Truss bridge node supporting device and truss bridge

Abstract

The invention provides a truss bridge node supporting device and a truss bridge. The truss bridge node supporting device comprises an upper bearing plate, a lower bearing plate, a corrugated metal plate, a first arc-shaped plate and a second arc-shaped plate. The upper bearing plate is detachably connected with a node of the truss bridge, and the two ends of the corrugated metal plate are fixedly connected with the upper bearing plate and the lower bearing plate respectively; the first arc-shaped plate and the second arc-shaped plate have the same structure and are U-shaped metal plates with openings; the upper end and the lower end of the second arc-shaped plate are fixedly connected with the upper bearing plate and the lower bearing plate correspondingly. Wherein the first arc-shaped plate, the second arc-shaped plate and the corrugated metal plate jointly support nodes of the upper bearing plate and the truss bridge, and the lower bearing plate is relatively fixed to the ground or the bridge floor. According to the truss bridge node supporting device, reliable supporting of the truss bridge node is achieved, and the truss bridge node supporting device can be replaced in time when rusted; according to the mechanical design of the overall structure, the safety and durability of the structure are considered, and economical efficiency and practicability are also considered.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge node support equipment, and in particular to a truss bridge node support device and a truss bridge. Background Art

[0002] Steel truss trestles are widely used in bridge engineering and road engineering, mainly in many fields such as bridge construction, road construction and mine construction; the nodes of the bridge structure refer to the intersections that connect the various components in the bridge structure (for example: two support beams are arranged in a V shape, and the intersection of the V shape is the node position); the nodes are very important parts of the bridge structure because they are responsible for transmitting and dispersing loads to ensure the overall stability and safety of the bridge. Bridge nodes are subject to large forces under the action of external forces such as earthquakes, wind, vehicles, and pedestrians. Each node may produce large deformations. Therefore, the mechanical properties of the bridge nodes directly affect the bearing capacity and service life of the entire steel truss trestles.

[0003] Nodes formed by welded steel pipes are widely used in bridge engineering as connection parts in steel truss structures. According to the cross-sectional form of the connecting rods, nodes are commonly formed by steel pipes with circular or rectangular cross-sections. Among them, compared with circular steel pipe nodes, nodes formed by steel pipes with rectangular cross-sections have straight cutting of the rods at the intersection line of the nodes, and the node structure is relatively simple, which makes it easy to ensure the welding quality, and therefore is widely used.

[0004] However, the nodes formed by existing welded steel pipes are usually the weak link in bridge design. Affected by the coupling of many factors such as the environment, load conditions, geometric dimensions and structural details, the steel pipe nodes are prone to fatigue damage and deterioration, thereby affecting the durability and safety of the overall bridge structure. In addition, the nodes formed by existing welded steel pipes have poor bearing capacity. At the same time, they are prone to rust during long-term use and cannot be replaced after rusting, which is not conducive to subsequent anti-corrosion treatment and subsequent node reinforcement. The rusted steel pipes will also weaken the bearing capacity of the nodes, resulting in poor overall durability of the bridge structure and seriously reducing the overall safety performance of the bridge structure. Summary of the invention

[0005] The invention provides a truss bridge node support device and a truss bridge, so as to solve the problem in the prior art that the nodes formed by welded steel pipes have poor bearing capacity and cannot be replaced after being corroded.

[0006] In order to solve the above problems, according to one aspect of the present invention, a truss bridge node support device is provided, comprising: an upper bearing plate, a lower bearing plate, a corrugated metal plate, a first curved plate, and a second curved plate; the upper bearing plate is detachably connected to the node of the truss bridge, and the two ends of the corrugated metal plate are respectively fixedly connected to the upper bearing plate and the lower bearing plate, and the corrugated metal plate is a wavy metal plate; the first curved plate and the second curved plate have the same structure, and are both U-shaped metal plates with openings; the opening of the first curved plate faces one side of the upper bearing plate in the horizontal direction, and the upper and lower ends of the first curved plate are respectively fixedly connected to the upper bearing plate and the lower bearing plate The first curved plate is connected to the upper bearing plate in the horizontal direction; the opening of the second curved plate faces the other side of the upper bearing plate in the horizontal direction, and the upper and lower ends of the second curved plate are fixedly connected to the upper bearing plate and the lower bearing plate respectively; wherein the first curved plate, the second curved plate and the corrugated metal plate jointly support the node of the upper bearing plate and the truss bridge, and the lower bearing plate is relatively fixed to the ground or the bridge deck; the upper bearing plate and the lower bearing plate are arranged in parallel; the center line of the upper bearing plate and the center line of the lower bearing plate is taken as the center line, and the center line is arranged vertically; the planes which are respectively perpendicular to the upper bearing plate and the lower bearing plate and contain the center line are taken as the reference plane, and the first curved plate and the second curved plate are arranged symmetrically relative to the reference plane.

[0007] Furthermore, the upper bearing plate, the lower bearing plate, the corrugated metal plate, the first curved plate and the second curved plate are projected from top to bottom along the direction of gravity, and the projection of the upper bearing plate coincides with the projection of the lower bearing plate; the projection of the corrugated metal plate, the projection of the first curved plate and the projection of the second curved plate are respectively located within the projection of the lower bearing plate.

[0008] Furthermore, the projection of the first curved plate is set as the first projection, the projection of the second curved plate is set as the second projection, and the projection of the corrugated metal plate is set as the third projection; the first projection, the second projection and the third projection are all rectangular and are respectively arranged in parallel; wherein, there are at least two corrugated metal plates, the distance between the third projection of the corrugated metal plate closest to the first curved plate and the first projection is not less than 20 mm, the distance between the third projection of the corrugated metal plate closest to the second curved plate and the second projection is not less than 20 mm, and at least two corrugated metal plates are arranged in parallel and spaced apart.

