Fabricated steel frame damping joint

Abstract

The utility model relates to the technical field of steel frame damping, in particular to an assembly type steel frame damping joint which comprises a plurality of upper connecting plates installed at the bottom end of an upper column, and the upper connecting plates are evenly distributed around the axis of the upper column. The lower connecting plates are mounted at the top end of the lower column and are uniformly distributed around the axis of the lower column; the upper connecting plates and the lower connecting plates are vertically inserted in a staggered mode and coaxially and rotatably attached to each other, and the outer sides of the attached connecting plates are sleeved with a positioning ring with the annular hole pattern being a spline hole. The spline holes provide accurate positioning and restraining for the connecting plate and the damping assembly. Under the action of earthquake force, all the components can work closely and cooperatively, so that the earthquake force is uniformly dispersed into the whole node structure. The joint can be effectively prevented from generating unnecessary displacement and shaking in the vibration process through close fit of the spline holes, and the stability of the structure is ensured. The shock absorption assemblies in the sub-holes buffer and absorb earthquake force from multiple horizontal directions, so that the shock absorption assemblies can respond rapidly, earthquake energy is converted into energy in other forms to be dissipated through self deformation and energy dissipation mechanisms, and horizontal annular shock absorption is achieved.

Description

Technical Field

[0001] This invention relates to the field of steel frame vibration reduction technology, specifically a prefabricated steel frame vibration reduction node. Background Technology

[0002] In recent years, the application of steel structures has become increasingly widespread. Compared with other structural forms, steel structure buildings have superior seismic performance, experiencing less damage in various earthquakes and withstanding the test of time, rarely suffering overall failure or collapse. However, during earthquakes, steel structures often suffer localized damage, such as: brittle failure of welded connections in frame joint areas, overall and localized failure of vertical supports, cracking of column flanges and column base plates at column feet, and anchor bolt failure. Among these, joint failure is the most frequent and severe.

[0003] Currently, common measures to prevent brittle failure of joints include improving welding quality, improving bolted connection quality, and using dog-bone, pedestal, or cast steel joints. However, these traditional measures still have some drawbacks, such as significant residual deformation after earthquakes, preventing self-resetting. Therefore, to address the deterioration of damping performance due to this inability to reset, corresponding damping components are typically installed at the joints to improve damping performance.

[0004] Patent CN107675801B discloses a prefabricated steel structure beam-column connection node. A set of plate spring assemblies is installed in mounting slots on both sides of the steel beam. A concrete block, formed by grouting, is placed in the grouting space between the grouting groove and the inner wall of the rectangular steel pipe. A transition connector composed of a steel plate and a rectangular steel pipe is used, wherein the steel plate is fixed to the steel beam with high-strength bolts, and the rectangular steel pipe has an insertion part inside, with the connector inserted into the insertion part to form a partial overlap. Anchor holes are provided on the plate spring assemblies, partitions, and steel columns, and steel cables pass through the anchor holes and are fixed at both ends to the steel column and steel beam. In non-earthquake conditions, this node is a rigid connection; in earthquake conditions, it forms a movable flexible connection, effectively improving vibration damping performance.

[0005] In the aforementioned prior art, although the plate spring assembly can effectively improve the seismic performance of the node, it can only provide vibration damping in one horizontal direction. However, in actual use, vibrations occur in multiple horizontal directions. Therefore, vibration damping in only one horizontal direction is insufficient to provide comprehensive vibration protection for the node, thus limiting its vibration damping performance. It is evident that the horizontal vibration damping devices for nodes still need improvement at this stage. Summary of the Invention

