Self-resetting waste tire cushion-rigid slide plate isolation bearing
By combining waste tire vibration isolation pads with rigid sliding plate vibration isolation bearings, and utilizing the elastic restoring force of the reset plate and waste tire vibration isolation pads, the residual displacement and energy instability of the vibration isolation bearings are solved, achieving self-reset and multiple energy dissipation. This is suitable for rural and urban buildings, reduces costs, and meets environmental protection goals.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG UNIVERSITY
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-09
AI Technical Summary
Existing seismic isolation bearings are prone to uncontrollable residual displacement and unstable energy dissipation after earthquakes. Traditional limiting devices increase costs and pose a collision risk. Waste tire seismic isolation pads have risks of excessive vertical deformation and leakage of filling material. Sliding friction bearings lack an autonomous reset mechanism.
By combining waste tire vibration isolation pads with rigid sliding plate vibration isolation supports, the sliding range of the slider is limited by the reset plate, and the elastic reset force of the waste tire vibration isolation pads is used to drive the rigid slider to automatically reset, forming multiple energy dissipation paths, avoiding collisions and simplifying the limiting device.
It achieves autonomous reset, stable energy dissipation, reduces residual displacement, improves the reliability of seismic isolation performance prediction, reduces costs, is suitable for rural buildings, and meets the goals of environmental protection and sustainable economic development.
Smart Images
Figure CN224338405U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of structural seismic isolation and vibration control in civil engineering, specifically relating to a self-resetting waste tire seismic isolation pad-rigid sliding plate seismic isolation bearing. Background Technology
[0002] To mitigate earthquake damage to buildings, seismic isolation technology is incorporated into building structural design. This involves installing seismic isolation devices between the foundation and superstructure to reduce the structure's energy dissipation capacity and control the displacement amplitude, thereby reducing the structure's dynamic response and achieving structural protection.
[0003] Rubber bearing seismic isolation technology and sliding friction seismic isolation technology have received attention in recent years, but they still have significant shortcomings in practical engineering applications.
[0004] In the application of rubber bearing seismic isolation technology, natural rubber bearings are widely used due to their good seismic isolation performance. However, their inherent damping is relatively small, and they are prone to irreversible residual deformation after an earthquake, affecting the structure's recovery capacity. To improve energy dissipation efficiency, lead-core rubber bearings provide additional damping through the plastic deformation of the built-in lead core. However, the lead core is at risk of fatigue fracture under repeated loading, and plastic degradation at low temperatures leads to weakened damping. Furthermore, lead materials are expensive and have complex manufacturing processes, limiting their widespread adoption in rural and urban buildings. In addition, the toxicity of lead may cause environmental pollution problems, restricting its sustainable application. Layer-bonded Scrap Tire Pads (LBSTP) are made by cutting waste tires into pieces and then bonding them together with adhesive materials. They utilize the elasticity of tire rubber and interlayer friction to dissipate energy, combining the advantages of resource recycling and carbon reduction. They perform well in the recovery of rural and urban buildings. Their internal wire mesh and cord layers can provide the necessary vertical and horizontal stiffness. However, their reliance on the tire itself for support leads to excessive deformation under pressure, posing a risk of filler leakage and challenging long-term stability.
[0005] In seismic isolation bearings based on the principle of sliding friction, friction pendulum (FPS) and sliding plate (RSB) are the mainstream technologies. SSB includes both elastic and rigid types, with rigid RSB being an example... Figure 1The upper support plate has a sliding mirror on its lower surface, and the bottom of the rigid slider is connected to the lower support plate. The top of the rigid slider is covered with a polytetrafluoroethylene (PTFE) plate. The upper structure is decoupled from the foundation by sliding the PTFE plate and the sliding mirror, and the friction energy dissipation significantly reduces the seismic response. However, its structure lacks a self-resetting mechanism, and it is prone to uncontrollable residual displacement after an earthquake. Traditional RSB bearings rely on external limiting devices to control displacement during major earthquakes. However, limiting devices not only increase costs but may also trigger impact base shear forces during collisions. The peak shear force can be several times the weight of the structure, causing abrupt acceleration of the upper structure and severely weakening the seismic isolation performance. In addition, the random stopping position after the bearing slides makes the energy dissipation performance fluctuate, and the uncertainty of the initial position directly affects the energy dissipation stability. The lack of reset capability and the randomness of energy dissipation of RSB bearings constitute technical bottlenecks: residual displacement requires manual intervention to reset, increasing maintenance costs; and the energy dissipation fluctuations caused by random initial positions introduce uncertainty into the prediction and design of seismic isolation performance.
