A multi-dimensional seismic isolation support having a negative poisson's ratio structural form

Abstract

A multi-dimensional shock insulation support with a negative Poisson's ratio structure form, comprising a support upper connecting plate (1) and a support lower connecting plate (2), characterized in that: the support upper connecting plate (1) and the support lower connecting plate (2) are provided with a support body with a negative Poisson's ratio effect, the support body is composed of multiple corrugated steel plates (3), vertical partition plates (4) distributed longitudinally and transversely, and organic elastic material, vertical partition plates (4) are arranged between two adjacent corrugated steel plates (3) longitudinally and transversely, the corrugated steel plate (3) and the vertical partition plate (4) constitute a plurality of deformation cavities (5), and the deformation cavities (5) are filled with elastic filling blocks (6) or filled with elastic material (6), the application is convenient to install, has a long service life, the lateral stiffness and the lateral damping ratio are greatly improved, the tensile property is good, the horizontal limiting force is enhanced, and a good energy dissipation and shock absorption effect can be achieved.

Description

Technical Field

[0001] This invention relates to a seismic isolation bearing, and more particularly to a multidimensional seismic isolation bearing with a negative Poisson's ratio structure, belonging to the field of seismic isolation technology. Background Technology

[0002] In today's era of rapid economic and infrastructure modernization, infrastructure projects such as bridges and rail transit are increasing. In practical construction, bridges, as crucial hubs in rail transit projects, require particularly stringent wind and earthquake resistance design. Bridge bearings, as vital components connecting the superstructure and substructure of a bridge, play a crucial role in force transmission.

[0003] Lead-core rubber bearings are the most widely used bridge bearings due to their excellent performance. They are seismic bearings that improve the damping performance of conventional plate rubber bearings by inserting a lead core. However, since lead-core rubber bearings are an improvement on conventional plate rubber bearings, they inevitably suffer from the shortcomings of traditional plate rubber bearings. Under large horizontal loads such as strong winds and earthquakes, traditional lead-core rubber bearings, due to their limited lateral stiffness and horizontal energy dissipation effect, result in large relative lateral displacements during bearing deformation, posing a certain risk of structural failure.

[0004] Meanwhile, rubber bearings are composite materials that bond rubber and steel plates together through high-temperature vulcanization. When under tension, hollowing and delamination are easily generated between the steel plates and rubber. As a result, conventional rubber seismic isolation bearings have poor tensile performance. In high-intensity seismic zones, high-rise structures often cannot adopt seismic isolation technology due to the tensile problems of rubber bearings. Currently, poor tensile performance has become a fatal defect of rubber seismic isolation bearings.

[0005] Therefore, how to increase the lateral stiffness and lateral damping ratio of traditional lead-core rubber bearings, increase the horizontal limiting force and energy dissipation and vibration reduction effect of the bearings, and improve the tensile performance of rubber bearings have become urgent problems to be solved for traditional lead-core rubber bearings. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing ordinary rubber bearings, which have low lateral stiffness and lateral damping ratio, poor tensile strength, weak horizontal restraining force, and poor energy dissipation and vibration reduction effects. This invention provides a multidimensional seismic isolation bearing with a negative Poisson's ratio structure that is structurally reasonable, easy to install, has significantly improved lateral stiffness and lateral damping ratio, good tensile strength, enhanced horizontal restraining force, and achieves excellent energy dissipation and vibration reduction effects.

[0007] To achieve the above-mentioned objectives, the technical solution of this invention is: a multidimensional seismic isolation bearing with a negative Poisson's ratio structure, comprising an upper connecting plate and a lower connecting plate, wherein a bearing body with a negative Poisson's ratio effect is disposed between the upper connecting plate and the lower connecting plate, the bearing body being composed of multiple corrugated steel plates, longitudinally and transversely distributed vertical partitions, and an organic elastic material, wherein longitudinally and transversely intersecting vertical partitions are disposed between two adjacent corrugated steel plates, and the corrugated steel plates and the vertical partitions constitute multiple deformation cavities, wherein elastic filler blocks or elastic materials are filled into the deformation cavities.

