Embedded joint structure and steel structure assembly

Abstract

The invention relates to the technical field of steel structure joint design and construction, and discloses an embedded joint structure and a steel structure assembly.The embedded joint structure comprises an upper panel, a vertical web and a bottom panel; the upper panel and the bottom panel are arranged in parallel; the vertical web is arranged between the upper panel and the bottom panel; the upper panel and the bottom panel are constructed to be capable of being embedded and fixed in the box girder so that loads can be transmitted through the upper partition plate and the lower partition plate in the box girder. The stress stability and the load transmission reliability of the connecting part of the whole steel structure can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of steel structure joint design and construction technology, specifically to embedded joint structures and steel structure components. Background Technology

[0002] In the construction of steel truss bridges, traditional structures typically consist of two main box girders and a central crossbeam. The crossbeam and main girders are connected by exposed joints to form a stable frame, and the connection ports often employ a flat, vertical design. However, this traditional structure has several technical drawbacks in practical applications:

[0003] During the installation process, when using lifting equipment to hoist the crossbeams, the lack of temporary support points and the difficulty in maintaining consistency between the hoisting and installation states result in a long alignment operation time. This process also easily wears down the paint friction surface at the joints, affecting the structural integrity and corrosion resistance.

[0004] In terms of structural design and construction, the bottom, web, and top plates of the exposed joints are welded to the web of the box girder, and the joints and internal partitions of the box girder are reinforced with ribs to ensure load transfer. However, to meet the stiffening installation requirements, sufficient space for rib reinforcement needs to be reserved inside the box girder. This not only makes the joint structure larger but also easily creates confined spaces, significantly increasing the construction difficulty. More importantly, after the joint is installed, it is impossible to check its fit with the internal rib reinforcement, directly affecting the stability and reliability of load transfer. In addition, when the joint has an angular deviation in one or both directions of the transverse and longitudinal directions, it is difficult to achieve precise rib alignment with the internal stiffening plates of the box girder, resulting in insufficient overall installation accuracy and restricting the structural stability and service life of the steel truss bridge. Summary of the Invention

[0005] The present invention provides an embedded joint structure and a steel structure component to solve the above-mentioned problems.

[0006] In a first aspect, the present invention provides an embedded connector structure, comprising:

[0007] Top panel, vertical web, and bottom panel;

[0008] The upper panel and the bottom panel are arranged in parallel.

[0009] The vertical web is disposed between the upper panel and the bottom panel;

[0010] The upper and lower panels are configured to be embedded and fixed inside the box girder so that the load is transferred through the upper and lower diaphragms inside the box girder.

[0011] In this embedded joint structure, the top and bottom panels are arranged parallel to each other, with a vertical web connecting and supporting them to form a frame structure with a stable load-bearing foundation. When used in conjunction with a box girder, the top and bottom panels can be embedded into the box girder, forming a tight and reliable connection through fixing measures. When the joint bears external loads, the load can be directly transferred through the top panel to the upper diaphragm inside the box girder, and simultaneously through the bottom panel to the lower diaphragm inside the box girder. Utilizing the load-bearing and force-dispersing effects of the upper and lower diaphragms within the box girder, the load is efficiently and evenly transferred from the joint to the box girder. This not only strengthens the overall connection between the joint and the box girder, preventing load accumulation in localized areas, but also enhances the joint's resistance to deformation by relying on the support of the vertical web for the top and bottom panels, thereby ensuring the stress stability and load transfer reliability of the entire steel structure connection.

[0012] In one optional embodiment, the lower part of one side of the connection port of the vertical web is provided with an outwardly convex bevel, and the other side is provided with a bevel.

