Swing reset joint of modular steel structure and using method of swing reset joint

Abstract

The invention relates to a swing reset node of a modular steel structure and a using method thereof, and belongs to the technical field of steel structure node connection, the node comprises a module column, the module column is divided into an upper module column, a lower module column, two in-column assemblies and a connecting assembly, and each in-column assembly comprises an inner ring plate, a spring and other components; the connecting assembly comprises a prestress steel strand, a horizontal connecting plate, an inner inserting piece, an energy dissipation metal piece and an inserting plate, the prestress steel strand penetrates through all the parts and is anchored through an anchorage device, and the energy dissipation metal piece is connected with the inner inserting piece and the horizontal connecting plate through bolts; the using method comprises the steps that the in-column assembly and the connecting assembly are assembled in a factory, and then the module column and the connecting assembly are hoisted and locked on site. The device can be prefabricated in a factory and rapidly installed on site, achieves the self-resetting function, is not limited by construction space, does not need to be anchored on site, and is suitable for building structures with recoverable function requirements.

Description

Technical Field

[0001] The invention relates to the technical field of steel structure node connection, and in particular to a swing reset node of a modular steel structure and a use method thereof. Background Art

[0002] The traditional earthquake-resistant concept aims to prevent structural collapse, but when the main load-bearing components or energy-absorbing devices of the structure produce irreversible plastic deformation, the structure as a whole will accumulate large residual deformation. Excessive residual displacement will increase the technical difficulty and economic burden of the post-earthquake repair work of the structure. With the increasing demand for the seismic performance of buildings and the development of the economic level, the structures designed according to the traditional earthquake-resistant concept are obviously difficult to meet the demand. Therefore, some scholars have proposed a new earthquake-resistant concept of recoverable function earthquake protection. Earthquake recoverable function structure refers to a structure that can be restored to use function without repair or with a little repair after an earthquake. Its main purpose is to enable the structure to have the ability to quickly restore its use function after an earthquake, thereby reducing the impact caused by the interruption of the structure's post-earthquake function.

[0003] Recoverable functional devices generally use prestressed steel strands or other reinforcement materials to achieve self-resetting functions, and have been successfully applied to general prefabricated structures. However, the anchoring of steel strands requires construction space, and on-site anchoring takes time. Due to the limitations of construction space and construction efficiency, the use of recoverable functional devices in modular steel structures still faces great challenges.

[0004] Therefore, on the basis of ensuring that the advantage of modular assembly efficiency is not affected, developing a self-resetting device that is not restricted by construction space and does not require on-site anchoring is of great significance to the development of modular steel structures. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a swing reset node of a modular steel structure and a method of using the same, which realizes self-reset through the cooperation of the column components and the connection components, while achieving the effect of not being restricted by the construction space and not requiring on-site anchoring.

[0006] To achieve the above object, the present invention provides the following technical solutions: In a first aspect, the present invention provides a swing reset node of a modular steel structure, wherein the modular steel structure has a modular column, wherein the modular column comprises an upper modular column and a lower modular column, and the swing reset node comprises: Two in-column components are respectively mounted on the lower end of the upper module column and the upper end of the lower module column; and, A connecting component, disposed between the two column inner components and used to connect the two column inner components; The connection component comprises: Prestressed steel strands, with anchors provided at both ends; A horizontal connecting plate, on which a first through hole is reserved for the prestressed steel strand to pass through; Two inner plug-ins are respectively arranged at the upper and lower ends of the horizontal connecting plate; Two groups of energy-absorbing metal parts, two energy-absorbing metal parts form one group, and each group of energy-absorbing metal parts is symmetrically connected to the end side wall of each of the inner plug-ins close to the horizontal connecting plate; One end of each of the inner plug-ins away from the horizontal connecting plate is respectively connected to a plug-in plate, and a second through hole is reserved on the plug-in plate for the prestressed steel strand to pass through. The prestressed steel strand runs through the entire connecting assembly and is anchored on the outer side of the plug-in plate using the anchor. The inner plug-in and the connecting plate are only in contact but not welded. When the energy-absorbing metal part is stretched and deformed by force, the contact point between the inner plug-in and the connecting plate can be lifted, and the tension generated by the stretching of the prestressed steel strand cooperates with the deadweight of the upper module column to reset the swing reset node.

