A type of seismic isolation bearing

Abstract

This utility model provides a seismic isolation bearing, including an upper support plate, a lower support plate, a rigid stabilizing core, several rigid load-bearing plates, and an elastic column. The elastic column is disposed between the upper and lower support plates. The top surface of the lower support plate has a spherical notch recess that matches the outer diameter of the elastic column. The intersection of the notch and the top surface of the lower support plate is circular. The bottom surface of the elastic column is disposed within the notch. The rigid stabilizing core is a cylindrical structure with a diameter smaller than that of the elastic column. The rigid stabilizing core is disposed within the elastic column and coaxial with the elastic column. The middle of the notch in the lower support plate and the middle of the upper support plate both have vertical through holes that match the rigid stabilizing core. The rigid stabilizing core passes through the through holes, and the bottom surface of the rigid stabilizing core contacts the top surface of the lower support. The rigid load-bearing plates are annular pieces with a diameter smaller than that of the elastic column. The rigid load-bearing plates are evenly and parallel to each other inside the elastic column.

Description

Technical Field

[0001] This utility model relates to the field of seismic technology, specifically to a seismic isolation bearing. Background Technology

[0002] Traditional structural design methods do not consider the impact of staircase stress on the overall structural performance, nor do they account for the seismic effects of staircases. The Wenchuan earthquake damage demonstrated that stairwells in buildings suffer severe damage under strong earthquakes, including serious damage to stair slabs and landing beams. Including seismic isolation bearings at the building location in the overall structural calculations presents two challenges: firstly, the complex force transmission paths within the stairwell itself make it difficult to meet code requirements for the seismic design of its components (staircase beams, columns, slabs, etc.); secondly, the seismic isolation bearings at the building location significantly impact the stiffness, regularity, and load-bearing capacity of the frame structure. This negatively affects the design scheme, workload, and construction costs.

[0003] However, when traditional seismic isolation bearings experience material fatigue or unidirectional stress, the internal stress of the bearing cannot be released, which can easily lead to stress concentration and non-vertical failure of the bearing. This is the main reason for the failure of seismic isolation bearings at stairwell locations.

[0004] Existing patent CN201820884734.4 discloses a tension-resistant seismic isolation bearing device, including a seismic isolation bearing. A liftable cover is connected to the top of the seismic isolation bearing. The liftable cover includes a top plate, a horizontal limiting ring plate, a support plate, and a liftable limiting member. The horizontal limiting ring plate is disposed below the top plate. The support plate is disposed in the inner cavity of the horizontal limiting ring plate and contacts the lower plane of the top plate. The top plate is connected and fixed to an upper support. The seismic isolation bearing is located in the inner cavity of the horizontal limiting ring plate and below the support plate. One end of the liftable limiting member passes through the upper cover plate and the support plate of the seismic isolation bearing and is fixed to the top plate. The other end of the liftable limiting member is a limiting end located below the upper cover plate. The distance between the upper part of the limiting end and the lower plane of the support plate is greater than the thickness of the upper cover plate. The lower end of the seismic isolation bearing is fixed to a lower support. This invention can prevent the seismic isolation bearing from bearing unfavorable tensile forces.

[0005] It is evident that its support plate is a traditional flat plate structure, which makes it difficult to release pressure in other directions. Under long-term unidirectional pressure, it is difficult to avoid material fatigue problems.

[0006] Therefore, a seismic isolation bearing is needed to solve the above problems. Summary of the Invention

[0007] This invention addresses the problems in existing technologies where seismic isolation bearings at building locations are included in the overall structural calculations. On the one hand, the force transmission path in stairwells is complex, making it difficult for the seismic design of their components (stair beams, columns, slabs, etc.) to meet the code requirements. On the other hand, the seismic isolation bearings at building locations have a significant impact on the stiffness, regularity, and bearing capacity of the frame structure. This invention provides a seismic isolation bearing that optimizes the bearing structure layout, thus solving the aforementioned problems.