[0013] The structural design of the vertical web connection port has a clear functional orientation: the outward convex angle on one side plays an auxiliary role in the installation of the crossbeam. When the crossbeam is hoisted and connected, the outward convex angle can provide temporary support or positioning benchmark for the crossbeam, helping to quickly adjust the crossbeam posture and reduce the difficulty and time consumption of crossbeam alignment. At the same time, after the crossbeam is erected, if the bolted connection between the crossbeam and other components fails, the outward convex angle can also play a certain role in limiting and bearing, preventing excessive displacement of the crossbeam and providing additional protection for structural safety. The bevel on the other side of the connection port can be directly used as a benchmark reference for the installation angle of the vertical web by precisely controlling its angle dimension during the parts cutting process. This allows the vertical web to accurately match the preset installation angle requirements when it is connected to the box girder or related components, avoiding problems such as excessive gaps or insufficient connection accuracy due to angle deviation. This ensures the connection coordination between the vertical web and the overall embedded joint structure and the box girder, laying the foundation for the stable transmission of subsequent loads.

[0014] In one optional embodiment, a slot is provided on the bottom panel, and the center line of the slot is on the same straight line as the center line of the vertical web plate to ensure alignment with the stiffening ribs inside the box.

[0015] The slots on the bottom panel and the vertical web are collinear at their centerlines. This design, through precise dimensional control and positional matching, provides a clear positioning benchmark for the alignment of the internal stiffeners of the enclosure. Since the vertical web is the core supporting component in the embedded joint structure, its centerline can serve as a reference for the overall installation and positioning of the joint. Aligning the centerline of the bottom panel slot with the centerline of the vertical web ensures that the slot's position on the bottom panel corresponds perfectly to the pre-set position of the internal stiffeners, avoiding alignment deviations caused by misalignment of the slot and stiffeners. This collinear design allows the bottom panel slot to directly and precisely align with the internal stiffeners during the joint's installation within the enclosure. This simplifies the alignment process, reduces adjustment time, and ensures the effective connection between the bottom panel and the stiffeners. This, in turn, ensures the stability of the load transferred to the stiffeners through the bottom panel slot, preventing localized stress concentration due to misalignment and laying the foundation for the coordinated stress distribution between the entire embedded joint structure and the enclosure.

[0016] In one alternative implementation, the slot size on the bottom panel has a preset positive tolerance compared to the theoretical rib size.

[0017] In one alternative implementation, the positive tolerance is 2 mm.

[0018] In one optional embodiment, when the joint structure is installed on the main box girder, the height of the bottom panel from the bottom plate of the main girder is 1 / 6 or more of the width of the bottom panel.

[0019] When the joint structure is installed on the main box girder, the height of the bottom panel from the bottom plate of the main girder is set to 1 / 6 or more of the width of the bottom panel. The core objective of this dimension design is to reserve sufficient construction operation space between the bottom panel and the bottom plate of the main girder. This space can fully meet several key requirements during construction: on the one hand, it provides sufficient operating space for welding operations between the bottom panel and related components inside the main box girder, ensuring that welding tools can smoothly reach the welding area and guaranteeing the forming quality and connection strength of the weld; on the other hand, the ample space facilitates subsequent grinding of the welded parts, effectively removing impurities such as welding slag and burrs, and ensuring the flatness of the bottom panel surface and the connection parts; at the same time, it also creates favorable conditions for the sandblasting and painting process, allowing sandblasting tools to fully cover the bottom panel and surrounding areas, ensuring uniform paint coating adhesion and improving the corrosion resistance of the structure. This height setting not only avoids reduced construction efficiency or substandard construction quality due to limited operating space, but also strengthens the reliability of its connection with the main box girder by ensuring the construction quality of the bottom panel, providing support for the stable transfer of load from the joint structure to the main box girder.

[0020] Secondly, the present invention also provides a steel structure component, including a main box girder and an embedded joint structure, wherein the web of the main box girder is provided with an embedding slot for embedding the joint structure and through holes at both ends of the embedding slot.

