A steel pipe seismic isolation support with a lead core and a stiffening ring

Abstract

The utility model relates to the technical field of building shock insulation, and discloses a stiffened ring lead core steel pipe shock insulation support, which comprises a steel pipe, the upper and lower ends of the steel pipe are fixedly connected with connecting steel plates, the top end of the connecting steel plate on the lower side is fixedly connected with two support plates one, the top end of each of the two support plates one is fixedly connected with two support rods, the outer side of each of the two support rods is slidably connected with a connecting block, a screw rod is threadedly connected in the connecting block, a small bolt is threadedly connected to the outer side of the screw rod, the top end of the connecting block is fixedly connected with two fixed columns, and the top end of each of the two fixed columns is fixedly connected with a connecting ring. In the utility model, the ground beam, the support plate and the damper and other components work together to realize shock resistance and buffering, the damper is deformed to store energy and then releases the energy under the action of earthquake vibration, pushes the support plate to reset, the sliding column is prevented from being deviated, can absorb earthquake energy, provides auxiliary support for the device, reduces structural response, and improves the seismic safety of the building.

Description

Technical Field

[0001] This utility model relates to the field of building seismic isolation technology, and in particular to a stiffened ring lead-core steel pipe seismic isolation bearing. Background Technology

[0002] Seismic isolation bearings are key damping devices connecting the superstructure and foundation of a building. They are core components of seismic resistance technology in civil engineering. Through their special structure, they absorb and dissipate seismic energy by deforming during an earthquake, blocking the transmission of vibration to the upper structure and significantly reducing the building's sway amplitude and stress. Common types include rubber seismic isolation bearings, lead-core seismic isolation bearings, and friction pendulum seismic isolation bearings. They are widely used in important buildings such as hospitals, schools, and high-rise buildings, and can significantly improve the seismic safety of structures and reduce earthquake damage.

[0003] The working principle of seismic isolation bearings is to reduce vibration by changing the force path of the structure. During an earthquake, the bearings use their special structure to "flexibly separate" the superstructure of the building from the foundation. When the foundation shakes with the earthquake, the bearings absorb the vibration energy through elastic deformation, frictional energy dissipation, or plastic yielding, which greatly reduces the seismic force and displacement transmitted upward, so that the superstructure only shakes slightly, thereby protecting the safety of the main building and internal facilities. It is the core of the "soft overcoming hard" seismic technology.

[0004] In existing technologies, some seismic isolation bearings are subjected to complex vibrations from seismic waves during operation. The bearings may be subjected to severe horizontal impacts instantaneously. Relying solely on the energy dissipation of the bearings themselves can easily lead to overload failure, making it difficult to effectively isolate seismic energy. A large amount of vibration is directly transmitted to the superstructure, causing a surge in stress on key components such as beams and columns, and damaging the superstructure. To address this issue, a stiffened ring lead-core steel tube seismic isolation bearing is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a stiffened ring lead-core steel pipe seismic isolation bearing, which aims to improve the problem that some seismic isolation bearings in the prior art are subjected to complex vibrations of seismic waves during operation. The bearings will be subjected to severe horizontal impacts instantly. Relying solely on the energy dissipation of the bearings themselves is prone to failure due to overload. This will make it difficult to effectively isolate seismic energy, and a large amount of vibration will be directly transmitted to the superstructure, causing a sharp increase in the stress on key components such as beams and columns, and causing damage to the superstructure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A stiffened ring lead-core steel pipe seismic isolation bearing includes a steel pipe, with connecting steel plates fixedly connected to both the upper and lower ends of the steel pipe. Two support plates are fixedly connected to the top of the lower connecting steel plate, and two support rods are fixedly connected to the top of each of the two support plates. Connecting blocks are slidably connected to the outer sides of the two support rods. A lead screw is threaded into the internal part of each connecting block, and a small bolt is threaded into the outer side of the lead screw. Two fixing columns are fixedly connected to the top of each connecting block, and a connecting ring is fixedly connected to the top of each of the two fixing columns. A damper is fixedly connected to the top of each connecting ring, and a second support plate is fixedly connected to the top of the damper. Two sliding columns are fixedly connected to the bottom end of the second support plate.