[0008] This utility model provides a seismic isolation bearing, including an upper support plate, a lower support plate, a rigid stabilizing core, several rigid load-bearing plates, and an elastic column. Both the upper and lower support plates are flat plate structures, arranged horizontally and parallel to each other. The elastic column is an elastic cylinder, positioned between the upper and lower support plates, connecting the bottom surface of the upper support plate and the top surface of the lower support plate. The top surface of the lower support plate has a spherical notch recess that matches the outer diameter of the elastic column. The intersection of the notch and the top surface of the lower support plate is circular. The bottom surface of the elastic column is located within the notch. The rigid stabilizing core is a cylindrical structure, with a diameter smaller than that of the elastic column. The core is set inside the elastic column and is coaxial with the elastic column. The middle of the recess of the lower support plate and the middle of the upper support plate are both vertically provided with through holes to match the rigid stabilizing core. The two ends of the rigid stabilizing core pass through the through holes of the upper support plate and the lower support plate, respectively. The bottom surface of the rigid stabilizing core contacts the top surface of the lower support. An elastic patch is set between the top surface of the rigid stabilizing core and the bottom surface of the upper support. The rigid force-bearing patch is an annular piece with a diameter smaller than that of the elastic column. The rigid force-bearing patches are evenly and parallel to each other inside the elastic column. The hole in the middle of the rigid force-bearing patch matches the rigid stabilizing core. The gaps between adjacent rigid force-bearing patches are filled with the elastic material of the elastic column.

[0009] In a preferred embodiment of the seismic isolation bearing described in this utility model, both the upper and lower support plates are square plates. Each upper and lower support plate has eight mounting through holes along the outer periphery of the contact circle of the elastic column. Each of the four corners of the upper and lower support plates has a stabilizing through hole. The stabilizing through holes are all located on the intersection lines of the four corners of the upper and lower support plates. The distances from the stabilizing through holes to the two nearest mounting through holes are equidistant. The upper support plate is fastened to the bottom surface of the upper support pier through the stabilizing through holes and the mounting through holes, and the lower support plate is fastened to the top surface of the lower support pier through the stabilizing through holes and the mounting through holes.

[0010] In a preferred embodiment of the seismic isolation bearing described in this utility model, the elastic column is made of polyvinyl chloride and is placed between the rigid load-bearing plates at the top and bottom. The material of the rigid load-bearing plates wrapped around the elastic column is elastomeric modified asphalt.

[0011] In a preferred embodiment of the seismic isolation bearing described in this utility model, the diameter of the stabilizing through hole is larger than that of the mounting through hole.

[0012] The beneficial effects of this utility model are as follows:

[0013] Existing elastic panels are often based on columnar structures with elastic designs, but they have limited space for movement and earthquake resistance when in use. Especially when the building has a large self-weight, the material is often compressed and cannot move effectively, resulting in stress concentration and difficulty in releasing stress. This device uses a spherical surface structure for moving contact and releases stress through friction pairs to achieve effective shock absorption. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a seismic isolation bearing.

[0015] Figure label:

[0016] 1. Upper support plate; 2. Lower support plate; 3. Rigid stabilizing core; 4. Rigid load-bearing plate; 5. Elastic column. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Example 1

[0019] like Figure 1 As shown, a seismic isolation bearing includes an upper support plate 1, a lower support plate 2, a rigid stabilizing core 3, several rigid load-bearing plates 4, and an elastic column 5. Both the upper support plate 1 and the lower support plate 2 are flat plate structures, arranged horizontally and parallel to each other. The elastic column 5 is an elastic column body, positioned between the upper support plate 1 and the lower support plate 2, connecting the bottom surface of the upper support plate 1 and the top surface of the lower support plate 2. The top surface of the lower support plate 2 has a spherical notch recess that matches the outer diameter of the elastic column 5. The intersection of the notch and the top surface of the lower support plate 2 is circular. The bottom surface of the elastic column 5 is located within the notch. The rigid stabilizing core 3 is a cylindrical structure, with a diameter smaller than that of the elastic column 5. 3. The rigid stabilizing core 3 is set inside the elastic column 5 and is coaxial with the elastic column 5. The middle of the recess of the lower support plate 2 and the middle of the upper support plate 1 are both vertically provided with through holes that match the rigid stabilizing core 3. The two ends of the rigid stabilizing core 3 pass through the through holes of the upper support plate 1 and the lower support plate 2, respectively. The bottom surface of the rigid stabilizing core 3 contacts the top surface of the lower support. An elastic patch is set between the top surface of the rigid stabilizing core 3 and the bottom surface of the upper support. The rigid force-bearing plate 4 is an annular plate. The diameter of the rigid force-bearing plate 4 is smaller than the diameter of the elastic column 5. The rigid force-bearing plates 4 are evenly and parallel to each other inside the elastic column 5. The hole in the middle of the rigid force-bearing plate 4 matches the rigid stabilizing core 3. The gaps between adjacent rigid force-bearing plates 4 are filled by the elastic material of the elastic column 5.