[0021] The main box girder and the embedded joint structure achieve precise docking and stable assembly through embedded slots on the web of the main box girder and through holes at both ends. The contour of the embedded slot matches the shape of the embedded joint structure, providing the main embedding channel and positioning frame for the joint structure. This ensures the joint structure can be embedded into the main box girder along a predetermined path, reducing positional deviations during embedding. The through holes at both ends of the embedded slot serve as supplementary structures for auxiliary positioning and stress release. On one hand, the through holes provide clearance space for the connection points at both ends of the joint structure, preventing interference between the joint structure and the web during embedding and ensuring smooth embedding operations. On the other hand, the through holes at both ends disperse stress concentration around the embedded slot, forming a synergistic structural layout with the embedded slot and reducing the risk of localized stress on the web caused by the slot. Once the embedded joint structure is embedded, the slot wall fits tightly against the joint structure. Combined with the auxiliary constraint of the through holes, this significantly improves the overall connection integrity between the joint structure and the main box girder, creating conditions for efficient load transfer between the two, thereby enhancing the structural stability and load-bearing capacity of the entire steel structure assembly. Among them, the through hole is a waist hole. The long axis of the waist hole is 50mm larger than the width of the embedded groove (25mm on one side). The outer edge of the short axis of the waist hole is 25mm larger than the outer edge of the panel (top panel or bottom panel) to compensate for the manufacturing error of the joint. The through hole can realize the fine adjustment of the structure in the left and right directions.

[0022] In one alternative embodiment, the through hole on the web of the main box girder is a stress relief hole.

[0023] In one optional embodiment, the main box girder is provided with an upper partition and a lower partition, the upper panel is inserted into and fixed in the gap between the upper partition and the lower partition, and the bottom panel is connected to the lower partition through a slot thereon.

[0024] The upper and lower diaphragms inside the main box girder are not only important components of the main box girder's load-bearing system, but also provide crucial support for the precise installation and load transfer of the embedded joint structure. The upper panel of the joint can be smoothly inserted into the gap between the upper and lower diaphragms. After insertion, it is tightly connected to the upper and lower diaphragms through fixing measures (such as welding). This embedded fixing method integrates the upper panel with the diaphragm structure inside the main box girder, effectively avoiding connection gaps between the upper panel and the diaphragms. This ensures that the load borne by the upper panel can be directly and evenly transferred to the upper and lower diaphragms, and then distributed to the overall structure of the main box girder through the diaphragms. Meanwhile, the bottom panel of the joint connects to the lower partition plate via a slot. The size and position of the slot are precisely designed to fit the structural shape of the lower partition plate, allowing the bottom panel and the lower partition plate to quickly align and form a stable connection. This ensures the tightness of the connection between the bottom panel and the lower partition plate, and also, through the positioning function of the slot, further enhances the accuracy of the reinforcement alignment between the bottom panel and the lower partition plate, preventing load transfer obstruction due to misalignment. Ultimately, through the coordinated connection of the top panel and the bottom panel with the upper and lower partition plates respectively, an efficient force transmission path is constructed between the joint structure and the main box girder, improving the stress stability and structural integrity of the entire steel structure component. A top plate is also fixed above the upper partition plate, and the top plate is fixed to the top of the web plates on both sides.

[0025] In one optional embodiment, the misalignment between the upper and lower partitions is controlled within ±1mm. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a front view of an embedded connector structure according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 Side view of the embedded connector structure shown;

[0029] Figure 3 for Figure 1 Top view of the bottom panel in the embedded connector structure shown;

[0030] Figure 4 This is a schematic diagram of the main box girder in another steel structure component according to an embodiment of the present invention;

[0031] Figure 5 for Figure 4 Schematic diagram of the structure of the web in the middle A direction;

[0032] Figure 6 This is a schematic diagram of another steel structure component according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of another positioning tool according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 11. Top panel;

[0036] 12. Vertical web;

[0037] 13. Bottom panel;

[0038] 21. Top slab;

[0039] 22. Web;

[0040] 23. Main beam bottom plate;

[0041] 24. Upper partition;

[0042] 25. Lower partition;

[0043] 26. Rib plate;

[0044] 27. Through hole;

[0045] 28. Support components;

[0046] 29. Positioning components;

[0047] 30. Embedded slot. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] In the construction of steel truss bridges, traditional structures typically consist of two main box girders and a central crossbeam. The crossbeam and main girders are connected by exposed joints to form a stable frame, and the connection ports often employ a flat, vertical design. However, this traditional structure has several technical drawbacks in practical applications:

[0050] During the installation process, when using lifting equipment to hoist the crossbeams, the lack of temporary support points and the difficulty in maintaining consistency between the hoisting and installation states result in a long alignment operation time. This process also easily wears down the paint friction surface at the joints, affecting the structural integrity and corrosion resistance.