[0008] Furthermore, multiple corrugated steel plates are stacked between the upper connecting plate and the lower connecting plate of the support. The upper end of the vertical partition is connected and fixed to the bottom surface of the upper corrugated steel plate, and the lower end of the vertical partition is connected and fixed to the upper surface of the lower corrugated steel plate.

[0009] Furthermore, the corrugated steel plates are made of corrugated steel plates or zigzag steel plates with the same shape, and two adjacent corrugated steel plates are staggered by 1 / 2 cycle.

[0010] Furthermore, the height of the middle part of the longitudinal direction of the deformable cavity is less than the height of the two ends, and there are parts that are partially separated and interconnected between two adjacent deformable cavities, or there are parts that are completely separated between two adjacent deformable cavities.

[0011] Furthermore, a lead core is provided at the center of the support body, and the lead core is inserted through the center of the corrugated steel plate.

[0012] Furthermore, a rubber protective component is provided on the outer surface of the support body, and the outer surface of the rubber protective component is coated or covered with a corrosion-resistant layer.

[0013] Furthermore, bolt holes are provided around the outer perimeter or at the four corners of the upper connecting plate and the lower connecting plate of the support.

[0014] Furthermore, the elastic filler block is made of rubber or silicone material.

[0015] The beneficial effects of this invention are:

[0016] 1. This invention employs a negative Poisson's ratio honeycomb structure composed of multiple corrugated steel plates, longitudinally and transversely distributed vertical partitions, and organic elastic materials. It exhibits better stability under stress than ordinary rubber bearings and has a negative Poisson's ratio effect. The negative Poisson's ratio structure has a significant energy absorption and seismic isolation effect.

[0017] 2. The corrugated steel plate used in this invention not only increases the contact area between the steel plate and the rubber layer and increases the damping ratio, but also increases the bearing area in the vertical direction, thereby improving the lateral stiffness of the support. More importantly, the unique periodic bending structure of the corrugated steel plate is conducive to forming a porous spatial structure that is conducive to elastic deformation when combined with the vertical partition, while avoiding the phenomenon of lateral bulging of traditional rubber supports under pressure.

[0018] 3. This invention is easy to install, has a long service life, greatly improves lateral stiffness and lateral damping ratio, has good tensile performance, enhances horizontal limiting force, and can achieve good energy dissipation and vibration reduction effects. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention.

[0020] Figure 2 yes Figure 1 A partial structural diagram.

[0021] Figure 3 This is a three-dimensional structural diagram of the corrugated steel plate and vertical partition of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0023] Figure 5 yes Figure 4 A partial structural diagram.

[0024] Figure 6 This is a front cross-sectional view of the support body in Embodiment 2 of the present invention.

[0025] Figure 7 This is a frontal cross-sectional view of the wave crest anisotropy in Embodiment 2 of the present invention.

[0026] Figure 8 This is a top sectional view of the support body in Embodiment 2 of the present invention.

[0027] Figure 9 This is the stress-strain curve of the negative Poisson's ratio honeycomb structure of the present invention.

[0028] Figure 10 This is a schematic diagram of the state of the present invention under stress.

[0029] Figure 11 This is a schematic diagram of the state of the present invention under stress.

[0030] Figure 12 This is a partial structural schematic diagram of the support body of the present invention.

[0031] In the diagram: 1. Upper connecting plate of the support; 2. Lower connecting plate of the support; 3. Corrugated steel plate; 4. Vertical partition; 5. Deformation cavity; 6. Elastic filling block; 7. Rubber protective component; 8. Lead core; 9. Bolt hole. Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] See Figures 1 to 12 The present invention discloses a multidimensional seismic isolation bearing with a negative Poisson's ratio structure, comprising an upper connecting plate 1 and a lower connecting plate 2. The bearing body with a negative Poisson's ratio effect is disposed between the upper connecting plate 1 and the lower connecting plate 2. The bearing body is composed of multiple corrugated steel plates 3, longitudinally and transversely distributed vertical partitions 4, and an organic elastic material. Intersecting vertical partitions 4 are disposed between two adjacent corrugated steel plates 3. The corrugated steel plates 3 and the vertical partitions 4 constitute multiple deformation cavities 5, which are filled with elastic filler blocks 6 or injected with elastic material.