[0006] To avoid and overcome the technical problems existing in the prior art, the present invention provides a prefabricated steel frame vibration damping node. The present invention can effectively achieve horizontal circumferential vibration damping.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A prefabricated steel frame vibration damping node includes multiple upper connecting plates installed at the bottom of an upper column, with each upper connecting plate evenly distributed around the axis of the upper column; it also includes multiple lower connecting plates installed at the top of a lower column, with each lower connecting plate evenly distributed around the axis of the lower column; each upper connecting plate and each lower connecting plate are staggered and inserted into each other and rotated coaxially; the outer side of the connected plate after being attached is fitted with a positioning ring with a spline hole; each pair of attached upper and lower connecting plates is inserted into a sub-hole of the spline hole, and the upper and lower connecting plates in the same sub-hole are simultaneously fixed to any hole wall of that sub-hole, with a vibration damping component sandwiched between the other hole wall and the connecting plate.

[0009] As a further embodiment of the present invention: the positioning ring includes four sets of L-shaped blocks lying on their sides and connected end to end; in two adjacent L-shaped blocks, the back plate of the first L-shaped block and the horizontal plate of the second L-shaped block are attached to each other and fixed together, and a cavity is formed between the top plate of the first L-shaped block and the vertical plate of the second L-shaped block, which constitutes the sub-hole.

[0010] As a further aspect of the present invention: the shock absorption assembly includes two parallel baffles, which abut against the corresponding hole wall and connecting plate respectively; multiple energy dissipation rods are fixedly installed between the two baffles, and each energy dissipation rod is arranged perpendicularly to the two baffles; an energy dissipation spring is coaxially sleeved on the outer side of each energy dissipation rod, and each energy dissipation spring is in a compressed state under the squeezing action of the two baffles.

[0011] As a further embodiment of the present invention: a through hole is provided on the vertical plate of the L-shaped block, one baffle of the shock absorption assembly is inserted into the through hole and fixedly connected to the back plate of the L-shaped block, and another baffle is located at the opening of the through hole and fixedly connected to the corresponding connecting plate.

[0012] As a further embodiment of the present invention: the baffle, the upper connecting plate and the lower connecting plate, which are located in the same sub-hole and are adjacent to the connecting plate, are fixedly connected to each other.

[0013] As a further embodiment of the present invention: multiple sets of crossbeam assemblies are arranged sequentially along the circumferential direction on the outer ring surface of the positioning ring; the crossbeam assembly includes two vertically arranged clamping plates fixedly installed on the base plate of the L-shaped block, and an I-beam serving as a crossbeam is clamped and fixed between the two clamping plates.

[0014] As a further embodiment of the present invention: a cavity is formed between the two clamping plates, and the web of the I-beam is inserted and clamped in the cavity.

[0015] As a further embodiment of the present invention: both clamping plates are U-shaped plates, each U-shaped plate including a main plate with its surface arranged vertically and side plates symmetrically installed on both sides of the main plate with their surfaces arranged horizontally; the two main plates form the clamping cavity, and the upper and lower flanges of the I-beam inserted into the clamping cavity are respectively fixedly connected to the four side plates.

[0016] As a further embodiment of the present invention: two ribs that are fixed to the bottom plate of the L-shaped block are installed in the U-shaped cavity of each of the two U-shaped plates.

[0017] As a further embodiment of the present invention: the bottom end of the upper column and the top end of the lower column are both equipped with end plates arranged horizontally, and each L-shaped block lies on its side between the two end plates and is fixed to the two end plates.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this invention, the spline holes provide precise positioning and constraint for the connecting plates and damping components. Under seismic forces, the components work closely together, distributing the seismic force evenly throughout the entire node structure. The tight fit of the spline holes also effectively prevents unnecessary displacement and swaying of the nodes during vibration, ensuring structural stability. The damping components within the sub-holes buffer and absorb seismic forces from multiple horizontal directions, enabling the damping components to respond quickly. Through their own deformation and energy dissipation mechanisms, they convert seismic energy into other forms of energy dissipation, thereby achieving horizontal circumferential damping. This horizontal circumferential damping design allows the building to maintain good stability under the action of seismic waves in different horizontal directions, significantly improving the overall seismic resistance of the building.