[0009] Furthermore, the upper bearing plate, the lower bearing plate, the corrugated metal plate, the first curved plate and the second curved plate are all made of alloy steel plate materials; the truss bridge node support device also includes a carrying assembly, the carrying assembly includes a plurality of rollers, two fixed rails and a stopper, the plurality of rollers are spaced apart at the bottom of the lower bearing plate to jointly carry the lower bearing plate; the fixed rails are fixed relative to the ground or the bridge deck, the two fixed rails are spaced apart, and are respectively matched with the roller limiters to jointly carry the rollers and constrain the rollers to move below the node of the truss bridge; the stopper is fixed relative to the ground or the bridge deck to stop the rollers.

[0010] Furthermore, the truss bridge node support device also includes two groups of support components, one group of support components includes multiple support springs and a floating track, one end of the support spring is fixedly connected to the ground or the bridge deck, and the other end is connected to the floating track; multiple support springs are arranged at intervals along the extension direction of the floating track to jointly support the floating track; the floating track is arranged at one end of the fixed track close to the stop block; the floating tracks in the two groups of support components respectively cooperate with a fixed track; wherein, there are four rollers under the lower bearing plate, distributed at the four corners of the lower bearing plate; the two rollers located on one side of the lower bearing plate first and simultaneously move from the two fixed tracks to the two floating tracks, and at the same time press down the two floating tracks, and move along the floating tracks, after the two rollers move simultaneously to lose contact with the two floating tracks, the multiple support springs of the two groups of support components drive the floating track to rise to abut against the bottom of the lower bearing plate, which is used to support the lower bearing plate and stop the movement of the two rollers located on the other side of the lower bearing plate.

[0011] Furthermore, the truss bridge node support device also includes four connecting blocks, which are fixedly arranged on the four corners of the upper bearing plate; there are four rollers under the lower bearing plate, which are distributed at the four corners of the lower bearing plate; the connecting blocks are detachably connected to the nodes of the truss bridge by screws, so that the upper bearing plate supports the nodes of the truss bridge; wherein, the four connecting blocks correspond to the four rollers one by one, forming four bearing groups; within the same bearing group, projected from top to bottom along the direction of gravity, the projection of the connecting blocks at least partially overlaps with the projection of the rollers.

[0012] Furthermore, the corrugated metal plate extends according to the cosine function law, the formula of the cosine function law is y=A·cos(ωx), A is the amplitude, and the value of A is not less than 6mm, the period T=2π / ω, and the value of T is 0~4π.

[0013] Furthermore, the U-shaped metal plate extends along a parabolic function, and the formula for the parabolic function is y 2 =2px, and the opening of the parabola points to the positive direction of the X-axis, p is the distance from the focus to the directrix, and the value of p is not less than 10mm.

[0014] Furthermore, the outer surfaces of the upper bearing plate, the lower bearing plate, the corrugated metal plate, the first curved plate and the second curved plate are all electroplated with an anti-rust metal layer to prevent rust and corrosion; and / or, the outer surfaces of the upper bearing plate, the lower bearing plate, the corrugated metal plate, the first curved plate and the second curved plate are all coated with an epoxy resin layer to prevent rust and corrosion.

[0015] According to another aspect of the present invention, a truss bridge is provided, the truss bridge comprising the above-mentioned truss bridge node support device, the truss bridge also comprising a first support member and a second support member, the extension direction of the first support member is cross-arranged with the extension direction of the second support member, and the first support member is respectively detachably connected to an upper bearing plate of a truss bridge node support device, so that the two truss bridge node support devices respectively support the first support member and the second support member; wherein the outer surfaces of the first support member and the second support member are coated with an epoxy resin layer to prevent rust and corrosion.

[0016] Applying the technical solution of the present invention, the present invention provides a truss bridge node support device, comprising: an upper bearing plate, a lower bearing plate, a corrugated metal plate, a first curved plate, and a second curved plate; the upper bearing plate is detachably connected to the node of the truss bridge, and the two ends of the corrugated metal plate are respectively fixedly connected to the upper bearing plate and the lower bearing plate, and the corrugated metal plate is a wavy metal plate; the first curved plate and the second curved plate have the same structure, and are both U-shaped metal plates with openings; the opening of the first curved plate faces one side of the upper bearing plate in the horizontal direction, and the upper and lower ends of the first curved plate are respectively fixedly connected to the upper bearing plate and the lower bearing plate; the first curved plate and the second curved plate have the same structure, and are both U-shaped metal plates with openings; the opening of the first curved plate faces one side of the upper bearing plate in the horizontal direction, and the upper and lower ends of the first curved plate are respectively fixedly connected to the upper bearing plate and the lower bearing plate; The opening of the second arc plate faces the other side of the upper bearing plate in the horizontal direction, and the upper and lower ends of the second arc plate are fixedly connected to the upper bearing plate and the lower bearing plate respectively; wherein the first arc plate, the second arc plate and the corrugated metal plate jointly support the node of the upper bearing plate and the truss bridge, and the lower bearing plate is relatively fixed to the ground or the bridge deck; the upper bearing plate and the lower bearing plate are arranged in parallel; the center line is taken as the center line, and the center line is arranged vertically; the planes which are respectively perpendicular to the upper bearing plate and the lower bearing plate and contain the center line are taken as the reference plane, and the first arc plate and the second arc plate are arranged symmetrically relative to the reference plane.

