Multi-stage friction damping support
By designing a multi-stage friction shock absorbing support, the friction effect and limit structure of high and low friction coefficient areas are used to solve the problems of falling beams and damage of bridge support during excessive displacement and earthquake impact, and effective shock absorption and limiting bit effect.
Patent Information
- Application Number
- CN202421243831.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-06-03
AI Technical Summary
When the relative displacement between the piers and bridges is too large, the existing bridge support can easily lead to falling beams, and lack shock absorption measures, which cannot effectively release seismic force, resulting in damage to the bridge collision.
Design a multi-stage friction shock absorbing support, by setting a second friction region with a high friction coefficient and a first friction region with a low friction coefficient, using sliding friction between the intermediate cover plate and the intermediate connecting plate, and the upper support plate Sliding friction with the intermediate cover plate slows down the impact of earthquakes on the bridge. At the same time, by setting a cover plate limit structure and a support limit structure, the sliding range of the intermediate cover plate and the upper support plate is limited to prevent the beam from falling off.
Effectively slow down the impact of earthquakes on bridges, prevent collision damage between falling beams and bridges, and improve the operational safety and seismic resistance of bridges.
Smart Images
Figure CN222477208U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of bridge construction, and in particular relates to a multi-stage friction damping support. Background Art
[0002] Both pot-type rubber bearings and ball-type bearings are widely used in the market due to their large load-bearing capacity and flexible rotation. Their function is to transfer loads and adapt to displacement angles. However, in the actual operation of the bridge, the relative displacement between the pier and the bridge is too large, and the beam slides out of the displacement range set by the bearing, resulting in beam falling. In addition, the existing bearings have no shock-absorbing measures. When an earthquake occurs, the force cannot be released, resulting in a full-force rigid collision, causing damage to the bridge.
[0003] Bridge bearings are key components of the entire bridge. The safety performance of the bearings and their adaptability to force majeure are directly related to the operational safety of the bridge. Therefore, higher requirements are placed on the bridge's displacement limit and seismic isolation technology. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides a multi-stage friction shock-absorbing bearing, which achieves a shock-absorbing effect by setting a second friction area with a high friction coefficient and a first friction area with a low friction coefficient, and utilizes the cooperation of the two friction areas, and prevents the beam from being displaced too much and causing the beam to fall by setting a cover plate limiting structure and a support limiting structure.
[0005] The utility model is achieved in this way:
[0006] A multi-stage friction shock-absorbing support, including a bottom basin, an intermediate connecting plate installed on the bottom basin, an intermediate cover plate slidably arranged above the intermediate connecting plate, and an upper support plate slidably arranged above the intermediate cover plate; a first friction area is arranged between the intermediate connecting plate and the intermediate cover plate, a second friction area is arranged between the intermediate cover plate and the upper support plate, and the friction coefficient of the second friction area is greater than the friction coefficient of the first friction area; a cover plate limiting structure is arranged at least at one end of the intermediate cover plate, and when the intermediate cover plate and the intermediate connecting plate slide relative to each other, the cover plate limiting structure can abut against the intermediate connecting plate; a support limiting structure is arranged at least at one end of the upper support plate, and when the upper support plate and the intermediate cover plate slide relative to each other, the support limiting structure can abut against the intermediate cover plate.
[0007] In the above technical scheme, the middle cover plate can slide on the middle connecting plate, and the cover plate limiting structure is used to limit the sliding range of the middle cover plate to prevent the middle cover plate from sliding too far and sliding off the middle connecting plate. The upper support plate can slide on the middle cover plate, and the support limiting structure is used to limit the sliding range of the upper support plate to prevent the upper support plate from sliding too far and sliding off the middle cover plate. Since the friction coefficient of the first friction area is smaller than the friction coefficient of the second friction area, in daily use, the temperature change displacement requirements of the bridge are met by sliding the middle cover plate on the middle connecting plate. When an earthquake occurs, the temperature change displacement is exceeded, and the cover plate limiting structure of the middle cover plate abuts against the middle connecting plate. The middle connecting plate limits the further movement of the middle cover plate. The upper support plate overcomes the friction and starts to slide on the middle cover plate, starting the second friction area. The impact of the earthquake on the bridge is mitigated by friction energy consumption. The cover plate limiting structure and the support limiting structure can limit the sliding displacement of the middle cover plate and the upper support plate to prevent the beam from falling.