[0020] 2. The positioning ring consists of four sets of L-shaped blocks, which not only facilitates manufacturing and installation, but also makes the assembly of the positioning ring flexible, easy to transport and assemble on site. At the same time, the cavities formed by adjacent L-shaped blocks constitute sub-holes, providing precise positioning for subsequent installation of vibration damping components and connecting plates, ensuring the accuracy of the node structure.

[0021] 3. The damping components employ a combination of parallel baffles, energy-dissipating rods, and energy-dissipating springs. The energy-dissipating rods deform under seismic forces to dissipate energy, while the energy-dissipating springs further enhance the buffering effect. This design effectively converts seismic energy into heat and other forms of energy dissipation, improving damping efficiency and ensuring the safety of the building structure.

[0022] 4. Through holes are made in the vertical plate of the L-shaped block to ensure that the baffle of the damping component is firmly connected to the back plate and connecting plate of the L-shaped block. This ensures the reliable installation of the damping component in the sub-hole, optimizes the force transmission path, and enables the seismic force to be transmitted to the damping component more efficiently, thereby improving the overall damping performance.

[0023] 5. The baffle, upper connecting plate and lower connecting plate adjacent to the connecting plate in the same sub-hole are fixedly connected, which enhances the firmness of the connection between the connecting plate and the damping component, ensuring that the components work together under the action of external forces such as earthquakes, and avoiding the reduction of damping effect due to loose connection.

[0024] 6. The crossbeam assembly is arranged on the outer ring of the positioning ring, which realizes the convenient connection between the steel frame node and the crossbeam, improves construction efficiency, and enhances the overall rigidity and load-bearing capacity of the node, making the building structure more stable under horizontal and vertical loads.

[0025] 7. The clamping plates form a cavity to clamp the web of the I-beam, ensuring that the I-beam is accurately positioned and firmly installed in the beam assembly, effectively transferring the load between the beam and the node, enhancing the reliability of the node connection, and ensuring the stability of the entire steel frame structure.

[0026] 8. The U-shaped plate clamp design not only facilitates installation, but also increases the connection area by fixing the side plates to the I-beam flanges, thereby improving the bending and shear resistance of the joints and further enhancing the overall strength and stability of the steel frame structure.

[0027] 9. Ribs are installed inside the U-shaped cavity to enhance the rigidity and load-bearing capacity of the clamping plate, prevent the clamping plate from deforming under stress, ensure the stable operation of the beam assembly, and improve the reliability and durability of the entire prefabricated steel frame vibration damping node.

[0028] 10. Install end plates at the top of the upper and lower columns and fix them to the L-shaped blocks to provide a stable support foundation for the positioning ring and the entire node structure, ensuring that all components work together under stress and improving the integrity and seismic performance of the node. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 This is a schematic diagram of the split structure of the upper and lower columns in this invention.

[0031] Figure 3 This is a schematic diagram of the assembly of the upper and lower columns in this invention.

[0032] Figure 4 This is a schematic diagram of the structure of the upper end plate in this invention.

[0033] Figure 5 This is a schematic diagram of the structure of the lower end plate in this invention.

[0034] Figure 6 This is a front view of the L-shaped block in this invention.

[0035] Figure 7 This is a rear view of the L-shaped block in this invention.

[0036] Figure 8 This is a schematic diagram of the shock absorption component in this invention.

[0037] Figure 9 This is a schematic diagram of the structure of the clamping plate in this invention.

[0038] Figure 10 This is a schematic diagram of the crossbeam assembly in this invention.

