Vertical impact-free shock insulation support
By designing vertical impact-free shock-insulating support, the lifting gap between the fastener and the steps and the deformation gap between the elastic buffer body are solved, and the problem of insufficient tensile performance of the earthquake-insulating rubber support in high-rise buildings is achieved. The stable performance is improved under vertical tension and horizontal shear force, with a simple structure, small size and low cost.
Patent Information
- Application Number
- CN202420894815.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The tensile resistance performance of the earthquake-isolated rubber bearing in high-rise buildings is insufficient, resulting in a large overturning moment under vertical tension. The existing method is controlled by setting a tensile limit device, but the device is large in size and affects the horizontal stiffness. It is only used as the second line of defense and does not participate in the solution to the tensile stress exceeding limit problem during the design stage.
Design a vertical impact-free shock-isolating support, which includes two piers and a vibration isolation body located between the piers. The end of the piers is equipped with a flange and a countersink, the fastener is connected through a countersink, and the fastener head is The lifting gap is set between the part and the steps, the anchor bar and the fastener are connected through counters, and the deformation gap is set between the head of the fastener and the elastic buffer body, which can release vertical displacement and reduce the pulling force when the tension is received. and fight against horizontal shear forces.
Effectively reduce the pulling force of the bearing, avoid rigid collision contact, ensure that the bearing does not slip, the structure is simple, the size is small, and the cost is low, and it can keep the bearing stable during horizontal shear deformation, reducing the risk of structural overturning.
Smart Images
Figure CN222295362U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of engineering construction, in particular to a vertical non-impact seismic isolation support. Background Art
[0002] Earthquake is one of the natural disasters that seriously endangers human survival today. Seismic isolation bearings have been widely used in the field of building seismic resistance. However, there are many problems with the use of seismic isolation rubber bearings in high-rise buildings. One of the more prominent problems is that the tensile performance of seismic isolation rubber bearings is difficult to meet the requirements. This is mainly because high-rise buildings generally have a large height-to-width ratio, and their own overturning moment will also be large, resulting in a large vertical tensile force in the bearings. The seismic isolation rubber bearing is a laminated rubber structure, and the vertical tensile performance of the rubber material is limited. The relevant specifications stipulate that the tensile stress of seismic isolation bearings for standard defense and key defense buildings should not exceed 1MPa, and the tensile stress limit for special defense buildings is 0MPa. At present, the method to solve the problem of insufficient tensile capacity when seismic isolation rubber bearings are used in high-rise buildings with a large height-to-width ratio or located in high-intensity areas is usually to control the tensile deformation of the bearings by setting tensile limit devices, but such devices are usually large in size or affect the horizontal stiffness of the bearings, and only serve as a second line of defense and do not participate in solving the problem of excessive tensile stress in the bearings during the design stage. Summary of the invention
[0003] The purpose of the utility model is to provide a vertical impact-free seismic isolation bearing, which can reduce the pull-out force by releasing a certain amount of vertical displacement bearing, and can resist horizontal shear force. It has a simple structure, smaller bearing dimensions and lower manufacturing cost.
[0004] A vertical impact-free seismic isolation bearing, characterized in that it includes: two piers and a vibration isolation body located between the two piers, the end of the vibration isolation body is provided with a flange, the flange is provided with a countersunk hole, a fastener is provided in the countersunk hole, the countersunk hole is provided with a step at one end of the countersunk hole close to the pier, the pier is provided with an anchor bar, the fastener and the anchor bar are connected through the countersunk hole, and a lift-off gap is provided between the head of the fastener and the step.
[0005] In one of the embodiments, an elastic buffer is provided between the head of the fastener and the step.
[0006] In one of the embodiments, a deformation gap is provided between the elastic buffer body and the side wall of the countersunk hole; or, a deformation gap is provided between the elastic buffer body and the fastener.
[0007] In one of the embodiments, a washer is provided between the head of the fastener and the elastic buffer body.
[0008] In one of the embodiments, the anchor bar is provided with a sleeve, and the sleeve is inserted into the countersunk hole and connected to the fastener.
[0009] In one of the embodiments, the outer wall of the sleeve is provided with a first sliding layer; or / and, the inner wall of the counterbore is provided with a second sliding layer.
[0010] In one embodiment, the first sliding layer is a stainless steel plate; or / and, the second sliding layer is a three-layer composite sliding plate, and the polytetrafluoroethylene sliding plate surface of the three-layer composite sliding plate faces the sleeve.