[0008] Furthermore, a flat wear-resistant slide plate is installed on the surface of the middle connecting plate close to the middle cover plate; a mirror stainless steel slide plate is installed on the surface of the middle cover plate close to the middle connecting plate; a first friction area is formed between the flat wear-resistant slide plate and the mirror stainless steel slide plate.
[0009] Furthermore, a fine-rolled stainless steel plate is installed on the surface of the upper support plate close to the middle cover plate, and a mirror copper plate is installed on the surface of the middle cover plate close to the upper support plate, and a second friction area is formed between the fine-rolled stainless steel plate and the mirror copper plate.
[0010] Furthermore, a sintered coating is provided on the surface of the middle cover plate close to the upper support plate, and a second friction area is formed between the sintered coating and the upper support plate.
[0011] Furthermore, at least one end of the upper support plate is connected to a stop bar through a connecting piece, and the other end of the stop bar is in contact with the side wall of the bottom basin. The stop bar is used to limit the relative movement between the upper support plate and the bottom basin. When the horizontal force reaches a certain level, the connecting piece between the stop bar and the upper support plate will be sheared off, and the stop bar will fall down, releasing the relative movement space between the upper support plate and the bottom basin. The upper support plate drives the middle cover plate to slide on the middle connecting plate through friction until the middle connecting plate abuts against the cover plate limiting structure. The middle connecting plate will limit the further movement of the middle cover plate, and the upper support plate will continue to move despite the friction until the cover plate limiting structure abuts against the middle cover plate. When an earthquake occurs, the stop bar will be sheared off, which can consume part of the seismic force, avoid the earthquake response excellence period, and reduce the seismic force response of the upper structure, thereby achieving the purpose of vibration reduction.
[0012] Furthermore, the connecting member is a pin and / or a bolt.
[0013] Furthermore, the middle connecting plate is a spherical crown lining, a mounting groove is provided on the surface of the bottom basin, the bottom surface of the mounting groove is a spherical structure, and the spherical crown lining is located in the mounting groove; the surface of the spherical crown lining close to the bottom basin is a spherical crown, and a spherical wear-resistant slide plate is installed on the surface of the spherical crown facing the bottom basin.
[0014] Furthermore, a retaining ring is fixed on the surface of the bottom basin, and the retaining ring is laid along the edge of the installation groove. There is a sliding gap between the retaining ring and the spherical crown liner, and the retaining ring is used to prevent the spherical crown liner from sliding out of the installation groove; the spherical crown structure of the spherical crown liner can cooperate with the spherical structure at the bottom of the installation groove and rotate in the installation groove. The sliding gap between the spherical crown liner and the retaining ring enables the spherical crown liner to have a rotation range. The structure of the retaining ring can prevent the spherical crown liner from rotating too much and sliding out of the installation groove, causing the upper bearing plate to tilt too much and collide with the bridge pier.
[0015] Furthermore, the middle connecting plate is an middle steel plate, a mounting groove is provided on the surface of the bottom basin, the middle steel plate is located in the mounting groove, and a rubber plate is provided between the middle steel plate and the bottom surface of the mounting groove, and the support can be a spherical support or a basin-type support.
[0016] Furthermore, a first buffer layer is provided on a side of at least one cover plate limiting structure close to the middle connecting plate, and a second buffer layer is provided on a side of at least one support limiting structure close to the middle cover plate.
[0017] The beneficial effects of the utility model are:
[0018] 1. In the utility model, by setting a second friction area with a high friction coefficient and a first friction area with a low friction coefficient, the sliding friction between the middle cover plate and the middle connecting plate, and the sliding friction between the upper support plate and the middle cover plate are utilized to mitigate the impact of earthquakes on the bridge.
[0019] 2. In the utility model, a cover plate limiting structure is provided on the middle cover plate to limit the sliding range of the middle cover plate on the middle connecting plate, and a support limiting structure is provided on the upper support plate to limit the sliding range of the upper support plate on the middle cover plate, thereby preventing the middle cover plate and the upper support plate from sliding too far and causing the beam to fall.