[0034] Multiple corrugated steel plates 3 are stacked between the upper connecting plate 1 and the lower connecting plate 2 of the support. The upper end of the vertical partition 4 is connected and fixed to the bottom surface of the upper corrugated steel plate 3, and the lower end of the vertical partition 4 is connected and fixed to the upper surface of the lower corrugated steel plate 3.

[0035] The corrugated steel plate 3 is made of corrugated steel plate or zigzag steel plate with the same shape, and two adjacent corrugated steel plates 3 are staggered by 1 / 2 cycle.

[0036] The height of the middle part of the longitudinal direction of the deformable cavity 5 is less than the height of the two ends. There are parts that are partially separated and interconnected between two adjacent deformable cavities 5, or there are parts that are completely separated between two adjacent deformable cavities 5.

[0037] A lead core 8 is provided at the center of the support body, and the lead core 8 is provided through the center of the corrugated steel plate 3.

[0038] The outer surface of the support body is provided with a rubber protective component 7, and the outer surface of the rubber protective component 7 is coated or covered with a corrosion-resistant layer.

[0039] Bolt holes 9 are provided around the outer perimeter or at the four corners of the upper connecting plate 1 and the lower connecting plate 2 of the support.

[0040] The elastic filler block 6 is made of rubber or silicone material.

[0041] As attached Figure 1 , Figure 2As shown, the upper connecting plate 1 and lower connecting plate 2 of the bearing used in this invention have the same structure as those in the prior art. However, unlike the prior art, this invention improves upon existing ordinary bridge rubber bearings. The bearing body adopts a negative Poisson's ratio honeycomb structure composed of multiple corrugated steel plates 3, longitudinally and transversely distributed vertical diaphragms 4, and organic elastic materials. The corrugated steel plates 3 replace the traditional straight steel plates, significantly improving lateral stiffness and providing a larger horizontal restraining force for the bearing. While adapting to conventional horizontal deformation, it effectively prevents excessive structural displacement caused by strong winds and earthquakes, thereby significantly improving the lateral damping ratio of the bearing body and achieving excellent vibration reduction. The specific structure and principle are as follows:

[0042] Multiple corrugated steel plates 3 are stacked between the upper connecting plate 1 and the lower connecting plate 2 of the support. The corrugated steel plates 3 are made of corrugated steel plates and zigzag steel plates of the same shape to form a periodic bending structure. The two adjacent corrugated steel plates 3 are staggered by 1 / 2 period. The corrugated steel plates 3 not only increase the contact area with the rubber layer and increase the damping ratio, but also increase the bearing area in the vertical direction, thereby improving the lateral stiffness of the support. More importantly, the unique periodic bending structure of the corrugated steel plates 3 is conducive to forming a porous spatial structure that is conducive to elastic deformation when combined with the vertical partition plate 4.

[0043] Vertical partitions 4 are arranged in a crisscross pattern between two adjacent corrugated steel plates 3. These partitions 4 form multiple compartments in the plane, and the corrugated steel plates 3 and the vertical partitions 4 together constitute multiple deformable cavities 5. The height of the middle part of the deformable cavity 5 in the longitudinal direction is less than the height of the two ends, and the vertical partitions 4 are spaced apart by half a cycle of the corrugated steel plate 3. This allows the vertical partitions 4 to support the corrugated steel plate 3 in the middle part where deformation is likely to occur, creating favorable conditions for the deformable cavity 5 to undergo elastic deformation.

[0044] The deformable cavity 5 is filled with elastic filler blocks 6 or injected with elastic material. The elastic filler blocks 6 are made of rubber or silicone. The elastic filler blocks 6 or other elastic materials completely fill the deformable cavity 5. When the deformable cavity 5 undergoes elastic deformation, the elastic filler blocks 6 or other elastic materials will also undergo elastic deformation. After the external force is removed, the deformable cavity 5 can return to its original position under the action of the elastic filler blocks 6 or other elastic materials. The corrugated steel plate 3, the vertical partition 4, and the rubber elastic filler blocks can be vulcanized into an integral structure.