[0008] As a further description of the above technical solution:

[0009] A lead core block is installed inside the steel pipe, and multiple external stiffening rings are fixedly connected to the outside of the steel pipe;

[0010] As a further description of the above technical solution:

[0011] The bottom end of the small bolt contacts the top end of the connecting block, and the bottom end of the lead screw is fixedly connected to the top end of the support plate.

[0012] As a further description of the above technical solution:

[0013] The outer side of the sliding column is slidably connected to the inner side of the fixed column, and the outer side of the sliding column is slidably connected to the outer side of the fixed column.

[0014] As a further description of the above technical solution:

[0015] The top of the second support plate is installed at the bottom of the upper connecting steel plate, and multiple high-strength bolts are threaded inside both connecting steel plates.

[0016] As a further description of the above technical solution:

[0017] The top end of the lead core contacts the bottom end of the upper connecting steel plate, and the bottom end of the lead core contacts the top end of the lower connecting steel plate.

[0018] This utility model has the following beneficial effects:

[0019] In this invention, seismic buffering is achieved through the synergistic action of components such as the ground beam, connecting steel plate, second support plate, fixed column, connecting ring, sliding column, and damper. When the seismic vibration is transmitted to the connecting steel plate, the force causes the damper to undergo elastic deformation and store potential energy through the second support plate. After reaching the maximum deformation, the damper releases energy to push the second support plate back to its original position. The sliding column guides within the fixed column to prevent displacement. At the same time, the screw rod and bolts connect the fixed column and the support rod, enhancing overall stability, absorbing seismic energy, reducing the acceleration response of the superstructure, and providing auxiliary support for the device, thereby protecting the main building and internal facilities and improving seismic safety. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a stiffened ring lead-core steel pipe seismic isolation bearing proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the lead core block of a stiffened ring lead core steel pipe seismic isolation bearing proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the connecting block of a stiffened ring lead-core steel pipe seismic isolation bearing proposed in this utility model;

[0023] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0024] Legend:

[0025] 1. Steel pipe block; 2. Connecting steel plate; 3. Support plate one; 4. Support rod; 5. Connecting block; 6. Screw rod; 7. Small bolt; 8. Fixed column; 9. Connecting ring; 10. Sliding column; 11. Damper; 12. Support plate two; 13. High-strength bolt; 14. Lead core block; 15. External stiffening ring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figures 1 to 3This utility model provides an embodiment of a reinforced ring lead-core steel pipe seismic isolation bearing, comprising a steel pipe block 1. The steel pipe block 1 serves as the core load-bearing structure of the entire seismic isolation bearing, providing installation space and external protection for the internal lead-core block 14, while also bearing the vertical load transmitted by the upper and lower connecting steel plates 2, thus ensuring the overall structural stability of the bearing. Connecting steel plates 2 are fixedly connected to both ends of the steel pipe block 1. The connecting steel plates 2 connect the bearing to the external structure, and the bearing is fixed to the corresponding structure by high-strength bolts 13, ensuring effective load transmission. Two support plates 3 are fixedly connected to the top of the lower connecting steel plate 2. The support plates 3 provide installation foundations for components such as support rods 4 and lead screws 6, distributing the force transmitted by the lower connecting steel plate 2 to other related components, enhancing the overall stability of the buffer auxiliary components.

[0028] Two support rods 4 are fixedly connected to the top of each of the two support plates 3, serving as guides and supports for the connecting block 5, restricting its lateral displacement, ensuring that the connecting block 5 can only move along the direction of the support rods 4, and providing stable support for the connecting block 5. Connecting blocks 5 are slidably connected to the outer sides of the two support rods 4, providing support for the assembly through the interaction between the connecting blocks 5 and the support rods 4. A lead screw 6 is threaded internally connected to the connecting block 5, and a small bolt 7 is threaded externally connected to the lead screw 6. The lead screw 6 and the small bolt 7 work together to connect the connecting block 5 and the support rods 4.