[0006] Therefore, there is an urgent need for an improved seismic isolation bearing scheme that does not require complex limiting devices and has both self-resetting and stable energy dissipation capabilities, so as to improve the reliability of seismic isolation bearings and reduce application costs. Summary of the Invention
[0007] To address the aforementioned issues, this application provides a self-resetting waste tire vibration isolation pad - a rigid sliding plate vibration isolation support.
[0008] Technical solution of this application:
[0009] A self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support includes a sliding friction vibration isolation element, a reset plate 4 and a tire vibration isolation element;
[0010] The sliding friction isolation element, used to provide sliding friction dissipation of seismic energy, includes an upper support plate 1, a lower support plate 5, a rigid slider 3, and also includes a sliding mirror 6 and a polytetrafluoroethylene plate 2, wherein:
[0011] The lower surface of the upper support plate 1 and the upper surface of the lower support plate 5 are both provided with sliding mirror surfaces 6.
[0012] The rigid slider 3 is a load-bearing component for the vertical load of the support, and polytetrafluoroethylene plates 2 are embedded on both the upper and lower surfaces of the rigid slider 3.
[0013] The upper and lower polytetrafluoroethylene plates 2 of the rigid slider 3 are in contact with the sliding mirror surface 6 on the lower surface of the upper support plate 1 and the sliding mirror surface 6 on the upper surface of the lower support plate 5, respectively. The contact surface between the polytetrafluoroethylene plate 2 and the sliding mirror surface 6 is a friction contact surface.
[0014] The reset plate 4 is located between the upper support plate 1 and the lower support plate 5, and is used to limit the rigid slider 3 of the sliding friction vibration isolation element and to install the tire vibration isolation element.
[0015] The reset plate 4 has a through hole 4-1 in the center, and the rigid slider 3 passes vertically through the through hole 4-1 in the center of the reset plate 4.
[0016] The tire vibration isolation element is used to provide restoring force and partial vibration isolation energy dissipation capacity, and together with the sliding friction vibration isolation element, it realizes multiple energy dissipation of the entire support. Multiple tire vibration isolation elements are installed in two layers between the upper support plate 1 and the lower support plate 5 through the reset plate 4. The upper tire vibration isolation element is fixedly connected between the upper support plate 1 and the reset plate 4, and the lower tire vibration isolation element is fixedly connected between the reset plate 4 and the lower support plate 5.
[0017] Preferably, the sliding mirror 6 is formed by polishing and grinding a stainless steel plate.
[0018] Preferably, the rigid slider 3 is a metal cylindrical structure made of steel.
[0019] Preferably, the through hole 4-1 in the center of the reset plate 4 is circular.
[0020] Furthermore, the tire vibration isolation element includes a waste tire vibration isolation pad 7 and two steel plates 9, which are respectively vulcanized on the top and bottom of the waste tire vibration isolation pad 7.
[0021] Preferably, the upper support plate 1, lower support plate 5, and reset plate 4 adopt a square structure; the eight tire vibration isolation elements are arranged in two layers. The upper and lower steel plates of the waste tire vibration isolation pads of the four upper tire vibration isolation elements are fixed to the four corners of the upper support plate 1 and the reset plate 4 by high-strength bolts 8, and the upper and lower steel plates of the waste tire vibration isolation pads 7 of the four lower tire vibration isolation elements are fixed to the four corners of the reset plate 4 and the lower support plate 5 by high-strength bolts 8.