[0020] In this embodiment, both the upper support plate 1 and the lower support plate 2 are square plates. Both the upper support plate 1 and the lower support plate 2 have 8 mounting through holes along the outer periphery of the contact circle of the elastic column 5. Each of the four corners of the upper support plate 1 and the four corners of the lower support plate 2 is provided with a stabilizing through hole. The stabilizing through holes are all located on the intersection line of the four corners of the upper support plate 1 and the intersection line of the four corners of the lower support plate 2. The distance from the stabilizing through hole to the two nearest mounting through holes is equidistant. The upper support plate 1 is fastened to the bottom surface of the upper support pier through the stabilizing through holes and the mounting through holes, and the lower support plate 2 is fastened to the top surface of the lower support pier through the stabilizing through holes and the mounting through holes.

[0021] Preferably, the elastic column 5 is made of polyvinyl chloride when it is placed between the rigid force-bearing plates 4, at the top and bottom, and the material that wraps the rigid force-bearing plates 4 around the elastic column 5 is elastomeric modified bitumen.

[0022] This device uses an arc-shaped structure to release stress, which may increase the lateral displacement of the support. In order to meet the stability requirements, it is necessary to install and strengthen the overall structure through a stabilizing through hole. In this embodiment, the diameter of the stabilizing through hole is larger than that of the mounting through hole.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A seismic isolation bearing, characterized in that: The system includes an upper support plate (1), a lower support plate (2), a rigid stabilizing core (3), several rigid load-bearing plates (4), and an elastic column (5). The upper support plate (1) and the lower support plate (2) are both flat plate structures, and are arranged horizontally and parallel to each other. The elastic column (5) is an elastic column body, located between the upper support plate (1) and the lower support plate (2), connecting the bottom surface of the upper support plate (1) and the top surface of the lower support plate (2). The top surface of the lower support plate (2) has a spherical notch recess that matches the outer diameter of the elastic column (5). The intersection of the notch and the top surface of the lower support plate (2) is circular. The bottom surface of the elastic column (5) is located within the notch. The rigid stabilizing core (3) is a cylindrical structure, with a diameter smaller than that of the elastic column (5). The rigid stabilizing core (3) is provided with… The rigid stabilizing core (3) is placed inside the elastic column (5) and is coaxial with the elastic column (5). The middle part of the recess of the lower support plate (2) and the middle part of the upper support plate (1) are both vertically provided with through holes that match the rigid stabilizing core (3). The two ends of the rigid stabilizing core (3) pass through the through holes of the upper support plate (1) and the lower support plate (2) respectively. The bottom surface of the rigid stabilizing core (3) contacts the top surface of the lower support. An elastic patch is provided between the top surface of the rigid stabilizing core (3) and the bottom surface of the upper support. The rigid force-bearing plate (4) is an annular plate. The diameter of the rigid force-bearing plate (4) is smaller than the diameter of the elastic column (5). The rigid force-bearing plates (4) are arranged parallel to each other and uniformly inside the elastic column (5). The hole in the middle of the rigid force-bearing plate (4) matches the rigid stabilizing core (3). The adjacent rigid force-bearing plates (4) are filled by the elastic material of the elastic column (5).

2. The seismic isolation bearing according to claim 1, characterized in that: Both the upper support plate (1) and the lower support plate (2) are square plates. Both the upper support plate (1) and the lower support plate (2) have eight mounting through holes along the outer periphery of the contact circle of the elastic column (5). Each of the four corners of the upper support plate (1) and the four corners of the lower support plate (2) is provided with a stabilizing through hole. The stabilizing through holes are all located on the intersection line of the four corners of the upper support plate (1) and the intersection line of the four corners of the lower support plate (2). The distance from the stabilizing through hole to the two nearest mounting through holes is equal. The upper support plate (1) is fastened to the bottom surface of the upper support pier through the stabilizing through holes and the mounting through holes. The lower support plate (2) is fastened to the top surface of the lower support pier through the stabilizing through holes and the mounting through holes.

3. A seismic isolation bearing according to claim 2, characterized in that: The elastic column (5) is made of polyvinyl chloride and is disposed between the rigid force-bearing sheet (4), at the top and bottom. The material of the elastic column (5) surrounding the rigid force-bearing sheet (4) is elastomeric asphalt.

4. A seismic isolation bearing according to claim 2, characterized in that: The diameter of the stabilizing through hole is larger than that of the mounting through hole.

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