An integral three-dimensional seismic isolation bearing

Abstract

The present invention provides an integrated three-dimensional seismic isolation bearing, comprising a plurality of metal ring assemblies, a plurality of elastic steel rods, a top steel plate, and a bottom steel plate. The metal ring assemblies are vertically stacked between the top and bottom steel plates, and comprise a first metal ring and a second metal ring capable of relative vertical movement. A cavity formed by the metal ring assemblies, the top and bottom steel plates is filled with a rubber particle-sand mixture. The elastic steel rods extend through the metal ring assemblies and connect to the top and bottom steel plates. This embodiment can improve vertical seismic isolation performance, the vertical bearing capacity of the bearing, and the horizontal seismic isolation performance of the bearing.

Description

Technical Field

[0001] The present invention relates to the field of seismic isolation technology, and in particular to an integral three-dimensional seismic isolation support. Background Art

[0002] Three-dimensional seismic isolation bearings are devices that achieve vertical and horizontal seismic isolation by reducing compression and shear stiffness. During an earthquake, a building structure experiences both vertical and horizontal vibrations. Using three-dimensional seismic isolation bearings can mitigate the structure's seismic response to a certain extent, preventing damage.

[0003] Among them, the integral isolation bearing is a bearing that has both horizontal and vertical isolation, such as thick rubber isolation bearings and air spring isolation bearings.

[0004] Figure 1 is a structural diagram of a thick rubber isolation bearing, as shown in Figure 1 As shown, thick-layer rubber isolation bearings achieve vertical isolation by increasing the thickness of the rubber layer to reduce vertical stiffness. However, this device uses a large amount of rubber material, resulting in high costs and poor economic efficiency, and a complex manufacturing process. Furthermore, the device lacks the energy dissipation capacity of vertical damping, resulting in slightly poor vertical isolation performance.

[0005] Figure 2 is a structural diagram of the air spring isolation support, as shown in Figure 2 As shown, under external loads, the filler in the air spring isolation bearing undergoes significant compressive deformation due to its low vertical stiffness. It should be noted that the rubber outer layer of the device has limited restraining capacity, resulting in a low vertical bearing capacity. Furthermore, the device has a very low vertical restoring force and poor self-resetting capability. Furthermore, the device has high horizontal shear stiffness, with an ultimate shear deformation of 15%, resulting in poor horizontal isolation performance.

[0006] Therefore, a new type of integral three-dimensional seismic isolation bearing is needed to solve the above problems. Summary of the Invention

[0007] The content of this disclosure is intended to briefly introduce concepts that will be described in detail in the detailed description below. The content of this disclosure is not intended to identify key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0008] Some embodiments of the present invention provide an integral three-dimensional seismic isolation bearing to solve the technical problems mentioned in the above background technology section.

[0009] The integral three-dimensional seismic isolation bearing includes a plurality of metal ring assemblies, a plurality of elastic steel rods, a top steel plate and a bottom steel plate, wherein the plurality of metal ring assemblies are stacked between the top steel plate and the bottom steel plate in the vertical direction, wherein the metal ring assemblies include a first metal ring and a second metal ring capable of relative movement in the vertical direction; the cavity formed by the plurality of metal ring assemblies, the top steel plate and the bottom steel plate is filled with a rubber particle-sand mixture; and the plurality of elastic steel rods are connected to the top steel plate and the bottom steel plate through the metal ring assemblies.

[0010] Optionally, the first metal ring includes a first annular plate and a first connecting ring fixedly connected to the first annular plate; the second metal ring includes a second annular plate and a second connecting ring fixedly connected to the second annular plate, and in the assembled state, the first annular plate is movably connected to the second annular plate.

[0011] Optionally, the first connecting ring and the second connecting ring are both provided with a plurality of vertical elliptical holes. In the assembled state, the first connecting ring is inserted into or sleeved onto the second connecting ring, and the fasteners pass through the vertical elliptical holes.

