A seismic isolation device suitable for near-fault

Abstract

The present invention belongs to the technical fields of architecture, bridges, lifeline engineering, etc., and specifically relates to a seismic isolation device suitable for near-faults, including a seismic isolation rubber bearing, a new type of sliding plate bearing, and a lateral baffle system. The new type of sliding plate bearing includes a bearing bottom plate, an upper cylinder, and a lower cylinder. The lateral baffle system includes lateral baffles arranged on the bearing bottom plate. A buffer rubber block is arranged at the inner bottom of the upper cylinder. A plurality of inner cylinders are arranged in the upper cylinder. Rubber balls and elastic elements are arranged in the inner cylinders. A one-way opening and closing device is arranged at the opening of the inner cylinder. The one-way opening and closing device abuts against the buffer rubber block. When a minor earthquake occurs, the seismic isolation rubber bearing at the upper part of the seismic isolation device of the present invention acts alone. When a near-field earthquake with large horizontal displacement and constant vertical settlement difference occurs, the seismic isolation rubber bearing and the new type of sliding plate bearing act together to protect the safety of the upper seismic isolation structure during an earthquake.

Description

Technical Field

[0001] The present invention relates to a seismic isolation device for building engineering, bridge engineering, equipment engineering and major lifeline engineering, belonging to the technical fields of building, bridge and lifeline engineering, etc., and particularly relates to a seismic isolation device suitable for near-fault areas. Background Art

[0002] In building engineering, bridge engineering, equipment engineering and lifeline engineering, after the installation of rubber seismic isolation bearings, for ordinary earthquakes, it can play a very good role in reducing earthquakes and protecting the safety of the superstructure and equipment. Near-fault earthquakes, as a special type of earthquake, cause more serious disasters compared with ordinary earthquakes. Near-fault earthquakes have two obvious characteristics: on the one hand, they have long-period components; on the other hand, ground fissures will form on the ground after the earthquake, and the soil on both sides of the ground fissures will have vertical fissures with a certain width and a constant vertical height difference after the earthquake; the former will cause excessive horizontal displacement of the seismic isolation structure, and for ordinary seismic isolation devices (such as seismic isolation rubber bearings), some bearings will have constant horizontal lateral curvature and the seismic isolation structure may tilt. In order to enable the seismic isolation structure in the near-fault area to give full play to the seismic isolation effect, it is necessary to develop a new type of seismic isolation device with a large horizontal displacement and the ability to adapt to vertical and horizontal constant displacement differences. Summary of the Invention

[0003] The purpose of the present invention is to provide a seismic isolation device suitable for near-fault earthquakes in building seismic isolation structures, bridge seismic isolation structures, equipment seismic isolation projects, and lifeline seismic isolation projects, with a large horizontal deformation and the ability to adapt to vertical constant displacement differences.

[0004] The present invention realizes this purpose through the following technical solutions:

[0005] A seismic isolation device suitable for near-fault areas includes a seismic isolation rubber bearing, a new type of sliding plate bearing and a lateral baffle system. The new type of sliding plate bearing includes a bearing bottom plate and a sleeve system slidably arranged on the bearing bottom plate. The sleeve system includes an upper cylinder and a lower cylinder. The seismic isolation rubber bearing is arranged on the top of the upper cylinder. The lateral baffle system includes a lateral baffle fixedly arranged on the bearing bottom plate. The lateral baffle is arranged around the sleeve system to limit the sliding distance of the sleeve system. A buffer rubber block is arranged at the inner bottom of the upper cylinder. A plurality of inner cylinders are arranged in the upper cylinder. Rubber balls and elastic elements capable of ejecting the rubber balls are arranged in the inner cylinders. A one-way opening and closing device capable of automatically closing is arranged at the opening of the inner cylinder. The one-way opening and closing device abuts against the buffer rubber block.