[0051] In terms of structural design and construction, the exposed joint's bottom, web, and top plates 21 are welded to the box girder web 22, and the joint and the internal partition plates of the box girder are designed with ribs to ensure load transfer. However, to meet the stiffening installation requirements, sufficient space for ribs needs to be reserved inside the box girder. This not only makes the joint structure too large but also easily creates confined space, significantly increasing the construction difficulty. More importantly, after the joint is installed, it is impossible to check its fit with the internal ribs of the box girder, directly affecting the stability and reliability of load transfer. In addition, when the joint has an angular deviation in one or both directions of the transverse and longitudinal directions, it is difficult to achieve precise rib alignment with the internal stiffening plates 26 of the box girder, resulting in insufficient overall installation accuracy and restricting the structural stability and service life of the steel truss bridge.

[0052] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0053] According to an embodiment of the present invention, in one aspect, an embedded joint structure is provided, including an upper panel 11, a vertical web 12, and a bottom panel 13; the upper panel 11 and the bottom panel 13 are arranged in parallel; the vertical web 12 is disposed between the upper panel 11 and the bottom panel 13; the upper panel 11 and the bottom panel 13 are configured to be embedded and fixed inside the box girder so that the load is transmitted through the upper diaphragm 24 and the lower diaphragm 25 inside the box girder.

[0054] In this embedded joint structure, the upper panel 11 and the bottom panel 13 are arranged in parallel, and the vertical web 12 connects and supports them, forming a frame structure with a stable load-bearing foundation. When used in conjunction with a box girder, the upper panel 11 and the bottom panel 13 can be embedded into the box girder. After embedding, they form a tight and reliable connection with the box girder through fixing measures. When the joint bears external loads, the load can be directly transferred through the upper panel 11 to the upper diaphragm 24 inside the box girder, and simultaneously transferred through the bottom panel 13 to the lower diaphragm 25 inside the box girder. With the bearing and force distribution effects of the upper diaphragm 24 and the lower diaphragm 25 inside the box girder, the load is efficiently and evenly transferred from the joint to the box girder. This not only strengthens the overall connection between the joint and the box girder and avoids local load accumulation, but also enhances the joint's own deformation resistance by relying on the support of the vertical web 12 for the upper panel 11 and the bottom panel 13, thereby ensuring the stress stability and load transfer reliability of the entire steel structure connection.

[0055] In one embodiment, the lower part of one side of the connection port of the vertical web 12 is provided with an outwardly convex bevel, and the other side is provided with a bevel.

[0056] In this embodiment, the structural design of the connection port of the vertical web plate 12 has a clear functional orientation: the outward convex angle on the lower side can play an auxiliary role in the installation of the crossbeam. When the crossbeam is hoisted and connected, the outward convex angle can provide temporary support or positioning reference for the crossbeam, help to quickly adjust the crossbeam posture, reduce the difficulty and time consumption of crossbeam alignment. At the same time, after the crossbeam is erected, if the bolted connection between the crossbeam and other components fails, the outward convex angle can also play a certain role in limiting and bearing, preventing excessive displacement of the crossbeam, and providing additional protection for structural safety. The bevel on the other side of the connection port can be directly used as a reference for the installation angle of the vertical web plate 12 by precisely controlling its angle size during the parts cutting process. This allows the vertical web plate 12 to accurately match the preset installation angle requirements when it is connected with the box girder or related components, avoiding problems such as excessive gap or insufficient connection accuracy due to angle deviation. This ensures the connection coordination between the vertical web plate 12 and the overall embedded joint structure and the box girder, laying the foundation for the stable transmission of subsequent loads.

