Fabricated reinforcing joint of large-span pipe truss and construction method
The prefabricated reinforcement device, which connects square reinforcement nodes with high-strength bolts, solves the stability problem of large-span tubular truss structures under long-term use and extreme conditions, and achieves a stable connection and rapid repair of the structure.
Patent Information
- Application Number
- CN202511110672.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-08
- Publication Date
- 2025-11-18
AI Technical Summary
Existing large-span tubular truss structures lack stability under long-term use and extreme conditions, and traditional reinforcement methods are prone to damaging existing structures.
An assembled reinforcement device using square reinforcement nodes and high-strength bolts is used. The chord is wrapped by a square upper cover and lower support, and combined with a rotatable structure such as a ball joint and a diagonal cable connection, prestress adjustment is achieved, relative rotation is avoided and stability is enhanced.
It improves the mechanical and seismic performance of long-span tubular truss structures, reduces damage to existing structures, and facilitates on-site construction and rapid post-disaster repair.
Smart Images
Figure CN120968280A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of building construction technology, and in particular to a prefabricated reinforcement node and construction method for a large-span tubular truss. Background Technology
[0002] Large-span tubular truss systems have won the favor of engineers due to their advantages such as high component cross-sectional load-bearing capacity, good seismic performance, and high degree of prefabrication. They are now widely used in large-span spatial structures. However, after decades of testing, the load-bearing capacity, stability, and the loads and functions borne by various large-span tubular truss structures have become significantly different. This has directly led to the collapse of the roof of the Huanan Stadium in Jiamusi, the gymnasium of Qiqihar No. 34 Middle School, and the ice rink in Baicheng City. Therefore, reinforcing existing large-span tubular truss structures is a direct way to prevent accidents.
[0003] This invention proposes a prefabricated reinforcement device for large-span tubular truss structures, specifically for round and rectangular tubular steel components. This prefabricated reinforcement device eliminates the need for on-site welding, minimizing damage to existing internal public facilities within the large-span tubular truss structure. It even eliminates the need for on-site drilling, allowing for the modification of the existing structure solely through high-strength bolt connections, achieving a fully assembled reinforcement system. Finally, adjustable prestressing of the steel strands is achieved through tensioning the cables, transforming the original structural system into a prestressed structure, significantly improving its mechanical and seismic performance. Summary of the Invention
[0004] The purpose of this invention is to provide a prefabricated reinforcement node and construction method for a large-span tubular truss, so as to solve at least one of the technical problems existing in the prior art.
[0005] To solve the above-mentioned technical problems, the present invention provides a prefabricated reinforcement node and construction method for a large-span tubular truss, including a square tube bottom chord, a square tube diagonal web member, end diagonal cables, intermediate diagonal cables, and struts; The square tubular diagonal web member is wrapped with a square reinforcing node; The lower end of the square reinforcement node is connected to one end of the strut or the end diagonal cable; The other end of the end cable is connected to the lower end of the strut; The two ends of the intermediate inclined cable are respectively connected to the ends of two adjacent support rods.
[0006] Furthermore, the square reinforcing node includes a square upper cover and a square lower support; The square upper cover and the square lower support respectively wrap around the square tubular lower chord from the upper and lower sides; The square upper cover piece and the square lower support piece are respectively provided with a first connecting plate and a second connecting plate; The first connecting plate and the second connecting plate are respectively provided with a first connecting hole for allowing a fastener to pass through and fasten.
[0007] Further, the square upper cover piece is in a segmented structure, and a gap is arranged between two segments to avoid the square tubular diagonal web member connected to the square tubular lower chord.
[0008] Further, the square lower support piece is further provided with a support self-locking surface, and the self-locking surface is provided with a three-dimensional texture to increase the friction between the square lower support piece and the square tubular lower chord.
[0009] Further, a connecting node is arranged between the reinforcing node and the strut; The connecting node comprises an upper connecting cylinder and an intermediate connecting cylinder; The upper connecting cylinder is fixedly connected to the square reinforcing node; The upper connecting cylinder and the intermediate connecting cylinder are connected through an insertion connecting pair; The intermediate connecting cylinder and the strut are respectively provided with a first flange and a second flange at opposite ends; The first flange and the second flange are connected by a fastener to connect the strut and the intermediate connecting cylinder.