[0022] Compared with the prior art, this application has the following advantages and beneficial effects:
[0023] This application proposes a self-resetting waste tire rubber isolation pad-rigid sliding plate composite vibration isolation bearing. By coupling the waste tire rubber isolation pad (LBSTP) with the rigid sliding plate vibration isolation bearing (RSB), the environmental friendliness, economy and reset capability of LBSTP are retained, while the high-efficiency friction energy dissipation characteristics of RSB are combined to achieve horizontal multiple energy dissipation and vertical-horizontal bidirectional decoupling function.
[0024] This application introduces a reset plate as a component that works in conjunction with the rigid slider using waste tire rubber vibration isolation pads: During an earthquake, the reset plate constrains the sliding range of the rigid slider, preventing it from sliding off the sliding mirror surface, replacing the traditional limiting device and eliminating the risk of collision; In the post-earthquake phase, the reset plate transmits the elastic reset force generated by LBSTP to the rigid slider, driving it to automatically reset to its initial position without collision, reducing residual displacement and solving the energy consumption fluctuation problem caused by the random stopping of the traditional RSB.
[0025] In this application, the LBSTP and rigid slider adopt a parallel cooperative working mode: the rigid slider bears the vertical load and provides sliding friction energy dissipation, while the LBSTP provides initial stiffness and restoring force. The two functions are independent and complementary. At different displacement stages, the inter-layer friction energy dissipation of the LBSTP and the sliding friction energy dissipation of the rigid slider form multiple energy dissipation paths, which significantly improves the overall energy dissipation efficiency of the support; the self-restoring driven by the LBSTP after the earthquake ensures the energy dissipation stability and position predictability of the support, overcoming the random performance defects of traditional RSB.
[0026] This application integrates the advantages of sliding friction and rubber isolation technologies: the static friction of the rigid slider gives the isolation layer wind resistance and small earthquake stability, while the stiffness control function of LBSTP effectively suppresses the risk of displacement runaway during earthquakes; by setting a reset plate to replace the traditional limit device and using the elastic reset of LBSTP, the three major bottlenecks of traditional RSB, collision disturbance, large residual displacement and energy consumption fluctuation, are solved simultaneously, and there is no risk of lead core fatigue fracture or low temperature failure of lead core rubber bearings.
[0027] Furthermore, the bearing structure of this application is simple, especially with waste tire recycling as its core, combining low cost and environmental protection attributes. Its self-resetting capability eliminates the cost of manual resetting, and the integrated limit-reset design further simplifies the manufacturing process. The bearing of this application is suitable for rural buildings with lighter loads, providing innovative support for promoting economical and reliable seismic isolation technology and contributing to the "dual carbon" target. Attached Figure Description
[0028] Figure 1 A schematic diagram of an existing rigid sliding plate seismic isolation bearing (RSB);
[0029] Figure 2 This is a schematic diagram of the overall shape of the self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support of this application;
[0030] Figure 3 for Figure 2 AA cross-section view;
[0031] Figure 4 This is a schematic front view of the self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support of this application;
[0032] Figure 5This is a schematic diagram of the reset plate in this application;
[0033] Figure 6 This is a schematic diagram of the tire vibration isolation element in this application;
[0034] Figure 7 This is a schematic diagram illustrating the application of the support in this application in an engineering project;
[0035] Figure 8 This is one of the schematic diagrams of the second stage of the movement process of the support in this application;
[0036] Figure 9 This is the second schematic diagram of the second stage of the movement process of the support in this application.
[0037] Figure label:
[0038] 1-Upper support plate; 2-PTFE plate; 3-Rigid slider; 4-Reset plate; 4-1-Round hole; 5-Lower support plate; 6-Sliding mirror;
[0039] 7-Used tire vibration damping pad; 8-High-strength bolt; 9-Steel plate;
[0040] 10 - Upper structure; 11 - Lower structure. Detailed Implementation
[0041] The technical solutions provided in this application will be further described below with reference to specific embodiments and accompanying drawings. The advantages and features of this application will become clearer from the following description.
