Pot type support made of thermoplastic polyurethane elastomer rubber
By adopting thermoplastic polyurethane elastomer rubber pot bearings, and utilizing the excellent adhesion and sliding surface design of TPU material, the problems of reduced elasticity and insufficient durability of traditional bearings at low temperatures are solved, thus achieving efficient seismic resistance and improved durability of bridges in harsh environments.
Patent Information
- Application Number
- CN202520252344.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-02-17
AI Technical Summary
Traditional bridge bearings suffer from reduced elasticity and toughness at low temperatures, resulting in insufficient durability. Furthermore, their manufacturing process causes severe environmental pollution, making them unsuitable for meeting the seismic resistance requirements of bridges in harsh environments.
The thermoplastic polyurethane elastomer rubber pot bearing is adopted, and the groove is set in the middle steel plate. Combined with the excellent adhesion and high durability of TPU material, the seismic energy is dissipated through the sliding surface, thereby increasing the durability and seismic isolation capability of the bearing.
It maintains good elasticity at low temperatures, improves the durability and seismic performance of the bearing, is suitable for harsh environments, reduces construction and maintenance costs, and reduces environmental pollution.
Smart Images
Figure CN223921978U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge construction technology, specifically to a pot-type bearing using thermoplastic polyurethane elastomer rubber. Background Technology
[0002] Bridge bearings are relatively weak links in the seismic performance of bridge structures. Past earthquake damage surveys have shown that bearing damage is significant. However, bearing damage can effectively protect piers and pile foundations, acting as a "fuse-like unit." The frictional slippage of plate rubber bearings under seismic loading can effectively dissipate seismic energy, and bearing damage is highly beneficial to the overall seismic resistance of the bridge. Thermoplastic polyurethane elastomer (TPU) is a new type of synthetic material that falls between rubber and plastic. TPU is a polymer material formed by the reaction of diisocyanate molecules such as diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI) with macromolecular polyols and low-molecular-weight polyols (chain extenders), possessing the advantages of both rubber and plastics.
[0003] The main properties of TPU are: (1) high mechanical strength, excellent high tensile strength, high tensile strength, toughness and aging resistance, and a wide range of adjustable hardness. It is a mature environmentally friendly material; (2) it still has good flexibility and elasticity at low temperatures; (3) there are various material processing methods. TPU has been widely used in medical and health, electronic appliances, industry and sports.
[0004] Traditional lead-core rubber seismic isolation bearings and ordinary plate rubber bearings have certain disadvantages: (1) The elasticity and toughness of the bearings decrease significantly at low temperatures, while TPU still has good elasticity at low temperatures, which can well meet the needs of actual engineering; (2) TPU has better adhesion to steel plates; (3) The durability of traditional bearings under external loads and harsh environments is not as good as that of thermoplastic polyurethane elastomer rubber; (4) The environmental pollution caused by the processing of traditional bearings (lead core) is more serious than that of TPU. Therefore, we conduct research and innovation on the basis of traditional bearings in order to design a TPU pot bearing that can play a better role in seismic isolation and damping, so as to meet the engineering needs in harsher environments. Utility Model Content
[0005] The purpose of this utility model is to provide a thermoplastic polyurethane elastomer rubber pot bearing that aims to improve the seismic performance of bridges under multiple performance targets or multiple levels of ground motion. It has a good limiting effect, improves the performance of the bearing in low-temperature environments, extends the service life of the bearing, and saves bridge construction and maintenance costs.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a thermoplastic polyurethane elastomer rubber basin support, comprising a top plate, a lower rubber plate, and a steel basin. The bottom of the lower rubber plate is in contact with the inner wall of the steel basin. A middle steel plate is provided on the top of the lower rubber plate, and the middle steel plate and the steel basin are fixed together by bolts. A dustproof ring is also provided between the middle steel plate and the steel basin. An upper rubber plate is also provided between the middle steel plate and the top plate. A top steel plate is provided on the top of the upper rubber plate. Sleeves are provided on both sides of the top of the top plate, and anchor bolts are threadedly connected to the inner wall of the sleeves.