[0010] Further, the insertion connecting pair comprises a connecting insertion plate arranged on the upper connecting cylinder and a connecting slot plate arranged on the intermediate connecting cylinder; A plurality of the connecting insertion plates are fixedly arranged in a circumferential array on the outer wall of the upper connecting cylinder; The connecting slot plates are arranged in pairs in parallel; A plurality of pairs of the connecting slot plates are fixedly arranged in a circumferential array on the outer wall of the intermediate connecting cylinder; A gap is arranged between a pair of the connecting slot plates, and the gap is greater than or equal to the thickness of the connecting insertion plate; The inner diameter of the intermediate connecting cylinder is greater than or equal to the outer diameter of the upper connecting cylinder; The upper connecting cylinder is inserted into the area surrounded by the intermediate connecting cylinder and the connecting slot plate.
[0011] Further, the square reinforcing node is connected to the diagonal cable through a rotatable structure; The rotatable structure is a pin shaft structure or a ball hinge structure; The position relationship between the square reinforcing node and the diagonal cable has a rotational freedom degree in at least one direction.
[0012] Further, the rotatable structure is a spherical hinge structure, comprising a first connecting part, a second connecting part, a hinge shell and a hinge ball; The hinge ball is fixedly arranged on the first connecting part, and the hinge shell is fixedly arranged on the second connecting part; The hinge shell is provided with an opening on one side of the hinge ball, the hinge ball is freely rotatably embedded in the hinge shell, and the hinge ball is connected with the first connecting part through an intermediate connecting part extending out of the opening.
[0013] Further, the hinge ball is an overall elliptical sphere, and sequentially comprises a first elliptical hemisphere and a second elliptical hemisphere in a long axis direction of the hinge ball; The first elliptical hemisphere and the second elliptical hemisphere are provided with guide holes, and a connecting column pin is arranged in the guide holes to form a guide limiting structure; The connecting column pin is further sleeved with a spring, and the two ends of the spring are respectively abutted on the first elliptical hemisphere and the second elliptical hemisphere, and tend to force the first elliptical hemisphere and the second elliptical hemisphere to move away from each other.
[0014] Further, the hinge shell is further wrapped with a fixed shell outside; The fixed shell and the hinge shell are further provided with an elastic layer in the middle; The hinge shell is provided with 3-6 slits at the opening, so that the hinge shell forms a plurality of elastic outwardly expandable and inwardly contractible petal-shaped parts at the opening.
[0015] On the other hand, the application also discloses a construction method of a fabricated reinforcing joint of a large-span pipe truss, comprising the following steps: S1: hoisting a square lower supporting part below a square tubular lower chord; S2: hoisting a square upper cover part above the square tubular lower chord, and connecting the square lower supporting part and the square upper cover part through high-strength bolts; S3: hoisting an intermediate connecting cylinder with a connecting slot plate and inserting and connecting the intermediate connecting cylinder upward with an upper connecting cylinder with a connecting plug plate, and tightly connecting the connecting plug plate and the connecting slot plate through high-strength bolts; S4: hoisting a supporting rod below the intermediate connecting cylinder, and connecting the first flange and the second flange through high-strength bolts; S5: hoisting a diagonal cable, and connecting the diagonal cable with the supporting rod and the square reinforcing joint; S6: adjusting the cable force of each diagonal cable to reach a design value through an adjusting cable force adjuster. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.