[0020] 3. In the utility model, by setting a retaining bar between the upper support plate and the bottom basin, when an earthquake occurs, the retaining bar is sheared off under the action of excessive horizontal force, thereby consuming a part of the seismic force, avoiding the period of outstanding seismic response, reducing the seismic force response of the upper structure, and achieving the purpose of vibration reduction.
[0021] 4. In the utility model, the middle connecting plate is set as the spherical crown lining plate, and the spherical crown lining plate rotates in the installation groove to dissipate the seismic force through rotational friction. At the same time, a retaining ring is set on the bottom basin to limit the rotation range of the spherical crown lining plate, thereby preventing the spherical crown lining plate from sliding out of the installation groove area, thereby avoiding the situation where the rotation angle of the spherical crown lining plate is too large, resulting in the upper support plate being tilted too much and colliding with the bridge pier. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model 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.
[0023] Figure 1 It is a cross-sectional view of the existing spherical bearing when the displacement is too large;
[0024] Figure 2 This is a cross-sectional view of the existing pot-type support when the displacement is too large;
[0025] Figure 3 It is a cross-sectional view of the existing spherical bearing when the rotation angle is too large;
[0026] Figure 4 It is a cross-sectional view of a spherical shock-absorbing support provided by an embodiment of the utility model;
[0027] Figure 5 It is a detailed view of location A provided in an embodiment of the utility model;
[0028] Figure 6 It is a cross-sectional view of the spherical crown lining plate and the bottom basin provided by the embodiment of the utility model;
[0029] Figure 7 It is a schematic diagram of a one-way spherical shock-absorbing bearing provided in an embodiment of the utility model;
[0030] Figure 8 It is a schematic diagram of a fixed spherical shock-absorbing bearing provided in an embodiment of the utility model;
[0031] Fig. 9 It is a schematic diagram of a bidirectional spherical shock-absorbing bearing provided by an embodiment of the utility model;
[0032] Fig.10 It is a detailed schematic diagram of a bidirectional spherical shock-absorbing bearing provided in an embodiment of the utility model;
[0033] Fig.11 It is a schematic diagram of the shock absorbing process of the spherical shock absorbing support provided in the embodiment of the utility model;
[0034] Fig.12 It is a cross-sectional view of a pot-type shock-absorbing support provided by an embodiment of the utility model;
[0035] Fig.13 It is a schematic diagram of a one-way pot-type shock-absorbing support provided by an embodiment of the utility model;
[0036] Fig.14 It is a schematic diagram of a fixed pot-type shock-absorbing support provided by an embodiment of the utility model;
[0037] Fig.15 It is a schematic diagram of a bidirectional pot-type shock-absorbing support provided by an embodiment of the utility model;
[0038] Fig.16 It is a schematic diagram of the shock absorbing process of the pot-type shock absorbing support provided in the embodiment of the utility model.
[0039] Description of reference numerals:
[0040] 100-bottom basin, 110-installation groove, 120-retaining ring, 200-ball crown lining, 300-middle cover plate, 310-cover plate limiting structure, 400-upper support plate, 410-support limiting structure, 510-spherical wear-resistant skateboard, 600-first friction area, 610-flat wear-resistant skateboard, 620-mirror stainless steel skateboard, 700-second friction area, 710-finely rolled stainless steel plate, 720-mirror copper plate, 800-speed bar, 810-pin shaft, 820-bolt, 910-first buffer layer, 920-second buffer layer, 101-middle steel plate, 102-rubber plate. DETAILED DESCRIPTION
[0041] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.
[0042] Example
[0043] As the key component of the entire bridge, the bridge bearing's safety performance and adaptability to force majeure are directly related to the operational safety of the bridge. Therefore, higher requirements are placed on the bridge bearing's angular limit, displacement limit, and seismic isolation technology. Figure 1 This is a schematic diagram of the existing spherical bearing structure. Figure 2 is a schematic diagram of an existing basin-type support structure. In both support structures, there is no restriction on the sliding range of the upper support plate 400. Under the action of force majeure, such as an earthquake, the upper support plate 400 is prone to slide too much, resulting in an unstable center of gravity of the bridge as a whole, resulting in a beam fall. Figure 3As shown, the bearing structure also has no way to achieve the effect of seismic reduction and isolation. When an earthquake occurs, the force cannot be released, resulting in a full-force rigid collision, causing collision damage to the bridge.
