A seismic isolation bearing

Abstract

The utility model belongs to civil engineering technical field discloses a kind of shock insulation support, including support, lower connecting plate and upper connecting plate being respectively arranged in the upper and lower ends of support, the outer surface of support is provided with limit plate unit, is fixedly connected with lower connecting plate, upper connecting plate by connecting piece, limit plate unit is provided with limit magnet and connecting plate in, the connecting plate is fixedly connected between two adjacent limit magnets with support and is arranged, limit plate unit includes lower vertical limit plate and upper vertical limit plate, by "mechanical-magnetic attraction" composite locking design, when support is subjected to vertical tension, limit magnet instantaneously adsorbs connecting plate, forms reliable mechanical connection, effectively resists pullout force, support is vertically alternately composed of rubber gasket and steel plate, can be fully deformed in horizontal direction to dissipate seismic energy;Vertical through the synergistic effect of steel plate and rubber, provide high bearing capacity, adapt to the high vertical load demand of high-rise building.

Description

Technical Field

[0001] This utility model belongs to the field of civil engineering technology and relates to a seismic isolation bearing. Background Technology

[0002] Seismic isolation technology, as a key measure to improve the seismic performance of building structures, has been widely used in engineering practice. Traditional rubber seismic isolation bearings mainly include laminated rubber bearings and lead-core rubber bearings, which can effectively reduce the seismic response of the superstructure in isolating horizontal seismic motions. By absorbing and dissipating seismic energy through the shear deformation of the rubber layers, the safety of buildings under strong earthquakes is significantly improved.

[0003] However, traditional rubber seismic isolation bearings primarily focus on resisting horizontal seismic forces. When faced with vertical seismic forces, strong wind suction, or significant uplift forces caused by explosive impacts, they are prone to various failure modes, leading to complete failure of the seismic isolation function. Specifically: the bonding interface between the rubber layer inside the bearing and the reinforcing steel plate is highly susceptible to debonding and peeling under continuous or severe tensile stress, severely damaging the integrity and force transmission mechanism of the bearing; when lead-core rubber bearings are subjected to large uplift forces, the lead core is easily pulled out of the bearing, and the bearing itself may also break due to insufficient tensile strength, or detach from the connecting components, thus losing its seismic isolation capability. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a seismic isolation bearing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a seismic isolation bearing, comprising: a bearing, a lower connecting plate and an upper connecting plate respectively disposed at the upper and lower ends of the bearing, a limiting plate unit disposed on the outer surface of the bearing, which is fixedly connected to the lower connecting plate and the upper connecting plate by a connecting member, a limiting magnet and a connecting plate disposed within the limiting plate unit, and the connecting plate being disposed between two adjacent limiting magnets and fixedly connected to the bearing.

[0007] Furthermore, the limiting plate unit includes a lower vertical limiting plate and an upper vertical limiting plate, both of which have U-shaped cross-sections.

[0008] Furthermore, the lower end of the lower vertical limiting plate is fixedly connected to the lower connecting plate, the upper end of the upper vertical limiting plate is fixedly connected to the upper connecting plate, and the upper end of the lower vertical limiting plate and the lower end of the upper vertical limiting plate are provided with positioning grooves, and the limiting magnet is fixedly installed in the positioning grooves.

[0009] Furthermore, the support is composed of alternating vertical rubber pads and steel plates.

[0010] Furthermore, the connecting plate is disposed between the lower vertical limiting plate and the upper vertical limiting plate, and is fixedly connected to the support.

[0011] Furthermore, a lead core column is provided on the inner surface of the support, and a protective sleeve is provided on the outer surface. Both the lead core column and the protective sleeve are fixedly connected to the lower connecting plate and the upper connecting plate.

[0012] Furthermore, the lower connecting plate and the upper connecting plate are provided with a first connecting hole and a second connecting hole from the inside out.

[0013] Furthermore, the first connection hole is used for detachable connection with the lower connection plate and the upper connection plate via a connector.

[0014] Furthermore, the second connection hole is used for detachable connection with the upper or lower connection component via a connector.

