A three-dimensional seismic isolation device

Abstract

The present invention relates to the technical field of seismic isolation of engineering structures, and in particular to a three-dimensional seismic isolation device. It comprises a corresponding top plate and bottom plate, a disc spring damping device and a U-shaped damper are arranged between the top plate and the bottom plate, the top of the disc spring damping device is fixedly connected to the top plate, the bottom plate is provided with a groove corresponding to the disc spring damping device, the bottom of the disc spring damping device can slide along the groove, the U-shaped damper is located around the disc spring damping device, the bottom of the U-shaped damper is fixedly connected to the bottom plate, and a gap is arranged between the top of the U-shaped damper and the top plate. The present invention combines the disc spring damping device with the U-shaped damper, has excellent seismic isolation performance, and can effectively cope with vertical and horizontal earthquakes.

Description

Technical Field

[0001] The invention relates to the technical field of engineering structure seismic isolation, and in particular to a three-dimensional seismic isolation device. Background Art

[0002] Earthquakes are multi-dimensional, sudden and destructive natural disasters. Several earthquake damage phenomena and post-earthquake investigations at home and abroad have shown that for traditional horizontal base isolation systems, non-structural components and precision instruments in buildings will be damaged to varying degrees due to the existence of vertical ground acceleration. The horizontal isolation structure system reduces the seismic response of the structure by extending the natural vibration period and structural damping of the superstructure, ensuring that the superstructure can remain in an elastic state or remain in the initial state of elastic-plastic deformation during a large earthquake. However, the impact and harm of vertical earthquakes on structures cannot be ignored, and the horizontal isolation system still has corresponding defects and hidden dangers.

[0003] The current three-dimensional seismic isolation devices have certain shortcomings. The three-dimensional seismic isolation devices with good deformation energy dissipation capacity also have small bearing capacity, which makes it difficult to carry precision instruments with large deadweight; the three-dimensional seismic isolation devices with great vertical bearing capacity also have small hysteresis energy dissipation, which reduces the shock absorption effect. Therefore, there is a need for a three-dimensional seismic isolation device with both horizontal and vertical seismic isolation performance, so as to reduce the damage of earthquakes to non-structural components and precision instruments. Summary of the invention

[0004] The object of the present invention is to provide a three-dimensional seismic isolation device, which has a large bearing capacity, a high vertical energy dissipation capacity, can provide a certain amount of friction energy dissipation in the horizontal direction, has a simple structure, and is easy to install and maintain.

[0005] The present invention provides a three-dimensional seismic isolation device, comprising a top plate and a bottom plate corresponding to each other, a disc spring shock absorbing device and a U-shaped damper are arranged between the top plate and the bottom plate, the top of the disc spring shock absorbing device is fixedly connected to the top plate, the bottom plate is provided with a groove corresponding to the disc spring shock absorbing device, the bottom of the disc spring shock absorbing device can slide along the groove, the U-shaped damper is located around the disc spring shock absorbing device, the bottom of the U-shaped damper is fixedly connected to the bottom plate, and a gap is arranged between the top of the U-shaped damper and the top plate.

[0006] Preferably, the bottom surface of the groove is a curved surface, and a polytetrafluoroethylene coating is provided on the curved surface.

[0007] Preferably, the disc spring shock absorbing device includes a lower support, the bottom of the lower support is consistent with the shape of the bottom surface of the groove, the lower support is provided with a guide column, the guide column is sleeved with a disc spring, the top of the guide column is connected to the upper support, and the upper support is fixedly connected to the top plate.

[0008] Preferably, the top of the U-shaped damper is movably connected to the top plate, and through holes are provided on the top of the U-shaped damper and the top plate, bolts pass through the through holes, nuts are provided at both ends of the bolts, the top of the U-shaped damper and the top plate are located between the two nuts, and the inner diameter of the through hole is larger than the outer diameter of the bolt.

[0009] Preferably, four U-shaped dampers are provided, and the U-shaped dampers are evenly and symmetrically distributed around the disc spring shock absorbing device.