[0017] The present invention not only realizes reliable support for the truss bridge node, but also can timely replace the truss bridge node support device when it is corroded by arranging the upper bearing plate, the lower bearing plate, the corrugated metal plate, the first curved plate and the second curved plate to work together; by setting the specific shape of the corrugated metal plate, the corrugated metal plate can absorb various forces at the node and dissipate the energy of the force by changing its curvature; by arranging the first curved plate and the second curved plate to be U-shaped metal plates with openings, the U-shaped metal plate can absorb various forces at the node and dissipate the energy of the force by changing the opening angle, thereby effectively improving the overall bearing capacity of the truss bridge node support device for the force at the node, effectively bearing the node and restraining the deformation of the truss bridge node when subjected to force, thereby improving the bearing capacity and durability of the node; at the same time When the truss bridge node support device is found to be rusted, the severely corroded structure can be replaced in a timely manner to achieve local reinforcement of the truss bridge; in addition, the present invention can not only effectively improve the mechanical properties of the nodes of the existing steel trestle structure through the coordinated use of corrugated metal plates and U-shaped metal plates, but also play a good energy dissipation role in natural disasters such as earthquakes, thereby reducing the damage to the bridge structure; the mechanical design of the overall structure of the present invention not only takes into account the safety and durability of the structure, but also takes into account the economy and practicality, and has a significant effect on improving the comprehensive mechanical properties of the existing steel trestle structure, and is suitable for the construction and maintenance of steel trestle structures in a variety of environments and conditions, and has a wide range of engineering application value. The present invention is low in cost, easy to assemble and subsequently maintain and replace, and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A partial structural schematic diagram of a truss bridge node support device provided by an embodiment of the present invention is shown;

[0020] Figure 2 A perspective view showing the cooperation between the truss bridge node support device and the truss bridge provided by an embodiment of the present invention;

[0021] Figure 3 A partial structural perspective view of a truss bridge node support device provided by the first embodiment of the present invention is shown;

[0022] Figure 4 A partial structural perspective view of a truss bridge node support device provided by a second embodiment of the present invention is shown;

[0023] Figure 5 A partial structural perspective view of a truss bridge node support device provided by a third embodiment of the present invention is shown;

[0024] Figure 6 A perspective view showing the cooperation between the truss bridge node support device provided by an embodiment of the present invention and the truss bridge at another angle is shown;

[0025] Figure 7 A function curve diagram of a cosine function law provided by an embodiment of the present invention is shown;

[0026] Figure 8 A function curve diagram of a parabolic function law provided by an embodiment of the present invention is shown;

[0027] Fig. 9 A schematic diagram showing the deformation of various structures of the truss bridge node support device provided by an embodiment of the present invention when subjected to tension;

[0028] Fig.10 A schematic diagram showing the deformation of various structures of the truss bridge node support device provided by an embodiment of the present invention when subjected to pressure;

[0029] Fig.11 A schematic diagram showing the deformation of various structures of the truss bridge node support device provided by an embodiment of the present invention when subjected to shear force;

[0030] Fig.12 The mechanical distribution diagram of each structure of the truss bridge node support device when subjected to tension, calculated using finite element analysis technology, is shown;

[0031] Fig.13 The mechanical distribution diagram of each structure of the truss bridge node support device under pressure calculated by finite element analysis technology is shown;

[0032] Fig.14 The figure shows the mechanical distribution diagram of each structure of the truss bridge node support device when subjected to shear force, which is calculated using finite element analysis technology.

[0033] The above drawings include the following reference numerals:

[0034] 10. Upper load-bearing plate;

[0035] 20. Lower bearing plate;

[0036] 30. Corrugated metal sheet;

[0037] 40. A first curved plate;

[0038] 50. second curved plate;

[0039] 60. Carrying assembly; 61. Roller; 62. Fixed track; 63. Stopper;

[0040] 70. Support assembly; 71. Support spring; 72. Floating track;

[0041] 80. Connecting block;

[0042] 90. A first support member;

[0043] 100. A second supporting member. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] like Figures 1 to 14 As shown, an embodiment of the present invention provides a truss bridge node support device, comprising: an upper bearing plate 10, a lower bearing plate 20, a corrugated metal plate 30, a first curved plate 40 and a second curved plate 50; the upper bearing plate 10 is detachably connected to the node of the truss bridge, and the two ends of the corrugated metal plate 30 are respectively fixedly connected to the upper bearing plate 10 and the lower bearing plate 20, and the corrugated metal plate 30 is a wavy metal plate; the first curved plate 40 and the second curved plate 50 have the same structure, and are both U-shaped metal plates with openings; the opening of the first curved plate 40 faces one side of the upper bearing plate 10 in the horizontal direction, and the upper and lower ends of the first curved plate 40 are respectively fixedly connected to the upper bearing plate 10 and the lower bearing plate 20; The opening of the plate 50 faces the other side of the upper bearing plate 10 in the horizontal direction, and the upper and lower ends of the second curved plate 50 are fixedly connected to the upper bearing plate 10 and the lower bearing plate 20 respectively; wherein, the first curved plate 40, the second curved plate 50 and the corrugated metal plate 30 jointly support the node between the upper bearing plate 10 and the truss bridge, and the lower bearing plate 20 is relatively fixed to the ground or the bridge deck; the upper bearing plate 10 and the lower bearing plate 20 are arranged in parallel; the center line of the upper bearing plate 10 and the center line of the lower bearing plate 20 is taken as the center line, and the center line is arranged vertically; with the planes which are respectively perpendicular to the upper bearing plate 10 and the lower bearing plate 20 and contain the center line as the reference plane, the first curved plate 40 and the second curved plate 50 are arranged symmetrically relative to the reference plane.