[0007] Furthermore, the column inner component comprises: An inner ring plate 1 and an inner ring plate 2 are welded to the inner side of the module column; the inner ring plate 2 is located below the inner ring plate 1, and a gap is left between the inner ring plate 1 and the inner ring plate 2; and, Two springs, each of which is connected with a spring fixing plate and a clamping block at both ends; the two spring fixing plates are respectively welded to the edges of the upper surface of the inner ring plate 2; the clamping block moves in the gap between the inner ring plate 1 and the inner ring plate 2, and the clamping block is used to limit the inner plug-in.

[0008] Furthermore, the connection component further includes: Bolt one and bolt two; The inner plug-in and the energy-dissipating metal piece are both provided with a third through hole for the first bolt to pass through; the horizontal connecting plate and the energy-dissipating metal piece are both provided with a fourth through hole for the second bolt to pass through; The bolt 1 passes through the third through hole to connect the inner plug-in component with the energy-dissipating metal component; The second bolt passes through the fourth through hole to connect the horizontal connecting plate to the energy-absorbing metal member.

[0009] Furthermore, the connection component further includes: Two shear keys are respectively welded to the upper and lower ends of the horizontal connecting plate, and the upper module column and the lower module column are respectively sleeved on the two shear keys.

[0010] Furthermore, the inner plug-in is selected from at least one of H-shaped steel or hollow square steel tube.

[0011] Furthermore, the prestressed steel strands are replaced with prestressed steel rods or SMA rods or fiber reinforced materials.

[0012] Furthermore, the energy-absorbing metal part is selected from at least one of angle steel and T-shaped steel.

[0013] Furthermore, a friction plate is added between the energy-absorbing metal part and the inner plug-in component to realize a dual energy-absorbing mechanism of yield and friction.

[0014] In a second aspect, the present invention further provides a method for using the swing reset node of the modular steel structure according to the first aspect, comprising the following steps: S1. In a factory, assemble the inner ring plate 1, the inner ring plate 2, the spring fixing plate, the spring and the clamping block into an inner column component, and install the inner column component in a module column including an upper module column and a lower module column; assemble the horizontal connecting plate, the shear key, the bolt 1, the bolt 2, the prestressed steel strand, the anchor, the energy-absorbing metal part, the inner plug-in and the plug-in plate into a connecting component; after the assembly is completed, transport the connecting component and the module column with the inner column component to the construction site; S2, hoisting the lower module column, and installing the connecting assembly on its upper end, wherein the plug plate at the lower end of the connecting assembly passes through the block in the lower module column and is locked, thereby completing the connection between the lower module column and the connecting assembly; S3. Lift the upper module column, align its lower end with the installed connection component and then lower it. The plug plate at the upper end of the connection component passes through the block inside the upper module column and is locked, thereby completing the connection between the upper module column and the connection component.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention, through the arrangement of the column inner components and the connection components, can complete the assembly at the installation site by simply connecting the lower module column and the column inner components, the connection components and the upper module column and the column inner components. During the connection, only gravity is required to complete the connection between the upper module column and the lower module column. The connection is efficient and fast, saving time and effort. After being displaced by horizontal and vertical forces, the energy-consuming metal parts will be repeatedly stretched to consume energy, and self-reset can be achieved through the tension of the prestressed steel strands, thereby significantly reducing the residual deformation of the structure. The problem of the difficulty in applying the swing reset technology at the nodes of the modular steel structure is solved. At the same time, the prestressed steel strands can be used in the modular structure to achieve the effect of self-reset without on-site anchoring, so that the modular steel structure can be restored to its function without repair or with only a small amount of repair, saving the cost of post-earthquake repair.

[0016] (2) By providing energy-absorbing metal parts and friction plates, the present invention can effectively consume energy when the structure is impacted by an earthquake, thereby improving the overall earthquake resistance of the building and ensuring the safety and stability of the building.

[0017] (3) The swing reset node of the present invention can be easily integrated with the existing modular steel structure system, which not only maintains the advantage of modular assembly efficiency but also enhances the seismic resistance of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 The overall schematic diagram of the swing reset node of the modular steel structure provided by the present invention after the connection is completed; Figure 2 A schematic diagram of a connection assembly of a swing reset node of a modular steel structure provided by the present invention; Figure 3 An exploded schematic diagram of a swing reset node of a modular steel structure provided by the present invention; Figure 4 A schematic diagram of the decomposition of the components in the column provided by the present invention; Figure 5 A schematic diagram of the connection method provided by the present invention; Figure 6 for Figure 1 Schematic diagram of the internal structure after removing the module column in area A; Figure 7 for Figure 6 Schematic diagram of middle section B; Figure 8 for Figure 6 Schematic diagram of the middle section C; Fig. 9 A schematic diagram of a swing reset node of a modular steel structure provided by the present invention after being stressed and before being reset; Fig.10 A stress cloud diagram of a swing reset node of a modular steel structure provided by the present invention during a stress-bearing process; Fig.11 The hysteresis curve of the swing reset node of the modular steel structure provided by the present invention under the finite element simulation of reciprocating loading.