[0015] Furthermore, the connecting element is a bolt.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] This utility model discloses a seismic isolation bearing. Through a "mechanical-magnetic" composite locking design, when the bearing is subjected to vertical tension, the limiting magnet instantly attracts the connecting plate to form a reliable mechanical connection, effectively resisting the upward pull force. At the same time, the contact surface between the magnet and the connecting plate is polished, which significantly reduces the coefficient of friction, ensuring free sliding in the horizontal direction and maintaining low horizontal stiffness characteristics.

[0018] This utility model discloses a seismic isolation bearing, which is composed of alternating layers of rubber pads and steel plates, which are vulcanized under high temperature and pressure to form a low-horizontal stiffness laminated composite. In the horizontal direction, it can fully deform to dissipate seismic energy; in the vertical direction, through the synergistic effect of steel plates and rubber, it provides high load-bearing capacity to meet the high vertical load requirements of high-rise buildings; the lead core column, as the damping core, further absorbs seismic energy through plastic deformation, improves the overall energy dissipation efficiency, and reduces the seismic response of the structure. It can simultaneously meet the requirements of horizontal seismic isolation, vertical load-bearing capacity, and energy dissipation, breaking through the limitation of the single function of traditional bearings. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a seismic isolation bearing according to the present invention;

[0020] Figure 2 This is a cross-sectional view of a seismic isolation bearing according to the present invention.

[0021] Figure label:

[0022] 1-Lower connecting plate; 2-Upper connecting plate; 3-Lower vertical limiting plate; 4-Upper vertical limiting plate; 5-Support; 6-Lead core column; 7-Protective sleeve; 8-Connector; 10-Limiting magnet; 11-Connecting plate; 12-Second connecting hole. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] Example 1

[0025] This utility model provides a seismic isolation bearing, such as... Figure 1 As shown, the support includes a support 5, a lower connecting plate 1 and an upper connecting plate 2 respectively disposed at the upper and lower ends of the support 5, a limiting plate unit is provided on the outer surface of the support 5, and is fixedly connected to the lower connecting plate 1 and the upper connecting plate 2 by a connector 8, a limiting magnet 10 and a connecting plate 11 are provided in the limiting plate unit, and the connecting plate 11 is disposed between two adjacent limiting magnets 10 and is fixedly connected to the support 5.

[0026] The lower connecting plate 1, support 5, and upper connecting plate 2 are arranged sequentially from bottom to top. Support 5 is composed of alternating vertical rubber gaskets and steel plates. Specifically, it consists of multiple layers of alternating rubber gaskets and steel plates, with a horizontal connecting plate 10 positioned in the center of support 5. The multiple layers of rubber gaskets, connecting plate 10, and steel plates are vulcanized under high temperature and pressure to form a laminated composite with low horizontal stiffness and high vertical load-bearing capacity. The geometric center of the laminated composite is coaxially pressed into a high-purity lead core column 6, which serves as an additional damping and energy dissipation core. The top layer of the laminated composite is vulcanized with the upper connecting plate 2, and the bottom layer is vulcanized with the lower connecting plate 1, thus clamping and fixing the laminated composite between the upper connecting plate 2 and the lower connecting plate 1. Figure 2 As shown.

[0027] To prevent dust, moisture, and chemical corrosive media from penetrating the laminated composite, a retractable protective sleeve 7 is installed on the outside of the support 5. The connecting plate 10 divides the protective sleeve 7 into upper and lower parts. The upper protective sleeve is tightened to the outer edge of the upper connecting plate 2, and the lower protective sleeve is tightened to the outer edge of the lower connecting plate 1, thereby wrapping the support 5 and the lead core column 6 to form a seal for protection.

[0028] The outer surface of the protective sleeve 7 is provided with a limiting plate unit, which includes a lower vertical limiting plate 3 and an upper vertical limiting plate 4. The cross-section of both the lower vertical limiting plate 3 and the upper vertical limiting plate 4 is U-shaped, and the openings face outward. The upper vertical limiting plate 4 is located at the upper end of the connecting plate 11, and the lower vertical limiting plate 3 is located at the lower end of the connecting plate 11.

[0029] The lower end of the upper vertical limiting plate 4 and the upper end of the lower vertical limiting plate 3 are provided with positioning grooves for placing the limiting magnet 10. The upper end of the upper vertical limiting plate 4 and the lower end of the lower vertical limiting plate 3 are fixedly connected to the lower connecting plate 1 and the upper connecting plate 2 through the connector 8.