[0012] Optionally, the first annular plate is engaged with the first annular plate or the second annular plate of an adjacent metal ring assembly.

[0013] Optionally, the elastic steel rod passes through the first annular plate and the second annular plate and is connected to the top steel plate and the bottom steel plate.

[0014] Optionally, the fasteners are bolts and nuts.

[0015] Optionally, the top steel plate and the bottom steel plate are connected to the upper building and the lower building respectively.

[0016] Optionally, the top steel plate and the bottom steel plate are provided with bolt holes.

[0017] Optionally, the material used to make the metal ring assembly is aluminum alloy.

[0018] Optionally, the elastic steel rod is made of spring steel.

[0019] The above-mentioned embodiments of the present invention have the following beneficial effects: First, the multiple metal ring assemblies included in the seismic isolation bearing are composed of a first metal ring and a second metal ring that can move relative to each other in the vertical direction. Therefore, when subjected to vertical force, the vertical damping can be increased through the friction between the first metal ring and the second metal ring, thereby improving the vertical seismic isolation performance.

[0020] Furthermore, the lateral deformation of the rubber particle-sand mixture is constrained by the metal ring assembly, thereby improving the vertical bearing capacity of the support.

[0021] In addition, multiple metal ring assemblies are stacked, and when shear deformation occurs, the metal ring assemblies of each layer can shift relative to each other in the horizontal direction, thereby improving the horizontal seismic isolation performance of the support.

[0022] Furthermore, by providing multiple elastic steel rods, the stacked metal ring assemblies can be laterally constrained to prevent instability under compression. When vertical and horizontal deformation occurs, the elastic steel rods can generate vertical and horizontal restoring forces, improving the self-resetting ability of the support.

[0023] Finally, the use of a rubber granule-sand mixture is more economical than the laminated rubber bearings previously mentioned, while also avoiding the processing and vulcanization of rubber sheets. Furthermore, the rubber granules can be sourced from waste tires, increasing material recycling and contributing to a greener and more environmentally friendly design. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 It is a structural diagram of a thick rubber isolation bearing;

[0026] Figure 2 It is a structural diagram of the air spring isolation support;

[0027] Figure 3 A cross-sectional view of an embodiment of an integral three-dimensional seismic isolation bearing of the present invention;

[0028] Figure 4 The figure is a top view of an embodiment of an integral three-dimensional seismic isolation bearing of the present invention.

[0029] Description of reference numerals:

[0030] 1: Top steel plate; 11: Top steel plate bolt hole; 2: Bottom steel plate; 21: Bottom steel plate bolt hole; 3: Rubber particle-sand mixture; 41: First annular plate; 42: First connecting ring; 43: Second annular plate; 44: Second connecting ring; 5: Elastic steel rod; 6: Vertical elliptical hole; 7: Fastener. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0035] See also Figure 3 and Figure 4 , Figure 3 The figure is a cross-sectional view of an embodiment of an integral three-dimensional seismic isolation bearing of the present invention. Figure 4 This is a top view of an embodiment of an integrated three-dimensional seismic isolation support of the present invention. Figure 4 It can also be understood as a top view after removing the top steel plate. Figure 3 and Figure 4 As shown, the integral three-dimensional seismic isolation support includes a top steel plate 1, a bottom steel plate 2, eight elastic steel rods 5 and three metal ring assemblies.

[0036] The top steel plate 1 and bottom steel plate 2 are used to connect the upper structure and the lower structure. As an example, the top steel plate 1 and the bottom steel plate 2 are respectively provided with top steel plate bolt holes 11 and bottom steel plate bolt holes 21, so as to connect the upper structure and the lower structure with bolts.

[0037] The three metal ring assemblies are stacked vertically between the top steel plate 1 and the bottom steel plate 2. When the support is subjected to force and produces horizontal deformation, the metal ring assemblies of each layer can shift relative to each other in the horizontal direction, thereby improving the horizontal seismic isolation performance of the support.