[0007] Preferably, brass sealing rings are also provided on both sides of the bottom of the intermediate steel plate to increase sealing performance.
[0008] Preferably, the top and bottom surfaces of the top steel plate, the upper rubber plate, and the lower rubber plate are all planar.
[0009] Preferably, the top surface of the intermediate steel plate is provided with one or more grooves, and the bottom surface of the intermediate steel plate is designed as a plane.
[0010] Preferably, a sliding surface is formed between the top steel plate and the upper rubber plate, and another sliding surface is formed between the upper rubber plate and the middle steel plate.
[0011] Preferably, the depth of the groove on the top surface of the intermediate steel plate is 10-40mm.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] 1. Compared with existing rubber bearings, this utility model adopts a new material that still has good elasticity at low temperatures, excellent adhesion to steel plates, high durability in harsh environments, relatively low environmental pollution during production and use, and can play an excellent role in seismic isolation and damping under earthquake action.
[0014] 2. This utility model provides one or more grooves on the upper surface of the intermediate steel plate. During normal use, the support only undergoes shear deformation and does not slip. Under moderate earthquakes, the rubber plate is allowed to slide out of the first groove, and the seismic energy is dissipated through frictional slippage between the top and bottom surfaces of the support. Under strong earthquakes, the rubber plate is allowed to slide out of the second groove, and the seismic energy is dissipated through greater support displacement.
[0015] 3. In this invention, there is a certain distance between the top plate and the intermediate steel plate. When the horizontal displacement of the support reaches a certain level, the TPU has strong deformation capacity, and the residual deformation during recovery is relatively small, which can well meet the needs of the next deformation. A rubber ring is set on the vertical surface of the intermediate steel plate. The rubber ring can play a certain buffering role. The TPU has outstanding friction resistance and impact resistance, which greatly enhances the durability of the support and avoids serious damage caused by collision.
[0016] 4. The structural design of this utility model is scientific and reasonable, with the advantages of graded control of seismic index and anti-fall beam performance. It has a simple structure, high vertical bearing capacity, and clear damping mechanism. It is suitable for various bridge structures, especially for bridge structure systems with high seismic performance requirements. It meets the engineering needs of harsher environments, improves the durability of the bearings, saves construction and maintenance costs, and reduces the impact on the environment. Attached Figure Description
[0017] Figure 1 This is an elevation view of the present utility model;
[0018] Figure 2 This is a top view of the present invention.
[0019] In the diagram: 1. Sleeve; 2. Top steel plate; 3. Upper rubber plate; 4. Top plate; 5. Dustproof ring; 6. Middle steel plate; 7. Brass sealing ring; 8. Lower rubber plate; 9. Steel basin; 10. Anchor bolt. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] See Figure 1 and Figure 2As shown, a thermoplastic polyurethane elastomer rubber basin support includes, from top to bottom, a top plate 4, a lower rubber plate 8, and a steel basin 9. The bottom of the lower rubber plate 8 is in contact with the inner wall of the steel basin 9. A middle steel plate 6 is provided on the top of the lower rubber plate 8. The middle steel plate 6 and the steel basin 9 are fixed together by bolts. Brass sealing rings 7 are provided on both sides of the bottom of the middle steel plate 6, and the brass sealing rings 7 are in contact with the top of the lower rubber plate 8 to increase the sealing between them. A dustproof ring 5 is also provided between the middle steel plate 6 and the steel basin 9. A further connection is provided between the middle steel plate 6 and the top plate 4. An upper rubber plate 3 is provided, and a top steel plate 2 is provided on the top of the upper rubber plate 3. Sleeves 1 are provided on both sides of the top of the top plate 4. Anchor bolts 10 are threadedly connected to the inner wall of the sleeves 1. The sleeves 1 and the anchor bolts 10 cooperate to fix the top plate 4. The top and bottom surfaces of the top steel plate 2, the upper rubber plate 3, and the lower rubber plate 8 are all flat. The top surface of the middle steel plate 6 is provided with one or more grooves, and the bottom surface is flat. This utility model provides two sliding surfaces, namely the sliding surface between the top steel plate 2 and the upper rubber plate 3 and the sliding surface between the upper rubber plate 3 and the middle steel plate 6.
