Connecting joint and truss or net rack comprising same

Abstract

The invention discloses a connecting joint and a truss or a net rack comprising the connecting joint, and particularly relates to the technical field of constructions.The connecting joint is used for connecting a first part and a second part and comprises a sliding plate and a restraining plate, and the sliding plate is fixedly connected with the second part; the restraint plate is fixedly connected with the first part; sawtooth-shaped corrugations are arranged on the connecting faces of the sliding plate and the restraining plate and are connected through a spring gasket. The spring washers can conduct compression energy absorption by deforming in the direction of the bolts, the sliding plate can slide left and right along the inclined table face in the range of a triangular sawtooth of the restraining plate so as to dissipate energy, and due to the fact that the whole energy dissipation element is arranged near the node area, the node is reinforced, and the anti-seismic effect is achieved. And due to the connection of the sliding plate and the constraint plate, even if the branch pipe is broken under the action of an earthquake, the energy consumption element still lifts the main pipe, so that a catenary mechanism is formed, and the anti-collapse performance is fully exerted.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to a connection node and a truss or grid comprising the connection node. Background Art

[0002] The damage caused by earthquakes to the construction industry is enormous, and the economic losses are immeasurable. Due to the special characteristics of steel trestles, they can not only be used as trestles in tourist attractions, but also as coal transport trestles in the coal industry, and their engineering vibration cannot be ignored. At the same time, due to accidental loads and other reasons, large-span stadiums, stand canopies, etc., have insufficient bearing capacity and limited anti-collapse performance.

[0003] At present, steel trestles are mainly welded from trusses. They have no key rods and all connection nodes are welded. They cannot meet the design criteria of "strong nodes, weak components" in the structure. Moreover, under the action of earthquakes or other vibrations, their nodes are seismic-resistant designs and cannot dissipate energy, which will cause stress concentration in the node domain, making the earthquake damage more significant. Moreover, after the vibration damage, the collapse of the truss due to the tearing of the weld will have an adverse effect on other structures. Therefore, it is necessary to propose a new type of truss connection node so that the steel trestles can play a good role in vibration damage. Moreover, since the application of steel trestles in the industrial field is a key link, it plays a very important role in the entire production, so the anti-collapse design is particularly critical, especially in a vibration environment, and the reliability of its fatigue performance cannot be guaranteed by normal simple welding. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a connection node and a truss or grid including the connection node, which solves at least one technical problem raised in the background technology.

[0006] (II) Technical solution In order to achieve the above object, the technical solution adopted by the present invention is: A connection node, used for connecting a first component and a second component, the connection node comprising: A sliding plate, wherein the sliding plate is fixedly connected to the second component; A restraining plate, the restraining plate is fixedly connected to the first component; Furthermore, the surfaces where the sliding plate and the restraining plate meet have sawtooth corrugations and are connected via spring washers.

[0007] Preferably, the sliding plate has a slotted hole, and the restraining plate has a round hole; The bolts are driven out of the spring washer, the restraining plate and the sliding plate in sequence.

[0008] Preferably, the sawtooth corrugations are continuous triangles, continuous trapezoids or continuous arcs.

[0009] Preferably, the second component includes a first branch pipe and a second branch pipe; a sliding plate is fixed on the first branch pipe and the second branch pipe, and the surface where the sliding plate and the restraining plate meet has sawtooth corrugations and is connected by a spring gasket.

[0010] Preferably, the first component is a welded ball, and the second component is a cold-formed steel pipe.

[0011] Preferably, bamboo boards are provided at the upper and lower ends of the cold-formed steel pipe, sliding plates are fixedly provided at the ends of the cold-formed steel pipe, and restraining plates are fixedly provided on the outer wall of the welding ball.

[0012] Preferably, the first component is a bolt ball, and the second component is a rod.

[0013] Preferably, the restraining plate is fixed to the cone head sealing plate of the rod, and the sliding plate is fixed to the bolt ball.

[0014] A truss using any of the above-mentioned connection nodes is also provided.