[0046] The present invention not only realizes reliable support for the truss bridge node, but also can replace the truss bridge node support device in time when it is corroded by arranging the upper bearing plate 10, the lower bearing plate 20, the corrugated metal plate 30, the first curved plate 40 and the second curved plate 50 to cooperate with each other; by setting the specific shape of the corrugated metal plate 30, the corrugated metal plate 30 can absorb various forces at the node and dissipate the energy of the force by changing its curvature; by arranging the first curved plate 40 and the second curved plate 50 to be U-shaped metal plates with openings, the U-shaped metal plates can absorb various forces at the node and dissipate the energy of the force by changing the opening angle, thereby effectively improving the overall bearing capacity of the truss bridge node support device for the force at the node, effectively bearing the node and restraining the deformation of the truss bridge node when subjected to force, thereby improving the bearing capacity of the node and Durability of use; at the same time, when it is found that the node support device of the truss bridge is corroded, the severely corroded structure can be replaced in a comprehensive manner in time to achieve local reinforcement of the truss bridge; in addition, the present invention can not only effectively improve the mechanical properties of the nodes of the existing steel trestle structure through the coordinated use of the corrugated metal plate 30 and the U-shaped metal plate, but also play a good energy consumption role in natural disasters such as earthquakes, and reduce the damage to the bridge structure; the mechanical design of the overall structure of the present invention not only takes into account the safety and durability of the structure, but also takes into account the economy and practicality, and has a significant effect on improving the comprehensive mechanical properties of the existing steel trestle structure, is suitable for the construction and maintenance of steel trestle structures in a variety of environments and conditions, and has a wide range of engineering application value. The present invention is low in cost, easy to assemble and subsequent maintenance and replacement, and is suitable for large-scale promotion and use.

[0047] like Figure 1 , Figure 2 and Figure 6 As shown, the upper bearing plate 10, the lower bearing plate 20, the corrugated metal plate 30, the first curved plate 40 and the second curved plate 50 are projected from top to bottom along the direction of gravity, and the projection of the upper bearing plate 10 coincides with the projection of the lower bearing plate 20; the projection of the corrugated metal plate 30, the projection of the first curved plate 40 and the projection of the second curved plate 50 are respectively located within the projection of the lower bearing plate 20.

[0048] This arrangement allows the upper bearing plate 10, the lower bearing plate 20, the corrugated metal plate 30, the first curved plate 40 and the second curved plate 50 to better share and evenly deform when bearing the up and down forces transmitted from the node position, and the overall force transmission consistency is better.

[0049] Specifically, the projection of the first curved plate 40 is set as the first projection, the projection of the second curved plate 50 is set as the second projection, and the projection of the corrugated metal plate 30 is set as the third projection; the first projection, the second projection and the third projection are all rectangular and are respectively arranged in parallel; wherein, there are at least two corrugated metal plates 30, the distance between the third projection of the corrugated metal plate 30 closest to the first curved plate 40 and the first projection is not less than 20 mm, the distance between the third projection of the corrugated metal plate 30 closest to the second curved plate 50 and the second projection is not less than 20 mm, and at least two corrugated metal plates 30 are arranged in parallel and spaced apart.

[0050] This arrangement ensures that the first curved plate 40, the second curved plate 50 and the plurality of corrugated metal plates 30 will not generate motion interference with each other during deformation, further ensuring reliable bearing of the node.

[0051] It should be noted that: in actual application, it is found that after the steel trestle node is corroded and loaded, the damage is often concentrated at the node, such as brittle damage; a truss bridge node support device is set at the node as a support and energy-absorbing structure to consume the pressure, tension and lateral shear force at the node to avoid brittle damage and deformation at the node; the present invention is designed to be a metal energy-absorbing support that can resist tension, pressure and shear force, which includes 2 corrugated metal plates 30, 2 U-shaped metal plates (i.e., a first curved plate 40 and a second curved plate 50), an upper bearing plate 10 and a lower bearing plate 20, wherein the corrugated metal plate 30 is spaced 20 mm from the U-shaped metal plate, and is welded and fixed to the upper bearing plate 10 and the lower bearing plate 20 respectively, and the curvature of the corrugated metal plate 30 and the thickness of the U-shaped metal plate can be adjusted according to the actual stress conditions at the node, and when the truss bridge node support device is severely damaged by force but the node is not severely damaged, it can be replaced by itself to extend the service life of the node.

[0052] like Figure 1 , Figure 2 and Figure 6 As shown, the upper bearing plate 10, the lower bearing plate 20, the corrugated metal plate 30, the first curved plate 40 and the second curved plate 50 are all made of alloy steel plate materials; the truss bridge node support device also includes a carrying assembly 60, the carrying assembly 60 includes a plurality of rollers 61, two fixed rails 62 and a stopper 63, the plurality of rollers 61 are spaced apart at the bottom of the lower bearing plate 20 to jointly support the lower bearing plate 20; the fixed rails 62 are fixedly arranged relative to the ground or the bridge deck, the two fixed rails 62 are spaced apart, and are respectively limitedly cooperated with the rollers 61 to jointly support the rollers 61 and constrain the rollers 61 to move below the node of the truss bridge; the stopper 63 is fixedly arranged relative to the ground or the bridge deck to stop the rollers 61.

[0053] By setting up a transport assembly 60 including multiple rollers 61, two fixed rails 62 and a stop block 63, convenient transportation of the entire truss bridge node support device is achieved. By setting the fixed rails 62 and the stop block 63 in advance at the position where the node needs to be supported, the truss bridge node support device can be pushed to move to the designated support installation position as a whole, thereby achieving rapid support for the node and facilitating the subsequent replacement of rusted truss bridge node support devices.

[0054] like Figure 1 , Figure 2 and Figure 6 As shown, the truss bridge node support device also includes two groups of support components 70, one group of support components 70 includes a plurality of support springs 71 and a floating track 72, one end of the support spring 71 is fixedly connected to the ground or the bridge deck, and the other end is connected to the floating track 72; the plurality of support springs 71 are arranged at intervals along the extension direction of the floating track 72 to jointly support the floating track 72; the floating track 72 is arranged at one end of the fixed track 62 close to the stopper 63; the floating tracks 72 in the two groups of support components 70 are respectively matched with a fixed track 62; wherein, the lower bearing plate 20 below There are four rollers 61 distributed at the four corners of the lower bearing plate 20; the two rollers 61 located on one side of the lower bearing plate 20 first and simultaneously move from the two fixed rails 62 to the two floating rails 72, and at the same time press down the two floating rails 72 and move along the floating rails 72. After the two rollers 61 simultaneously move to be out of contact with the two floating rails 72, the multiple support springs 71 of the two groups of support assemblies 70 drive the floating rails 72 to rise so as to abut against the bottom of the lower bearing plate 20, so as to support the lower bearing plate 20 and stop the movement of the two rollers 61 located on the other side of the lower bearing plate 20.