[0006] Furthermore, the lateral baffle system further includes a force arm plate. The bottom of the force arm plate is fixedly connected to the bearing bottom plate, and the side of the force arm plate is connected to the outer wall of the lower cylinder.

[0007] Furthermore, a stainless - steel mirror panel is provided on the base plate of the support, and a polytetrafluoroethylene plate is embedded at the outer bottom of the lower cylinder body. The lower cylinder body slides on the stainless - steel mirror panel through the polytetrafluoroethylene plate.

[0008] Preferably, the force - arm plate is in an X shape.

[0009] Furthermore, the stainless - steel mirror panel is arranged at the middle position of the base plate of the support. The periphery of the stainless - steel mirror panel is parallel to the periphery of the base plate of the support, and the lateral baffle is arranged at the periphery of the stainless - steel mirror panel.

[0010] Preferably, the bottom of the force - arm plate is fixedly connected to the base plate of the support through a bottom connecting plate, and the side of the force - arm plate is connected to the outer wall of the lower cylinder body through a lateral connecting plate.

[0011] Furthermore, the one - way opening - closing device includes a hinge plate. The hinge plate is fixed at the opening of the inner cylinder body through a pin shaft, and a one - way restoring spring is arranged on the pin shaft.

[0012] Furthermore, a protruding part is arranged on the outer side wall of the upper cylinder body, and a groove channel matching the protruding part is arranged on the inner side wall of the lower cylinder body.

[0013] Furthermore, the lower cylinder body includes an inner cylinder and an outer side - wall plate surrounding the outer side of the inner cylinder. Reinforcing ribs are arranged between the outer side - wall plate and the inner cylinder.

[0014] Furthermore, a sealing plate with openings is arranged at the opening of the upper cylinder body, and the sealing plate abuts against a buffer rubber block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The seismic isolation device of the present invention suitable for near - fault earthquakes, when a near - fault earthquake with large horizontal displacement occurs, the new sliding - plate support and the upper seismic isolation rubber support act together to resist the near - fault earthquake with large horizontal displacement. When the whole device moves upward relative to the lower fixed ground, the one - way opening - closing device is opened, and the elastic element in the inner cylinder body ejects the rubber ball into the lower cylinder body. And the one - way opening - closing device in the inner cylinder body automatically closes, so that the vertical height of the whole device will increase, which can effectively prevent the upper seismic isolation structure from tilting caused by the ground height difference formed by the ground sliding during the near - fault earthquake. The functions of each part in this device are clear and simple, and it is suitable for making in sets. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the seismic isolation device of the present invention.

[0018] Figure 2 is Figure 1Schematic diagram of the structure of the seismic isolation rubber bearing therein.

[0019] Figure 3 is Figure 1 Schematic diagram of the structure of the new sliding plate bearing therein.

[0020] Figure 4 is Figure 2 Cross-sectional view of the new sliding plate bearing of

[0021] Figure 5 is Figure 2 Schematic diagram of the structure of the inner cylinder therein.

[0022] Figure 6 is Figure 1 Schematic diagram of the structure of the lateral baffle system therein.

[0023] Figure 7 is Figure 2 Schematic diagram of the structure of the upper cylinder therein.

[0024] Figure 8 is Figure 2 Schematic diagram of the structure of the middle and lower cylinders therein. Detailed implementation manners

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Embodiment 1.

[0027] As Figures 1-6 shown, this embodiment provides a seismic isolation device suitable for near-faults, including a seismic isolation rubber bearing 1, a new sliding plate bearing 2 and a lateral baffle system 3. The new sliding plate bearing 2 includes a bearing bottom plate 27 and a sleeve system slidably disposed on the bearing bottom plate 27. The sleeve system includes an upper cylinder 21 and a lower cylinder 23. The seismic isolation rubber bearing 1 is disposed on the top of the upper cylinder 21. The lateral baffle system 3 includes a lateral baffle 34 fixedly disposed on the bearing bottom plate 27. The lateral baffle 34 is disposed around the sleeve system for restricting the sliding distance of the sleeve system. A buffer rubber block 24 is disposed at the inner bottom of the upper cylinder 21. A plurality of inner cylinders 22 are disposed in the upper cylinder 21. A rubber ball 223 and an elastic element 222 capable of ejecting the rubber ball 223 are disposed in the inner cylinder 22. A one-way opening and closing device capable of automatically closing is disposed at the opening of the inner cylinder 22. The one-way opening and closing device abuts against the buffer rubber block 24.