[0044] In view of the above problems, this embodiment provides a multi-stage friction damping support, combined with Figures 4 to 16 As shown, the shock-absorbing support includes a base basin 100, on which an intermediate connecting plate is installed, above which an intermediate cover plate 300 is slidably arranged, and above which an upper support plate 400 is slidably arranged; a first friction area 600 is provided between the intermediate connecting plate and the intermediate cover plate 300, and a second friction area 700 is provided between the intermediate cover plate 300 and the upper support plate 400, and the friction coefficient of the second friction area 700 is greater than the friction coefficient of the first friction area 600; at least one end of the intermediate cover plate 300 is provided with a cover plate limiting structure 310, and when the intermediate cover plate 300 and the intermediate connecting plate slide relative to each other, the cover plate limiting structure 310 can abut against the intermediate connecting plate; at least one end of the upper support plate 400 is provided with a support limiting structure 410, and when the upper support plate 400 and the intermediate cover plate 300 slide relative to each other, the support limiting structure 410 can abut against the intermediate cover plate 300.
[0045] In actual implementation, in order to improve the use effect of the shock-absorbing bearing, a cover plate limiting structure 310 is usually provided at the four ends of the middle cover plate 300. The cover plate limiting structure 310 forms a ring structure. No matter in which direction the middle cover plate 300 slides, the cover plate limiting structure 310 can abut against the middle connecting plate to limit the sliding range of the middle cover plate 300. The same is true for the support limiting structure 410 of the upper support plate 400, which limits the sliding range of the upper support plate 400 in all directions to prevent the middle cover plate 300 and the upper support plate 400 from sliding too much and causing the beam to fall.
[0046] In the daily operation of the bridge, since the friction coefficient of the first friction area 600 is smaller than that of the second friction area 700, the bearing meets the temperature change displacement requirement of the bridge through the first friction area 600. Under the action of an earthquake, if the temperature change displacement is exceeded, the second friction area 700 is activated to mitigate the impact of the earthquake on the bridge through friction energy consumption. Specifically, first, the middle cover plate 300 slides on the middle connecting plate. After the cover plate limiting structure 310 of the middle cover plate 300 abuts against the middle connecting plate, the middle connecting plate limits the further movement of the middle cover plate 300. Then, the upper bearing plate 400 overcomes the friction and begins to slide on the middle cover plate 300, thereby activating the second friction area 700 to mitigate the impact of the earthquake on the bridge through friction energy consumption.
[0047] A flat wear-resistant skateboard 610 is installed on the surface of the middle connecting plate close to the middle cover plate 300; a mirror stainless steel skateboard 620 is welded on the surface of the middle cover plate 300 close to the middle connecting plate; a first friction area 600 is formed between the flat wear-resistant skateboard 610 and the mirror stainless steel skateboard 620. In order to reduce the friction between the flat wear-resistant skateboard 610 and the mirror stainless steel skateboard 620, a first silicone grease layer can be provided on the flat wear-resistant skateboard 610. The first silicone grease layer is formed by directly applying silicone grease on the surface of the flat wear-resistant skateboard 610. The first silicone grease layer provides lubrication to reduce the friction between the flat wear-resistant skateboard 610 and the mirror stainless steel skateboard 620.
[0048] A fine-rolled stainless steel plate 710 is welded on the surface of the upper support plate 400 close to the middle cover plate 300, and a mirror copper plate 720 is welded on the surface of the middle cover plate 300 close to the upper support plate 400, and a second friction area 700 is formed between the fine-rolled stainless steel plate 710 and the mirror copper plate 720; in addition to the fine-rolled stainless steel plate 710 and the mirror copper plate 720, a sintered coating can also be provided on the surface of the middle cover plate 300 close to the upper support plate 400, and a second friction area 700 can also be formed between the sintered coating and the upper support plate 400.
[0049] At least one end of the upper support plate 400 is connected to a stop bar 800 via a connector, and the other end of the stop bar 800 contacts the side wall of the bottom basin 100. Depending on the number and position of the stop bars 800 connected to the upper support plate 400, the support can be divided into fixed type, unidirectional type and bidirectional type.
