Rigidity-variable and self-resetting tensile rubber shock insulation support
By designing tensile rubber seismic isolation bearings with variable stiffness and self-resetting, the problem of insufficient tensile strength in high-rise buildings has been solved, achieving self-resetting and limiting functions, thereby improving seismic performance and service life.
Patent Information
- Application Number
- CN202423045988.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing tensile isolation bearings have insufficient tensile strength in high-rise buildings, resulting in excessive vertical deformation, which may lead to overall overturning. Furthermore, their poor self-resetting ability cannot effectively limit large deformations, affecting lifespan and safety.
The design of the tensile rubber seismic isolation bearing with variable stiffness and self-resetting is adopted. By sliding the sliding rod and slider, combined with the self-resetting tensile device and shape memory alloy ring, the tensile strength is improved and the self-resetting function is realized, thus limiting large deformation.
It improves tensile strength, limits vertical deformation, achieves self-resetting, enhances seismic performance, reduces structural damage, and extends service life.
Smart Images
Figure CN223497346U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of seismic isolation technology for engineering structures, specifically to a tensile rubber seismic isolation bearing with variable stiffness and self-resetting properties. Background Technology
[0002] In building engineering, seismic design is crucial. Earthquakes are natural disasters that can cause buildings to collapse and be damaged, resulting in casualties and property losses. Therefore, developing a tensile isolation bearing that can effectively resist seismic forces has become a current research hotspot. Due to the large height-to-width ratio of high-rise buildings and the insufficient tensile strength of the isolation bearings, the structure may experience excessive vertical deformation of the isolation layer under rare earthquakes, leading to overall overturning.
[0003] From a practical engineering perspective, tensile seismic isolation devices need to maintain the excellent performance of existing seismic isolation rubber bearings while improving their tensile properties to facilitate their widespread application and enhance their market competitiveness. Currently, lead-core rubber bearings are commonly used for seismic protection. While they effectively reduce the effects of horizontal earthquakes, they cannot reduce vertical vibrations and may even increase vertical seismic response to some extent. Furthermore, they can cause swaying in buildings with large height-to-width ratios. Traditional tensile isolation bearings have low tensile strength, and the bearings may even yield under tension, leading to overall structural overturning and failure. Additionally, existing seismic isolation bearings have poor self-resetting capabilities; the accumulation of small deformations exacerbates bearing failure and reduces their lifespan. Moreover, the stiffness of the tensile components in existing tensile seismic isolation bearing designs is constant, resulting in reduced vertical energy dissipation, which is counterproductive. Therefore, there is an urgent need for a self-resetting, replaceable tensile seismic isolation bearing to avoid damage caused by earthquakes. Utility Model Content
[0004] The purpose of this utility model is to provide a variable stiffness and self-resetting tensile rubber seismic isolation bearing to address the above-mentioned problems. The seismic isolation rubber bearing and the self-resetting tensile bearing are used in combination. By sliding the sliding rod and the slider horizontally, the tensile strength of the bearing is improved and the self-resetting function is obtained. The stops at both ends of the sliding rod can limit the horizontal limit shear of the seismic isolation rubber bearing.
[0005] The technical solution of this utility model is as follows:
[0006] A variable stiffness and self-resetting tensile rubber seismic isolation bearing includes an upper connecting plate and a lower connecting plate. The upper and lower connecting plates are equipped with seismic isolation rubber bearings. A longitudinal circular slide rod and a transverse circular slide rod are respectively provided on the inner side of the lower surface edge of the upper connecting plate and the inner side of the upper surface edge of the lower connecting plate. Both ends of the transverse and longitudinal circular slide rods are provided with stops. Sliding blocks are slidably mounted on both the transverse and longitudinal circular slide rods. A self-resetting tensile device is provided between the sliding blocks of adjacent transverse and longitudinal circular slide rods. The self-resetting tensile device includes a pull plate with holes at the top and bottom, a retainer connected to the pull plate, and a shape memory alloy ring.
[0007] Furthermore, the self-resetting tensile device includes at least two pull plates, each with an upper and lower annular hole. The two pull plates are staggered so that the upper annular hole of one pull plate corresponds to the lower annular hole of the other pull plate, and a grooved rod is provided in the upper and lower annular holes. The grooved rod has grooves extending out of the pull plates at both ends, and shape memory alloy rings are respectively connected between the grooves at both ends of the two grooved rods.
[0008] Furthermore, the grooved rod can move up and down within the annular hole of the pull plate.
[0009] Furthermore, the card holder is connected to the pull plate by bolts.
[0010] Furthermore, the slider is connected to the card holder by welding.
[0011] Furthermore, both the transverse circular slide bar and the longitudinal circular slide bar are welded to the stop block.
[0012] Furthermore, there are two transverse circular slide bars and two longitudinal circular slide bars, and the transverse circular slide bars and the longitudinal circular slide bars are arranged perpendicularly.