[0028] The seismic isolation device suitable for near-fault of the present invention, when the isolated structure is subjected to a horizontal earthquake with low energy, the upper seismic isolation rubber bearing 1 of the device acts alone, generates a horizontal displacement during the earthquake, and resists the action of the earthquake; however, for near-faults, horizontal earthquakes with relatively large energy often occur. When such an earthquake occurs, the upper seismic isolation rubber bearing 1 first undergoes a horizontal displacement. When the earthquake energy reaches a certain level, the new sliding plate bearing 2 under the seismic isolation rubber bearing 1 slides relative to the bearing bottom plate 27, and the deformation of the seismic isolation rubber bearing 1 is restored. When the new sliding plate bearing 2 slides to the edge of the lateral baffle 34 of the lateral baffle system 3, the new sliding plate bearing 2 stops sliding, and the upper seismic isolation rubber bearing 1 starts to undergo horizontal deformation again to jointly resist the action of the near-field horizontal large earthquake. At this time, the total deformation displacement of this bearing is the sum of the maximum horizontal deformation capacity of the seismic isolation rubber bearing 1 and the maximum sliding displacement of the new sliding plate bearing 2; when a near-field earthquake occurs, generally a vertical ground crack with a certain width will be formed along the depth direction of the ground layer. The soil on both sides of the crack will also undergo vertical sliding, forming a certain vertical height difference on both sides of the crack. The horizontal width of this crack can be borne by the horizontal sliding displacement of the new sliding plate bearing 2; when the ground undergoes a vertical sliding displacement, since the structure above the seismic isolation bearing is an integral body, when the lower fixed ground of this new device slides downward, the one-way opening and closing device in the inner cylinder 22 will open, and the elastic element 222 will push the rubber ball 223 out of the inner cylinder 22. After the rubber ball 223 is pushed out, the one-way opening and closing device automatically closes. The rubber balls 223 ejected from each inner cylinder 22 form a new vertical bearing layer on the buffer rubber block 24, and the vertical height of this device will increase, ensuring that the upper structure of the device is horizontally placed without tilting.

[0029] Among them, as Figure 6 shown, the lateral baffle system 3 further includes a force arm plate 32. The bottom of the force arm plate 32 is fixedly connected to the bearing bottom plate 27, and the side of the force arm plate 32 is connected to the outer wall of the lower cylinder 23. In this embodiment, the force arm plate 32 is in an X shape. When a large earthquake occurs, the X-shaped force arm plate 32 is prone to breakage and fracture at the weakest part, facilitating the sliding of the new sliding plate bearing 2.

[0030] Among them, as Figures 3-4 shown, a stainless steel mirror surface plate 26 is provided on the bearing bottom plate 27, and a polytetrafluoroethylene plate 25 is embedded at the outer bottom of the lower cylinder 23. The lower cylinder 23 slides on the stainless steel mirror surface plate 26 through the polytetrafluoroethylene plate 25, facilitating the horizontal sliding of the new sliding plate bearing 2.

[0031] Among them, the stainless-steel mirror panel 26 is arranged at the middle position of the support base plate 27. The periphery of the stainless-steel mirror panel 26 is arranged parallel to the periphery of the support base plate 27. The lateral baffle 34 is arranged at the periphery of the stainless-steel mirror panel 26, so that the new sliding plate support 2 can slide on the support base plate 27. When the new sliding plate support 2 slides to the edge of the lateral baffle 34 of the lateral baffle system 3, the new sliding plate support 2 stops sliding, and the upper isolation rubber support 1 can resume shear deformation to resist greater horizontal displacement seismic energy behind.