[0057] In one embodiment, the bottom panel 13 has a slot, the center line of which is on the same straight line as the center line of the vertical web 12, to ensure alignment with the stiffening plate 26 inside the box.

[0058] In this embodiment, the slot on the bottom panel 13 is collinear with the centerline of the vertical web 12. This design, through precise dimensional control and position matching, provides a clear positioning reference for the alignment of the internal stiffening plates 26. Since the vertical web 12 is the core supporting component in the embedded joint structure, its centerline can serve as a reference for the overall installation and positioning of the joint. Aligning the centerline of the slot on the bottom panel 13 with the centerline of the vertical web 12 ensures that the slot's position on the bottom panel 13 corresponds perfectly to the preset position of the internal stiffening plates 26, avoiding alignment deviations caused by misalignment of the slot and stiffening plates 26. This collinear design allows the slot of the bottom panel 13 to directly and precisely align with the internal stiffening plate 26 of the enclosure when the joint is embedded in the enclosure. This not only simplifies the difficulty of the stiffening operation and reduces the time spent on stiffening adjustment, but also ensures the effectiveness of the connection between the bottom panel 13 and the stiffening plate 26. This, in turn, ensures the stability of the load transmitted to the stiffening plate 26 through the slot of the bottom panel 13, and avoids localized stress concentration caused by inaccurate stiffening. This lays the foundation for the coordinated stress distribution between the entire embedded joint structure and the enclosure.

[0059] In one embodiment, the slot size on the bottom panel 13 has a preset positive tolerance compared to the theoretical rib size.

[0060] In this embodiment, the groove size on the bottom panel 13 is set with a preset positive tolerance compared to the theoretical rib size. This design fully adapts to the processing and installation requirements in actual construction scenarios. Considering the slight dimensional deviations that may occur during the part processing, and the slight alignment offsets that may occur when the bottom panel 13 and the internal stiffening plate 26 of the box are connected, the preset positive tolerance can provide reasonable compensation space for these potential deviations, effectively avoiding installation jamming problems caused by the groove size and the theoretical rib size being completely fitted together, ensuring that the bottom panel 13 can be smoothly embedded into the box and complete the initial alignment. At the same time, combined with the design benchmark that the center line of the groove of the bottom panel 13 is collinear with the center line of the vertical web 12, even with the preset positive tolerance, it will not deviate from the rib alignment benchmark direction with the internal stiffening plate 26 of the box. After the bottom panel 13 is installed in place, the tolerance gap can be eliminated through subsequent welding and other connection processes, ensuring a tight fit between the bottom panel 13 and the stiffening plate 26. This not only ensures the alignment accuracy but also improves the installation efficiency, ultimately providing reliable support for the stable transmission of load through the bottom panel 13 to the stiffening plate 26.

[0061] In one embodiment, the positive tolerance is 2 mm.

[0062] In this embodiment, the groove size on the bottom panel 13 is set with a positive tolerance of 2mm compared to the theoretical rib size. Considering the minor errors that may exist during the part processing stage (such as cutting accuracy deviation, slight deformation of the plate, etc.), and the alignment adjustment requirements when the bottom panel 13 and the internal rib plate 26 of the box are connected, the positive tolerance of 2mm can provide compensation space. This avoids the problem of installation jamming and failure to be smoothly embedded when the groove and the rib plate 26 are aligned due to the tolerance being too small, and also prevents the subsequent loss of control over the rib alignment accuracy due to the tolerance being too large. Meanwhile, relying on the positioning benchmark design that the center line of the groove of the bottom panel 13 is collinear with the center line of the vertical web 12, even if there is a 2mm positive tolerance in the groove, the installation and adjustment can always be carried out around the preset rib alignment benchmark direction. After the bottom panel 13 is embedded into the box and the initial alignment is completed, the tolerance gap can be precisely eliminated through the subsequent welding process, ensuring that the groove of the bottom panel 13 fits tightly with the internal stiffening plate 26 of the box. This not only improves the smoothness of the installation operation, but also ensures the accuracy of the rib alignment, laying the foundation for the stable transmission of load through the bottom panel 13 to the stiffening plate 26, and avoiding the impact of installation obstruction or inaccurate rib alignment on the stress stability of the overall steel structure connection parts.