[0045] The deformable cavity 5 and the vibration damping and isolation bearing of the present invention are squeezed inward after being subjected to force, which is more stable than that of ordinary rubber bearings after being subjected to force. It has a negative Poisson's ratio effect. The negative Poisson's ratio structure has a significant energy absorption and vibration isolation effect. When subjected to vertical load, the negative Poisson's ratio structure makes the corrugated steel plate 3, vertical partition plate 4 and elastic filling block 6 work together to achieve excellent vibration damping and isolation effect. It improves the shortcomings of poor tensile performance of traditional rubber bearings, avoids the phenomenon of side bulging that is easy to occur under pressure in traditional rubber bearings, improves the safety of the bearing, and extends its service life.

[0046] In addition, a rubber protective component 7 is provided on the outer surface of the bearing body to prevent significant deformation of the bearing body from affecting its normal use. The outer surface of the rubber protective component 7 is coated or covered with a corrosion-resistant layer to prevent corrosion and aging of the bearing and extend its service life. Bolt holes 9 are provided around the outer perimeter or at the four corners of the upper connecting plate 1 and the lower connecting plate 2 of the bearing. The upper connecting plate 1 and the lower connecting plate 2 of the bearing can be easily connected to the bridge, seismic isolation structure or its supporting foundation by welding or bolting.

[0047] In addition, the present invention can have two adjacent deformation cavities 5 partially separated yet interconnected, or two adjacent deformation cavities 5 completely separated. This allows for adjustment of the connectivity of the rubber layer by setting the corrugated steel plate 3 and / or the vertical partition 4 to partially or completely separate them according to actual performance requirements, thereby adjusting the damping ratio and other properties of the present invention. Furthermore, the present invention can further improve the tensile strength of the support body by providing a lead core 8 at the center of the support body, providing better mechanical properties for the seismic isolation support and ensuring its optimal working condition.

[0048] The above description is a further detailed explanation of the present invention in conjunction with specific embodiments. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple substitutions, improvements and changes can be made to the present invention without departing from the concept of the present invention. All such simple substitutions, improvements and changes should be considered to fall within the protection scope of the present invention.

Claims

1. A multidimensional seismic isolation bearing with a negative Poisson's ratio structure, comprising an upper connecting plate (1) and a lower connecting plate (2), characterized in that: A support body with a negative Poisson's ratio effect is provided between the upper connecting plate (1) and the lower connecting plate (2) of the support. The support body is composed of multiple corrugated steel plates (3), longitudinally and transversely distributed vertical partitions (4), and organic elastic material. A longitudinally and transversely intersecting vertical partition (4) is provided between two adjacent corrugated steel plates (3). The corrugated steel plates (3) and the vertical partitions (4) constitute multiple deformation cavities (5). Elastic filler blocks (6) or elastic material are filled into the deformation cavities (5). Multiple corrugated steel plates (3) are stacked between the connecting plate (1) and the lower connecting plate (2) of the support. The upper end of the vertical partition (4) is connected and fixed to the bottom surface of the upper corrugated steel plate (3), and the lower end of the vertical partition (4) is connected and fixed to the upper surface of the lower corrugated steel plate (3). The two adjacent corrugated steel plates (3) are staggered by 1 / 2 cycle. The height of the middle part of the longitudinal direction of the deformation cavity (5) is less than the height of the two ends. The two adjacent deformation cavities (5) are partially separated and have interconnected parts.

2. The multidimensional seismic isolation bearing with a negative Poisson's ratio structure according to claim 1, characterized in that: A lead core (8) is provided at the center of the support body, and the lead core (8) is provided through the center of the corrugated steel plate (3).

3. A multidimensional seismic isolation bearing with a negative Poisson's ratio structure according to claim 1, characterized in that: The outer surface of the support body is provided with a rubber protective component (7), and the outer surface of the rubber protective component (7) is coated or covered with a corrosion-resistant layer.

4. A multidimensional seismic isolation bearing with a negative Poisson's ratio structure according to claim 1 or 2, characterized in that: Bolt holes (9) are provided around the outer periphery of the upper connecting plate (1) and the lower connecting plate (2) of the support.

5. A multidimensional seismic isolation bearing with a negative Poisson's ratio structure according to claim 1, characterized in that: The elastic filler block (6) is made of rubber or silicone material.

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