the second connecting area 22, the upper left area is defined as the third connecting area 23, and the lower right area is defined as the fourth connecting area 24.

[0040] First, the four connecting holes 122 closest to the center of the splice seam 121 are defined as the first sequence. The connecting hole 122 located in the first connecting area 21 is numbered 1, the connecting hole 122 located in the second connecting area 22 is numbered 2, the connecting hole 122 located in the third connecting area 23 is numbered 3, and the connecting hole 122 located in the fourth connecting area 24 is numbered 4.

[0041] Four connecting holes 122 located radially adjacent to the first sequence within four connecting regions are defined as the second sequence, and their rotational replacement order is the same as that of the first sequence. Specifically, the connecting hole 122 located near number 1 in the first connecting region 21 is numbered 5; the connecting hole 122 located near number 2 in the second connecting region 22 is numbered 6; the connecting hole 122 located near number 3 in the third connecting region 23 is numbered 7; and the connecting hole 122 located near number 4 in the fourth connecting region 24 is numbered 8. This continues, with the four connecting holes 122 with the highest numbers located at the outermost edges of the four connecting regions.

[0042] When construction workers disassemble the high-strength bolts and install the ring groove rivets in the above-mentioned numbering sequence from the inside out, the internal force of the node structure is transmitted symmetrically and smoothly from the center to the outside, avoiding stress concentration caused by continuous operation in the same area, thereby effectively suppressing the local deformation of the chord splice plate 12 and the abnormal opening of the splice seam 121.

[0043] like Figure 1 As shown, Figure 1 This is a front view of a steel truss node structure according to one embodiment of this application. In one embodiment, it further includes a vertical web member 14 and at least two diagonal web members 13. The two diagonal web members 13 are obliquely connected below the upper chord member 11, and the vertical web member 14 is vertically connected below the upper chord member 11 and located between the two diagonal web members 13.

[0044] Specifically, the steel truss girder node structure includes an upper chord member 11, a chord splice plate 12 installed on the upper chord member 11, diagonal web members 13, and vertical web members 14, which together bear and transmit the bridge load.

[0045] The upper chord member 11 serves as the main load-bearing component. At least two diagonal web members 13 are symmetrically connected below the upper chord member 11 at a certain inclination angle, providing diagonal support for the node structure. A vertical web member 14 is vertically connected below the upper chord member 11 and located between the two diagonal web members 13. Four chord splice plates 12 are provided at one end of the upper chord member 11 for connecting the extension portion of the upper chord member 11.

[0046] like Figure 4 As shown, Figure 4This is a schematic diagram of the connection area of ​​the diagonal web member 13 in one embodiment of this application. In one embodiment, the diagonal web member 13 includes at least four connection areas, and the preset numbers of the connection areas gradually increase outward from the center position near the connection node between the diagonal web member 13 and the upper chord member 11.

[0047] Specifically, the diagonal web member 13 is connected to the upper chord member 11. Multiple rows of connection holes 122 for high-strength bolts are formed on the diagonal web member 13, creating at least four connection areas. Using the center line of the connection node between the diagonal web member 13 and the upper chord member 11 as the boundary, the upper right portion of the diagonal web member 13 is defined as the first connection area 21, the upper left portion as the second connection area 22, the lower left portion as the third connection area 23, and the lower right portion as the fourth connection area 24. The first connection area 21 and the second connection area 22 are symmetrically arranged, as are the third connection area 23 and the fourth connection area 24.

[0048] The four connecting holes 122 closest to the center of the connection node between the diagonal web member 13 and the upper chord member 11 are defined as the first sequence. Specifically, the connecting hole 122 located in the first connection area 21 is numbered 1, the connecting hole 122 located in the second connection area 22 is numbered 2, the connecting hole 122 located near number 1 in the first connection area 21 is numbered 3, and the connecting hole 122 located near number 2 in the fourth connection area 24 is numbered 4. Similarly, the connecting hole 122 located near the connection node in the fourth connection area 24 is numbered 27, the connecting hole 122 located near the connection node in the third connection area 23 is numbered 28, the connecting hole 122 at the outermost edge of the fourth connection area 24 is numbered 41, and the connecting hole 122 at the outermost edge of the third connection area 23 is numbered 42.