[0055] By setting up multiple support springs 71 and floating rails 72 to work together, the reliable constraint and bearing of the overall movement of the truss bridge node support device is guaranteed, and the overall limitation and support fixation of the truss bridge node support device is achieved with a simple structure, thereby ensuring the reliability of the node support; in addition, the multiple support springs 71 also further enhance the support strength of the node.

[0056] like Figure 1 , Figure 2 and Figure 6As shown, the truss bridge node support device also includes four connecting blocks 80, and the four connecting blocks 80 are fixedly arranged on the four corners of the upper bearing plate 10; there are four rollers 61 below the lower bearing plate 20, which are distributed at the four corners of the lower bearing plate 20; the connecting blocks 80 are detachably connected to the nodes of the truss bridge by means of screw connections, so that the upper bearing plate 10 supports the nodes of the truss bridge; wherein, the four connecting blocks 80 correspond one-to-one to the four rollers 61, forming four bearing groups; within the same bearing group, projected from top to bottom along the direction of gravity, the projection of the connecting blocks 80 at least partially overlaps with the projection of the rollers 61.

[0057] By setting up four connecting blocks 80, the upper bearing plate 10 can be detachably connected to the node of the truss bridge by means of screw connection; by being set in the same bearing group, projected from top to bottom along the direction of gravity, the projection of the connecting block 80 and the projection of the roller 61 at least partially overlap, ensuring that the force transmitted by the node at the position of the connecting block 80 can be smoothly transmitted to the corresponding roller 61, ensuring that the overall structure is subjected to uniform and reasonable force.

[0058] In a specific embodiment of the present invention, the upper bearing plate 10 and the trapezoidal stopper 63 are connected by welding or pinning. This connection method is more secure and can withstand greater external force impacts. It is suitable for steel trestles for heavy vehicles to pass through. The stability of welding and pinning ensures the structural safety of the bridge when it withstands the passage of heavy vehicles. It is suitable for areas with frequent heavy transportation such as mines and heavy industrial areas, and can effectively ensure the smooth and safe passage of the bridge.

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, the corrugated metal plate 30 extends according to the cosine function law, the formula of the cosine function law is y=A·cos(ωx), A is the amplitude, and the value of A is not less than 6mm, the period T=2π / ω, and the value of T is 0~4π.

[0060] By setting the geometric shape of the corrugated metal plate 30 to be expressed by a cosine function, this design can more effectively utilize materials and improve energy dissipation efficiency, and is particularly suitable for the construction of steel trestles in earthquake-prone areas. The corrugated metal plate 30 designed based on a mathematical function can provide more stable and efficient energy dissipation, effectively reducing earthquake damage to bridge structures and ensuring the safety of lifeline projects such as bridges.

[0061] like Figure 3 , Figure 4 and Figure 5As shown, in the first embodiment of the present invention, the corrugated metal plate 30 includes three continuous arc segments (i.e., function segments of one and a half cycles of the cosine function), in the second embodiment of the present invention, the corrugated metal plate 30 includes four continuous arc segments (i.e., function segments of two and a half cycles of the cosine function), and in the third embodiment of the present invention, the corrugated metal plate 30 includes five arc segments (i.e., function segments of two and a half cycles of the cosine function). The more the continuous arc segments are, the more sensitive it is to the force changes in the up and down directions. Therefore, the specific shape of the corrugated metal plate 30 can be flexibly selected according to actual use requirements to improve applicability.

[0062] like Figure 1 , Figure 2 , Figure 6 and Figure 8 As shown, the U-shaped metal plate extends along the parabolic function law, and the formula of the parabolic function law is y 2 =2px, and the opening of the parabola points to the positive direction of the X-axis, p is the distance from the focus to the directrix, and the value of p is not less than 10mm.

[0063] This arrangement not only ensures that the bearing capacity of the U-shaped metal plate meets actual requirements, but also makes the structure of the U-shaped metal plate lighter.

[0064] Now, the specific process and principle of overall force analysis and design in the present invention are described in detail as follows:

[0065] 1. Energy dissipation principle of the corrugated metal plate 30:

[0066] The design of the corrugated metal sheet 30 uses a cosine function, such as Figure 7 As shown, the expression is as follows:

[0067] y = A·cos(ωx), where A is the amplitude, which is 6 mm. The period T = 2π / ω, which is 4π.

[0068] When the truss bridge node support device is compressed, the curvature of the corrugated metal plate 30 becomes smaller (e.g. Fig.10 As shown in the figure, the amplitude A becomes larger and the period T becomes smaller, that is, the energy consumption of the corrugated metal plate 30 reaches the maximum value, and it can absorb and dissipate most of the energy transmitted from the upper bearing plate 10 to the corrugated metal plate 30, achieving a better energy consumption effect; when the truss bridge node support device is pulled, the curvature of the corrugated metal plate 30 becomes larger, close to the state of being straightened (as shown in the figure). Fig. 9 As shown), the amplitude A becomes smaller and the period T increases, that is, the energy consumption of the corrugated metal plate 30 reaches the limit value, and the corrugated metal plate 30 can no longer continue to deform and absorb energy. If the corrugated metal plate 30 undergoes permanent deformation (for example, brittle deformation) at this time, it is necessary to replace the truss bridge node support device to achieve better energy consumption effect.