[0017] Figure 1 Schematic diagram of the three-dimensional structure of the fabricated reinforcing joint of the large-span pipe truss; Figure 2 Schematic diagram of the local three-dimensional structure at the square reinforcing joint and the connecting joint; Figure 3 Schematic diagram of the three-dimensional structure of the square supporting member of the square reinforcing joint; Figure 4 Schematic diagram of the three-dimensional structure after assembly at the connecting joint; Figure 5 Schematic diagram of the three-dimensional structure when the diagonal cable and the square reinforcing joint are connected by a pin shaft structure; Figure 6 Schematic diagram of the three-dimensional structure when the diagonal cable and the square reinforcing joint are connected by a spherical hinge structure; Figure 7 Schematic diagram of the three-dimensional structure of the square reinforcing joint and the connecting joint; Figure 6 Schematic diagram of the planar structure from the front view; Figure 8 Schematic diagram of the three-dimensional structure of the square reinforcing joint and the connecting joint; Figure 7 Schematic diagram of the three-dimensional structure of the square reinforcing joint and the connecting joint; Figure 9 Schematic diagram of the cross-sectional view of the spherical hinge structure; Figure 10 Schematic diagram of the three-dimensional structure of the square reinforcing joint and the connecting joint; Figure 9 Schematic diagram of the cross-sectional view of the middle A-A surface; Figure 11 Schematic diagram of the structure when the first and second ellipsoidal hemispheres start to deflect; Figure 12 Schematic diagram of the structure when the first and second ellipsoidal hemispheres deflect to the boundary of free rotation; Figure 13 Schematic diagram of the three-dimensional structure when the adjacent two diagonal cables are connected by a single pin shaft on the strut; Figure 14 Schematic diagram of the three-dimensional structure when the adjacent two diagonal cables are connected by a double pin shaft on the strut.
[0018] Reference signs: 1-square tube shaped lower chord; 2-square tube shaped diagonal web; 3-end diagonal cable; 4-intermediate diagonal cable; 5-strut; 6-square reinforced node; 7-square upper cover; 8-square lower support; 9-first connecting plate; 10-second connecting plate; 11-first connecting hole; 12-self-locking surface; 13-connecting node; 14-upper connecting cylinder; 15-intermediate connecting cylinder; 16-first flange; 17-second flange; 18-connecting plugboard; 19-connecting groove plate; 20-pin shaft structure; 21-ball hinge structure; 22-first connecting part; 23-second connecting part; 24-hinge shell; 25-hinge ball; 26-first ellipsoidal half; 27-second ellipsoidal half; 28-guiding hole; 29-connecting column pin; 30-spring; 31-fixing shell; 32-elastic layer; 33-first diagonal cable; 34-second diagonal cable; 35-pin shaft; 36-cable force regulator. DETAILED DESCRIPTION
[0019] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0020] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0021] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0022] It should also be noted that the following specific embodiments or specific embodiments are a series of optimized setting modes listed by the present application to further explain the specific invention content, and these setting modes can be used in combination or in association with each other.
[0023] The present invention will be further explained below with reference to specific embodiments.
[0024] like Figures 1-2 As shown in the figure, this embodiment provides a prefabricated reinforcement node and construction method for a large-span tubular truss, including a square tube-shaped lower chord 1, a square tube-shaped diagonal web member 2, an end diagonal cable 3, an intermediate diagonal cable 4, and a strut 5; The square tubular diagonal web member 2 is wrapped with a square reinforcing node 6; The lower end of the square reinforcing node 6 is connected to one end of the strut 5 or the end inclined cable 3; The other end of the end cable 3 is connected to the lower end of the support rod 5; The two ends of the intermediate inclined cable 4 are respectively connected to the ends of the two adjacent support rods 5.
[0025] like Figures 2-3 As shown, as a further embodiment of this example, the square reinforcing node 6 includes a square upper cover 7 and a square lower support 8; The square upper cover 7 and the square lower support 8 respectively wrap around the square tubular lower chord 1 from the upper and lower sides. The square upper cover 7 and the square lower support 8 are respectively provided with a first connecting plate 9 and a second connecting plate 10; The first connecting plate 9 and the second connecting plate 10 are respectively provided with first connecting holes 11 for fasteners to pass through and be tightened.
[0026] The prefabricated reinforcement node disclosed in this application connects the upper chord to the lower strut 5-cable system via a square reinforcement node 6. In this application, the chord is square, therefore the corresponding reinforcement node is also a directional reinforcement node. The upper square cover 7 and the lower square cover 7 form a square cylinder that encloses the square tubular lower chord 1. Traditionally, chords are generally cylindrical. However, when a cylindrical chord is installed with the lower strut 5, the fixed node is prone to relative rotation due to the circular sleeve, affecting the overall structural stability under long-term use and extreme conditions (such as earthquakes, strong winds, etc.).