[0038] Furthermore, the cavity formed by the three metal ring assemblies, the top steel plate 1, and the bottom steel plate 2 is filled with a rubber particle-sand mixture 3. This allows the three metal ring assemblies to constrain the lateral deformation of the rubber particle-sand mixture 3, thereby improving the vertical bearing capacity of the bearing. The rubber particle-sand mixture 3 can be a mixture of rubber particles, sand, and aluminum alloy. Furthermore, the damping effect generated by the mutual friction between the rubber particle-sand mixture can enhance the seismic isolation performance of the bearing.

[0039] In some embodiments, each metal ring assembly includes a first metal ring and a second metal ring capable of vertical relative motion with the first metal ring. For example, the first metal ring can be nested onto the second metal ring, with a sliding block positioned on the inner wall of the first metal ring and a sliding groove positioned on the outer wall of the second metal ring. In the assembled state, the sliding block fits into the sliding groove, enabling relative motion between the first and second metal rings, thereby increasing vertical damping through the generated friction.

[0040] In some optional implementations of some embodiments, the first metal ring may include a first annular plate 41 and a first connecting ring 42 fixedly connected to the first annular plate 41. The second metal ring includes a second annular plate 43 and a second connecting ring 44 fixedly connected to the second annular plate 43, so that the cross-sections of the first metal ring and the second metal ring are two symmetrical L-shapes. In the assembled state, the top first annular plate 41 is engaged with the inner wall of the top steel plate 1, and the second annular plate 43 is engaged with the first annular plate 41 of the adjacent metal ring assembly. It should be noted that the second annular plate 43 can also be engaged with the second annular plate 43 of the adjacent metal ring assembly, and the metal ring assembly can be turned over and assembled. Therefore, the first annular plate 41 or the second annular plate 43 of the bottom metal ring assembly can be engaged with the bottom steel plate 2.

[0041] The above-mentioned sleeve-mounted or inserted arrangement of the first metal ring and the second metal ring can also confine the rubber particle-sand mixture without leakage.

[0042] Furthermore, a consistent number of vertical elliptical holes 6 can be provided on the circumference of the first and second connecting rings 42, 44. In the assembled state, the first connecting ring 42 is inserted into the second connecting ring 44, and the fasteners 7 pass through the vertical elliptical holes 6 to connect the first and second connecting rings 42, 44. In this way, the vertical elliptical holes 6 provide space for the first and second connecting rings 42, 44 to move vertically. It should be noted that the first connecting ring 42 can also be configured to be sleeved onto the second connecting ring 44, and those skilled in the art can adjust this according to actual circumstances.

[0043] It should be noted that although Figure 3 While three metal ring assemblies are stacked, this number is not limited. Those skilled in the art may adjust the number of metal ring assemblies based on practical needs, without departing from the scope of the present invention. For example, the metal ring assemblies may be made of aluminum alloy to reduce the weight of the support.

[0044] The eight elastic steel rods 5 are arranged axially in a vertical direction around the metal ring assembly. Specifically, the ends of the elastic steel rods 5 are welded to the top steel plate 1 and the bottom steel plate 2. The elastic steel rods 5 pass through the first annular plate 41 and the second annular plate 43 of all metal ring assemblies. The elastic steel rods 5 can be made of spring steel with a certain degree of rigidity. In this way, the elastic steel rods are welded to the upper and lower steel plates and tightly connected to the metal ring assembly without any gaps. This allows the elastic steel rods to deform along with the support, thereby providing vertical and horizontal restoring forces for the device.

[0045] Furthermore, a high-elastic rubber mold of a certain thickness can be provided to wrap the rubber particle-sand mixture, thereby preventing the rubber particle-sand mixture from entering the gap at the connection between the first connecting ring and the second connecting ring during vibration, thereby improving the sealing of the device.