[0015] (III) Beneficial effects

[0016] The present invention provides a connection node and a truss or grid including the connection node, which has the following beneficial effects compared with the prior art: The spring gasket can absorb energy by compressing and deforming along the direction of the bolt. The sliding plate will slide left and right along the inclined table within a triangular sawtooth range of the constraint plate to dissipate energy. Since the entire energy dissipation element is set near the node domain, the node has actually been strengthened to achieve earthquake resistance. And because the sliding plate is connected to the constraint plate, even if the branch pipe breaks under the action of an earthquake, the energy dissipation element can still pull the main pipe, thereby forming a catenary mechanism and giving full play to the anti-collapse performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is the overall three-dimensional diagram of the connection node of the present invention; Figure 2 It is a three-dimensional diagram of the connection node involved in the present invention without a constraint plate; Figure 3 is a front view of a connection node involved in the present invention with one constraint plate removed; Figure 4 It is a three-dimensional diagram of the ladder structure of the connection nodes involved in the present invention; Figure 5It is a front view of the arc-shaped structure of the connection node involved in the present invention; Figure 6 It is a second three-dimensional graph of the first state of the connection node involved in the present invention; Figure 7 It is a second state three-dimensional graph of the second connection node involved in the present invention; Figure 8 It is an overall three-dimensional diagram of the welding ball node involved in the present invention; Fig. 9 It is an overall three-dimensional diagram of the bolt ball node involved in the present invention; Fig.10 It is a force analysis diagram of the first connection node involved in the present invention; Fig.11 It is a force analysis diagram of the sawtooth corrugations formed by continuous trapezoids in the present invention; Fig.12 The present invention relates to a force analysis diagram of a sawtooth corrugation formed by continuous steps; Fig.13 The present invention relates to a force analysis diagram of a sawtooth corrugation formed by a continuous arc shape; Fig.14 is a force analysis diagram of the second type of connection node involved in the present invention; Among them, the first component 1, the second component 2, the first branch pipe 201, the second branch pipe 202, the bamboo board 204, the protective coating layer 205, the cone head 206, the cone head sealing plate 207, the sliding plate 3, the restraining plate 4, the bolt 5, and the spring gasket 6. Specific implementation methods

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. 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.

[0019] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods: As the instruction manual Figure 1-Figure 9 As shown, the present invention provides a connection node and a truss or grid including the connection node, which can not only provide sufficient bearing capacity and shock absorption energy consumption, but also achieve perfect anti-collapse performance of the node.

[0020] On the basis of the connection node, by using the connection node connection structure on the truss and the grid, earthquake resistance can be achieved, and the collapse resistance can also be achieved, thereby improving the performance of the truss and the grid.

[0021] Specifically, an embodiment of the present invention provides a connection node for connecting a first component 1 and a second component 2, that is, the connection node of the present application is used for connecting two structural members. Specifically, the connection node includes a sliding plate 3, which is fixedly connected to the second component 2; a constraint plate 4, which is fixedly connected to the first component 1; and the surfaces where the sliding plate 3 and the constraint plate 4 meet have serrated corrugations and are connected by a spring gasket 6.

[0022] Furthermore, a specific means is provided for connecting the sliding plate 3 and the restraining plate 4 through the spring washer 6, which is to open a slotted hole on the sliding plate 3 and a round hole on the restraining plate 4. That is, the sliding plate 3 and the restraining plate 4 have sawtooth corrugations on one side thereof, the sawtooth corrugations of the two are meshed together, and the bolts 5 are sequentially driven out of the spring washer 6, the restraining plate 4 and the sliding plate 3 to realize the connection between the restraining plate 4 and the sliding plate 3.

[0023] Specifically, for ease of understanding, the present application is described in detail based on a truss structure, that is, to achieve the connection of a pipe structure, wherein the first component 1 is a main pipe and the second component 2 is a branch pipe, such as Figure 1 As shown, a first connection node is provided: a sliding plate 3 is welded on the branch pipe, and a restraining plate 4 is welded on the main pipe, and the sliding plate 3 and the restraining plate 4 have zigzag corrugations and are connected by a spring gasket 6. Under the action of an earthquake, since the spring gasket 6 can be compressed and absorb energy by deforming along the direction of the bolt 5, the sliding plate 3 will slide left and right along the inclined table within a triangular zigzag range of the restraining plate 4 to dissipate energy, and since the entire energy dissipation element is set near the node domain, the node has actually been strengthened to achieve an earthquake-resistant effect. And due to the connection between the sliding plate 3 and the restraining plate 4, even if the branch pipe breaks under the action of an earthquake, the energy dissipation element still pulls the main pipe, thereby forming a catenary mechanism and giving full play to the anti-collapse performance.

[0024] The first type of connection node mentioned above can achieve the following effects: Fig.10 As shown, the specific performance is: realizing staged force, triggering multi-stage tensile mechanism and self-resetting energy consumption behavior.