[0042] Example 1
[0043] like Figures 2-5 As shown, a self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support includes a sliding friction vibration isolation element, a reset plate 4, and a tire vibration isolation element;
[0044] The sliding friction isolation element, used to provide sliding friction dissipation of seismic energy, includes an upper support plate 1, a lower support plate 5, a rigid slider 3, and also includes a sliding mirror 6 and a polytetrafluoroethylene plate 2, wherein:
[0045] The lower surface of the upper support plate 1 and the upper surface of the lower support plate 5 are both provided with sliding mirror surfaces 6.
[0046] The rigid slider 3 is the main load-bearing component for the vertical load of the support, and polytetrafluoroethylene plates 2 are embedded on both the upper and lower surfaces of the rigid slider 3.
[0047] The upper and lower surfaces of the rigid slider 3 are in contact with the sliding mirror 6 on the lower surface of the upper support plate 1 and the sliding mirror 6 on the upper surface of the lower support plate 5, respectively. The contact surface between the PTFE plate 2 and the sliding mirror 6 is a friction contact surface. Both the upper and lower surfaces of the rigid slider 3 can slide on the sliding mirror 6, that is, the self-resetting waste tire vibration isolation pad - rigid sliding plate support has a double sliding surface.
[0048] The reset plate 4 is located between the upper support plate 1 and the lower support plate 5, and is used to limit the rigid slider 3 of the sliding friction vibration isolation element and to install the tire vibration isolation element.
[0049] The reset plate 4 has a through hole 4-1 in the center, and the rigid slider 3 passes vertically through the through hole 4-1 in the center of the reset plate 4.
[0050] The tire vibration isolation element is used to provide restoring force and partial vibration isolation energy dissipation capacity, and together with the sliding friction vibration isolation element, it realizes multiple energy dissipation of the entire support. Multiple tire vibration isolation elements are installed in two layers between the upper support plate 1 and the lower support plate 5 through the reset plate 4. The upper tire vibration isolation element is fixedly connected between the upper support plate 1 and the reset plate 4, and the lower tire vibration isolation element is fixedly connected between the reset plate 4 and the lower support plate 5.
[0051] Preferably, the sliding mirror 6 is formed by polishing and grinding a stainless steel plate.
[0052] Preferably, the rigid slider 3 is a metal cylindrical structure, and its main material is steel.
[0053] Preferably, the through hole 4-1 in the center of the reset plate 4 is circular, and the diameter of the through hole is slightly larger than the diameter of the rigid slider 3.
[0054] Furthermore, such as Figure 6 As shown, the tire vibration isolation element includes a waste tire vibration isolation pad 7 and two steel plates 9, which are vulcanized on the top and bottom of the waste tire vibration isolation pad 7, respectively. The waste tire vibration isolation pad 7 is formed by cutting waste tires into pieces and then stacking them together using adhesive material. The steel plates 9 are provided with threaded connection holes for use with high-strength bolts 8 to fix the steel plates 9 to the upper support plate 1, the lower support plate 5, and the reset plate 4. The tire vibration isolation element provides reset force through the waste tire vibration isolation pad 7, and at the same time, the waste tire vibration isolation pad also provides some vibration isolation and energy dissipation capacity through the interlayer friction of the internal tire pieces during horizontal deformation.
[0055] Preferably, as an embodiment, the upper support plate 1, the lower support plate 5, and the reset plate 4 adopt a square structure; the eight tire vibration isolation elements are arranged in two layers. The upper and lower end steel plates of the waste tire vibration isolation pads of the four upper tire vibration isolation elements are fixed to the four corners of the upper support plate 1 and the reset plate 4 by high-strength bolts 8, and the upper and lower end steel plates of the waste tire vibration isolation pads 7 of the four lower tire vibration isolation elements are fixed to the four corners of the reset plate 4 and the lower support plate 5 by high-strength bolts 8.