[0050] During daily operation of the bridge, the stop bar 800 is used to limit the relative movement between the upper bearing plate 400 and the bottom basin 100, and only the first friction area 600 meets the temperature change displacement requirements of the bridge. When an earthquake occurs, when the horizontal force reaches a certain level, the connection between the fixed or one-way stop bar 800 and the upper bearing plate 400 will be cut off, and the stop bar 800 will fall, releasing the relative movement space between the upper bearing plate 400 and the bottom basin 100, and the upper bearing plate 400 can slide in the direction of the above-mentioned horizontal force. 00 The middle cover plate 300 is driven to slide on the middle connecting plate through friction until the middle connecting plate abuts against the cover plate limiting structure 310. The middle connecting plate will limit the further movement of the middle cover plate 300, and the upper support plate 400 will overcome the friction and continue to move until the support limiting structure 410 abuts against the middle cover plate 300. In addition, when an earthquake occurs, the retaining bar 800 is sheared off, which can consume part of the seismic force, avoid the earthquake response excellence period, and reduce the seismic force response of the upper structure, thereby achieving the purpose of vibration reduction.
[0051] In this embodiment, the connecting parts between the upper support plate 400 and the stop bar 800 are generally connected by a pin 810 and a bolt 820. The stop bar 800 usually has a right-angle structure to maintain a neat appearance. At the same time, it is convenient to connect with the upper support plate 400 and also convenient to contact with the bottom basin 100.
[0052] The support provided in this embodiment can be a spherical support or a pot-type support. When it is a spherical support, combined with Figures 4 to 11 As shown, the middle connecting plate is a spherical crown lining plate 200, and the spherical crown lining plate 200 has an upper and lower round structure. The surface of the spherical crown lining plate 200 close to the bottom basin 100 is a spherical crown. The surface of the bottom basin 100 is provided with a mounting groove 110, and the bottom surface of the mounting groove 110 is a spherical structure. The spherical crown lining plate 200 is located in the mounting groove 110, and a spherical wear-resistant slide plate 510 is installed on the surface of the spherical crown facing the mounting groove 110. The spherical crown lining plate 200 can rotate in the mounting groove 110, and a sink groove stop is provided on the surface of the spherical crown, and the spherical wear-resistant slide plate 510 is installed in the sink groove stop; in order to reduce the friction between the spherical wear-resistant slide plate 510 and the ground of the mounting groove 110, a second silicone grease layer can be provided on the surface of the spherical wear-resistant slide plate 510, and the second silicone grease layer is formed by directly applying silicone grease on the surface of the spherical wear-resistant slide plate 510, and the second silicone grease layer fills the depression on the surface of the spherical wear-resistant slide plate 510. Part, which plays a lubricating role and reduces friction; in order to prevent the spherical crown lining 200 from turning too much, a retaining ring 120 is fixed on the surface of the bottom basin 100, and the retaining ring 120 is laid along the edge of the installation groove 110. There is a sliding gap between the retaining ring 120 and the spherical crown lining 200, and the retaining ring 120 is used to prevent the spherical crown lining 200 from sliding out of the installation groove 110. In this embodiment, the retaining ring 120 and the bottom basin 100 are an integrally formed structure; the spherical crown structure of the spherical crown lining 200 can cooperate with the spherical surface structure at the bottom of the installation groove 110 and rotate in the installation groove 110. The sliding gap between the spherical crown lining 200 and the retaining ring 120 makes the spherical crown lining 200 have a rotation range, and the structure of the retaining ring 120 can prevent the spherical crown lining 200 from turning too much and sliding out of the installation groove 110, causing the upper support plate 400 to tilt too much and collide with the bridge pier. Figure 3 This is a schematic diagram showing that in an existing spherical bearing structure, the spherical cap lining plate 200 rotates too much, causing the upper bearing plate 400 to collide with the bridge pier.
[0053] When the intermediate connecting plate is a spherical cap liner 200, the spherical support can be divided into Figure 8 The fixed type shown, Figure 7 The one-way type shown, and Fig. 9 Bidirectional type shown.