[0022] The groove on the top surface of the middle steel plate 6 has a depth of 10-40mm, and one of them should be the same width as the upper rubber plate 3.
[0023] The distance between the vertical inner surface of the top plate 4 of the support and the intermediate steel plate 6 should not exceed the allowable limit horizontal displacement of the support. The upper rubber plate 3 is a composite rubber plate composed of a TPU layer and a stiffening steel plate. The full adhesion between the upper rubber plate 3 and the steel plate reduces the shear failure of the support under seismic action.
[0024] To more clearly illustrate the specific usage of this invention, an example is provided below.
[0025] This utility model uses a TPU pot bearing, which mainly consists of a top plate 4, a top steel plate 2, an upper rubber plate 3, a middle steel plate 6, and a lower rubber plate 8. Two grooves are provided on the top surface of the middle steel plate 6, each groove being 15mm deep. The inner groove is the same width as the upper rubber plate 3, and the width of the outer groove is calculated according to the specific structure. The upper rubber plate 3 is placed on the vertical center line of the bearing and is not anchored. The distance between the vertical inner surface of the top plate 4 and the middle steel plate 6 is taken as the bearing's limit displacement. The bearing can be circular or rectangular, but it is important to ensure that the shapes of all components of the bearing are consistent.
[0026] This invention can improve the overall seismic performance of bridges and provide better seismic restraint. This type of bearing has high vertical bearing capacity and good seismic dissipation ability. The use of TPU in the bearing improves its low-temperature deformation capacity and durability, making it suitable for various bridge structures, low-temperature and harsh environments, and especially for bridge structural systems with high seismic performance requirements.
[0027] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.
[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A thermoplastic polyurethane elastomer rubber basin support, comprising a top plate (4), a lower rubber plate (8), and a steel basin (9), characterized in that: The bottom of the lower rubber plate (8) is in contact with the inner wall of the steel basin (9). The top of the lower rubber plate (8) is provided with a middle steel plate (6), and the middle steel plate (6) and the steel basin (9) are fixed to each other by bolts. A dustproof ring (5) is also provided between the middle steel plate (6) and the steel basin (9). An upper rubber plate (3) is also provided between the middle steel plate (6) and the top plate (4). A top steel plate (2) is provided on the top of the upper rubber plate (3). Sleeves (1) are provided on both sides of the top of the top plate (4). An anchor bolt (10) is threadedly connected to the inner wall of the sleeve (1).
2. A thermoplastic polyurethane elastomer rubber pot bearing according to claim 1, characterized in that: The bottom sides of the intermediate steel plate (6) are also provided with brass sealing rings (7) to increase the sealing performance.
3. A thermoplastic polyurethane elastomer rubber pot bearing according to claim 1, characterized in that: The top and bottom surfaces of the top steel plate (2), upper rubber plate (3), and lower rubber plate (8) are all planar.
4. A thermoplastic polyurethane elastomer rubber pot bearing according to claim 1, characterized in that: The top surface of the intermediate steel plate (6) is provided with one or more grooves, and the bottom surface of the intermediate steel plate (6) is designed as a plane.
5. A thermoplastic polyurethane elastomer rubber pot bearing according to claim 1, characterized in that: A sliding surface is formed between the top steel plate (2) and the upper rubber plate (3), and another sliding surface is formed between the upper rubber plate (3) and the middle steel plate (6).
6. A thermoplastic polyurethane elastomer rubber pot bearing according to claim 4, characterized in that: The depth of the groove on the top surface of the intermediate steel plate (6) is 10-40mm.