[0013] Furthermore, the transverse circular slide bar is located inside the upper surface edge of the lower connecting plate and is spaced apart from the edge.
[0014] Furthermore, the longitudinal circular slide bar is disposed on the inner side of the lower surface edge of the upper connecting plate, and is at a distance from the edge.
[0015] Furthermore, the self-resetting tensile device is located at the four corners of the upper and lower connecting plates.
[0016] Compared with existing technologies, the beneficial effects of this utility model are:
[0017] 1. A variable stiffness and self-resetting tensile rubber seismic isolation bearing, which achieves the tensile anti-overturning function of rubber seismic isolation bearing through tensile components, and can also return to its original position after seismic isolation sway. It solves the problem that in existing seismic isolation rubber bearings, only the bearing core has a certain tensile capacity, and there is no reset and displacement limitation. It can play a significant role in major natural disasters.
[0018] 2. A variable stiffness and self-resetting tensile rubber seismic isolation bearing, wherein the slider moves horizontally along the sliding rod to drive the self-resetting tensile device, and the horizontal seismic isolation effect is not affected under seismic action; for seismic action in different directions, the slider can achieve the aforementioned effect by sliding simultaneously along the transverse circular sliding rod and the longitudinal circular sliding rod.
[0019] 3. A variable stiffness and self-resetting tensile rubber seismic isolation bearing, wherein the stop block restricts the slider from sliding out of the bearing, thereby limiting the adverse effects of large deformation of the bearing;
[0020] 4. A variable stiffness and self-resetting tensile rubber seismic isolation bearing, wherein shape memory alloy rings on both sides of the self-resetting tensile device are under tension. When the external force is unloaded, the restoring force of the shape memory alloy rings can provide a restoring force for the support and has a certain energy dissipation capacity. The grooved rod design prevents the shape memory alloy rings from slipping when subjected to horizontal forces. Attached Figure Description
[0021] Figure 1 This is a structural schematic diagram of a variable stiffness and self-resetting tensile rubber seismic isolation bearing.
[0022] Figure 2 This is a schematic diagram of a self-resetting tensile device for a variable stiffness and self-resetting tensile rubber seismic isolation bearing.
[0023] Figure 3 This is a right view of a variable stiffness and self-resetting tensile rubber seismic isolation bearing.
[0024] Figure 4 This is a schematic diagram of a grooved rod for a variable stiffness and self-resetting tensile rubber seismic isolation bearing.
[0025] Reference numerals: 92-Upper connecting plate, 91-Lower connecting plate, 7-Seismic isolation rubber bearing, 11-Transverse circular slide bar, 12-Longitudinal circular slide bar, 2-Slider, 3-Stop, 4-Self-resetting tensile device, 42-Pull plate, 41-Card holder, 43-Shape memory alloy ring, 42-Pull plate, 44-Groove rod, 45-Bolt. Detailed Implementation
[0026] It should be noted that relational terms such as "first" and "second" are used merely 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.
[0027] The features and performance of this utility model will be further described in detail below with reference to the embodiments.
[0028] Please see Figure 1-4 A type of variable stiffness and self-resetting tensile rubber seismic isolation bearing, such as Figure 1 and Figure 3 As shown, the system includes an upper connecting plate 92 and a lower connecting plate 91. Both the upper and lower connecting plates 92 and 91 are equipped with vibration-damping rubber supports 7. A longitudinal circular slide rod 12 and a transverse circular slide rod 11 are respectively provided on the inner edge of the lower surface of the upper connecting plate 92 and the inner edge of the upper surface of the lower connecting plate 91. Both ends of the transverse circular slide rod 11 and the longitudinal circular slide rod 12 are equipped with stop blocks 3, which limit the horizontal shear stress of the vibration-damping rubber support 7. Sliding blocks 2 are slidably mounted on both the transverse circular slide rod 11 and the longitudinal circular slide rod 12, installed parallel to each other on the connecting plates. The stop blocks 3 block the sliding blocks 2, limiting excessive horizontal displacement. A self-resetting tensile device 4 is provided between the sliding blocks 2 of adjacent transverse circular slide rods 11 and longitudinal circular slide rods 12. The self-resetting tensile device 4 includes a pull plate 42 with holes at the top and bottom, a retainer 41 connected to the pull plate 42, and a shape memory alloy ring 43.
[0029] like Figure 2 As shown, the self-resetting tensile device 4 includes at least two pull plates 42, each with an upper and lower annular hole. The two pull plates 42 are staggered such that the upper annular hole of one pull plate 42 corresponds to the lower annular hole of the other pull plate 42, and a grooved rod 44 is provided in both the upper and lower annular holes. Figure 4 As shown, the grooved rod 44 has grooves extending from the pull plate 42 at both ends, and shape memory alloy rings 43 are respectively connected between the grooves at both ends of the two grooved rods 44. The grooved rod 44 can move up and down within the annular hole of the pull plate 42.