[0063] In one embodiment, when the joint structure is installed on the main box girder, the height of the bottom panel 13 from the bottom plate 23 of the main girder is 1 / 6 or more of the width of the bottom panel 13.

[0064] In this embodiment, when the joint structure is installed on the main box girder, the height of the bottom panel 13 from the main girder bottom plate 23 is set to 1 / 6 or more of the width of the bottom panel 13. The core objective of this size design is to reserve sufficient construction operation space between the bottom panel 13 and the main girder bottom plate 23. This space can fully meet several key requirements in the construction process: on the one hand, it can provide sufficient operating space for welding operations between the bottom panel 13 and related components inside the main box girder, ensuring that welding tools can smoothly reach the welding area and guaranteeing the forming quality and connection strength of the weld; on the other hand, the ample space facilitates subsequent grinding of the welded parts, effectively removing impurities such as welding slag and burrs, and ensuring the flatness of the surface of the bottom panel 13 and the connection parts; at the same time, it can also create favorable conditions for the sandblasting and painting process, allowing the sandblasting tools to fully cover the bottom panel 13 and the surrounding area, ensuring uniform adhesion of the paint coating and improving the corrosion resistance of the structure. This height setting avoids reduced construction efficiency or substandard construction quality due to limited operating space, while ensuring the construction quality of the bottom panel 13 and strengthening its connection reliability with the main box girder, thus providing support for the stable transfer of load from the joint structure to the main box girder.

[0065] According to an embodiment of the present invention, another aspect provides a steel structure component, including a main box girder and an embedded joint structure, wherein the web 22 of the main box girder is provided with an embedding slot 30 for embedding the joint structure and a through hole 27 provided in the embedding slot 30.

[0066] In the steel structure assembly of this embodiment, the main box girder and the embedded joint structure achieve precise docking and stable assembly through the embedding slots 30 on the web plate 22 of the main box girder and the through holes 27 at both ends. The contour of the embedding slots 30 matches the shape of the embedded joint structure, providing the main embedding channel and positioning frame for the joint structure, ensuring that the joint structure can be embedded into the main box girder along a predetermined path, reducing positional deviations during the embedding process. The through holes 27 at both ends of the embedding slots 30 serve as supplementary structures for auxiliary positioning and stress release. On the one hand, the through holes 27 provide clearance space for the connection parts at both ends of the joint structure, preventing interference between the joint structure and the web plate 22 during embedding, ensuring smooth embedding operations. On the other hand, the through holes 27 at both ends can disperse stress concentration around the embedding slots 30, forming a coordinated structural layout with the embedding slots 30, reducing the risk of localized stress on the web plate 22 caused by the slots. Once the embedded joint structure is inserted, the groove wall of the insertion slot 30 fits tightly against the joint structure. Combined with the auxiliary constraint of the through hole 27, this significantly improves the overall connection between the joint structure and the main box girder, creating conditions for efficient load transfer between them, thereby enhancing the structural stability and load-bearing capacity of the entire steel structure component. The through hole 27 is a waist-shaped hole, with its major axis dimension 50mm larger than the width of the insertion slot (25mm on each side), and its minor axis outer edge 25mm larger than the outer edge of the panel (top or bottom panel) to compensate for manufacturing errors in the joint. Fine adjustments to the left and right directions of the structure can be achieved through the through hole.

[0067] In one embodiment, the through hole 27 on the web 22 of the main box girder is a stress relief hole.