[0011] In one embodiment, the sleeve and the anchor bar are threadedly connected, and the sleeve is anchored in the pier.
[0012] In one embodiment, the fastener is inserted into the buttress through the counterbore.
[0013] In one embodiment, the elastic buffer body is a rubber body or a spring.
[0014] Compared with the prior art, the advantages of the vertical non-impact seismic isolation bearing of the utility model are:
[0015] 1. When subjected to pull-out force, the fastener maintains the connection between the pier and the support. The lifting gap between the head of the fastener and the step allows the fastener to slide up and down. The upper pier and the upper flange can be separated by a certain distance. The vibration isolation body is not affected by the pull-out force. When the pull-out force disappears, the upper pier automatically falls back. In addition, the anchor bar and the fastener are connected through countersunk holes. Under the constraint of the countersunk holes, a certain horizontal shear force can be resisted, which can ensure that the support does not slip when the support undergoes horizontal shear deformation, and there is no need to set up an additional horizontal limit mechanism. The utility model can reduce the pull-out force of the support by releasing a certain amount of vertical displacement, and can resist horizontal shear force. It has a simple structure, smaller support dimensions, and lower manufacturing costs.
[0016] 2. An elastic buffer is provided between the head of the fastener and the step. When the support is subjected to a pulling force, the elastic buffer is compressed and deformed to play a buffering role, avoiding rigid collision contact. A deformation gap is provided between the elastic buffer and the side wall of the countersunk hole, and between the elastic buffer and the fastener to provide space for the deformation of the elastic buffer. After the elastic buffer is deformed under pressure and fills the deformation gap, it can no longer be compressed and deformed, reaching the designed maximum lift-off gap. At this time, the support body can also provide vertical tensile resistance to reduce the risk of structural overturning.
[0017] 3. The support structure can be a Type I support or a Type II support, and the shapes of the support and the upper and lower flanges can be square, rectangular or circular.
[0018] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 This is a schematic diagram of the main structure of the vertical impact-free vibration isolation support of the embodiment of the utility model;
[0021] Figure 2 yes Figure 1 A partial enlarged schematic diagram of
[0022] Figure 3 It is a structural schematic diagram of a vertical non-impact vibration isolation support subjected to a pulling force in an embodiment of the utility model;
[0023] Figure 4 It is a schematic diagram of the top view of the structure of the vertical impact-free vibration isolation support of the embodiment of the utility model;
[0024] Figure 5 It is a schematic structural diagram of a vertical non-impact vibration isolation support subjected to horizontal shear force in an embodiment of the utility model;
[0025] Figure 6 It is a structural schematic diagram of another implementation mode of the vertical non-impact vibration isolation support of the utility model.
[0026] Among them, 1 is anchor bar, 2 is sleeve, 3 is upper pier, 4 is upper flange, 5 is elastic buffer, 6 is washer, 7 is fastener, 8 is head of fastener, 9 is rubber layer, 10 is stiffening plate, 11 is lower flange, 12 is deformation gap, 13 is installed and positioned plate, 14 is lower pier, 15 is countersunk hole, 16 is step, 17 isolator, 18 is first sliding layer, 19 is second sliding layer. DETAILED DESCRIPTION
[0027] Embodiments of the present invention will now be described with reference to the accompanying drawings.
[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 according to specific circumstances.
[0030] like Figure 1-5 As shown, the vertical impact-free seismic isolation bearing of the utility model comprises: two piers 3, 14 and a vibration isolation body 17 located between the two piers 3, 14. The vibration isolation body 17 is a load-bearing and vibration isolation component of the bearing. In this embodiment, the vibration isolation body 17 comprises a plurality of rubber layers 9 and a plurality of stiffening plates 10 sandwiched between the rubber layers 9. The two piers 3, 14 are located at the upper and lower ends of the vibration isolation body 17. The upper pier 3 is located above the vibration isolation body 17, and the lower pier 14 is located below the vibration isolation body 17.
[0031] Flanges 4 and 11 are provided at both upper and lower ends of the vibration isolator 17 . The upper flange 4 is provided at the upper end of the vibration isolator 17 , and the lower flange 11 is provided at the lower end of the vibration isolator 17 . Figure 1 The figure shows a situation where a countersunk hole 15 and a fastener 7 are provided on the upper flange 4. The upper flange 4 is provided with a countersunk hole 15, and the fastener 7 is provided in the countersunk hole 15. The countersunk hole 15 is provided with a step 16 at one end close to the upper pier 3. The upper pier 3 is provided with an anchor bar 1. The fastener 7 and the anchor bar 1 are connected through the countersunk hole 15, and a lifting gap is provided between the head 8 of the fastener and the step 16.