[0049] The preset numbering values ​​of the connecting holes 122 on the diagonal web member 13 gradually increase outward from the center position near the connection node between the diagonal web member 13 and the upper chord member 11. The nodes of the diagonal web member 13 mainly bear alternating axial stress, ensuring that the replacement work starts from the area with the highest stress and proceeds in an orderly manner to the periphery with lower stress, effectively avoiding local instability of the node plate or loosening of the connection caused by removing too many fasteners at once in the high-stress area.

[0050] like Figure 5 As shown, Figure 5 This is a schematic diagram of the connection area of ​​the vertical web member 14 in one embodiment of this application. In one embodiment, the vertical web member 14 includes at least four connection areas, and the preset numbers of the connection areas gradually increase outward from the center position near the connection node between the vertical web member 14 and the upper chord member 11.

[0051] Specifically, the vertical web member 14 is perpendicularly connected to the upper chord member 11. Multiple rows of connecting holes 122 are formed on the vertical web member 14, symmetrically distributed around its axis, creating at least four connecting areas. Using the axis of the vertical web member 14 as the boundary, the upper left portion of the vertical web member 14 is defined as the first connecting area 21, the upper right portion as the second connecting area 22, the lower left portion as the third connecting area 23, and the lower right portion as the fourth connecting area 24. The first connecting area 21 and the second connecting area 22 are symmetrically arranged, as are the third connecting area 23 and the fourth connecting area 24.

[0052] The four connecting holes 122 closest to the center of the connection node between the vertical web member 14 and the upper chord member 11 are defined as the first sequence. Specifically, the connecting hole 122 located in the first connection area 21 is numbered 1, the connecting hole 122 located in the second connection area 22 is numbered 2, the connecting hole 122 located near number 1 in the first connection area 21 is numbered 3, and the connecting hole 122 located near number 2 in the fourth connection area 24 is numbered 4. Similarly, the connecting hole 122 located near the connection node in the third connection area 23 is numbered 9, the connecting hole 122 located near the connection node in the fourth connection area 24 is numbered 10, the connecting hole 122 at the outermost edge of the third connection area 23 is numbered 15, and the connecting hole 122 at the outermost edge of the fourth connection area 24 is numbered 16.

[0053] The nodes of the vertical web member 14 bear the pressure caused by the batch disassembly of fasteners. The preset number value of the connecting hole 122 on the vertical web member 14 gradually increases outward from the center position near the connection node between the vertical web member 14 and the upper chord member 11, ensuring that the pressure can be transferred smoothly and symmetrically, effectively preventing excessive local pressure or instability.

[0054] In one embodiment, the connecting hole 122 is used to install a grooved rivet connector. The diameter of the grooved rivet connector is adapted to the diameter of the connecting hole 122.

[0055] Specifically, the grooved rivet connection pair includes a grooved rivet and a collar, which is used to replace the original high-strength bolts and become the load-bearing connection between the chord splice plates 12.

[0056] Since the diameter of the grooved rivet is the same as that of the original high-strength bolt, there is no need to process the original connecting hole 122. The grooved rivet can be directly inserted into the original hole for fixing, thus achieving replacement, preserving the original design strength, improving construction efficiency, and reducing costs and operational difficulty.

[0057] In one embodiment, the connecting hole 122 is a reamed hole structure, and the diameter of the ring-grooved rivet connection pair is larger than the aperture of the connecting hole 122.

[0058] Specifically, to meet higher bearing capacity requirements, or when the original connecting hole 122 is damaged or corroded, a ring-grooved rivet with one larger diameter grade is required. The original connecting hole 122 is mechanically reamed to form the reamed hole structure, which is adapted to the size of the ring-grooved rivet with a larger diameter, so as to improve the connection strength and guarantee long-term use stability.

[0059] In one embodiment, the collar end of the ring-grooved rivet connection pair is provided with a deformation part, and the deformation part is fitted and arranged with the ring groove of the ring-grooved rivet.

[0060] Specifically, after the ring-grooved rivet connection pair is installed, a plastic deformation part is formed at the end of the collar. The deformation part is formed by plastic flow of the material of the collar body under the tensile force of a hydraulic riveter, after being squeezed and guided by the ring groove on the ring-grooved rivet.

[0061] The material of the deformation part fills and closely fits the concave contour of the ring groove, forming a mechanical interlock in the radial direction to prevent the ring-grooved rivet connection pair from loosening under vibration working conditions. In the axial direction, the fitting surface between the deformation part and the ring groove forms a locking inclined surface, which clamps the chord splicing plate 12 between the rivet head and the deformation part, generating a stable axial pre-tightening force and improving the connection strength.