[0054] The fixed type means that the four ends of the upper support plate 400 are connected with the guard bars 800, and the upper support plate 400 cannot move along its width and length directions. In addition, the fixed type support mainly plays a restraining role. The gap between the cover limiting structure 310 of the middle cover plate 300 and the spherical crown lining plate 200 is relatively small, generally only about 3 mm in implementation, to ensure the assembly effect and the middle cover plate 300 can have a small sliding range on the spherical crown lining plate 200. The fixed type support limiting structure 410 is provided with a second buffer layer 920 on the side close to the middle cover plate 300. When an earthquake occurs, after the guard bar 800 falls off, the second buffer layer 920 plays a buffering role when the support limiting structure 410 collides with the middle cover. The second buffer layer 920 is generally made of elastic buffer pads, which are generally made of rubber.
[0055] The one-way type means that a group of opposite sides of the upper support plate 400 are connected with the guard bars 800, and the upper support plate 400 can only move along its width direction or length direction. This group of opposite sides of the middle cover plate 300 is similar to the fixed type. The gap between the cover plate limiting structure 310 and the spherical crown lining 200 is small. The first buffer layer 910 is generally not provided on the side of the cover plate limiting structure 310 close to the spherical crown lining 200, and the other group of opposite sides of the upper support plate 400 are not connected with the guard bars 800. The gap between the cover plate limiting structure 310 and the spherical crown lining 200 on this group of opposite sides is large, and the movable displacement of the cover plate limiting structure 310 is large. The first buffer layer 910 is provided on the side close to the spherical crown lining 200, and the first buffer layer 910 is also made of an elastic buffer pad; the one-way type support limiting structure 410 is provided with a second buffer layer 920 on the side close to the middle cover plate 300.
[0056] The bidirectional type means that there is no block bar 800 connected to either end of the upper support plate 400, the upper support plate 400 can move freely, and there are larger gaps between the cover plate limiting structure 310 and the spherical crown lining 200 in four directions on the middle cover plate 300. A first buffer layer 910 is provided on the side of the cover plate limiting structure 310 close to the spherical crown lining 200, and a second buffer layer 920 is provided on the side of the support limiting structure 410 close to the middle cover plate 300.
[0057] When an earthquake occurs, the shock absorbing process of the spherical shock absorbing support provided in this embodiment is as follows: Fig.11As shown, under the action of earthquake force, the retaining bar 800 of the fixed or one-way bearing constraint direction is sheared off, which consumes part of the earthquake force, avoids the earthquake response excellence period, and reduces the earthquake force response of the upper structure, thereby achieving the purpose of shock reduction; after the retaining bar 800 is sheared off, the movement space of the bottom basin 100 and the upper support plate 400 is released. At this time, since the retaining bar 800 is sheared off, the one-way bearing and the fixed bearing are both transformed into two-way bearings with limited displacement and cooperate in earthquake resistance. The upper support plate 400 drives the middle cover plate 300 to slide through friction. When the cover plate limiting structure 310 abuts against the ball crown lining plate 200, the upper support plate 4 00 overcomes the friction and slides on the middle cover plate 300, and the bearing dissipates the seismic force by sliding in the plane of the second friction area 700 until the bearing limiting structure 410 abuts against the edge of the middle cover plate 300, and the upper bearing plate 400 is limited and cannot slide further, thereby preventing the beam from falling; under the continuous action of the seismic force, the bottom basin 100 changes from sliding to rotating relative to the upper bearing plate 400 and the middle spherical crown lining plate 200, and rotates within a limited rotation angle to dissipate the seismic force by friction. At the same time, the retaining ring 120 structure prevents the spherical crown lining plate 200 from rotating too much, thereby preventing the beam from falling or the upper bearing plate 400 from colliding with the bridge pier.
[0058] When the support is a pot-type support, the middle connecting plate is the middle steel plate 101, combined with Figure 12 to Figure 16 As shown, the bottom basin 100 is provided with a mounting groove 110 on its surface, the middle steel plate 101 is located in the mounting groove 110, and a rubber plate 102 is provided between the middle steel plate 101 and the bottom surface of the mounting groove 110. The vibration reduction principle of the basin-type bearing when an earthquake occurs is similar to that of the spherical bearing, except that the middle steel plate 101 cannot rotate in the mounting groove 110. The vibration reduction process of the basin-type shock-absorbing bearing provided in this embodiment is as follows: Fig.16 shown.