[0039] In the diagram: 1. Upper column; 11. Upper end plate; 12. Upper connecting plate; 13. Shaft; 2. Lower column; 21. Lower end plate; 22. Lower connecting plate; 3. L-shaped block; 31. Top plate; 32. Vertical plate; 321. Through hole; 33. Horizontal plate; 34. Back plate; 4. Shock absorption assembly; 41. Baffle; 42. Energy dissipation rod; 43. Energy dissipation spring; 5. Crossbeam assembly; 51. Clamping plate; 511. Main plate; 512. Side plate; 52. Rib plate; 53. I-beam; 54. Support plate; 55. Fixing ring. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figures 1-10 In this embodiment of the invention, a prefabricated steel frame vibration damping node includes an upper column 1, a lower column 2, an L-shaped block 3, a vibration damping component 4, and a crossbeam component 5.

[0042] The upper column 1 is a vertically extending cuboid column. A rectangular upper end plate 11 is coaxially fixed to the bottom end of the upper column 1. A shaft 13 is coaxially fixed on the lower surface of the upper end plate 11. Four upper connecting plates 12 are evenly installed on the periphery of the shaft 13, with their surfaces arranged vertically. One side of each of the four upper connecting plates 12 is welded to the shaft 13 to form a cross-shaped structure.

[0043] The lower column 2 is a vertically extending cuboid column. A rectangular lower end plate 21 is coaxially fixed to the top of the lower column 2. Four upper connecting plates 12 are evenly installed on the upper surface of the lower end plate 21, arranged vertically, and the four upper connecting plates 12 are arranged in a cross shape symmetrical about the axis of the lower end plate 21. The four lower connecting plates 22 together form a shaft cavity into which the shaft rod 13 can be inserted.

[0044] During assembly, align the upper column 1 and the lower column 2, then align the four upper connecting plates 12 and the four lower connecting plates 22 in a staggered manner and insert them together. At this time, the shaft 13 is inserted into the shaft cavity. Rotate the upper column 1 so that the two adjacent upper connecting plates 12 and lower connecting plates 22 fit together, and at this time the upper column 1 and the lower column 2 are aligned vertically, forming a cuboid column.

[0045] Next, install the L-shaped blocks 3 and the damping components 4 one by one. Place the L-shaped blocks 3 horizontally between the two end plates, and simultaneously insert the damping components 4 into the through holes 321 of the vertical plate 32 of the L-shaped block 3. Then, use high-strength bolts to pass through the top plate 31, upper connecting plate 12, lower connecting plate 22 of the other L-shaped block 3, and one of the baffles 41 of the damping components 4 in sequence to fix the four together. Then, use high-strength bolts to pass through another baffle 41 of the damping components 4, the back plate 34 of the L-shaped block 3, and the horizontal plate 33 of the other L-shaped block 3 in sequence to fix the three together. Finally, use high-strength bolts to rotate through the end plates and the sides of the L-shaped blocks 3 in sequence to firmly fix each L-shaped block 3 between the two end plates.

[0046] By repeating the installation method described above, all four sets of shock-absorbing components 4 and four L-shaped blocks 3 can be installed.

[0047] Next, install the crossbeam assembly 5. First, fix the two clamping plates 51 and four ribs 52 into the fixing rings 55. Then, fit the fixing rings 55 into the positioning holes at the bottom of the L-shaped block 3 and fix them in the L-shaped block 3 with high-strength bolts. Then, insert the web of the I-beam 53 into the cavity formed between the two main plates 511, so that its upper flange is fixed to the side plate 512 of the clamping plate 51 with high-strength bolts. At the same time, since the lower flange of the I-beam 53 is on the same horizontal plane as the side plate 512 of the clamping plate 51, for ease of installation, this part of the flange is completely cut off. Then, a support plate 54 is used to connect the side plate 512 and the bottom flange of the I-beam 53 and is fixed with high-strength bolts.

