Elastomer support easy to maintain

Abstract

An elastomer support easy to maintain comprises anchoring assemblies and an elastic supporting tool, an upper anchoring assembly and a lower anchoring assembly are arranged at the upper end and the lower end of the elastic supporting tool respectively, a supporting steel plate is arranged in the elastic supporting tool, and the upper anchoring assembly is fixedly connected to the supporting steel plate. A buffer ring is arranged between the lower anchoring assembly and the elastic supporting tool. The elastic supporting tool further comprises a rubber body, a partition plate and pressure-bearing steel plates, the partition plate and the pressure-bearing steel plates are vulcanized in the rubber body, the pressure-bearing steel plates are arranged above and below the partition plate, and the space between the partition plate and the pressure-bearing steel plates is filled with the rubber body. Under the condition of ultimate displacement, the horizontal bearing capacity of the support can be enhanced, beam falling can be prevented, the safety of a bridge structure is guaranteed, and under the action of an earthquake, large horizontal deformation capacity can be provided and reliable horizontal limiting can be guaranteed. The height adjusting base plates are arranged, and the height of the support can be flexibly and conveniently adjusted by filling or removing the base plates of different numbers and thickness specifications over or under the elastic body.

Description

Technical Field

[0001] This utility model relates to the field of seismic isolation technology in bridge and building engineering, specifically to an easy-to-maintain elastic bearing for bridge seismic isolation. Background Technology

[0002] In recent years, the use of elastic bearings in bridge structures has become an important seismic resistance measure, attracting increasing attention. Various types of seismic isolation bearings have emerged, especially rubber-based ones. Commonly used rubber bearings generally include plate bearings and seismic isolation rubber bearings (natural rubber isolation bearings (LNR), lead-core rubber bearings (LRB), and high-damping rubber bearings (HDR), etc.). Seismic isolation rubber bearings are generally used in sites with high seismic fortification intensity, are relatively expensive, and are not easy to disassemble and replace, and do not have height adjustment capabilities. Plate rubber bearings, under normal use, rely on the friction between the bearing and the upper and lower structures to withstand horizontal forces. Due to the very limited designed shear displacement, the bearings are unrestrained in the horizontal direction during earthquakes, and the beam is prone to lateral drift at the bearing location, causing bearing detachment, rollover, shear failure, and even beam collapse.

[0003] A search within China revealed the following patents to be similar to this utility model:

[0004] Similar patent 1: Invention patent CN116905341A proposes a bridge bearing limiting structure and its limiting method, belonging to the field of bridge seismic resistance. The bridge bearing limiting structure consists of a bearing pad, a detachable stop device, a buffer layer, and the bearing. The bearing pad has continuous bosses on three sides and a detachable stop device on one side, facilitating bearing replacement and height adjustment. Simultaneously, the bosses and the detachable stop device form a closed space, effectively limiting the horizontal displacement of the bridge bearing under earthquakes, preventing large deviations in the bridge bearing, and thus protecting the safety of the superstructure. This bridge bearing limiting structure has strong load-bearing capacity, is easy to construct, can be designed according to different seismic fortification needs, has a simple structure, and is cost-effective.

[0005] Similar Patent 2: Utility Model CN209891050U relates to an adjustable height seismic isolation bearing, including a bearing body, a raising component, and a limiting component. The bearing body is supported between a base and a beam. The raising component abuts against the beam, and / or the raising component abuts against the base. The limiting component abuts against both the raising component and the bearing body, limiting the raising component to a position corresponding to the bearing body. By using the raising component to adjust the overall height while using the limiting component to limit the raising component to the position corresponding to the bearing body, the overall ability to withstand horizontal forces is increased, improving reliability.

[0006] Existing fencing structures are designed with unilateral limiting. When the horizontal bearing capacity of the support is large, the limiting structure is prone to damage. To improve the bearing capacity, the fencing structure needs to be strengthened by increasing the number of anchor rods or the size of the baffles, which increases costs and enlarges the plane size of the pad stone. This utility model proposes an integral ring-shaped fencing, which improves the horizontal bearing capacity. The ring baffle and the elastic body are produced by thickening the steel plate inside, which reduces production costs and solves the above problems. Utility Model Content

[0007] The technical problem to be solved by this utility model is: how to improve the horizontal resistance and load-bearing capacity while satisfying the vertical compressive strength and shock absorption capacity, and improve the reliability of the elastic support.