[0056] Preferably, as an embodiment, the high-strength bolt 8 is a grade A 8.8 M20.
[0057] Preferably, as an embodiment, the upper support plate 1, the lower support plate 5, and the reset plate 4 are 600mm*600mm in size, and the upper and lower steel plates of the waste tire vibration isolation pad 7 are 180mm*180mm in size.
[0058] The self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support of this application can be regarded as a combined vibration isolation system composed of sliding friction vibration isolation and rubber vibration isolation. The sliding friction vibration isolation element dissipates seismic energy through the sliding friction of the rigid slider 3, and the tire vibration isolation element provides reset force and vibration isolation energy dissipation through the waste tire vibration isolation pad 7.
[0059] The self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation bearing of this application can be applied to the column isolation work of rural buildings or low-rise and mid-rise structures, making up for the lack of widespread use of high-cost vibration isolation technology. Figure 7 As shown, the self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support is set as a vibration isolation layer between the upper structure 10 and the lower structure 11. The vertical load transmitted by the upper structure is borne by the rigid sliding plate 3, while the waste tire vibration isolation pad 7 does not bear the vertical load and only undergoes shear deformation.
[0060] The working principle of the self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support in this embodiment is as follows:
[0061] In the first stage, the support has a large initial stiffness due to the static friction provided by the rigid slider 3. When the horizontal excitation generated by the external force on the superstructure 10 is small (such as strong wind or small earthquake), the bottom shear force on the superstructure 10 is much smaller than the critical value of the sliding friction of the isolation layer. The rigid slider 3 does not slide. At this time, the dynamic response of the self-resetting waste tire isolation pad-rigid sliding plate isolation support is consistent with the traditional seismic resistance.
[0062] The second stage: As the horizontal excitation on the superstructure 10 increases, the bottom shear force on the superstructure 10 exceeds the critical value of the sliding friction of the isolation layer. The rigid slider 3 of the support begins to slide, exerting its isolation effect. The sliding of the rigid slider 3 causes shear deformation of the waste tire isolation pads 7, and interlayer displacement of the tire pieces inside the waste tire isolation pads, resulting in frictional energy dissipation. This achieves multiple energy dissipation of the support system, thereby increasing the natural period of the superstructure 10, deviating from the dominant seismic period, and weakening the seismic response of the superstructure. During the sliding process, when the upper sliding surface of the rigid slider 3 slides to a certain displacement, the shear deformation of the upper and lower layers of waste tire isolation pads 7 is inconsistent. The restoring force provided by the waste tire isolation pads 7 is also different, transmitted to the rigid slider 3 through the reset plate 4. This causes the upper sliding surface to stop sliding, and the lower sliding surface to begin sliding. After sliding to a certain displacement, the lower sliding surface stops sliding, and the upper sliding surface begins sliding, and so on, in a cyclical manner. Figure 8 , Figure 9 As shown, the reset plate uses the reset force of the waste tire vibration isolation pad to limit the rigid slider, thus abandoning the traditional method of limiting the slider by collision with the limiting device.
[0063] Third stage: As the horizontal excitation stops, the reset force provided by the shear deformation of the waste tire vibration isolation pad is greater than the frictional resistance, and the waste tire vibration isolation pad begins to reset under the action of the reset force; at the same time, the reset force provided by the waste tire vibration isolation pad is transmitted to the reset plate, and the reset plate and the rigid slider reset to their original positions at the same time.
[0064] In the embodiment, the reset plate drives the rigid slider to limit and reset without any collision. After each operation, the final position of the rigid slider is basically around the original position. When the rigid slider slides again, the initial position is also basically the same as the original initial position, and the overall vibration isolation performance of the support is more stable.