[0069] 2. Energy dissipation principle of U-shaped metal plate:

[0070] The U-shaped metal plate is designed using a parabolic function, such as Figure 8 As shown, the expression is as follows (taking the parabola opening to the right as an example, the same is true for the parabola opening to the left):

[0071] y 2 =2px(p>0)(opening to the right), where p is the distance from the focus to the directrix, which is 10mm;

[0072] When the truss bridge node support device is compressed, the opening angle of the U-shaped metal plate becomes smaller (e.g. Fig.10 As shown in the figure), the focal length p becomes smaller, that is, the energy consumption of the U-shaped metal plate reaches the maximum value, which can absorb and dissipate most of the energy transmitted from the bearing plate 10 on the truss bridge node support device to the U-shaped metal plate, achieving a better energy consumption effect; when the truss bridge node support device is pulled, the opening angle of the U-shaped metal plate becomes larger, reaching the ultimate tensile state (as shown in the figure); ... U-shaped metal plate opening angle becomes larger, reaching the ultimate tensile state (as shown in the figure); when the truss bridge node support device is pulled, the U-shaped metal plate opening angle becomes larger, reaching the ultimate tensile state (as shown in the figure); when the truss bridge node support device is pulled, the U-shaped metal plate opening angle becomes larger, reaching the ultimate Fig. 9 As shown in the figure, the focal length p becomes larger, that is, the energy consumption of the U-shaped metal plate reaches the limit value, and the U-shaped metal plate can no longer continue to deform and absorb energy. At this time, the truss bridge node support device needs to be replaced to achieve a better energy consumption effect.

[0073] 3. Overall energy dissipation principle of truss bridge node support device:

[0074] When the truss bridge node support device is under tension as a whole: Fig. 9 The figure shows the deformation diagram of the truss bridge node support device after being pulled. The working principle is as follows: when the original truss bridge node support device is pulled, the corrugated metal plate 30 and the U-shaped metal plate dissipate energy by stretching, and the truss bridge node support device is deformed in the longitudinal direction; Fig. 9 The truss bridge node support device shown bears a vertical upward load, and the upper bearing plate 10 and the lower bearing plate 20 of the truss bridge node support device undergo slight deformation along the tensile direction. The internal U-shaped metal plate and the corrugated metal plate 30 dissipate energy through bending deformation. The corrugated metal plate 30 is stretched into an approximately vertical metal plate, and the U-shaped metal plate changes from a semicircular arc shape to an irregular semi-elliptical shape.

[0075] When the truss bridge node support device is under overall compression: Fig.10 The figure shows the deformation of the truss bridge node support device after being compressed. The working principle is as follows: when the truss bridge node support device is compressed, the corrugated metal plate 30 and the U-shaped metal plate are deformed outward to dissipate energy. When the corrugated metal plate 30 and the U-shaped metal plate are squeezed and bulged outward, the corrugated metal plate 30 and the U-shaped metal plate will fit together, making the corrugated metal plate 30 and the U-shaped metal plate a whole and better playing the role of energy dissipation. Fig.10As shown, when the upper bearing plate 10 contacts the corrugated metal plate 30, the double corrugated metal plate 30, as the main bearing structure, will first have an initial peak force. As the loading displacement increases, the double corrugated metal plate 30 and the double U-shaped metal plate work together to bend downward to resist the load, the bearing capacity of the structure decreases, and the force displacement curve decreases and enters the platform section; the deformation of the corrugated metal plate 30 continues to increase, and the period continues to decrease. At this time, as the loading displacement increases, the stress begins to increase rapidly, and the truss bridge node support device loses its bearing capacity.

[0076] When the truss bridge node support device is subjected to shear force as a whole: Fig.11 The figure shows the deformation of the truss bridge node support device after being subjected to shear force. The working principle is as follows: when the original truss bridge node support device is subjected to shear force, the transverse shear force causes the corrugated metal plate 30 and the U-shaped metal plate to deform transversely, so that the truss bridge node support device is connected as a whole to play an energy dissipation role. Fig.11 As shown, under the action of shear load, the upper bearing plate 10 and the lower bearing plate 20 of the truss bridge node support device together with the U-shaped metal plate in the direction of load application undergo large irregular deformation, and the internal U-shaped metal plate and the corrugated metal plate 30 undergo a slight displacement along the direction of the shear load, separate from the upper bearing plate 10 and the lower bearing plate 20 and deform; the distance between the double U-shaped metal plate and the double corrugated metal plate 30 continues to shrink under the action of shear, jointly resisting the shear load and dissipating energy.

[0077] Finite element calculation and simulation experiment were carried out on the deformation of the truss bridge node support device. That is, the finite element simulation method was used to perform quasi-static tension, compression and shear calculation on the truss bridge node support device to study its deformation behavior and energy absorption capacity. The specific calculation results are as follows:

[0078] 1. When the truss bridge node support device is subjected to tension:

[0079] like Fig.12 As shown, the upper bearing plate 10 of the truss bridge node support device is subjected to a vertical upward load, the load is a displacement of 50 mm, the lower bearing plate 20 of the truss bridge node support device is fixed, the upper bearing plate 10 of the truss bridge node support device has not been deformed, the internal U-shaped metal plate, the corrugated metal plate 30 extends upward, the corrugated metal plate 30 is stretched into a straight plate, and the lower bearing plate 20 of the truss bridge node support device is fixed due to boundary conditions, and only the two ends move upward under the action of the load.

[0080] 2. When the truss bridge node support device is under pressure:

[0081] like Fig.13As shown, the upper bearing plate 10 of the truss bridge node support device is subjected to a vertical downward load with a displacement of 50 mm. The lower bearing plate 20 of the truss bridge node support device is fixed, and the upper bearing plate 10 of the truss bridge node support device does not deform. The internal U-shaped metal plate and the corrugated metal plate 30 are bent downward. The lower bearing plate 20 of the truss bridge node support device is fixed due to boundary conditions, and only the two ends move downward under the action of the load.