[0030] The upper vertical limiting plate 4 and the lower vertical limiting plate 3 maintain a loose contact with the connecting plate 11 and do not bear horizontal loads. The limiting magnet 10 is encapsulated in the lower vertical limiting plate 3 or the upper vertical limiting plate 4 with epoxy resin. The contact surfaces of the limiting magnet 10 and the connecting plate 11 are polished to reduce the coefficient of friction. When the support 5 is subjected to vertical tension, the limiting magnet 10 instantly attracts the connecting plate 11 to form a reliable mechanical-magnetic composite lock, effectively resisting upward pull. Because the coefficient of friction of the contact surface is reduced, the horizontal vibration isolation performance of the entire device is still unaffected.

[0031] Under normal operating conditions, the upper vertical limiting plate 4 and the lower vertical limiting plate 3 maintain a loose contact with the connecting plate 11, meaning there is a slight gap or only slight contact, and no force is transmitted. At this time, the limiting plate unit does not bear horizontal loads, ensuring that the horizontal seismic isolation performance of the support is not affected.

[0032] In summary, when the support 5 is subjected to a significant vertical tensile force, such as a structural pull-out force, the limiting magnet 10 instantly generates a strong magnetic attraction force, firmly adsorbing the lower vertical limiting plate 3 and the upper vertical limiting plate 4 to the upper and lower ends of the connecting plate 11, respectively, forming a reliable mechanical-magnetic composite lock. This effectively resists the pull-out force and prevents the support from failing due to tension. Because the contact surface is polished and has a low coefficient of friction, the adsorption lock, while providing resistance to pull-out force, still ensures that the support maintains low frictional resistance in the horizontal direction, thus not affecting its horizontal vibration isolation performance.

[0033] It should be noted that the distance between the outer surface of the protective sleeve 7 and the upper vertical limiting plate 4 or the lower vertical limiting plate 3 is... The distance between the center of the limiting magnet 10 and the edge of the connecting plate 11 is .

[0034] For the deformation displacement of support 5, from and Choose the smaller value, that is:

[0035] =

[0036] in, The thickness of support 5, The diameter of support 5.

[0037] The width D of the limiting magnet 10 is:

[0038]

[0039] in, To resist pull-out force, The thickness of the limiting magnet 10, For the equivalent air gap, Residual magnetization Let the radius of support 5 be 5. This represents the deformation displacement of support 5.

[0040] The lower connecting plate 1 and the upper connecting plate 2 are provided with a first connecting hole and a second connecting hole 12 from the inside out. The first connecting hole is used for detachable connection with the lower connecting plate 1 and the upper connecting plate 2 through a connector 8, and the second connecting hole 12 is used for detachable connection with the upper connecting component or the lower connecting component through a connector 8. The first connecting hole and the second connecting hole 12 are arranged in the circumferential direction, and the included angle between two adjacent first connecting holes or second connecting holes 12 is the same.

[0041] This utility model relates to a horizontal tensile stage of a seismic isolation bearing:

[0042] The horizontal force of the earthquake causes the upper connecting plate 2 to shift relative to the lower connecting plate 1, the support 5 undergoes shear deformation, and the lead core column 6 undergoes synchronous plastic flow. The support 5 and the lead core column 6 together dissipate the earthquake energy, prolong the natural vibration period of the structure, reduce the acceleration response of the upper structure, and the protective sleeve 7 expands and contracts accordingly to ensure that the internal components are not corroded by the outside.

[0043] This utility model relates to a vertical tensile stage of a seismic isolation bearing:

[0044] When vertical ground vibration or wind suction generates an upward pulling force, the upper connecting plate 2 and the lower connecting plate 1 tend to separate, and the limiting plate unit responds immediately: the limiting magnet 10 embedded in the upper connecting plate 2 and the lower connecting plate 1 instantly attracts the connecting plate 11, forming a reliable magnetic-mechanical composite lock, which directly transmits the upward pulling force to the anchoring system, ensuring that the upper connecting plate 2 and the lower connecting plate 1 do not separate, so that the rubber gasket in the support 5 is always under pressure, and the support 5 as a whole remains stable.