[0025] Furthermore, the sawtooth corrugations in the embodiment of the present invention may be continuous triangles, continuous trapezoids or continuous arcs. Figure 1 and 2 As shown, the sawtooth ripples are formed by continuous triangles. Figure 4The sawtooth corrugations formed by continuous trapezoids are specifically different from those formed by continuous triangles in that the grooves of the sawtooth corrugations of the sliding plate 3 and the constraint plate 4 are not sharp but straight sections; compared with the sawtooth corrugations formed by continuous triangles, when subjected to force, the sliding plate 3 first slides a distance on the constraint plate 4 and then contacts the inclined table surface of the constraint plate 4, and then slides along the inclined table surface so that the spring gasket 6 is compressed to absorb energy, and finally the purpose of strengthening the node domain and consuming energy is achieved. The effects that can be achieved are as follows: Fig.11 As shown, no-load sliding is realized, and later work is performed, and finally, force is applied in stages, and multi-stage tensile mechanism and self-reset energy consumption behavior are triggered.

[0026] Furthermore, it can also be made into a stepped shape and an arc shape, such as Figure 5 The sawtooth corrugations are formed by continuous arcs. Continuous steps can achieve variable stiffness and two-stage force. Different slopes can be designed according to design needs. Continuous arcs can better realize nodes with variable stiffness, so that when sliding on the arc table, the energy consumption is more sufficient and reasonable, thus realizing multi-stage energy consumption.

[0027] The continuous step-type can achieve the following effects: Fig.12 As shown, two-stage stiffness stress is achieved, and two-stage tensile mechanism and self-resetting energy dissipation behavior are triggered.

[0028] The effects that can be achieved by continuous arcs are as follows: Fig.13 As shown, the variable stiffness stress is achieved in stages, and the multi-stage tensile mechanism and self-resetting energy dissipation behavior are triggered.

[0029] Furthermore, in order to better illustrate the above embodiment, the present application also provides a second connection node, specifically Figure 6 and Figure 7 As shown, for the sake of convenience, a detailed description is given based on the truss structure. The second component 2 is a branch pipe structure, which includes a first branch pipe 201 and a second branch pipe 202; a sliding plate 3 is fixed on each of the first branch pipe 201 and the second branch pipe 202, and the surface where the sliding plate 3 and the restraining plate 4 meet has a sawtooth corrugation and is connected by a spring gasket 6.

[0030] The first branch pipe 201 and the second branch pipe 202 are effectively connected through the constraint plate 4, the sliding plate 3, the spring washer 6 and the bolt 5. The node performance can be changed by adjusting the distance between the first branch pipe 201 and the second branch pipe 202. Figure 6 The nodes with a longer distance can generally be considered as hinge nodes, such as Figure 7 If the distance is closer, it is considered to be rigidly connected.

[0031] The first branch pipe 201 transmits the internal force to the second branch pipe 202 through the connection node, and then to the main pipe. When the first branch pipe 201 is pulled or compressed, since the sliding plate 3 is welded on the first branch pipe 201, the sliding plate 3 slides with the first branch pipe 201, causing the compression of the spring gasket 6, thereby absorbing and consuming energy. When it slides to a certain extent on the inclined table, the spring gasket 6 is completely compressed, which is equivalent to strengthening the node, thereby obtaining good seismic resistance. And when the branch pipe breaks, the lifting of the energy-consuming element can well prevent collapse.

[0032] The above connection nodes can achieve the following effects: Fig.14 As shown: the hinged connection nodes do not transmit bending moment; the rigid connection nodes transmit bending moment.

[0033] The structural connection node of the embodiment of the present invention can be used not only for trusses but also for grid frames.

[0034] Due to the promulgation of the new version of the load code, which stipulates the increase of the load partial coefficient, it will lead to the need to reinforce the grid structure in service, and a considerable number of new projects need to be redesigned reasonably, so it is necessary to redesign or reinforce the original welded ball or bolt ball node to meet the existing load code requirements. At the same time, due to the complexity and redundancy of the grid structure, its local damage often does not cause the collapse of the overall structure. In actual engineering applications, due to various installation deviations, the actual structural force is inconsistent with the initial design, and local damage often causes the collapse of the entire structure. Therefore, it is very important to effectively prevent local damage. Since grid structures are generally large-span structures, when the structure encounters an earthquake or accidental load change, the connection between the node and the rod in the grid structure is often damaged. The disaster will cause huge economic losses and life safety hazards, so it is imperative to improve its anti-collapse performance. Therefore, it is necessary to propose a new welded ball node and bolt ball node that can dissipate energy and resist collapse to effectively prevent or improve the damage of traditional grid structures.

[0035] Furthermore, in order to better illustrate the above embodiment, the present application also provides a welding ball node, such as Figure 8 As shown, the first component 1 is a welded ball, and the second component 2 is a cold-bent steel pipe.