[0030] The bracket 41 is connected to the pull plate 42 by bolts 45. The connection of the pull plate 42 is circular and can rotate left and right around the bolts 45.
[0031] Under minor earthquakes, the self-resetting tensile device 4 has low stiffness, which is beneficial for energy dissipation in the vertical direction. Simultaneously, the shape memory alloy ring 43 also participates in energy dissipation under stress. During major earthquakes, after the grooved rod 44 reaches its maximum displacement set by the annular hole, the tension plate 42 adds stress, increasing the stiffness of the self-resetting tensile device 4 and limiting the occurrence of significant vertical damage. After the earthquake, the force output of the shape memory alloy ring 43 can eliminate the residual deformation of the support, thus achieving a self-resetting function.
[0032] The slider 2 is connected to the bracket 41 by welding. This ensures that the addition of the self-resetting tensile device does not affect the horizontal vibration isolation effect of the fabricated structure.
[0033] Both the transverse circular slide bar 11 and the longitudinal circular slide bar 12 are welded to the stop block 3. There are two transverse circular slide bars 11 and two longitudinal circular slide bars 12, and they are arranged perpendicularly. The transverse circular slide bar 11 is located inside the upper surface edge of the lower connecting plate 91, and is spaced from the edge. The longitudinal circular slide bar 12 is located inside the lower surface edge of the upper connecting plate 92, and is spaced from the edge. The self-resetting tensile device 4 is located at the four corners of the upper connecting plate 92 and the lower connecting plate 91.
[0034] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.
Claims
1. A variable stiffness and self-resetting tensile rubber seismic isolation bearing, characterized in that, The system includes an upper connecting plate (92) and a lower connecting plate (91). The upper connecting plate (92) and the lower connecting plate (91) are provided with vibration isolation rubber supports (7). The inner side of the lower surface edge of the upper connecting plate (92) and the inner side of the upper surface edge of the lower connecting plate (91) are respectively provided with a longitudinal circular slide rod (12) and a transverse circular slide rod (11). Both ends of the transverse circular slide rod (11) and the longitudinal circular slide rod (12) are provided with a stop block (3). A slider (2) is slidably provided on both the transverse circular slide rod (11) and the longitudinal circular slide rod (12). A self-resetting tensile device (4) is provided between the sliders (2) of adjacent transverse circular slide rods (11) and longitudinal circular slide rods (12). The self-resetting tensile device (4) includes a pull plate (42) with holes on the upper and lower surfaces, a card seat (41) connected to the pull plate (42), and a shape memory alloy ring (43).
2. The variable stiffness and self-resetting tensile rubber seismic isolation bearing according to claim 1, characterized in that, The self-resetting tensile device (4) includes at least two pull plates (42), each pull plate (42) having an upper and lower annular holes. The two pull plates (42) are staggered so that the upper annular hole of one pull plate (42) corresponds to the lower annular hole of the other pull plate (42), and a grooved rod (44) is provided in the upper and lower annular holes. The grooved rod (44) has grooves extending out of the pull plates (42) at both ends, and shape memory alloy rings (43) are respectively connected between the grooves at both ends of the two grooved rods (44).
3. The variable stiffness and self-resetting tensile rubber seismic isolation bearing according to claim 2, characterized in that, The grooved rod (44) can move up and down within the annular hole of the pull plate (42).
4. A variable stiffness and self-resetting tensile rubber seismic isolation bearing according to claim 1 or 2, characterized in that, The card holder (41) is connected to the pull plate (42) by bolts (45).
5. A variable stiffness and self-resetting tensile rubber seismic isolation bearing according to claim 1, characterized in that, The slider (2) is connected to the card holder (41) by welding.
6. A variable stiffness and self-resetting tensile rubber seismic isolation bearing according to claim 1, characterized in that, Both the transverse circular slide bar (11) and the longitudinal circular slide bar (12) are welded to the stop block (3).
7. A variable stiffness and self-resetting tensile rubber seismic isolation bearing according to claim 1 or 6, characterized in that, The number of the transverse circular slide bar (11) and the longitudinal circular slide bar (12) are both two, and the transverse circular slide bar (11) and the longitudinal circular slide bar (12) are arranged perpendicularly.
8. A variable stiffness and self-resetting tensile rubber seismic isolation bearing according to claim 7, characterized in that, The transverse circular slide bar (11) is located inside the upper surface edge of the lower connecting plate (91) and is at a distance from the edge.
9. A variable stiffness and self-resetting tensile rubber seismic isolation bearing according to claim 7, characterized in that, The longitudinal circular slide bar (12) is located inside the lower surface edge of the upper connecting plate (92) and is at a distance from the edge.
10. A variable stiffness and self-resetting tensile rubber seismic isolation bearing according to claim 1, characterized in that, The self-resetting tensile device (4) is located at the four corners of the upper connecting plate (92) and the lower connecting plate (91).