[0008] To address the aforementioned problems, the technical solution proposed by this utility model is: an easy-to-maintain elastic support, comprising an anchoring component and an elastic support fixture. An upper anchoring component and a lower anchoring component are respectively provided at the upper and lower ends of the elastic support fixture. A support steel plate is provided in the elastic support fixture. The upper anchoring component is fixedly connected to the support steel plate. A buffer ring is provided between the lower anchoring component and the elastic support fixture.

[0009] Preferably, the elastic support fixture also includes a rubber body, a partition, and a pressure-bearing steel plate. The partition and the pressure-bearing steel plate are vulcanized in the rubber body. Pressure-bearing steel plates are provided above and below the partition, and the space between the partition and the pressure-bearing steel plate is filled with rubber body.

[0010] Preferably, the partition and the pressure-bearing steel plate are embedded in the rubber body in layers, the partition and the pressure-bearing steel plate are arranged in parallel, the partitions are also arranged in parallel with each other, and the space between the partitions is also filled with rubber body.

[0011] Preferably, both the upper and lower anchoring components include an anchor steel rod, a fastening bolt, and a baffle. The baffle has a central hole that passes through it, and an installation hole that passes through it on its outer side. The anchor steel rod has a threaded hole that passes through it, and one end of the fastening bolt passes through the installation hole of the baffle and is tightened into the threaded hole of the anchor steel rod.

[0012] Preferably, the upper anchoring component is fixedly connected to the support steel plate, which means that the support steel plate has a through-hole, and the through-hole on the support steel plate matches the through-hole on the outer side of the baffle. The support steel plate is placed on the baffle, and one end of the fastening bolt passes through the through-hole of the baffle and the support steel plate from below and is tightened in the threaded hole of the anchor steel rod.

[0013] Preferably, a pad is provided below the elastic support fixture, and the pad is a chamfered cuboid.

[0014] Preferably, the upper end of the elastic support fixture is embedded in the central hole of the upper anchoring component, and the lower end of the elastic support fixture, the pad, and the buffer ring are all embedded in the central hole of the baffle of the lower anchoring component.

[0015] Preferably, the buffer ring is annular, with the inner side of the buffer ring pressing against the rubber body at the lower end of the elastic support fixture, and the outer side of the buffer ring pressing against the inner side of the baffle of the lower anchoring component.

[0016] The beneficial technical effects of this utility model are:

[0017] 1) This utility model detachably connects the lower annular baffle to the lower structure and the upper annular baffle to the upper structure. Under normal displacement, the support relies solely on the friction pair between the upper and lower surfaces of the elastic body for horizontal constraint. Under extreme displacement, the annular baffle and the friction pair work together to enhance the horizontal bearing capacity of the support, prevent beam collapse, ensure the safety of the bridge structure, provide greater horizontal deformation capacity under seismic action, and ensure reliable horizontal limiting.

[0018] 2) This utility model uses a bolted connection method, which ensures convenient and quick replacement and disassembly. After slightly lifting the upper structure, the 8 fastening bolts can be removed to move the elastic body and the annular baffle, which is convenient and reliable. Adjustable shims are provided; by filling or removing shims of different numbers and thicknesses directly above or below the elastic body, the support height can be flexibly and conveniently adjusted.

[0019] 3) The shape of the elastomer used in this utility model is a cylindrical or square shape with a uniform cross section. Compared with conventional seismic isolation rubber bearings, the processing and molding cost of the elastomer is lower. The annular baffle and the thickened steel plate inside the elastomer are designed with equal thickness, which can realize the efficient use of steel and make the product more economical. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the overall structure of Embodiment 1;

[0021] Figure 2 The diagram shows the overall structure installed between the upper component and the pad stone.