[0036] A bamboo board 204 is pasted on the cold-formed steel pipe. The bamboo board 204 includes reconstituted bamboo, glued bamboo, etc. The head of the cold-formed steel pipe is welded with a sliding plate 3, and the welding ball is extended to weld a constraint plate 4. Bolts 5 are used to penetrate and spring washers 6 are used to effectively connect the sliding plate 3 and the constraint plate 4. Finally, a protective coating layer 205 is sprayed to wrap it to achieve multiple goals of anti-corrosion and fire prevention. In the embodiment of the present invention, bamboo is applied to the grid structure. At the same time, bamboo is used in a large-span grid, and is finally wrapped by spraying a protective coating to achieve the anti-corrosion and fire prevention integration of the large-span grid structure.

[0037] Through the above arrangement, not only can bamboo be used in the newly constructed grid structure, but also effective earthquake-resistant and anti-collapse design can be carried out through the construction of the restraining plate 4 and the sliding plate 4.

[0038] Furthermore, in order to better illustrate the above embodiment, the present application also provides a bolt ball joint, such as Fig. 9 As shown; the first component 1 is a bolt ball, the second component 2 is a rod, and the end of the rod includes a cone head 206 and a cone head cover plate 207. The constraint plate 4 is fixed to the cone head cover plate 207 of the rod, and the sliding plate 3 is fixed to the bolt ball. The constraint plate 4 and the sliding plate 3 are constructed to reinforce the bolt ball node of the space grid structure in the existing service state. By welding the constraint plate 4 to the cone head cover plate 207 and the sliding plate 4 to the bolt ball at the same time, a second line of defense is formed, which can not only improve the bearing capacity of the original bolt ball node, but also dissipate energy through sliding between the two plates under the action of an earthquake, and can also improve its safety reserve, achieve progressive destruction, and thus be beneficial to anti-collapse.

[0039] In the above scheme of the embodiment of the present invention, the spring gasket 6 can absorb energy by deforming along the direction of the bolt 5, and the sliding plate 3 will slide left and right along the inclined table within a triangular serration range of the constraint plate 4 to dissipate energy. Since the entire energy-absorbing element is arranged near the node domain, the node has actually been strengthened to achieve the anti-seismic effect. And due to the connection between the sliding plate 3 and the constraint plate 4, even if the branch pipe breaks under the action of an earthquake, the energy-absorbing element still pulls the main pipe, thereby forming a catenary mechanism and giving full play to the anti-collapse performance. Under the premise of ensuring sufficient anti-seismic performance, the seismic effect can be dissipated by the energy dissipation and shock-absorbing elements, so as to resist earthquake damage of higher intensity. During the collapse process, the rods can be effectively tied together so that the overall structure will not collapse as a whole.

[0040] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A connection node for connecting a first component (1) and a second component (2), characterized in that: The connection node includes: A sliding plate (3), the sliding plate (3) being fixedly connected to the second component (2); A restraining plate (4), wherein the restraining plate (4) is fixedly connected to the first component (1); Furthermore, the surfaces where the sliding plate (3) and the restraining plate (4) meet have sawtooth-shaped corrugations and are connected via a spring gasket (6).

2. The connection node according to claim 1, characterized in that: The sliding plate (3) has a slotted hole, and the restraining plate (4) has a round hole; The bolt (5) is driven out of the spring washer (6), the restraining plate (4) and the sliding plate (3) in sequence.

3. The connection node according to claim 1, characterized in that: The sawtooth corrugations are continuous triangles, continuous trapezoids or continuous arcs.

4. The connection node according to claim 1, characterized in that: The second component (2) comprises a first branch pipe (201) and a second branch pipe (202); a sliding plate (3) is fixed to each of the first branch pipe (201) and the second branch pipe (202); the surface where the sliding plate (3) and the restraining plate (4) meet has sawtooth corrugations and is connected via a spring gasket (6).

5. The connection node according to claim 1, characterized in that: The first component (1) is a welded ball, and the second component (2) is a cold-bent steel pipe.

6. The connection node according to claim 5, characterized in that: The upper and lower ends of the cold-bent steel pipe are provided with bamboo boards (204), the ends of the cold-bent steel pipe are fixedly provided with sliding plates (3), and the outer wall of the welding ball is fixedly provided with a restraining plate (4).

7. The connection node according to claim 1, characterized in that: The first component (1) is a bolt ball, and the second component (2) is a rod.

8. The connection node according to claim 8, characterized in that: The restraining plate (4) is fixed to the cone head sealing plate (207) of the rod, and the sliding plate (3) is fixed to the bolt ball.

9. A truss using the connection node according to any one of claims 1 to 8.

10. A grid using the connection nodes described in any one of claims 1-8.

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