[0020] Figure numerals: 1. upper module column, 2. lower module column, 3. inner ring plate one, 4. inner ring plate two, 5. spring fixing plate, 6. spring, 7. horizontal connecting plate, 8. shear key, 9. bolt one, 10. bolt two, 11. prestressed steel strand, 12. anchor, 13. energy-absorbing metal parts, 14. internal plug-in unit, 15. block, 16. plug-in unit. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "upper", "lower", "inner", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0024] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be regarded as specifically disclosed in this article.

[0025] For the purpose of this specification and the appended claims, unless otherwise stated, all numbers expressing amounts, percentages or ratios and other numerical values ​​used in this specification and the appended claims are understood to be modified in all cases by the term "about". In addition, all ranges disclosed herein are inclusive and independently combinable. Example 1

[0026] This embodiment provides a self-locking and self-resetting node for a modular steel structure, such as Figure 1-Figure 8 As shown, the modular steel structure has modular columns, and the modular columns include an upper modular column 1 and a lower modular column 2. Figure 2 As shown, the swing reset node includes: Two column in-column components, respectively mounted at the lower end of the upper module column 1 and the upper end of the lower module column 2; and, A connecting component is disposed between two in-column components and is used to connect the two in-column components; Connectivity components, including: Prestressed steel strand 11, with anchors 12 at both ends; A horizontal connecting plate 7, on which a first through hole is reserved for the prestressed steel strand 11 to pass through; Two inner plug-ins 14 are respectively arranged at the upper and lower ends of the horizontal connecting plate 7; Two groups of energy-absorbing metal parts 13, two energy-absorbing metal parts 13 form one group, and each group of energy-absorbing metal parts 13 is symmetrically connected to the end side wall of each inner plug-in unit 14 close to the horizontal connecting plate 7; One end of each inner plug 14 away from the horizontal connecting plate 7 is connected to a plug plate 16 , and a second through hole is reserved on the plug plate 16 for the prestressed steel strand 11 to pass through. The prestressed steel strand 11 runs through the entire connection assembly and is anchored on the outside of the plug plate 16 using an anchor 12 .

[0027] Specifically, Figure 4 As shown, the inner column component includes: an inner ring plate 1 3 and an inner ring plate 2 4 welded on the inner side of the module column; the inner ring plate 2 4 is located below the inner ring plate 1 3, with a gap between the inner ring plate 1 3 and the inner ring plate 2 4; and two springs 6, each of which is connected to a spring fixing plate 5 and a clamping block 15 at both ends; the two spring fixing plates 5 are respectively welded on both sides of the edge of the upper surface of the inner ring plate 2 4; the clamping block 15 moves in the gap between the inner ring plate 1 3 and the inner ring plate 2 4, and the clamping block 15 is used to limit the inner plug-in 14.

[0028] like Figure 3 As shown, the connection assembly also includes: a bolt 9 and a bolt 10; a third through hole for the bolt 9 to pass through is opened on the inner plug 14 and the energy-absorbing metal part 13; a fourth through hole for the bolt 10 to pass through is opened on the horizontal connecting plate 7 and the energy-absorbing metal part 13; Bolt 1 9 passes through the third through hole to connect the inner plug-in 14 with the energy-dissipating metal part 13; The second bolt 10 passes through the fourth through hole to connect the horizontal connecting plate 7 to the energy dissipation metal member 13; like Fig. 9 As shown, since the inner plug 14 and the horizontal connecting plate 7 are only in contact but not directly connected, when subjected to external force, the inner plug 14 will follow the upper module column 1 to be lifted relative to the horizontal connecting plate 7 to stretch the prestressed steel strand 11. The tension generated by the elongation of the prestressed steel strand 11 cooperates with the self-weight of the upper module column 1 as a restoring force to reset the swing reset node.

[0029] like Figure 2 As shown, the connection assembly also includes: two shear keys 8, which are respectively welded to the upper and lower ends of the horizontal connection plate 7, and the upper module column 1 and the lower module column 2 are respectively sleeved on the two shear keys 8.