[0027] like Figure 2 As shown, as a further embodiment of this example, the square upper cover 7 is a segmented structure with a gap between the two segments to avoid the square tubular inclined web member 2 connected to the square tubular lower chord 1.
[0028] like Figure 3 As shown, as a further embodiment of this example, the end of the square lower support 8 is also provided with a support self-locking surface 12, and the self-locking surface 12 is provided with three-dimensional texture to increase the friction between the square lower support 8 and the square tubular lower chord 1.
[0029] As shown in Figure 4 , as a further embodiment of the present embodiment, a connecting node 13 is arranged between the reinforcing node and the strut 5; The connecting node 13 comprises an upper connecting cylinder 14 and an intermediate connecting cylinder 15; The upper connecting cylinder 14 is fixedly connected with the square reinforcing node 6; The upper connecting cylinder 14 and the intermediate connecting cylinder 15 are provided with insertion connecting pairs and are connected through the insertion connecting pairs; The opposite ends of the intermediate connecting cylinder 15 and the strut 5 are respectively provided with a first flange 16 and a second flange 17; The first flange 16 and the second flange 17 are connected by fasteners to connect the strut 5 with the intermediate connecting cylinder 15.
[0030] As shown in Figure 4 , as a further embodiment of the present embodiment, the insertion connecting pairs comprise a connecting plugboard 18 arranged on the upper connecting cylinder 14 and a connecting slot plate 19 arranged on the intermediate connecting cylinder 15; A plurality of the connecting plugboards 18 are fixedly arranged in a circumferential array on the outer wall of the upper connecting cylinder 14; The connecting slot plates 19 are arranged in pairs in parallel; A plurality of pairs of the connecting slot plates 19 are fixedly arranged in a circumferential array on the outer wall of the intermediate connecting cylinder 15; A pair of the connecting slot plates 19 are arranged with a spacing, and the spacing is greater than or equal to the thickness of the connecting plugboard 18; The inner diameter of the intermediate connecting cylinder 15 is greater than or equal to the outer diameter of the upper connecting cylinder 14; The upper connecting cylinder 14 is inserted into the area surrounded by the intermediate connecting cylinder 15 and the connecting slot plate 19.
[0031] The structure at the connecting node 13 disclosed in the present application adopts a three-section structure, which is the upper connecting cylinder 14 fixedly connected with the square reinforcing node 6, the intermediate connecting cylinder 15 for inserting the upper connecting cylinder 14, and the flange structure at the top end of the strut 5. When connecting, the upper connecting cylinder 14 and the intermediate connecting cylinder 15 are sleeved, and the connecting slot plate 19 and the connecting plugboard 18 are fastened and connected by fasteners, and then the first flange 16 at the bottom of the intermediate connecting cylinder 15 and the second flange 17 on the strut 5 are connected, thereby realizing the stable connection between the square reinforcing node 6 and the strut 5.
[0032] As shown in Figures 5-6 , as a further embodiment of the present embodiment, the square reinforcing node 6 is connected with the diagonal cable through a rotatable structure; The rotatable structure is a pin shaft structure 20 or a ball hinge structure 21. The positional relationship between the square reinforcing node 6 and the diagonal cable has a rotational freedom in at least one direction.
[0033] As shown in Figures 7-8 As a further embodiment of the present embodiment, the rotatable structure is a ball hinge structure 21, which includes a first connecting part 22, a second connecting part 23, a hinge shell 24, and a hinge ball 25. The hinge ball 25 is fixedly arranged on the first connecting part 22, and the hinge shell 24 is fixedly arranged on the second connecting part 23. The hinge shell 24 is provided with an opening on the side of the hinge ball 25, the hinge ball 25 is freely rotatably embedded in the hinge shell 24, and the hinge ball 25 is connected with the first connecting part 22 through an intermediate connecting part extending out of the opening.
[0034] As shown in Figures 9-12 As a further embodiment of the present embodiment, the hinge ball 25 is an overall elliptical sphere, which includes a first elliptical hemisphere 26 and a second elliptical hemisphere 27 in sequence in the direction of the long axis. The first elliptical hemisphere 26 and the second elliptical hemisphere 27 are provided with guide holes 28, and connecting column pins 29 are arranged in the guide holes 28 to form a guide limiting structure. The connecting column pins 29 are further sleeved with springs 30, and the two ends of the springs 30 abut against the first elliptical hemisphere 26 and the second elliptical hemisphere 27 respectively, tending to force the first elliptical hemisphere 26 and the second elliptical hemisphere 27 to move away from each other.