[0032] Among them, the bottom of the force arm plate 32 is fixedly connected to the support base plate 27 through the bottom connecting plate 33, and the side of the force arm plate 32 is connected to the outer wall of the lower cylinder body 23 through the lateral connecting plate 31.

[0033] Among them, as Figure 4 shown, the one-way opening and closing device includes a hinge plate 226. The hinge plate 226 is fixed at the opening of the inner cylinder body 22 through a pin shaft 225. A one-way recovery spring 224 is arranged on the pin shaft 225. When the rubber ball 223 in the inner cylinder body 22 is pushed out, the hinge plate 226 automatically closes due to the recovery force of the one-way recovery spring 224.

[0034] Among them, as Figure 7 shown, a convex portion 214 is arranged on the outer side wall of the upper cylinder body 21, and a groove 235 matching the convex portion 214 is arranged on the inner side wall of the lower cylinder body 23. The upper cylinder body 21 and the lower cylinder body 23 can slide relative to each other through the convex portion 214 and the groove 235. This structural setting can prevent the upper cylinder body 21 from rotating horizontally relative to the lower cylinder body 23.

[0035] Among them, as Figure 8 shown, the lower cylinder body 23 includes an inner cylinder 234 and an outer side wall plate 232 surrounding the outside of the inner cylinder 234. A reinforcing rib 233 is arranged between the outer side wall plate 232 and the inner cylinder 234. This structure is convenient for connecting with the lateral baffle system 3.

[0036] Among them, a sealing plate 213 with openings is arranged at the opening of the upper cylinder body 21. The sealing plate 213 abuts against the buffer rubber block 24. When the rubber balls 223 in each inner cylinder body 22 pop out, a new vertical bearing layer will be formed between the buffer rubber block 24 and the lower sealing plate 213 with openings.

[0037] The installation method of the seismic isolation device of the present invention is as follows: First, connect the support bottom plate 27 in the new sliding plate support 2 to the fixed ground structure. The stainless steel mirror panel 26 is placed on the upper surface of the support bottom plate 27, centered with it and parallel to the outer side. Place the lower cylinder 23 with the nested polytetrafluoroethylene plate 25 at the exact center position of the stainless steel mirror panel 26, and keep the polytetrafluoroethylene plate 25 in close contact with the stainless steel mirror panel 26. Put the buffer rubber block 24 into the bottom inside the cylinder of the lower cylinder 23. Next, assemble the inner cylinder 22. Place the elastic element 222 at the bottom inside the cylinder of the inner cylinder 22. At the opening of the inner cylinder 22, combine the one-way return spring 224, the pin shaft 225, and the hinge plate 226 together to form a one-way opening and closing device at the outlet of the inner cylinder 22. Put a sufficient number of rubber balls 223 into the inner cavity of the inner cylinder 22 and keep the spring 222 in a compressed state. Place the assembled inner cylinder 22 into the inner cavity of the upper cylinder 21 and fix it at the top of the inner cylinder 22 with bolts. Then, arrange a certain number of inner cylinders 22 in a circular pattern in the inner cavity of the upper cylinder 21 in sequence. Connect the lower perforated sealing plate 213 to the bottom of the upper cylinder 21, and pass the protruding part 214 of the upper cylinder 21 into the groove 235 of the inner cylinder 234 of the lower cylinder 23 to form an up-and-down sliding channel system, and keep the lower bottom surface of the hinge plate 226 in the inner cylinder 22 in close contact with the upper surface of the buffer rubber block 24 placed in the lower cylinder 23. Then, assemble the seismic isolation rubber support 1. Connect the upper connecting plate 11 and the upper connecting plate 13 of the seismic isolation rubber support 1 to the upper surface and the lower surface of the seismic isolation rubber support body 12 respectively with bolts to form the whole seismic isolation rubber support 1. Connect the lower connecting plate 13 of the seismic isolation rubber support 1 to the upper connecting plate 211 of the upper cylinder 21 with bolts. Connect the upper connecting plate 11 of the seismic isolation rubber support 1 to the lower part of the seismic isolation structure. At the same time, connect the lateral baffle system 3 to the outer side wall plate 232 of the lower cylinder 23 and the support bottom plate 27 respectively to form the present device - a new type of seismic isolation device suitable for near-faults.