[0029] Two fixed posts 8 are fixedly connected to the top of the connecting block 5. The top of the fixed posts 8 is connected to the connecting ring 9, and the bottom is fixed to the connecting block 5. This provides a sliding track for the sliding post 10, transmits the force from the connecting block 5 to the connecting ring 9, and cooperates with the sliding post 10 to achieve the telescopic function. Each of the two fixed posts 8 has a fixed connecting ring 9 at its top, connecting the fixed post 8 and the damper 11, which transmits the force from the fixed post 8 to the damper 11, while ensuring the stability of the connection between the damper 11 and the fixed post 8. The top of the connecting ring 9 has a fixed damper 11. The damper 11 is an important energy-dissipating component in the buffer auxiliary assembly. The damper 11 dissipates vibration energy through internal damping, reducing the impact of vibration on the structure.

[0030] A second support plate 12 is fixedly connected to the top of the damper 11. The top of the second support plate 12 is connected to the upper connecting steel plate 2, and the bottom end is connected to the damper 11 and the sliding column 10. This distributes the force transmitted by the upper connecting steel plate 2 to the damper 11 and the sliding column 10, while also providing installation support for these components. Two sliding columns 10 are fixedly connected to the bottom end of the second support plate 12. The sliding columns 10 can slide along the fixed column 8, cooperating with the fixed column 8 to realize the extension and retraction of the buffer auxiliary component, thereby buffering part of the vibration energy.

[0031] Reference Figures 2 to 4Inside the steel pipe block 1, a lead core block 14 is installed. The support effectively isolates the transmission of seismic energy to the upper structure through the plastic deformation of the lead core block 14 and the elastic recovery of the steel. This mechanism not only protects the main structure from damage but also avoids the risk of resonance by extending the structure's natural vibration period, ensuring the safety and stability of the building under extreme seismic conditions. The energy dissipation capacity of the lead core block 14... E d Determined by the work of plastic deformation:

[0032] E d = σ y × ε p × V Pb

[0033] in:

[0034] σ y Yield strength of lead (pure lead) σ y ≈7MPa, suitable for most structural designs and damper performance analysis (11).

[0035] ε p To allow plastic strain (take) ε p =200% ensures low-cycle fatigue performance);

[0036] V Pb = ×H is the volume of the lead core ( d Pb (where H is the diameter of the lead core and H is the height).

[0037] Constraint condition: The ratio of the constraint efficiency η of the steel pipe on the lead core to the diameter λ = Relationship:

[0038] η=1−e −kλ (k=2.5 is an empirical coefficient) Derivation conclusion:

[0039] When λ < 0.3, η < 0.5, insufficient constraint leads to easy extrusion of the lead core;

[0040] When λ > 0.5, η > 0.9, but the wall thickness of the steel pipe needs to be increased significantly (economic efficiency deteriorates).

[0041] Multiple stiffening rings 15 are fixedly connected to the outer side of the steel pipe block 1. The stiffening rings 15 can enhance the overall rigidity and load-bearing capacity of the steel pipe block 1, prevent excessive deformation of the steel pipe block 1 when subjected to load or vibration, and improve the structural stability and service life of the support. The bottom end of the small bolt 7 contacts the top end of the connecting block 5, and the bottom end of the threaded rod 6 is fixedly connected to the top end of the support plate 3, making the connection between the connecting block 5 and the support rod 4 more stable. The outer side of the sliding column 10 is slidably connected to the inner side of the fixed column 8, providing space for the sliding column 10 to move, so that it can work in conjunction with the damper 11 to complete the buffering when subjected to external force.