[0068] In this embodiment, the through hole 27 on the web 22 of the main box girder is designed as a stress relief hole. This design directly addresses the problem of localized stress concentration in the web 22 caused by the embedded slot 30. Since the embedded slot 30 disrupts the original stress balance of the web 22, its surrounding area is prone to forming a high-stress zone due to force convergence. Long-term stress may lead to cracking or deformation of the web 22. Designing the through hole 27 as a stress relief hole allows its arc-shaped hole wall to guide the stress to diffuse smoothly along the hole edge, effectively decomposing the concentrated stress around the embedded slot and preventing excessive stress accumulation in a localized area. Simultaneously, the through hole 27, as a stress relief hole, forms a synergistic structure with the embedded slot. This provides necessary clearance space for the embedding of the internal joint structure, ensuring smooth embedding operations, and also enhances the structural stability of the web 22 through stress dispersion. This ensures that the main box girder, after being connected to the internal joint structure, experiences more balanced overall stress, improving the fatigue resistance and service life of the steel structure components.

[0069] In one embodiment, the main box girder is provided with an upper partition 24 and a lower partition 25. The upper panel 11 is inserted into and fixed in the gap between the upper partition 24 and the lower partition 25, and the bottom panel 13 is connected to the lower partition 25 through a slot thereon.

[0070] In this embodiment, the upper diaphragm 24 and lower diaphragm 25 inside the main box girder are not only important components of the main box girder's load-bearing system, but also provide crucial support for the precise installation and load transfer of the embedded joint structure. The upper panel 11 of the joint can be smoothly inserted into the gap between the upper diaphragm 24 and lower diaphragm 25. After insertion, it forms a tight connection with the upper diaphragm 24 and lower diaphragm 25 through fixing measures (such as welding). This embedded fixing method integrates the upper panel 11 with the diaphragm structure inside the main box girder, effectively avoiding connection gaps between the upper panel 11 and the diaphragms. This ensures that the load borne by the upper panel 11 can be directly and evenly transferred to the upper diaphragm 24 and lower diaphragm 25, and then distributed to the overall structure of the main box girder through the diaphragms. Meanwhile, the bottom panel 13 of the joint connects to the lower partition 25 via a slot. The size and position of the slot are precisely designed to fit the structural shape of the lower partition 25, allowing the bottom panel 13 and the lower partition 25 to quickly align and form a stable connection. This ensures the tightness of the connection between the bottom panel 13 and the lower partition 25, and also enhances the accuracy of the reinforcement alignment between the bottom panel 13 and the lower partition 25 by relying on the positioning function of the slot. This avoids load transfer obstruction due to connection misalignment. Finally, through the coordinated connection of the upper panel 11 and the bottom panel 13 with the upper and lower partitions 25 respectively, an efficient force transmission path is constructed between the joint structure and the main box girder, improving the stress stability and structural integrity of the entire steel structure component. A top plate 21 is also fixed above the upper partition 24, and the top plate 21 is fixed to the top of the web plates 22 on both sides.

[0071] In one embodiment, the misalignment between the upper partition 24 and the lower partition 25 is controlled within ±1mm.

[0072] In this embodiment, the misalignment between the upper partition 24 and the lower partition 25 is strictly controlled within ±1mm. On one hand, this minimal misalignment ensures a uniform and regular gap between the upper partition 24 and the lower partition 25. This gap is the core space for the insertion of the upper panel 11 of the connector. A uniform gap prevents the upper panel 11 from getting stuck due to narrow local spaces or from not fitting tightly after insertion due to excessive local spaces, thus ensuring the alignment accuracy of the upper panel 11 and the upper and lower partitions 25. On the other hand, controlling the misalignment within ±1mm ensures that the force-bearing surfaces of the upper partition 24 and the lower partition 25 remain flat and continuous, avoiding the "step-like" appearance caused by misalignment. The structure causes localized stress concentrations during load transfer, ensuring that the upper and lower partitions 25 can share the load evenly and efficiently transfer the load from the upper panel 11. At the same time, this precise misalignment control can also enhance the structural integrity of the upper partition 24 and lower partition 25 within the main box girder, reducing interference with the overall stress performance of the main box girder due to partition misalignment. This provides a reliable foundation for the stable connection between the bottom panel 13 and the lower partition 25, and for the coordinated stress distribution between the embedded joint structure and the main box girder, further ensuring the load transfer reliability and long-term structural durability of the entire steel structure component.