[0038] Those of ordinary skill in the art should understand that: The discussion of any above embodiment is only exemplary and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A seismic isolation device suitable for near-fault, characterized in that, It includes a seismic isolation rubber bearing, a new type of sliding plate bearing and a lateral baffle system. The new type of sliding plate bearing includes a bearing bottom plate and a sleeve system slidably arranged on the bearing bottom plate. The sleeve system includes an upper cylinder and a lower cylinder. The seismic isolation rubber bearing is arranged at the top of the upper cylinder. The lateral baffle system includes a lateral baffle fixedly arranged on the bearing bottom plate. The lateral baffle is arranged around the sleeve system for restricting the sliding distance of the sleeve system. A buffer rubber block is arranged at the inner bottom of the upper cylinder. A number of inner cylinders are arranged in the upper cylinder. Rubber balls and elastic elements for ejecting the rubber balls are arranged in the inner cylinders. A one-way opening and closing device that can automatically close is arranged at the opening of the inner cylinder. The one-way opening and closing device abuts against the buffer rubber block.

2. The seismic isolation device suitable for near-fault as claimed in claim 1, wherein The lateral baffle system further includes a force arm plate. The bottom of the force arm plate is fixedly connected to the bearing bottom plate, and the side of the force arm plate is connected to the outer wall of the lower cylinder.

3. The seismic isolation device suitable for near-fault as described in claim 2, characterized in that, A stainless steel mirror panel is arranged on the bearing bottom plate. A polytetrafluoroethylene plate is embedded at the outer bottom of the lower cylinder. The lower cylinder slides on the stainless steel mirror panel through the polytetrafluoroethylene plate.

4. The seismic isolation device suitable for near-fault as claimed in claim 2, wherein The force arm plate is in an X shape.

5. The seismic isolation device suitable for near-fault as described in claim 3, characterized in that, The stainless steel mirror panel is arranged at the middle position of the bearing bottom plate. The periphery of the stainless steel mirror panel is arranged parallel to the periphery of the bearing bottom plate. The lateral baffle is arranged at the periphery of the stainless steel mirror panel.

6. The seismic isolation device suitable for near-fault as claimed in claim 2, characterized in that, The bottom of the force arm plate is fixedly connected to the bearing bottom plate through a bottom connecting plate, and the side of the force arm plate is connected to the outer wall of the lower cylinder through a lateral connecting plate.

7. The seismic isolation device suitable for near-fault as described in claim 1, wherein The one-way opening and closing device includes a hinge plate. The hinge plate is fixed at the opening of the inner cylinder through a pin shaft. A one-way restoring spring is arranged on the pin shaft.

8. The seismic isolation device suitable for near-fault as described in claim 1, characterized in that, A protrusion is arranged on the outer side wall of the upper cylinder, and a groove channel matching the protrusion is arranged on the inner side wall of the lower cylinder.

9. The seismic isolation device suitable for near-fault as claimed in claim 1, wherein The lower cylinder includes an inner cylinder and an outer side wall plate surrounding the outside of the inner cylinder. Reinforcing ribs are arranged between the outer side wall plate and the inner cylinder.

10. The seismic isolation device suitable for near-fault as claimed in claim 1, wherein A sealing plate with openings is arranged at the opening of the upper cylinder. The sealing plate abuts against the buffer rubber block.

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