[0042] The top of the support plate 12 is installed on the bottom of the upper connecting steel plate 2. Both connecting steel plates 2 have multiple high-strength bolts 13 threaded inside for securely connecting them to the external structure, ensuring the reliability and stability of the connection and allowing the support to be firmly installed in its corresponding position, thus ensuring effective load transfer. The top of the lead core block 14 contacts the bottom of the upper connecting steel plate 2, and the bottom of the lead core block 14 contacts the top of the lower connecting steel plate 2. The lead core block 14 reduces the force transmitted from the lower connecting steel plate 2 to the upper connecting steel plate 2.

[0043] Working principle: When the ground beam transmits external vibrations to the connecting steel plate 2, the connecting steel plate 2 receives the force and transmits it to the support plate 12. The support plate 12 receives the force and, in conjunction with the fixed column 8 and the connecting ring 9, causes the damper 11 to undergo elastic deformation, storing elastic potential energy. When the force on the damper 11 reaches its maximum elastic deformation value, the damper 11 releases its elastic potential energy, causing the support plate 12 to move upward. Simultaneously with the movement of the support plate 12, the sliding column 10 slides inside the fixed column 8, following the movement of the support plate 12, preventing the support plate 12 from shifting during movement. The components include the fixed column 8, the connecting ring 9, the sliding column 10, and the damper. Device 11 and support plate 2 work together to buffer the device, while screw rod 6 and small bolt 7 connect fixed column 8 and support rod 4, which facilitates the installation of components and provides auxiliary support for the device. Through the synergistic effect of each component, the device can further absorb and dissipate seismic energy during an earthquake by virtue of its elastic deformation and energy dissipation characteristics, limit the displacement of the seismic isolation bearing, prevent it from being damaged due to excessive displacement, reduce the acceleration response of the superstructure, reduce the internal force of structural components, improve the overall seismic performance of the building, reduce the damage of earthquakes to the internal equipment and decoration of the building, and better ensure the safety and integrity of the building during an earthquake.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stiffened ring lead-core steel pipe seismic isolation bearing, comprising a steel pipe block (1), characterized in that: The upper and lower ends of the steel pipe block (1) are fixedly connected to connecting steel plates (2). The top of the lower connecting steel plate (2) is fixedly connected to two support plates (3). The top of the two support plates (3) is fixedly connected to two support rods (4). The outer sides of the two support rods (4) are slidably connected to connecting blocks (5). The inner thread of the connecting block (5) is connected to a screw rod (6). The outer thread of the screw rod (6) is connected to a small bolt (7). The top of the connecting block (5) is fixedly connected to two fixing columns (8). The top of the two fixing columns (8) is fixedly connected to a connecting ring (9). The top of the connecting ring (9) is fixedly connected to a damper (11). The top of the damper (11) is fixedly connected to a support plate (12). The bottom of the support plate (12) is fixedly connected to two sliding columns (10).

2. The stiffened ring lead-core steel pipe seismic isolation bearing according to claim 1, characterized in that: A lead core block (14) is installed inside the steel pipe block (1), and multiple external stiffening rings (15) are fixedly connected to the outside of the steel pipe block (1).

3. The stiffened ring lead-core steel pipe seismic isolation bearing according to claim 1, characterized in that: The bottom end of the small bolt (7) is in contact with the top end of the connecting block (5), and the bottom end of the screw (6) is fixedly connected to the top end of the support plate (3).

4. The stiffened ring lead-core steel pipe seismic isolation bearing according to claim 1, characterized in that: The outer side of the sliding column (10) is slidably connected to the inner side of the fixed column (8), and the outer side of the sliding column (10) is slidably connected to the outer side of the fixed column (8).

5. A stiffened ring lead-core steel pipe seismic isolation bearing according to claim 1, characterized in that: The top of the second support plate (12) is installed at the bottom of the upper connecting steel plate (2), and multiple high-strength bolts (13) are threaded inside both connecting steel plates (2).

6. A stiffened ring lead-core steel pipe seismic isolation bearing according to claim 2, characterized in that: The top end of the lead core block (14) is in contact with the bottom end of the upper connecting steel plate (2), and the bottom end of the lead core block (14) is in contact with the top end of the lower connecting steel plate (2).

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