[0046] It should be noted that although Figure 3 and Figure 4 The example shown is 8 elastic steel rods, but the number of elastic steel rods is not unique. Those skilled in the art can adjust the number of elastic steel rods according to actual conditions, but such changes do not exceed the scope of protection of the present invention.

[0047] Finally, the working process of the support is explained.

[0048] When the support is subjected to a compressive external load, the filled rubber particle-sand mixture will be compressed and produce vertical compression deformation. At this time, the first connecting ring and the second connecting ring will shift up and down at the vertical elliptical hole, thereby achieving vertical seismic isolation performance. The vertical friction generated by the up and down shifting of the first and second connecting rings on each layer and the vertical friction of the materials in the rubber particle-sand mixture can provide vertical damping, thereby improving the vertical seismic isolation performance of the support. In addition, the elastic steel rod will also produce vertical compression deformation. After compression, the elastic steel rod will generate a vertical restoring force, allowing the device to slowly recover vertically.

[0049] When the bearing is subjected to an outward shear load, the filled rubber particle-sand mixture will be sheared and produce horizontal shear deformation. At this time, relatively independent horizontal displacement will occur between the layers of metal ring assemblies, thereby achieving horizontal seismic isolation performance. The horizontal displacement of the metal ring assemblies will generate horizontal friction. Combined with the horizontal friction between the materials in the rubber particle-sand mixture, it will provide horizontal damping for the device and improve the horizontal seismic isolation performance of the bearing. In addition, the elastic steel rod will also produce horizontal shear deformation. After shearing, the elastic steel rod will generate a horizontal restoring force, allowing the device to slowly recover in the horizontal direction.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integral three-dimensional seismic isolation bearing, characterized in that: It includes multiple metal ring components, multiple elastic steel rods, a top steel plate and a bottom steel plate, wherein: A plurality of the metal ring assemblies are stacked between the top steel plate and the bottom steel plate in a vertical direction, wherein the metal ring assemblies include a first metal ring and a second metal ring capable of relative movement in a vertical direction; The cavity formed by the plurality of metal ring assemblies, the top steel plate and the bottom steel plate is filled with a rubber particle-sand mixture; A plurality of the elastic steel rods are connected to the top steel plate and the bottom steel plate through the metal ring assembly; The first metal ring includes a first annular plate and a first connecting ring fixedly connected to the first annular plate; the second metal ring includes a second annular plate and a second connecting ring fixedly connected to the second annular plate, and in the assembled state, the first annular plate and the second annular plate are movably connected; The first connecting ring and the second connecting ring are both provided with a plurality of vertical elliptical holes. In the assembled state, the first connecting ring is inserted into or sleeved onto the second connecting ring, and the fasteners pass through the vertical elliptical holes.

2. The integrated three-dimensional seismic isolation bearing according to claim 1, characterized in that: The first annular plate is engaged with the first annular plate or the second annular plate of an adjacent metal ring assembly.

3. The integrated three-dimensional seismic isolation bearing according to claim 1, characterized in that: The elastic steel rod passes through the first annular plate and the second annular plate and is connected to the top steel plate and the bottom steel plate.

4. The integrated three-dimensional seismic isolation bearing according to claim 1, characterized in that: The fasteners are bolts and nuts.

5. The integrated three-dimensional seismic isolation bearing according to claim 3, characterized in that: The top steel plate and the bottom steel plate are connected to the upper structure and the lower structure respectively.

6. The integrated three-dimensional seismic isolation bearing according to claim 3, characterized in that: The top steel plate and the bottom steel plate are provided with bolt holes.

7. The integrated three-dimensional seismic isolation bearing according to any one of claims 1 to 6, characterized in that: The material for making the metal ring assembly is aluminum alloy.

8. The integrated three-dimensional seismic isolation bearing according to claim 7, characterized in that: The material used to make the elastic steel rod is spring steel.

Images