[0022] Figure 3 This is a partial sectional view of the three-dimensional structure of Embodiment 1;

[0023] Figure 4 This is a three-dimensional structural diagram of the lower anchoring component in Embodiment 1;

[0024] Figure 5 This is a three-dimensional structural diagram of the upper anchoring component in Embodiment 1;

[0025] Figure 6 This is a three-dimensional structural diagram of the buffer ring in Example 1;

[0026] In the figure: rubber body 11, partition 12, pressure-bearing steel plate 13, baffle 21, center hole 211, buffer ring 22, anchor steel bar 31, fastening bolt 32, support steel plate 4, pad 5, pad stone 6, reserved hole, epoxy mortar 62, upper component 7. Detailed Implementation

[0027] The present invention will be further described below with reference to the embodiments and accompanying drawings: Example 1

[0028] like Figure 1 , Figure 3 and Figure 5 As shown, the elastic support includes an anchoring assembly and an elastic support fixture. An upper anchoring assembly and a lower anchoring assembly are respectively installed at the upper and lower ends of the elastic support fixture. Both the upper and lower anchoring assemblies include an anchor steel rod 31, a fastening bolt 32, and a baffle 21. The baffle 21 has a central hole 211 through it, and an installation hole through it on its outer side. The anchor steel rod 31 has a through threaded hole. One end of the fastening bolt 32 passes through the installation hole of the baffle 21 and is tightened into the threaded hole of the anchor steel rod 31.

[0029] The elastic support fixture includes a support steel plate 4 with a through-hole on the support steel plate 4. The through-hole on the support steel plate 4 matches the through-hole on the outer side of the baffle 21. The support steel plate 4 is mounted on the baffle 21. One end of the fastening bolt 32 passes through the through-holes of the baffle 21 and the support steel plate 4 from below and is tightened into the threaded hole of the anchor steel rod 31, thereby fixing the upper anchoring assembly to the support steel plate 4.

[0030] The elastic support fixture also includes a rubber body 11, partitions 12, and a pressure-bearing steel plate 13. Both partitions 12 and the pressure-bearing steel plate 13 are vulcanized within the rubber body 11, forming a laminated elastic body. Pressure-bearing steel plates 13 are positioned above and below the partitions 12, with the rubber body 11 filling the space between the partitions 12 and the pressure-bearing steel plates 13. The partitions 12 and the pressure-bearing steel plates 13 are layered and embedded within the rubber body 11. The partitions 12 and 13 are arranged parallel to each other, and the space between each partition is also filled with rubber body 11. Since the thickness of the pressure-bearing steel plate 13 is preferably 4 to 6 times that of the partitions 12, it possesses strong vertical compressive strength. Therefore, the aforementioned laminated elastic body exhibits high vertical stiffness and low horizontal stiffness.

[0031] like Figure 1 , Figure 3 , Figure 4 and Figure 6As shown, a pad 5 is provided below the elastic support fixture. The pad 5 is a chamfered cuboid. The upper end of the elastic support fixture is embedded in the central hole 211 of the upper anchoring component, and the lower end of the elastic support fixture, the pad 5, and the buffer ring 22 are all embedded in the central hole 211 of the baffle 21 of the lower anchoring component. The buffer ring 22 is annular. The inner side of the buffer ring 22 is pressed against the rubber body 11 at the lower end of the elastic support fixture, and the outer side of the buffer ring 22 is pressed against the inner side of the baffle 21 of the lower anchoring component.

[0032] Figure 1 The distance between the rubber body 11 and the inner side of the baffle 21 is Δd. Figure 6 The thickness of the buffer ring 22 is t, and the buffer ring 22 is installed between the rubber body 11 and the inner side of the baffle 21. The buffer ring 22 plays a role in horizontal buffering and coordinating deformation, improving the force transmission path from the elastic support fixture to the annular baffle 21, and reducing local stress concentration and uneven loading. In this embodiment, the thickness t of the buffer ring 22 is equal to Δd, and it is prefabricated in the factory. When a certain amount of sliding is required between the elastic support fixture and the pad 6, the thickness t of the buffer ring 22 can also be designed to be less than Δd. The value of (Δd-t) can be designed with reference to the allowable relative sliding amount between the two.