[0035] As a further embodiment of the present embodiment, the hinge shell 24 is further wrapped with a fixed shell 31. The fixed shell 31 and the hinge shell 24 are further provided with an elastic layer 32 therebetween. The hinge shell 24 is provided with 3-6 slits at the opening, so as to form a plurality of elastic outwardly expandable and inwardly contractible petal-shaped parts at the opening of the hinge shell 24.
[0036] The two ellipsoids are provided with a gap in the initial state. When the relative movement between the cable and the chord occurs, the hinge ball 25 is driven to rotate in the hinge shell 24, and the gap between the two ellipsoids is reduced and the spring 30 is compressed, that is, the hinge ball 25 obtains more rotation space by reducing the size of the middle gap. As a boundary condition, when the gap between the two ellipsoids is 0 (that is, when the two ellipsoids abut), the major axis length of the hinge ball 25 is compressed to the minimum, and the maximum rotation amount is reached. At this time, the first ellipsoid 26 and the second ellipsoid 27 abut the inner wall of the hinge shell 24, and the hinge shell 24 prevents the first ellipsoid 26 and the second ellipsoid 27 from further rotating. Before this boundary condition, the hinge ball 25 can relatively freely rotate in the hinge shell 24 in a long-axis variable ellipsoidal structure between the initial state and the state where the two ellipsoids form an ellipsoid. In the process of rotation, the spring 30 continuously performs energy consumption through expansion and contraction. The above process mainly occurs when the building structure is subjected to conventional displacement under conventional load vibration. The hinge ball 25 freely rotates in the hinge shell 24 within a certain range, so that the cable and the chord have a certain degree of freedom. At the same time, the spring 30 can continuously dissipate energy. When the boundary condition is reached, the hinge ball 25 is locked with the hinge shell 24 to prevent further relative movement between the cable and the chord, thereby providing boundary resistance.
[0037] The above rotation process and boundary are the movement and energy dissipation mode when the relative movement between the cable and the chord occurs under general conditions. However, when a serious disaster such as an earthquake or a strong wind occurs, the structure will break through the above boundary and further deform. Specifically, after the two ellipsoids form an ellipsoid, the hinge ball 25 continues to rotate in the hinge shell 24, prying the end of the hinge shell 24 to cause elastic deformation of the metal and extrude the elastic layer 32. In this process, the elastic deformation of the end of the hinge shell 24 and the elastic deformation of the elastic layer 32 provide an energy dissipation function, and also provide a restoring force for the hinge ball 25 to return to the initial state. Specifically, the elastic layer 32 and the end of the hinge shell 24 abutting the hinge ball 25 provide a restoring force for the hinge ball 25 to return to the initial state through the lever effect. In the process of re-righting and repairing the device, the restoring force can make the hinge ball 25 return to the right position after a slight external force is applied, thereby facilitating rapid repair after a disaster and restoring urban infrastructure as soon as possible.
[0038] As shown in Figures 13-14 As a further embodiment of the present embodiment, the present embodiment provides two connection modes of the brace 5 and the first cable 33 and the second cable 34 (the first cable 33 and the second cable 34 are end cables 3 or intermediate cables 4).
[0039] The first connection mode is a double pin shaft structure 20, and the bottom end of the brace 5 is respectively connected with the first cable 33 and the second cable 34 through the pin shaft 35 on both sides.
[0040] The second connecting mode is a single pin shaft structure 20, a pin shaft is arranged at the bottom end of the strut 5, and the first diagonal cable 33 and the second diagonal cable 34 are pinned on the same pin shaft 35.
[0041] As shown in Figures 13-14 As a further embodiment of the present embodiment, a cable force adjuster is arranged on the end diagonal cable 3 and the intermediate diagonal cable 4, for adjusting the cable force of the end diagonal cable 3 and the intermediate diagonal cable 4.