[0065] This application demonstrates a bidirectional decoupling of the support structure in both horizontal and vertical directions, allowing each component to work collaboratively yet independently. Since the structural load is borne by the rigid slider 3, the waste tire vibration isolation pad 7 does not bear any vertical load. The modular design of the waste tire vibration isolation pad utilizes a dry connection method, eliminating the need for welding or casting equipment, thus meeting the limitations of construction conditions in rural areas. When the waste tire vibration isolation pad ages or becomes damaged, it is not necessary to replace the entire support; only the waste tire vibration isolation pad needs to be removed and replaced, ensuring the uninterrupted functionality of the superstructure.
[0066] The above description is merely a description of preferred embodiments of this application and is not intended to limit the scope of this application in any way. Any changes or modifications made by those skilled in the art based on the above-disclosed technical content should be considered as equivalent and valid embodiments and fall within the scope of protection of the technical solution of this application.
Claims
1. A self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support, characterized in that, Includes sliding friction damping elements, reset plate (4) and tire damping elements; The sliding friction isolation element, used to provide sliding friction dissipation of seismic energy, includes an upper support plate (1), a lower support plate (5), a rigid slider (3), and also includes a sliding mirror (6) and a polytetrafluoroethylene plate (2), wherein: The lower surface of the upper support plate (1) and the upper surface of the lower support plate (5) are both provided with sliding mirrors (6). The rigid slider (3) is a load-bearing component for the vertical load of the support. Polytetrafluoroethylene plates (2) are embedded on both the upper and lower surfaces of the rigid slider (3). The upper and lower polytetrafluoroethylene plates (2) of the rigid slider (3) are in contact with the sliding mirror surface (6) on the lower surface of the upper support plate (1) and the sliding mirror surface (6) on the upper surface of the lower support plate (5), respectively. The contact surface between the polytetrafluoroethylene plate (2) and the sliding mirror surface (6) is a friction contact surface. The reset plate (4) is located between the upper support plate (1) and the lower support plate (5) and is used to limit the rigid slider (3) of the sliding friction vibration isolation element and to install the tire vibration isolation element. The reset plate (4) has a through hole (4-1) in the center, and the rigid slider (3) passes vertically through the through hole (4-1) in the center of the reset plate (4). The tire vibration isolation element is used to provide reset force and partial vibration isolation energy dissipation capacity, and together with the sliding friction vibration isolation element, it realizes multiple energy dissipation of the entire support; multiple tire vibration isolation elements are installed in two layers between the upper support plate (1) and the lower support plate (5) through the reset plate (4). The upper tire vibration isolation element is fixedly connected between the upper support plate (1) and the reset plate (4), and the lower tire vibration isolation element is fixedly connected between the reset plate (4) and the lower support plate (5).
2. The self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support as described in claim 1, characterized in that, The sliding mirror (6) is formed by polishing and grinding stainless steel plate.
3. The self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support as described in claim 1, characterized in that, The rigid slider (3) is a metal cylindrical structure made of steel.
4. The self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support as described in claim 1, characterized in that, The through hole (4-1) in the center of the reset plate (4) is circular.
5. The self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support as described in claim 1, characterized in that, The tire vibration isolation element includes a waste tire vibration isolation pad (7) and two steel plates (9), which are respectively vulcanized on the top and bottom of the waste tire vibration isolation pad (7).
6. The self-resetting waste tire vibration isolation pad-rigid sliding plate vibration isolation support as described in claim 1, characterized in that, The upper support plate (1), lower support plate (5), and reset plate (4) adopt a square structure; the eight tire vibration isolation elements are arranged in two layers. The upper and lower steel plates of the waste tire vibration isolation pads of the four upper tire vibration isolation elements are fixed to the four corners of the upper support plate (1) and reset plate (4) by high-strength bolts (8), and the upper and lower steel plates of the waste tire vibration isolation pads (7) of the four lower tire vibration isolation elements are fixed to the four corners of the reset plate (4) and lower support plate (5) by high-strength bolts (8).