[0082] 3. When the truss bridge node support device is subjected to shear force:

[0083] like Fig.14 As shown, the right side of the truss bridge node support device is subjected to shear force and a shear displacement of 50 mm. The lower bearing plate 20 of the truss bridge node support device is fixed, and the upper bearing plate 10 of the truss bridge node support device undergoes severe buckling deformation. The internal U-shaped metal plate and the corrugated metal plate 30 are deformed and moved to the left. The lower bearing plate 20 of the truss bridge node support device is fixed due to boundary conditions, and the stress is concentrated on the right end.

[0084] Optionally, the outer surfaces of the upper bearing plate 10, the lower bearing plate 20, the corrugated metal plate 30, the first curved plate 40 and the second curved plate 50 are all electroplated with an anti-rust metal layer to prevent rust and corrosion; and / or, the outer surfaces of the upper bearing plate 10, the lower bearing plate 20, the corrugated metal plate 30, the first curved plate 40 and the second curved plate 50 are all coated with an epoxy resin layer to prevent rust and corrosion.

[0085] By adopting anti-corrosion measures such as electroplating an anti-rust metal layer (for example, hot-dip galvanizing or metal coating technology), not only can the corrosion resistance of the upper bearing plate 10, the lower bearing plate 20, the corrugated metal plate 30, the first curved plate 40 and the second curved plate 50 be improved, but also their appearance can be enhanced, thereby improving the visual effect of the bridge.

[0086] The present invention also provides a truss bridge, which includes the above-mentioned truss bridge node support device, and the truss bridge also includes a first support member 90 and a second support member 100, wherein the extension direction of the first support member 90 is cross-arranged with the extension direction of the second support member 100, and the first support member 90 is respectively detachably connected to an upper bearing plate 10 of a truss bridge node support device, so that the two truss bridge node support devices respectively support the first support member 90 and the second support member 100; wherein the outer surfaces of the first support member 90 and the second support member 100 are coated with an epoxy resin layer to prevent rust and corrosion.

[0087] By providing the epoxy resin coating, the corrosion resistance of the outer surface and nodes of the first support member 90 and the second support member 100 is significantly improved, thereby extending the service life of the truss bridge and increasing the safety of the entire truss bridge (eg, steel trestle structure).

[0088] In summary, the present invention provides a truss bridge node support device and a truss bridge. The present invention not only realizes reliable support for the truss bridge node, but also can timely replace the truss bridge node support device when it is corroded by arranging an upper bearing plate 10, a lower bearing plate 20, a corrugated metal plate 30, a first curved plate 40 and a second curved plate 50 to work together; by setting the specific shape of the corrugated metal plate 30, the corrugated metal plate 30 can absorb various forces at the node and dissipate the energy of the force by changing its curvature; by arranging the first curved plate 40 and the second curved plate 50 to be both U-shaped metal plates with openings, the U-shaped metal plates can absorb various forces at the node and dissipate the energy of the force by changing the opening angle, thereby effectively improving the overall bearing capacity of the truss bridge node support device for the force at the node, effectively bearing the node and constraining the truss bridge node under load The deformation under load can improve the bearing capacity and durability of the node; at the same time, when the truss bridge node support device is found to be rusted, the severely corroded structure can be replaced in time to achieve local reinforcement of the truss bridge; in addition, the present invention can not only effectively improve the mechanical properties of the nodes of the existing steel trestle structure through the coordinated use of the corrugated metal plate 30 and the U-shaped metal plate, but also play a good energy dissipation role in natural disasters such as earthquakes, thereby reducing the damage to the bridge structure; the mechanical design of the overall structure of the present invention not only takes into account the safety and durability of the structure, but also takes into account the economy and practicality, and has a significant effect on improving the comprehensive mechanical properties of the existing steel trestle structure, is suitable for the construction and maintenance of steel trestle structures under various environments and conditions, and has a wide range of engineering application value. The present invention is low in cost, easy to assemble and subsequently maintain and replace, and is suitable for large-scale promotion and use.

[0089] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0090] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0091] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0092] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0093] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A truss bridge node support device, characterized in that: include: An upper bearing plate (10), a lower bearing plate (20), a corrugated metal plate (30), a first curved plate (40) and a second curved plate (50); the upper bearing plate (10) is detachably connected to a node of a truss bridge, the two ends of the corrugated metal plate (30) are respectively fixedly connected to the upper bearing plate (10) and the lower bearing plate (20), and the corrugated metal plate (30) is a wavy metal plate; the first curved plate (40) and the second curved plate (50) have the same structure, and are both U-shaped metal plates with openings; the opening of the first curved plate (40) faces one side of the upper bearing plate (10) in the horizontal direction, and the upper and lower ends of the first curved plate (40) are respectively fixedly connected to the upper bearing plate (10) and the lower bearing plate (20); the opening of the second curved plate (50) faces the upper bearing plate (10) in the water. On the other side in the horizontal direction, the upper and lower ends of the second curved plate (50) are fixedly connected to the upper bearing plate (10) and the lower bearing plate (20) respectively; wherein the first curved plate (40), the second curved plate (50) and the corrugated metal plate (30) jointly support the node between the upper bearing plate (10) and the truss bridge, and the lower bearing plate (20) is relatively fixed to the ground or the bridge deck; the upper bearing plate (10) and the lower bearing plate (20) are arranged in parallel; the center line is a line connecting the center of mass of the upper bearing plate (10) and the center of mass of the lower bearing plate (20), and the center line is arranged vertically; the plane which is respectively perpendicular to the upper bearing plate (10) and the lower bearing plate (20) and contains the center line is a reference plane, and the first curved plate (40) and the second curved plate (50) are arranged symmetrically relative to the reference plane.