[0062] In one embodiment, a ring gauge is also provided, which is applied to the steel truss node structure as described above. The ring gauge is a cylindrical structure provided with an inner hole, the inner hole diameter of the ring gauge is adapted to the outer diameter of the collar of the ring-grooved rivet, and the cylinder height of the ring gauge is adapted to the height of the collar of the ring-grooved rivet.

[0063] Specifically, the ring gauge is a cylindrical structure made of rigid material such as tool steel. The ring gauge includes an inner hole and a cylinder body, and the inner hole is a cylindrical hole penetrating the cylinder body. The cylinder body constitutes the main part of the ring gauge, and has an upper end surface and a lower end surface.

[0064] The diameter of the inner hole is adapted to the maximum outer diameter of the collar of the ring-grooved rivet, that is, the collar can be sleeved into the inner hole. The height of the cylinder body is adapted to the minimum height of the collar of the ring-grooved rivet, that is, the end surface of the collar reaches or exceeds the upper end surface of the ring gauge.

[0065] Place the lower end surface of the ring gauge close to the rivet head of the ring-grooved rivet or the plane of the chord splicing plate 12, and lower the ring gauge to sleeve it onto the collar. If the end surface of the collar exceeds or is flush with the upper end surface of the ring gauge, the installation of the ring-grooved rivet is determined to be qualified. If the end surface of the collar is lower than the upper end surface of the ring gauge, it indicates that the forming height of the collar is insufficient; or, if the ring gauge cannot be sleeved onto the collar, it indicates that the diameter of the collar is too small, and in both cases the installation of the ring-grooved rivet is determined to be unqualified.

[0066] By setting up ring gauges to inspect the installation and replacement of ring groove rivets, the installation quality can be ensured, the reliability of long-term use can be improved, and the inspection efficiency can be increased.

[0067] In one embodiment, a construction assembly is also provided, including the ring gauge as described above.

[0068] Specifically, the construction components include a ring gauge, which is applied to the steel truss node structure as described above. The ring gauge is used to disassemble high-strength bolts and install ring groove rivets according to the preset numbering and replacement sequence on the node structure. The ring gauge is also used to check the installation effect of the ring groove rivets, ensuring the safety of the bridge reconstruction and improving the overall quality and long-term reliability of the reconstruction.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A steel truss joint structure, characterized by, include: The upper chord member and at least four chord splicing plates are provided on the upper chord member, and splicing seams are provided between the chord splicing plates; two connection areas are provided on each side of the splicing seam, and multiple connection holes are provided on the chord splicing plate of each connection area. Each connection hole is provided with a preset number, and the preset number is arranged in a pattern that spreads outward from the center of the splicing seam in the four connection areas.

2. The steel truss node structure according to claim 1, characterized in that, The value of the preset number gradually increases radially from the center of the seam outwards.

3. The steel truss node structure according to claim 1, characterized in that, It also includes a vertical web member and at least two diagonal web members, the two diagonal web members being diagonally connected below the upper chord member, and the vertical web member being vertically connected below the upper chord member and located between the two diagonal web members.

4. The steel truss node structure according to claim 3, characterized in that, The diagonal web member includes at least four connection areas, and the preset number of the connection areas gradually increases outward from the center position near the connection node between the diagonal web member and the upper chord member.

5. The steel truss node structure according to claim 3, wherein The vertical web member includes at least four connection areas, and the preset number of the connection areas gradually increases outward from the center position near the connection node between the vertical web member and the upper chord member.

6. The steel truss node structure according to claim 1, wherein The connecting hole is used to install a ring groove rivet connection pair.

7. The steel truss node structure according to claim 6, characterized in that, The connecting hole is an enlarged hole structure, and the diameter of the annular groove rivet connection pair is larger than the diameter of the connecting hole.

8. The steel truss node structure according to claim 6, characterized in that, The collar end of the ring groove rivet connection pair is provided with a deformable part, which is fitted to fit the ring groove of the ring groove rivet.

9. A ring gage characterized by, The method is applied to the steel truss node structure as described in any one of claims 1-8, comprising: the ring gauge is a cylindrical structure with an inner hole, the inner hole diameter of the ring gauge is adapted to the outer diameter of the collar of the ring groove rivet, and the cylindrical height of the ring gauge is adapted to the height of the collar of the ring groove rivet.

10. A construction assembly characterised in that, Including the ring gauge as described in claim 9.

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