[0030] Preferably, the inner plug-in 14 is selected from at least one of an H-shaped steel or a hollow square steel tube.

[0031] Preferably, the prestressed steel strands 11 are replaced with prestressed steel rods or SMA rods or fiber reinforced materials.

[0032] Preferably, the energy dissipation metal member 13 is selected from at least one of angle steel and T-shaped steel.

[0033] Preferably, a friction plate is added between the energy-absorbing metal part 13 and the inner plug-in part 14 .

[0034] Fig.10 The stress cloud diagram of the swing reset node of the modular steel structure provided by the present invention during the stress process is as follows: Fig.10 As shown, the stress and deformation are mainly concentrated on the energy-absorbing metal part 13 and the bolt 10, the stress on the module column is very small, and the energy-absorbing metal part 13 can exert its energy-absorbing capacity through deformation.

[0035] Fig.11 The hysteresis curve of the swing reset node of the modular steel structure provided by the present invention under the finite element simulation of reciprocating loading has a relatively full hysteresis loop, indicating that the energy dissipation effect is good, and the residual displacement is very small, indicating that the self-reset effect is good.

[0036] The present invention realizes the automatic reset function of the structure after being subjected to lateral force through the cooperation of the column internal components and the connection components, effectively reduces the residual deformation of the structure after the earthquake, and reduces the workload and cost of subsequent repairs. Compared with the traditional on-site anchoring method, the swing reset node of the present invention can be pre-assembled in the factory, avoiding the complicated on-site anchoring process and is not limited by the construction space. It is suitable for modular steel structure buildings under various site conditions, can simplify the construction process and improve construction efficiency. Example 2

[0037] This embodiment provides a swing reset node of a modular steel structure and a method for using the same, which specifically includes the following steps: S1. In the factory, the inner ring plate 1 3, the inner ring plate 2 4, the spring fixing plate 5, the spring 6 and the clamping block 15 are assembled into an inner column component, and the inner column component is installed in the module column including the upper module column 1 and the lower module column 2; the horizontal connecting plate 7, the shear key 8, the bolt 1 9, the bolt 2 10, the prestressed steel strand 11, the anchor 12, the energy-absorbing metal part 13, the inner plug-in 14 and the plug-in plate 16 are assembled into a connecting component; after the assembly is completed, the connecting component and the module column with the inner column component are transported to the construction site; S2, hoist the lower module column 2, and install the connecting assembly on its upper end, wherein the plug plate 16 at the lower end of the connecting assembly passes through the block 15 in the lower module column 2 and is locked, thereby completing the connection between the lower module column 2 and the connecting assembly; S3, hoist the upper module column 1, align its lower end with the installed connection component and then lower it, the plug plate 16 at the upper end of the connection component passes through the block 15 inside the upper module column 1 and is locked, thereby completing the connection between the upper module column 1 and the connection component.

[0038] Preferably, before connection, the two blocks 15 are pushed apart by a limit block, and when the plug plate 16 passes between the two blocks 15, the limit block is pushed out. After the plug plate 16 passes through the block 15, the block 15 pops out under the action of the spring 6 to lock the plug plate 16, thereby realizing the connection between the connecting component and the module column.

[0039] After the connection between the upper module column and the lower module column is completed according to the above steps, when the entire modular steel structure is subjected to an earthquake, the swing reset node can be swing reset under the action of the prestressed steel strands 11, thereby significantly reducing the residual deformation of the modular steel structure.

[0040] The present invention can be assembled on site only by connecting the lower module column 2 and the components inside the column, the connecting components and the upper module column 1 and the components inside the column. In the connection process, only gravity is required to complete the connection between the upper module column and the lower module column. The connection is efficient and fast, saving time and effort. After being displaced by horizontal and vertical forces, the energy-consuming metal parts 13 are repeatedly stretched to consume energy, and self-reset is achieved through the tension of the prestressed steel strands 11, thereby significantly reducing the residual deformation of the structure, so that the modular steel structure can be restored to its function without repair or with only a small amount of repair, saving post-earthquake repair costs, and solving the problem of the difficulty in applying the swing reset technology at the nodes of the modular steel structure.