[0032] like Figure 4 As shown, multiple countersunk holes 15 and fasteners 7 can be provided on the upper flange 4 .
[0033] like Figure 1 , 4As shown, the upper flange 4 is provided with a plurality of countersunk holes 15 and fasteners 7. The corresponding anchor bars 1 are anchored in the upper pier 3. The anchor bars 1 are connected to the fasteners 7 through the countersunk holes 15. The step 16 of the countersunk hole 15 has a small head at one end and a large head at the other end. The head 8 of the fastener is on the large head side of the countersunk hole 15. The head 8 of the fastener is larger than the diameter of the small head of the countersunk hole 15. When subjected to a pull-out force, the fastener 7 cannot pass upward from the step 16, and the connection between the pier and the support is maintained. When the support is subjected to a pull-out force, the lifting gap between the head 8 of the fastener and the step 16 allows the head 8 of the fastener to move. The upper pier 3 and the upper flange 4 can be separated by a certain distance. The vibration isolator 17 is not affected by the pull-out force. When the pull-out force disappears, the upper pier 3 automatically falls back. In addition, the anchor bars 1 and the fasteners 7 are connected through the countersunk hole 15, and can resist a certain horizontal shear force under the constraint of the countersunk hole 15, such as Figure 5 As shown, it can ensure that the support does not slip when the support undergoes horizontal shear deformation, without the need to set up an additional horizontal limit mechanism. The utility model can reduce the pull-out force by releasing a certain amount of vertical displacement, and can resist the horizontal shear force. It has a simple structure, a smaller support size, and a lower manufacturing cost. In this embodiment, Figure 1 As shown, a countersunk hole 15 and a fastener 7 are provided on the upper flange 4 to release the pulling force, a through hole is provided on the lower flange 11, and a common sleeve 20 is provided at the end of the anchor bar. The common sleeve 20 passes through the through hole of the lower flange 11 and is connected with a bolt 21. However, it is not limited to this embodiment, and it can also be as follows Figure 6 As shown, the countersunk holes 15 and the fasteners 7 are provided only on the lower flange 11 , and the countersunk holes 15 and the fasteners 7 may also be provided on both the upper flange 4 and the lower flange 11 .
[0034] An elastic buffer 5 is provided between the head 8 of the fastener and the step 16. The elastic buffer 5 is a rubber body or a spring, including but not limited to highly elastic rubber, a sleeve spring, or a butterfly spring. When the support is subjected to a pulling force, the elastic buffer 5 is compressed and deformed. At this time, the buffer elastomer plays a buffering role, avoiding rigid collision contact between the fastener 7 and the upper flange 4. At this time, the tensile stiffness of the entire support is the series stiffness of the combination of the compression stiffness of all elastic buffers 5 and the tensile stiffness of the vibration isolator 17. If the support is further pulled, the buffer elastomer is further compressed and deformed. After reaching a certain compression displacement, the buffer elastomer can no longer be compressed and no longer compressively deforms. At this time, only the vibration isolator 17 is tensilely deformed, and the tensile stiffness of the entire support is the tensile stiffness of the vibration isolator 17.
[0035] like Figure 2As shown, a deformation gap 12 is provided between the elastic buffer body 5 and the side wall of the counterbore 15, and a deformation gap 12 is provided between the elastic buffer body 5 and the fastener 7. The deformation gap 12 can provide space for the deformation of the elastic buffer body 5, so that when the elastic buffer body 5 is deformed under pressure and fills the deformation gap, the support reaches the designed maximum lifting gap, and the vibration isolation body 17 is further subjected to tension and will bear vertical tension.
[0036] A washer 6 is provided between the head 8 of the fastener and the elastic buffer body 5. The washer 6 can expand the contact surface between the head 8 of the fastener and the elastic buffer body 5, wrap the elastic buffer body 5 between the washer 6 and the step 16 of the countersunk hole 15, and cause the elastic buffer body 5 to deform within a preset gap. In the embodiment, the fastener 7 is a bolt, but it is not limited to this embodiment. The fastener 7 can also be made of other parts or components, as long as it can connect the anchor bar 1 and limit the anchor bar 1. It can be designed that the diameter of the washer 6 is smaller than the large head diameter of the countersunk hole 15, and when subjected to a pulling force, the washer 6 can enter the large head of the countersunk hole 15 upward. It can also be designed that the diameter of the washer 6 is larger than the diameter of the large end of the countersunk hole 15, and the washer 6 cannot enter the large end of the countersunk hole 15 upward. The washer 6 constrains the elastic buffer body 5 to deform in the large end of the countersunk hole 15. When the pressure resistance of the elastic buffer body 5 is exceeded, the washer 6 touches the edge of the countersunk hole 15 and deforms. The pulling force borne by the support can be intuitively judged by observing the appearance of the washer 6.