[0042] On the other hand, the application also discloses a construction method of the fabricated reinforcing joint of the large-span pipe truss, comprising the following steps: S1: hoisting a square lower supporting part below the square tubular lower chord; S2: hoisting a square upper cover part above the square tubular lower chord, and connecting the square lower supporting part and the square upper cover part through high-strength bolts; S3: hoisting an intermediate connecting cylinder with a connecting slot plate and inserting and connecting the intermediate connecting cylinder upward with an upper connecting cylinder with a connecting plug plate, and fastening and connecting the connecting plug plate and the connecting slot plate through high-strength bolts; S4: hoisting a strut below the intermediate connecting cylinder, and connecting the first flange and the second flange through high-strength bolts; S5: hoisting a diagonal cable, and connecting the diagonal cable with the strut and the square reinforcing joint; S6: adjusting the cable force of each diagonal cable to a design value through a cable force adjuster.
[0043] By adopting the above technical scheme, the application has the following beneficial effects: (1) The chord and the strut-diagonal cable system are connected through the square reinforcing joint 6, compared with the traditional cylindrical chord, the relative rotation problem caused by the circular sleeve at the fixed joint is effectively avoided, and the stability of the overall structure in long-term use and in extreme conditions such as earthquakes and strong winds is improved.
[0044] (2) The square reinforcing joint 6 is composed of the square upper cover part 7 and the square lower supporting part 8, and is fastened through corresponding connecting holes by fasteners, so that installation is convenient; and the square upper cover part 7 adopts a segmented structure and can avoid the square tubular diagonal web 2, so that on-site construction is facilitated.
[0045] (3) The connecting joint 13 adopts a three-section structure, the upper connecting cylinder 14 and the intermediate connecting cylinder 15 are sleeved and connected through insertion and connected by fasteners, the intermediate connecting cylinder 15 and the strut 5 are connected through a flange structure, and stable connection between the square reinforcing joint 6 and the strut 5 is achieved.
[0046] (4) The square reinforced node 6 and the diagonal cable are connected through a rotatable structure (such as a spherical hinge structure 21), so that the two have at least one direction of rotational freedom. The hinge ball 25 composed of two ellipsoidal hemispheres in the spherical hinge structure 21 can rotate relatively freely within the hinge shell 24 under normal load vibration, the spring 30 consumes energy with expansion and contraction, and is locked to avoid further relative movement when the boundary condition is reached, providing boundary resistance capacity; in the event of a serious disaster, the hinge ball 25 prys the end of the hinge shell 24 and the elastic layer 32 deforms elastically, further consuming energy and providing a restoring force, which is conducive to rapid repair after the disaster.
[0047] (5) Two connection modes of the double-pin shaft structure 20 and the single-pin shaft structure 20 of the bracing strut 5 and the diagonal cable are provided, which can be flexibly selected according to actual needs, thereby enhancing the adaptability and flexibility of the structure.
[0048] (6) The cable force adjuster is arranged on the end diagonal cable 3 and the middle diagonal cable 4, which can adjust the cable force, facilitate adjustment of the structure stress according to actual conditions, and ensure the safety and stability of the structure.
[0049] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A prefabricated reinforcement node for a large-span tubular truss, characterized in that, This includes a square tube-shaped lower chord, a square tube-shaped diagonal web member, end diagonal cables, middle diagonal cables, and struts; The square tubular diagonal web member is wrapped with a square reinforcing node; The lower end of the square reinforcement node is connected to one end of the strut or the end diagonal cable; The other end of the end cable is connected to the lower end of the strut; The two ends of the intermediate inclined cable are respectively connected to the ends of two adjacent struts; The square reinforcement node includes a square upper cover and a square lower support; The square upper cover and the square lower support respectively wrap around the square tubular lower chord from the upper and lower sides; The square upper cover and the square lower support are respectively provided with a first connecting plate and a second connecting plate; The first connecting plate and the second connecting plate are respectively provided with first connecting holes for fasteners to pass through and be tightened.
2. The prefabricated reinforcement node for a large-span tubular truss according to claim 1, characterized in that, The square top cover is a segmented structure with a gap between the two segments to avoid the square tubular diagonal web member connected to the square tubular lower chord.
