Continuous reinforced polyurethane shock insulation support

Abstract

The continuous reinforced polyurethane shock insulation support comprises an upper connecting plate, a lower connecting plate and a shock absorption body fixed between the upper connecting plate and the lower connecting plate, the shock absorption body comprises a polyurethane elastomer, continuous felt cloth layers and steel plate layers, and the continuous felt cloth layers and the steel plate layers are arranged in an up-down overlapping mode. And the uppermost continuous felt cloth layer, the lowermost steel plate layer, the space between the continuous felt cloth layer 3 and the steel plate layer and the peripheries of the continuous felt cloth layer and the steel plate layer are wrapped by integrated polyurethane elastomers. According to the shock insulation support formed by alternately vulcanizing the multiple layers of steel plates, the multiple layers of continuous felt cloth layers and polyurethane, the problem that the overall rigidity of an existing shock insulation support with chopped fibers randomly distributed on a polyurethane base body is obviously lower than that of the steel plates is solved, the shear capacity is enhanced, interlayer stress is dispersed, a polyurethane elastomer and the steel plates are prevented from being delaminated, and the service life of the shock insulation support is prolonged. Through friction energy consumption, the damping ratio is increased, performance failure of the shock insulation support caused by delamination is prevented, the bearing capacity of the shock insulation support is improved, and the service life of the shock insulation support is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of engineering vibration reduction technology, specifically relating to a continuously reinforced polyurethane seismic isolation bearing. Background Technology

[0002] The technological development of polyurethane seismic isolation bearings stems from the limitations of traditional rubber bearings in earthquake protection. Earthquake damage to buildings is primarily manifested as the vertical turbulence of longitudinal waves, the planar shearing of transverse waves, and the combined torsional action of surface waves. The superposition of these three factors easily triggers resonance and progressive collapse. While traditional rubber bearings possess elasticity and deformation capabilities, they suffer from drawbacks such as low vertical load-bearing capacity, poor durability, and insufficient damping, resulting in high maintenance costs. To overcome these bottlenecks, cast-in-place polyurethane elastomers have emerged. For example, patent CN118166642A discloses a fiberboard-reinforced polyurethane high-damping seismic isolation bearing, comprising a fiberboard stiffening layer, a polyurethane elastomer, and a polyurethane protective layer. The fiberboard stiffening layer and the polyurethane elastomer are stacked vertically to form the internal structure of the bearing. The polyurethane protective layer covers the top, bottom, and sides of the internal structure. Both the polyurethane elastomer and the polyurethane protective layer are made of short-cut fiber modified polyurethane materials. This patent proposes a fiberboard stiffening layer that improves the tensile strength, tear strength, and damping performance of the polyurethane elastomer by adding short-cut fibers to the polyurethane material, thereby enhancing the vertical load-bearing capacity and energy dissipation capacity of the bearing. However, since the short-cut fibers are randomly distributed in the polyurethane matrix, its overall stiffness is still significantly lower than that of steel plates. Furthermore, under high load conditions, the fiberboard stiffening layer is prone to permanent degradation of compressive deformation performance due to creep of the polyurethane and debonding at the fiber interface. Therefore, to solve the above problems, a continuously reinforced polyurethane seismic isolation bearing needs to be designed. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a continuously reinforced polyurethane seismic isolation bearing, which is formed by alternating vulcanization of multiple layers of steel plates, multiple layers of continuous felt, and polyurethane. This solves the problem that the overall stiffness of seismic isolation bearings with randomly distributed short fibers in the polyurethane matrix is ​​significantly lower than that of steel plates. It enhances shear resistance, disperses interlayer stress, and prevents delamination between the polyurethane elastomer and the steel plate. At the same time, it increases the damping ratio through frictional energy dissipation, prevents delamination from causing seismic isolation bearing performance failure, and significantly improves the bearing capacity and service life of the seismic isolation bearing.

[0004] The technical solution adopted in this utility model is a continuous reinforced polyurethane seismic isolation bearing, which includes an upper connecting plate, a lower connecting plate, and a damping body fixed between the upper connecting plate and the lower connecting plate. The damping body includes a polyurethane elastomer, a continuous felt layer, and a steel plate layer. Multiple layers of the continuous felt layer and multiple layers of the steel plate layer are stacked vertically, and the uppermost continuous felt layer, the lowermost steel plate layer, and the continuous felt layer and the steel plate layer are all wrapped inside by an integral polyurethane elastomer.

[0005] The continuous felt layer is made of felt with added carbon fiber or glass fiber, and the fiber directions of the felt are laid out in an alternating pattern.

[0006] Furthermore, the thickness of the continuous felt layer ranges from 1 mm to 3 mm, and the thickness of the steel plate layer ranges from 3 mm to 8 mm.

[0007] Furthermore, the polyurethane elastomers of the top and bottom layers of the shock-absorbing body are bonded and fixed to the upper connecting plate and the lower connecting plate, respectively.

[0008] Furthermore, both the upper connecting plate and the lower connecting plate are steel plates.

[0009] Advantages of this utility model compared to the prior art:

[0010] 1. The seismic isolation bearing formed by the alternating vulcanization of multi-layer steel plates, multi-layer continuous felt cloth, and polyurethane in this technical solution solves the problem that the overall stiffness of the current seismic isolation bearing with randomly distributed short fibers in the polyurethane matrix is ​​significantly lower than that of the steel plate.

[0011] 2. The uniformly distributed steel plates in this technical solution provide vertical stiffness for the seismic isolation bearings. The continuous felt layer can be made of felt with added carbon fiber or glass fiber. The shear resistance is enhanced by the staggered fiber direction, the interlayer stress is dispersed, and the delamination of polyurethane elastomer and steel plate is prevented. At the same time, the damping ratio is improved by friction energy dissipation.