[0045] This utility model discloses a method for using a seismic isolation bearing:

[0046] First, mark the center crosshair of the bearing 5 on the top surface of the lower connecting component, i.e., the lower concrete foundation or pier. Then, compare the pre-embedded anchor bolts with the first and second connecting holes 12 of the lower connecting plate 1 one by one to ensure that the hole position error does not exceed two millimeters. After confirming that there is no error, use a lifting sling to support the four corner lugs of the lower connecting plate 1 and lift the seismic isolation bearing horizontally above the installation position. Lower it slowly, with the bolts passing through the first and second connecting holes 12. When the bottom surface of the seismic isolation bearing is about five centimeters away from the top of the foundation, manually fine-tune it to align with the center line, and then continue to lower it into place. After the seismic isolation bearing is fully seated, immediately screw in the nut but do not tighten it. Then, use a precision level to check the levelness of the top surface of the lower connecting plate 1. If the local height difference exceeds one millimeter, a thin steel sheet can be placed under the lower connecting plate 1 to level it. After leveling, tighten the nuts symmetrically, applying torque in two stages—first to 50% of the design value, and then to 100%. To prevent the seismic isolation bearing from sliding horizontally in subsequent processes, insert temporary limiting wedges around the upper connecting plate 2. Once the upper connecting component, i.e., the upper steel beam or column base plate, is in place, align the bolt holes with the first and second connecting holes 12 of the upper connecting plate 2, and insert the bolts. Tighten them in two stages to the designed torque, and then remove the wedges. Finally, use a total station to re-measure the center coordinates and elevation of the support, ensuring that the deviation is controlled within three millimeters, thus completing the installation.

[0047] In summary, the seismic isolation bearing structure of this utility model is simple, improves the vertical tensile bearing capacity without increasing the horizontal stiffness, and has zero residual displacement after an earthquake. It integrates horizontal seismic isolation and vertical tensile strength to achieve the goal of high reliability and long service life.

[0048] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

Claims

1. A seismic isolation bearing, characterized in that: Includes a support (5), a lower connecting plate (1) and an upper connecting plate (2) respectively set at the upper and lower ends of the support (5), a limit plate unit is provided on the outer surface of the support (5), and is fixedly connected to the lower connecting plate (1) and the upper connecting plate (2) by a connector (8), a limit magnet (10) and a connecting plate (11) are provided in the limit plate unit, and the connecting plate (11) is set between two adjacent limit magnets (10) and fixedly connected to the support (5).

2. The seismic isolation bearing according to claim 1, characterized in that: The limiting plate unit includes a lower vertical limiting plate (3) and an upper vertical limiting plate (4), and the cross-sections of the lower vertical limiting plate (3) and the upper vertical limiting plate (4) are both U-shaped.

3. The seismic isolation bearing according to claim 2, characterized in that: The lower end of the lower vertical limiting plate (3) is fixedly connected to the lower connecting plate (1), the upper end of the upper vertical limiting plate (4) is fixedly connected to the upper connecting plate (2), and the upper end of the lower vertical limiting plate (3) and the lower end of the upper vertical limiting plate (4) are provided with positioning grooves, and the limiting magnet (10) is fixedly installed in the positioning groove.

4. The seismic isolation bearing according to claim 3, characterized in that: The support (5) is composed of alternating rubber pads and steel plates in a vertical direction.

5. The seismic isolation bearing according to claim 2, characterized in that: The connecting plate (11) is disposed between the lower vertical limiting plate (3) and the upper vertical limiting plate (4) and is fixedly connected to the support (5).

6. The seismic isolation bearing according to claim 5, characterized in that: The inner surface of the support (5) is provided with a lead core column (6) and the outer surface is provided with a protective sleeve (7). The lead core column (6) and the protective sleeve (7) are fixedly connected to the lower connecting plate (1) and the upper connecting plate (2).

7. The seismic isolation bearing according to claim 6, characterized in that: The lower connecting plate (1) and the upper connecting plate (2) are provided with a first connecting hole and a second connecting hole (12) from the inside out.

8. The seismic isolation bearing according to claim 7, characterized in that: The first connection hole is used for detachable connection with the lower connection plate (1) and the upper connection plate (2) via a connector (8).

9. The seismic isolation bearing according to claim 7, characterized in that: The second connection hole (12) is used for detachable connection with the upper connection component or the lower connection component via the connector (8).

10. The seismic isolation bearing according to claim 9, characterized in that: The connector (8) is a bolt.

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