3. The prefabricated reinforcement node for a large-span tubular truss according to claim 1, characterized in that, The square lower support is also provided with a self-locking surface at its end. The self-locking surface is provided with three-dimensional texture to increase the friction between the square lower support and the square tubular lower chord.
4. The prefabricated reinforcement node for a large-span tubular truss according to claim 1, characterized in that, A connection node is provided between the reinforcing node and the support rod; The connection node includes an upper connecting cylinder and a middle connecting cylinder; The upper connecting cylinder is fixedly connected to the square reinforcing node; The upper connecting cylinder and the middle connecting cylinder are provided with insertion connecting pairs, and are connected by the insertion connecting pairs; The intermediate connecting cylinder and the support rod are respectively provided with a first flange and a second flange at their opposite ends; The first flange and the second flange are connected by fasteners, thereby connecting the strut to the intermediate connecting cylinder.
5. The prefabricated reinforcement node for a large-span tubular truss according to claim 1, characterized in that, The insertion connection pair includes a connecting insert plate provided on the upper connecting cylinder and a connecting groove plate provided on the middle connecting cylinder; Multiple connecting plates are fixedly arranged in a circumferential array on the outer wall of the upper connecting cylinder; The connecting slot plates are arranged in pairs in parallel. Multiple pairs of connecting groove plates are fixedly arranged in a circumferential array on the outer wall of the intermediate connecting cylinder; A gap is provided between the pair of connecting slot plates, and the gap is greater than or equal to the thickness of the connecting insert plate; The inner diameter of the intermediate connecting cylinder is greater than or equal to the outer diameter of the upper connecting cylinder; The upper connecting cylinder and the connecting insert plate are inserted into the area enclosed by the middle connecting cylinder and the connecting groove plate.
6. The prefabricated reinforcement node for a large-span tubular truss according to claim 1, characterized in that, The square reinforcing node is connected to the inclined cable via a rotatable structure; The rotatable structure is a pin structure or a ball joint structure; The positional relationship between the square reinforcement node and the inclined cable has at least one degree of rotational freedom in a direction.
7. The prefabricated reinforcement node for a large-span tubular truss according to claim 1, characterized in that, The rotatable structure is a ball joint structure, including a first connecting part, a second connecting part, a hinge shell, and a hinge ball; The hinge ball is fixedly disposed on the first connecting part, and the hinge shell is fixedly disposed on the second connecting part; The hinge housing has an opening on one side of the hinge ball, and the hinge ball is rotatably fitted into the hinge housing. The hinge ball extends out of the opening through an intermediate connecting part and connects to the first connecting part.
8. The prefabricated reinforcement node for a large-span tubular truss according to claim 1, characterized in that, The hinge sphere is an ellipsoid in shape, and its major axis includes a first ellipsoid and a second ellipsoid in sequence. The first and second ellipsoidal hemispheres are provided with guide holes, and connecting pins are provided in the guide holes to form a guide and limiting structure; A spring is also fitted outside the connecting pin. The two ends of the spring abut against the first ellipsoid and the second ellipsoid, respectively, tending to force the first ellipsoid and the second ellipsoid away from each other.
9. The prefabricated reinforcement node for a large-span tubular truss according to claim 1, characterized in that, The hinge shell is also enclosed by a fixed shell. An elastic layer is also provided between the fixed housing and the hinge housing; The hinge opening has 3-6 slits, which allows the hinge to form multiple petal-shaped parts that can elastically open outward and retract inward at the opening.
10. A construction method for a prefabricated reinforcement node of a large-span tubular truss as described in any one of claims 1-9, comprising the steps of: S1: Hoist the square lower support to below the square tube lower chord; S2: Hoist the square top cover to the top of the square tube lower chord, and connect the square lower support to the square top cover with high-strength bolts; S3: Hoist the intermediate connecting cylinder with the connecting groove plate and insert it upwards into the upper connecting cylinder with the connecting insert plate, and fasten the connecting insert plate to the connecting groove plate with high-strength bolts; S4: Hoist the support rod to the bottom of the intermediate connecting cylinder and connect the first flange and the second flange with high-strength bolts; S5: Hoist the inclined cable and connect the inclined cable to the strut and square reinforcement node; S6: Adjust the cable tension regulator to ensure that the cable tension of each cable reaches the design value.