[0033] like Figures 1 to 6 As shown, the lower end of the elastic support is installed in the pad 6, and the upper end is installed in the upper component 7. The specific installation process is as follows: First, a reserved hole is set on the top surface of the pad 6. The pad plate 5 is placed on the pad 6, and the anchor steel rod 31 and the lower fastening bolt 32 from the lower anchoring assembly are placed together in the reserved hole. Then, epoxy mortar 62 is injected into the reserved hole and filled until it flows out from the bottom surface of the lower annular baffle 21. Then, the fastening bolt 32 from the upper anchoring assembly is passed through the baffle 21, the support steel plate 4, and the anchor steel rod 31 in sequence and tightened in the upper component 7, thereby completing the installation of the entire elastic support.

[0034] In summary, the structure of this embodiment can be easily disassembled and replaced by removing the upper and lower fastening bolts 32 and slightly lifting the beam, thus facilitating the removal and replacement of the annular baffle 21 and the elastic body. The elastic body support is designed with a regular, uniform cross-sectional shape, reducing mold and production costs. The annular baffle 21 and the bearing steel plate 13 inside the elastic body support are designed with equal thickness, enabling efficient use of steel and improving the product's economic efficiency. By creating a gap between the elastic body support and the annular baffle 21, a friction pair is formed between the upper and lower surfaces of the elastic body, which can dissipate seismic energy and reduce structural damage under earthquake action. Furthermore, after slightly lifting the upper structure, removing the eight fastening bolts 32 allows for convenient and reliable removal of the elastic body and the annular baffle 21. The height adjustment shims 5 allow for flexible and convenient adjustment of the support height by filling or removing shims 5 of different quantities and thicknesses directly above or below the elastic body support.

[0035] Obviously, any improvements or modifications made without departing from the principles described in this utility model should be considered within the scope of protection of this utility model.

Claims

1. A maintenance-friendly elastomer support, characterized in that, It includes anchoring components and elastic support fixtures. The upper and lower ends of the elastic support fixtures are respectively provided with upper anchoring components and lower anchoring components. The elastic support fixtures are provided with support steel plates. The upper anchoring components are fixedly connected to the support steel plates. A buffer ring is provided between the lower anchoring components and the elastic support fixtures.

2. The easy-to-maintain elastomer support according to claim 1, characterized in that, The elastic support fixture also includes a rubber body, partitions, and pressure-bearing steel plates. The partitions and pressure-bearing steel plates are vulcanized within the rubber body. Pressure-bearing steel plates are installed above and below the partitions, and the space between the partitions and the pressure-bearing steel plates is filled with rubber.

3. The easy-to-maintain elastomer support according to claim 2, characterized in that, The partitions and pressure-bearing steel plates are embedded in the rubber body in layers. The partitions are set parallel to the pressure-bearing steel plates, and the partitions are also set parallel to each other. The space between the partitions is also filled with rubber.

4. The easy-to-maintain elastomer support according to claim 3, characterized in that, Both the upper and lower anchoring components include an anchor bar, a fastening bolt, and a baffle. The baffle has a central hole that passes through it, and an installation hole that passes through it on the outer side. The anchor bar has a threaded hole that passes through it. One end of the fastening bolt passes through the installation hole of the baffle and is tightened into the threaded hole of the anchor bar.

5. The easy-to-maintain elastomer support according to claim 4, characterized in that, The upper anchoring component is fixedly connected to the support steel plate, which means that the support steel plate has a through-hole, and the through-hole on the support steel plate matches the through-hole on the outside of the baffle. The support steel plate is placed on the baffle, and one end of the fastening bolt passes through the through-hole on the baffle and the support steel plate from below and is tightened into the threaded hole of the anchor steel rod.

6. The easy-to-maintain elastomer support according to claim 5, characterized in that, A pad is also provided below the elastic support fixture. The pad is a chamfered rectangular block.

7. The easy-to-maintain elastomer support according to claim 6, characterized in that, The upper end of the elastic support fixture is embedded in the central hole of the upper anchoring component, and the lower end of the elastic support fixture, the pad, and the buffer ring are all embedded in the central hole of the baffle of the lower anchoring component.

8. The easy-to-maintain elastomer support according to claim 7, characterized in that, The buffer ring is annular. The inner side of the buffer ring is pressed against the rubber body at the lower end of the elastic support fixture, and the outer side of the buffer ring is pressed against the inner side of the baffle of the lower anchoring component.

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