[0041] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A modular steel structure swing reset node, characterized in that: The modular steel structure has a modular column, wherein the modular column comprises an upper modular column (1) and a lower modular column (2), and the swing reset node comprises: Two in-column components are respectively mounted on the lower end of the upper module column (1) and the upper end of the lower module column (2); and, A connecting component, disposed between the two column inner components and used to connect the two column inner components; The connection component comprises: A prestressed steel strand (11), with anchors (12) provided at both ends; A horizontal connecting plate (7) having a first through hole reserved thereon for allowing the prestressed steel strand (11) to pass through; Two inner plug-ins (14) are respectively arranged at the upper and lower ends of the horizontal connecting plate (7); Two groups of energy-absorbing metal parts (13), two energy-absorbing metal parts (13) form one group, and each group of energy-absorbing metal parts (13) is symmetrically connected to the end side wall of each of the inner plug-ins (14) close to the horizontal connecting plate (7); One end of each of the inner plugs (14) away from the horizontal connecting plate (7) is connected to a plug plate (16), and a second through hole is reserved on the plug plate (16) for the prestressed steel strand (11) to pass through. The prestressed steel strand (11) runs through the entire connection assembly and is anchored on the outside of the plug plate (16) using the anchor (12).

2. The swing reset node of modular steel structure according to claim 1, characterized in that: The column inner component comprises: An inner ring plate 1 (3) and an inner ring plate 2 (4) are welded to the inner side of the module column; the inner ring plate 2 (4) is located below the inner ring plate 1 (3), and a gap is left between the inner ring plate 1 (3) and the inner ring plate 2 (4); and, Two springs (6), each of the two ends of the spring (6) being respectively connected to a spring fixing plate (5) and a clamping block (15); the two spring fixing plates (5) are respectively welded to the edges of the upper surface of the second inner ring plate (4); the clamping block (15) moves in the gap between the first inner ring plate (3) and the second inner ring plate (4), and the clamping block (15) is used to limit the inner plug-in unit (14).

3. The swing reset node of modular steel structure according to claim 2, characterized in that: The connection component further includes: Bolt one (9) and bolt two (10); The inner plug-in component (14) and the energy-dissipating metal component (13) are both provided with a third through hole for the passage of the first bolt (9); the horizontal connecting plate (7) and the energy-dissipating metal component (13) are both provided with a fourth through hole for the passage of the second bolt (10); The bolt 1 (9) passes through the third through hole to connect the inner plug-in component (14) with the energy-absorbing metal component (13); The second bolt (10) passes through the fourth through hole to connect the horizontal connecting plate (7) to the energy-absorbing metal part (13).

4. The swing reset node of modular steel structure according to claim 3, characterized in that: The connection component further includes: Two shear keys (8) are respectively welded to the upper and lower ends of the horizontal connection plate (7), and the upper module column (1) and the lower module column (2) are respectively sleeved on the two shear keys (8).

5. The swing reset node of modular steel structure according to claim 1, characterized in that: The inner plug-in (14) is selected from at least one of an H-shaped steel or a hollow square steel tube.

6. The swing reset node of modular steel structure according to claim 1, characterized in that: The prestressed steel strand (11) is replaced by a prestressed steel rod or SMA rod or fiber-reinforced material.

7. The swing reset node of modular steel structure according to claim 1, characterized in that: The energy dissipation metal part (13) is selected from at least one of angle steel and T-shaped steel.

8. The swing reset node of modular steel structure according to claim 1, characterized in that: A friction plate is added between the energy-absorbing metal part (13) and the inner plug-in part (14).

9. A method for using the swing reset node of the modular steel structure according to claim 4, characterized in that: The following steps are involved: S1. Assembling the inner ring plate 1 (3), the inner ring plate 2 (4), the spring fixing plate (5), the spring (6) and the clamping block (15) into the column inner component in the factory, and installing the column inner component in the module column including the upper module column (1) and the lower module column (2); assembling the horizontal connecting plate (7), the shear key (8), the bolt 1 (9), the bolt 2 (10), the prestressed steel strand (11), the anchor (12), the energy-absorbing metal part (13), the inner plug-in unit (14) and the plug-in unit (16) into the connection component; after the assembly is completed, transporting the connection component and the module column with the column inner component to the construction site; S2, hoisting the lower module column (2), and installing the connection assembly at its upper end, wherein the plug plate (16) at the lower end of the connection assembly passes through the clamping block (15) in the lower module column (2) and is locked, thereby completing the connection between the lower module column (2) and the connection assembly; S3, hoisting the upper module column (1), aligning its lower end with the installed connecting assembly and then lowering it, the plug plate (16) at the upper end of the connecting assembly passing through the clamping block (15) inside the upper module column (1) and then locking it, thereby completing the connection between the upper module column (1) and the connecting assembly.

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