[0048] The installation of the entire vibration damping node is carried out according to the above installation method.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fabricated steel frame seismic joint, characterized in that, It includes multiple upper connecting plates (12) installed at the bottom of the upper column (1), with each upper connecting plate (12) evenly distributed around the axis of the upper column (1); it also includes multiple lower connecting plates (22) installed at the top of the lower column (2), with each lower connecting plate (22) evenly distributed around the axis of the lower column (2); each upper connecting plate (12) and each lower connecting plate (22) are staggered and inserted into each other and rotated together on the same axis, and the outer side of the connected plate after being attached is fitted with a positioning ring with a spline hole; the upper connecting plates (12) and lower connecting plates (22) attached to each other are respectively inserted into the sub-holes of the spline hole, and the upper connecting plate (12) and lower connecting plate (22) in the same sub-hole are simultaneously fixed to any hole wall of the sub-hole, and a shock-absorbing component (4) is sandwiched between the other hole wall and the connecting plate.

2. The fabricated steel frame seismic resisting connection of claim 1, wherein, The positioning ring includes four sets of L-shaped blocks (3) lying on their sides and connected end to end; in two adjacent L-shaped blocks (3), the back plate (34) of the first L-shaped block (3) and the horizontal plate (33) of the second L-shaped block (3) are attached to each other and fixed together, and a cavity is formed between the top plate (31) of the first L-shaped block (3) and the vertical plate (32) of the second L-shaped block (3), which constitutes the sub-hole.

3. The fabricated steel frame seismic resisting connection of claim 2, wherein, The shock absorption assembly (4) includes two parallel baffles (41), which abut against the corresponding hole wall and connecting plate respectively; multiple energy dissipation rods (42) are fixedly installed between the two baffles (41), and each energy dissipation rod (42) is arranged perpendicular to the two baffles (41); each energy dissipation rod (42) is coaxially sleeved with an energy dissipation spring (43) on its outer side, and each energy dissipation spring (43) is in a compressed state under the squeezing action of the two baffles (41).

4. The fabricated steel frame seismic resisting connection of claim 3, wherein, A through hole (321) is provided on the vertical plate (32) of the L-shaped block (3). One baffle (41) of the shock absorption assembly (4) is inserted into the through hole (321) and fixed to the back plate (34) of the L-shaped block (3). Another baffle (41) is located at the opening of the through hole (321) and fixed to the corresponding connecting plate.

5. The fabricated steel frame seismic resisting connection of claim 4, wherein, The baffle (41), the upper connecting plate (12), and the lower connecting plate (22), which are located in the same sub-hole and are adjacent to the connecting plate, are fixedly connected to each other.

6. The fabricated steel frame seismic resisting connection of any one of claims 2-5, wherein, Multiple sets of crossbeam assemblies (5) are arranged sequentially along the circumferential direction on the outer ring surface of the positioning ring; the crossbeam assembly (5) includes two vertically arranged clamping plates (51) fixedly installed on the base plate of the L-shaped block (3), and an I-beam (53) serving as a crossbeam is clamped and fixed between the two clamping plates (51).

7. The fabricated steel frame seismic resisting connection of claim 6, wherein, A cavity is formed between the two clamping plates (51), and the web of the I-beam (53) is inserted and clamped in the cavity.

8. The fabricated steel frame seismic resisting connection of claim 7, wherein, Both clamping plates (51) are U-shaped plates. The U-shaped plate includes a main plate (511) with its surface arranged vertically and side plates (512) symmetrically installed on both sides of the main plate (511) with their surfaces arranged horizontally. The two main plates (511) form the clamping cavity, and the upper and lower flanges of the I-beam (53) inserted in the clamping cavity are respectively fixed to the four side plates (512).

9. The fabricated steel frame seismic resisting connection of claim 8, wherein, Two ribs (52) are installed in the U-shaped cavities of the two U-shaped plates and are fixed to each other with the bottom plate of the L-shaped block (3).

10. The fabricated steel frame seismic resisting connection of claim 9, wherein, The bottom end of the upper column (1) and the top end of the lower column (2) are provided with end plates horizontally arranged on the plate surface, and each L-shaped block (3) is horizontally arranged between the two end plates and fixed with the two end plates.

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