[0012] 3. This technical solution has a simple structure, novel design, and reasonable structure. The friction energy dissipation of the polyurethane elastomer and the continuous felt layer is improved compared with the single polyurethane elastomer. The continuous felt layer can effectively suppress the delamination phenomenon between the polyurethane elastomer and the steel plate caused by large horizontal displacement, ensuring the stable performance of the bearing during earthquakes and extending the service life of the bearing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0014] The following will be based on the embodiments of this utility model. Figure 1 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] It should be noted that, unless otherwise stated herein, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0016] In this document, the terms "comprising," "including," or any other variations thereof are intended to cover a 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 limitation, 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.

[0017] Continuously reinforced polyurethane seismic isolation bearings, such as Figure 1 As shown, the device includes an upper connecting plate 1, a lower connecting plate 5, and a damping body fixed between the upper connecting plate 1 and the lower connecting plate 5. Both the upper connecting plate 1 and the lower connecting plate 5 are steel plates. The top and bottom layers of the damping body, consisting of polyurethane elastomers 2, are bonded and fixed to the upper connecting plate 1 and the lower connecting plate 5, respectively. The damping body comprises polyurethane elastomers 2, continuous felt layers 3, and steel plate layers 4. Multiple layers of continuous felt layers 3 and multiple layers of steel plate layers 4 are stacked vertically, and the uppermost continuous felt layer 3, the lowermost steel plate layer 4, and the continuous felt layer 3 and the steel plate layer 4 are connected vertically. The continuous felt layer 3 and the steel plate layer 4 are wrapped inside by an integral polyurethane elastomer 2. In the above structure, the seismic isolation bearing formed by the alternating vulcanization of the multi-layer steel plate 4, the multi-layer continuous felt layer 3, and the polyurethane isolator solves the problem that the overall stiffness of the seismic isolation bearing with randomly distributed short fibers in the polyurethane matrix is ​​significantly lower than that of the steel plate. It enhances the shear resistance, disperses the interlaminar stress, prevents the polyurethane elastomer 2 from delaminating from the steel plate 4, and improves the damping ratio through frictional energy dissipation, preventing the seismic isolation bearing from failing due to delamination. This significantly improves the bearing capacity and service life of the seismic isolation bearing.

[0018] Among the aforementioned seismic isolation bearings, polyurethane elastomer 2 possesses high load-bearing capacity and high friction, enabling the seismic isolation bearings to provide sufficient frictional resistance while bearing large loads, preventing excessive sliding of the bearings in the horizontal direction. This is crucial for ensuring the stability and safety of bridges and buildings under earthquakes or other dynamic loads. Furthermore, polyurethane elastomer 2 exhibits excellent durability, maintaining stable mechanical properties and seismic isolation effects under long-term repeated loading conditions. In addition, polyurethane materials also possess excellent wear resistance, aging resistance, and weather resistance, allowing the seismic isolation bearings to maintain good performance under various environmental conditions.

[0019] The continuous felt layer 3 is made of felt with added carbon fiber or glass fiber, and the fiber direction of the felt is laid out in an interlaced manner. The interlaced fiber direction enhances the shear resistance, disperses the interlayer stress, prevents the polyurethane elastomer from delaminating from the steel plate, and improves the damping ratio through friction energy dissipation.

[0020] The thickness of the continuous felt layer 3 ranges from 1 mm to 3 mm, and the thickness of the steel plate layer 4 ranges from 3 mm to 8 mm.

[0021] The use of carbon fiber and fiberglass mat can improve the mechanical properties of seismic isolation bearings, enabling them to better perform their seismic isolation function. By optimizing the stiffness and damping characteristics of the bearings, the fundamental period of the building can be adjusted to avoid the main frequency range of earthquakes, thereby reducing the transmission of seismic energy to the building and improving the seismic safety of the building. It also plays a restraining role on the bearing structure, preventing it from undergoing excessive displacement during earthquakes and protecting the structural integrity.

[0022] This technical solution has a simple structure, novel design, and reasonable structure. The friction energy dissipation of polyurethane elastomer 2 and continuous felt layer 3 is improved compared with that of a single polyurethane elastomer. The continuous felt layer 3 can effectively suppress the delamination phenomenon between polyurethane elastomer 2 and steel plate 4 caused by large horizontal displacement, ensuring the stable performance of the bearing during earthquakes and extending the service life of the bearing.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A continuously reinforced polyurethane seismic isolation bearing, characterized by: The shock-absorbing body is composed of polyurethane elastomer (2), continuous felt layer (3) and steel plate layer (4), and the uppermost continuous felt layer (3), the lowermost steel plate layer (4) and the continuous felt layer (3) and the steel plate layer (4) are wrapped by the integral polyurethane elastomer (2) in the inside.

2. The continuously reinforced polyurethane seismic isolation bearing of claim 1, wherein: The continuous felt layer (3) is made of felt with carbon fiber or glass fiber, and the fiber direction of the felt is staggered.

3. The continuously reinforced polyurethane seismic isolation bearing of claim 1, wherein: The thickness of the continuous felt layer (3) is 1mm-3mm, and the thickness of the steel plate layer (4) is 3mm-8mm.

4. The continuously reinforced polyurethane seismic isolation bearing of claim 1, wherein: The polyurethane elastomer (2) of the top layer and the bottom layer of the shock-absorbing body is respectively bonded and fixed with the upper connecting plate (1) and the lower connecting plate (5).

5. The continuous reinforced polyurethane seismic isolation bearing according to any one of claims 1-4, characterized in that: The upper connecting plate (1) and the lower connecting plate (5) are both steel plates.

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