[0073] According to an embodiment of the present invention, another aspect provides a positioning fixture, including support members 28 adapted to be disposed on both sides of the upper partition 24 and positioning members 29 for positioning the joint between the upper partition 24 and the lower partition 25.

[0074] In this embodiment, the positioning fixture, through the synergistic action of the support member 28 and the positioning member 29, ensures the precise installation of the upper partition 24 and the lower partition 25. The support member 28, which is suitable for being set on both sides of the upper partition 24, can provide stable support for the upper partition 24 from the lateral direction during the installation process, preventing the upper partition 24 from shifting, tilting, or even overturning due to its own weight or external operational interference, ensuring that the upper partition 24 is always in the preset installation posture, laying the foundation for subsequent splicing and alignment with the lower partition 25. The positioning member 29, used to position the splicing point of the upper partition 24 and the lower partition 25, can directly act on the splicing contact surface of the two, and strictly control the installation accuracy at the splicing point through structural limiting or dimensional calibration. It can not only limit the lateral misalignment of the upper partition 24 and the lower partition 25 during splicing, ensuring that the misalignment of the two installations meets the requirements, but also assist in adjusting the gap and verticality at the splicing point, avoiding uneven gaps between the upper partition 24 and the lower partition 25 due to splicing deviations. This positioning fixture design effectively reduces the operational difficulty during the installation of the upper partition 24 and the lower partition 25, improves installation efficiency and accuracy, and ensures that the upper partition 24 and the lower partition 25 form a regular and stable internal structure. This provides a reliable foundation for the smooth embedding and stable connection of the upper panel 11 of the subsequent embedded joint structure, ensuring the installation quality and stress stability of the entire steel structure component.

[0075] Specifically, the support member 28 is a support rod used to support both sides of the upper partition 24. The positioning member 29 can be a plate-shaped piece, fixed at the joint between the upper partition 24 and the lower partition 25, used to limit the position of the upper partition 24 and the lower partition 25.

[0076] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An insert joint structure characterized by, include: Top panel (11), vertical web (12) and bottom panel (13); The upper panel (11) and the bottom panel (13) are arranged in parallel; The vertical web plate (12) is disposed between the upper panel (11) and the bottom panel (13); The upper panel (11) and the bottom panel (13) are configured to be embedded and fixed inside the box girder so that the load is transmitted through the upper diaphragm (24) and the lower diaphragm (25) inside the box girder.

2. The insert joint structure of claim 1, wherein The lower part of one side of the connection port of the vertical web (12) is provided with an outward convex bevel, and the other side is provided with a bevel.

3. The insert joint structure of claim 1, wherein The bottom panel (13) has a slot, and the center line of the slot is on the same straight line as the center line of the vertical web (12) to ensure that it is aligned with the stiffening plate (26) inside the box.

4. The interior joint structure of claim 3, wherein, The groove size on the bottom panel (13) has a preset positive tolerance compared to the theoretical rib size.

5. The interior joint structure of claim 4, wherein, The positive tolerance is 2 mm.

6. The interior joint structure of claim 1, wherein, When the joint structure is installed on the main box girder, the height of the bottom panel (13) from the bottom plate (23) of the main girder is 1 / 6 or more of the width of the bottom panel (13).

7. A steel construction assembly, c h a r a c t e r i s e d in that Includes a main box girder and an embedded joint structure as described in any one of claims 1-6, wherein the web plate (22) of the main box girder is provided with an embedding slot (30) for embedding the joint structure and through holes (27) at both ends of the embedding slot (30).

8. The steel structural assembly of claim 7, wherein, On the web (22) of the main box girder, the through hole (27) is a stress relief hole.

9. The steel structural assembly of claim 7, wherein, The main box girder is provided with an upper partition (24) and a lower partition (25). The upper panel (11) is inserted into and fixed in the gap between the upper partition (24) and the lower partition (25). The bottom panel (13) is connected to the lower partition (25) through a slot on it.

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