2. The truss bridge node support device according to claim 1, characterized in that: The upper bearing plate (10), the lower bearing plate (20), the corrugated metal plate (30), the first curved plate (40) and the second curved plate (50) are projected from top to bottom along the direction of gravity, and the projection of the upper bearing plate (10) coincides with the projection of the lower bearing plate (20); the projection of the corrugated metal plate (30), the projection of the first curved plate (40) and the projection of the second curved plate (50) are respectively located within the projection of the lower bearing plate (20).

3. The truss bridge node support device according to claim 2, characterized in that: The projection of the first curved plate (40) is set as the first projection, the projection of the second curved plate (50) is set as the second projection, and the projection of the corrugated metal plate (30) is set as the third projection; the first projection, the second projection and the third projection are all rectangular and are respectively arranged in parallel; wherein, there are at least two corrugated metal plates (30), the distance between the third projection of the corrugated metal plate (30) closest to the first curved plate (40) and the first projection is not less than 20 mm, the distance between the third projection of the corrugated metal plate (30) closest to the second curved plate (50) and the second projection is not less than 20 mm, and at least two of the corrugated metal plates (30) are arranged in parallel and spaced apart.

4. The truss bridge node support device according to claim 1, characterized in that: The upper bearing plate (10), the lower bearing plate (20), the corrugated metal plate (30), the first curved plate (40) and the second curved plate (50) are all made of alloy steel plate materials; the truss bridge node support device also includes a carrying assembly (60), the carrying assembly (60) includes a plurality of rollers (61), two fixed rails (62) and a stopper (63), the plurality of rollers (61) are arranged at intervals at the bottom of the lower bearing plate (20) to jointly carry the lower bearing plate (20); the fixed rails (62) are fixedly arranged relative to the ground or the bridge deck, the two fixed rails (62) are arranged at intervals, and are respectively limitedly matched with the rollers (61) to jointly carry the rollers (61) and constrain the rollers (61) to move below the node of the truss bridge; the stopper (63) is fixedly arranged relative to the ground or the bridge deck to stop the rollers (61).

5. The truss bridge node support device according to claim 4, characterized in that: The truss bridge node support device also includes two groups of support components (70), one group of the support components (70) includes a plurality of support springs (71) and a floating track (72), one end of the support spring (71) is fixedly connected to the ground or the bridge deck, and the other end is connected to the floating track (72); the plurality of support springs (71) are arranged at intervals along the extension direction of the floating track (72) to jointly support the floating track (72); the floating track (72) is arranged at one end of the fixed track (62) close to the stopper (63); the floating tracks (72) in the two groups of the support components (70) are respectively matched with one of the fixed tracks (62); wherein the roller ( There are four rollers (61) distributed at the four corners of the lower bearing plate (20); the two rollers (61) located on one side of the lower bearing plate (20) first and simultaneously move from the two fixed rails (62) to the two floating rails (72), and simultaneously press down the two floating rails (72), and move along the floating rails (72); after the two rollers (61) simultaneously move to be out of contact with the two floating rails (72), the multiple support springs (71) of the two groups of support assemblies (70) drive the floating rails (72) to rise, so as to abut against the bottom of the lower bearing plate (20), so as to support the lower bearing plate (20) and stop the movement of the two rollers (61) located on the other side of the lower bearing plate (20).

6. The truss bridge node support device according to claim 4, characterized in that: The truss bridge node support device also includes four connection blocks (80), and the four connection blocks (80) are fixedly arranged at the four corners of the upper bearing plate (10); there are four rollers (61) below the lower bearing plate (20), which are distributed at the four corners of the lower bearing plate (20); the connection blocks (80) are detachably connected to the node of the truss bridge by means of screw connection, so that the upper bearing plate (10) supports the node of the truss bridge; The four connecting blocks (80) correspond to the four rollers (61) one by one, forming four load-bearing groups; within the same load-bearing group, projected from top to bottom along the direction of gravity, the projection of the connecting block (80) and the projection of the roller (61) at least partially overlap.

7. The truss bridge node support device according to claim 1, characterized in that: The corrugated metal plate (30) extends in accordance with the cosine function law, the formula of the cosine function law is y=A·cos(ωx), A is the amplitude, and the value of A is not less than 6mm, the period T=2π / ω, and the value of T is 0-4π.

8. The truss bridge node support device according to claim 1, characterized in that: The U-shaped metal plate extends in accordance with the parabolic function law, and the formula of the parabolic function law is y 2 =2px, and the opening of the parabola points to the positive direction of the X-axis, p is the distance from the focus to the directrix, and the value of p is not less than 10mm.

9. The truss bridge node support device according to claim 1, characterized in that: The outer surfaces of the upper bearing plate (10), the lower bearing plate (20), the corrugated metal plate (30), the first curved plate (40) and the second curved plate (50) are all electroplated with an anti-rust metal layer to prevent rust and corrosion; And / or, the outer surfaces of the upper bearing plate (10), the lower bearing plate (20), the corrugated metal plate (30), the first curved plate (40) and the second curved plate (50) are all coated with an epoxy resin layer to prevent rust and corrosion.

10. A truss bridge, characterized in that: The truss bridge comprises the truss bridge node support device according to any one of claims 1 to 9, and the truss bridge also comprises a first support member (90) and a second support member (100), wherein the extension direction of the first support member (90) is cross-arranged with the extension direction of the second support member (100), and the first support member (90) is respectively detachably connected to the upper bearing plate (10) of one of the truss bridge node support devices, so that the two truss bridge node support devices respectively support the first support member (90) and the second support member (100); wherein the outer surfaces of the first support member (90) and the second support member (100) are coated with an epoxy resin layer to prevent rust and corrosion.

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