[0059] In other embodiments, in addition to the spherical support and the pot-type support, supports of other structures may also be selected. It is only necessary to maintain the second friction area 700 structure with a high friction coefficient, the first friction area 600 structure with a low friction coefficient, the cover plate limiting structure 310 and the support limiting structure 410 to achieve a vibration reduction effect and prevent the beam from falling.
[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A multi-stage friction damping support, characterized in that: It comprises a bottom basin (100), a middle connecting plate is installed on the bottom basin (100), a middle cover plate (300) is slidably arranged above the middle connecting plate, and an upper support plate (400) is slidably arranged above the middle cover plate (300); A first friction region (600) is provided between the intermediate connecting plate and the intermediate cover plate (300), and a second friction region (700) is provided between the intermediate cover plate (300) and the upper support plate (400), wherein the friction coefficient of the second friction region (700) is greater than the friction coefficient of the first friction region (600); At least one end of the middle cover plate (300) is provided with a cover plate limiting structure (310), and when the middle cover plate (300) and the middle connecting plate slide relatively, the cover plate limiting structure (310) can abut against the middle connecting plate; At least one end of the upper support plate (400) is provided with a support limiting structure (410), and when the upper support plate (400) and the middle cover plate (300) slide relatively, the support limiting structure (410) can abut against the middle cover plate (300).
2. A multi-stage friction damping support according to claim 1, characterized in that: A flat wear-resistant sliding plate (610) is installed on the surface of the middle connecting plate close to the middle cover plate (300); A mirror-finished stainless steel sliding plate (620) is installed on the surface of the middle cover plate (300) close to the middle connecting plate; A first friction area (600) is formed between the flat wear-resistant slide plate (610) and the mirror-finished stainless steel slide plate (620).
3. The multi-stage friction damping support according to claim 1, characterized in that: A precision-rolled stainless steel plate (710) is installed on the surface of the upper support plate (400) close to the middle cover plate (300). A mirror copper plate (720) is installed on the surface of the middle cover plate (300) close to the upper support plate (400). A second friction area (700) is formed between the precision-rolled stainless steel plate (710) and the mirror copper plate (720).
4. The multi-stage friction damping support according to claim 1, characterized in that: A sintered coating is provided on the surface of the middle cover plate (300) close to the upper support plate (400), and a second friction area (700) is formed between the sintered coating and the upper support plate (400).
5. The multi-stage friction damping support according to claim 1, characterized in that: At least one end of the upper support plate (400) is connected to a stop bar (800) via a connecting piece, and the other end of the stop bar (800) is in contact with the side wall of the bottom basin (100).
6. The multi-stage friction damping support according to claim 5, characterized in that: The connecting member is a pin (810) and / or a bolt (820).
7. The multi-stage friction damping support according to claim 1, characterized in that: The intermediate connecting plate is a spherical cap lining (200), the surface of the bottom basin (100) is provided with a mounting groove (110), the bottom surface of the mounting groove (110) is a spherical structure, the spherical cap lining (200) is located in the mounting groove (110), the surface of the spherical cap lining (200) close to the bottom basin (100) is a spherical cap, and a spherical wear-resistant sliding plate (510) is installed on the surface of the spherical cap facing the bottom basin (100).
8. The multi-stage friction damping bearing according to claim 7, characterized in that: A retaining ring (120) is fixed on the surface of the bottom basin (100), and the retaining ring (120) is laid along the edge of the installation groove (110). There is a sliding gap between the retaining ring (120) and the spherical crown lining plate (200), and the retaining ring (120) is used to prevent the spherical crown lining plate (200) from sliding out of the installation groove (110).
9. The multi-stage friction damping bearing according to claim 1, characterized in that: The middle connecting plate is a middle steel plate (101), a mounting groove (110) is provided on the surface of the bottom basin (100), the middle steel plate (101) is located in the mounting groove (110), and a rubber plate (102) is provided between the middle steel plate (101) and the bottom surface of the mounting groove (110).
10. The multi-stage friction damping support according to claim 1, characterized in that: A first buffer layer (910) is provided on a side of at least one of the cover plate limiting structures (310) close to the middle connecting plate. A second buffer layer (920) is provided on a side of at least one of the support limiting structures (410) close to the middle connecting plate.