[0037] The anchor bar 1 is provided with a sleeve 2, which is inserted into the countersunk hole 15 and connected to the fastener 7. The provision of the sleeve 2 makes the sliding fit of the anchor bar 1 relative to the countersunk hole 15 smoother, avoiding poor sliding caused by the mismatch of the sizes of the anchor bar 1 and the countersunk hole 15. The anchor bar 1 herein refers to a part or component that can connect a support to a building such as a bridge, including but not limited to steel bars.
[0038] The outer wall of the sleeve 2 is provided with a first sliding layer 18, and the inner wall of the counterbore 15 is provided with a second sliding layer 19. The friction coefficients of the first sliding layer 18 and the second sliding layer 19 are small, which is conducive to the sleeve 2 sliding up and down in the counterbore 15.
[0039] In this embodiment, the first sliding layer 18 is a stainless steel plate, and the second sliding layer 19 is a three-layer composite slide plate, in which the PTFE slide plate faces the sleeve 2. In this embodiment, the stainless steel plate and the PTFE slide plate slide relative to each other, with low friction coefficient and high strength.
[0040] The sleeve 2 and the anchor bar 1 are threadedly connected, and the sleeve 2 is anchored into the upper pier 3. The threaded connection method is simple and firm, and is also convenient for on-site construction or upgrading and transformation of existing products.
[0041] like Figure 2As shown, the fastener 7 is inserted into the upper buttress 3 through the countersunk hole 15. In this way, the sleeve 2 penetrates the countersunk hole 15 from top to bottom, and the fastener 7 penetrates the upper buttress 3 from bottom to top, increasing the rigidity of the connection between the sleeve 2 and the fastener 7, which is conducive to bearing horizontal shear force.
[0042] The support structure can be a type I support or a type II support, and the support and the upper and lower flanges 11 can be in the shape of a square, a rectangle or a circle.
[0043] The present invention is described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.
Claims
1. A vertical non-impact seismic isolation bearing, characterized in that: include: Two piers and a vibration isolator located between the two piers, wherein a flange is provided at the end of the vibration isolator, a countersunk hole is provided on the flange, a fastener is provided in the countersunk hole, a step is provided at one end of the countersunk hole close to the pier, the pier is provided with anchor bars, the fastener and the anchor bars are connected through the countersunk hole, and a lifting gap is provided between the head of the fastener and the step.
2. A vertical non-impact seismic isolation bearing according to claim 1, characterized in that: An elastic buffer body is arranged between the head of the fastener and the step.
3. A vertical non-impact seismic isolation bearing according to claim 2, characterized in that: A deformation gap is provided between the elastic buffer body and the side wall of the countersunk hole; or a deformation gap is provided between the elastic buffer body and the fastener.
4. A vertical non-impact seismic isolation bearing according to claim 2, characterized in that: A washer is provided between the head of the fastener and the elastic buffer body.
5. The vertical non-impact seismic isolation bearing according to claim 1, characterized in that: The anchor bar is provided with a sleeve, and the sleeve is inserted into the countersunk hole and connected with the fastener.
6. A vertical non-impact seismic isolation bearing according to claim 5, characterized in that: The outer wall of the sleeve is provided with a first sliding layer; or / and, the inner wall of the counterbore is provided with a second sliding layer.
7. A vertical non-impact seismic isolation bearing according to claim 6, characterized in that: The first sliding layer is a stainless steel plate; or / and, the second sliding layer is a three-layer composite sliding plate, and the polytetrafluoroethylene sliding plate surface of the three-layer composite sliding plate faces the sleeve.
8. The vertical non-impact seismic isolation bearing according to claim 5, characterized in that: The sleeve is threadedly connected to the anchor bar, and the sleeve is anchored into the pier.
9. A vertical non-impact seismic isolation bearing according to any one of claims 1 to 8, characterized in that: The fastener is inserted into the buttress through the counterbore.
10. A vertical non-impact seismic isolation bearing according to any one of claims 2 to 4, characterized in that: The elastic buffer body is a rubber body or a spring.