[0010] Preferably, the U-shaped dampers are provided in four groups, each group includes two U-shaped dampers arranged in parallel, and the four groups of U-shaped dampers are evenly and symmetrically distributed around the disc spring shock absorbing device.

[0011] Preferably, twelve U-shaped dampers are provided, and the U-shaped dampers are evenly and symmetrically distributed around the disc spring shock absorbing device.

[0012] Preferably, the disc spring shock absorbing devices are provided in multiple groups, and the multiple groups of the disc spring shock absorbing devices are symmetrically distributed around the center of the base plate.

[0013] Preferably, the height of the gap is less than or equal to the ratio of the design weight borne by the top plate to the stiffness of the disc spring.

[0014] Preferably, the U-shaped damper is a metal damper, and the material of the U-shaped damper is Q235b steel.

[0015] Beneficial effects:

[0016] The present invention combines the disc spring damping device with the U-shaped damper, and has excellent seismic isolation performance. Under the action of vertical earthquake, the disc spring damping device exerts its high vertical bearing capacity and certain friction energy dissipation capacity, while the U-shaped damper exerts certain vertical bearing capacity and high vertical energy dissipation capacity; under the action of horizontal earthquake, the lower support of the disc spring damping device slides in the groove of the bottom plate, providing certain friction energy dissipation capacity, while the U-shaped damper fully exerts its horizontal energy dissipation capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0019] Figure 2 It is a cross-sectional schematic diagram of the initial state of Example 1 of the present invention;

[0020] Figure 3 It is a cross-sectional schematic diagram of the working state of embodiment 1 of the present invention;

[0021] Figure 4 This is a top view of the embodiment 1 of the present invention in which the top plate, the limiting plate and the upper support are omitted;

[0022] Figure 5 This is a top view of Embodiment 2 of the present invention in which the top plate, the limiting plate and the upper support are omitted;

[0023] Figure 6 This is a top view of Embodiment 3 of the present invention in which the top plate, the limiting plate and the upper support are omitted;

[0024] Figure 7 This is a top view of Embodiment 4 of the present invention in which the top plate, the limiting plate and the upper support are omitted;

[0025] Description of reference numerals:

[0026] 1-top plate, 2-bottom plate, 3-limiting plate, 4-U-type damper, 5-groove, 6-lower support, 7-disc spring, 8-upper support, 9-gap, 10-through hole, 11-guide column, 12-bolt, 13-nut, 14-limiting groove. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] 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 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 operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example 1

[0031] like Figure 1-Figure 4 As shown, a three-dimensional seismic isolation device includes a top plate 1 and a bottom plate 2 corresponding to each other, a disc spring shock absorbing device and a U-shaped damper 4 are arranged between the top plate 1 and the bottom plate 2, the top of the disc spring shock absorbing device is fixedly connected to the top plate 1, and the bottom plate 2 is provided with a groove 5 corresponding to the disc spring shock absorbing device, and the bottom of the disc spring shock absorbing device can slide along the bottom of the groove 5, and the bottom surface of the groove 5 is a curved surface, and a polytetrafluoroethylene material coating is arranged on the curved surface.

[0032] The disc spring shock absorbing device includes a lower support 6, the bottom of the lower support 6 is consistent with the shape of the bottom surface of the groove 5, the bottom surface of the groove 5 is larger than the bottom surface of the lower support 6, and the lower support 6 can slide in the groove 5 of the bottom plate 2, which can solve the influence of lateral displacement and torsion on the disc spring 7 and release the horizontal stiffness of the disc spring 7. A guide column 11 is provided on the lower support 6, and the disc spring 7 is sleeved on the guide column 11. The top of the guide column 11 is connected to the upper support 8, and the upper support 8 is fixedly connected to the top plate 1. A limiting groove 14 matching with the guide column 11 is provided at the bottom of the upper support 8 to prevent the guide column 11 from sliding between the upper support 8 and the lower support 6, changing the force direction of the disc spring, and affecting the seismic isolation effect. The cross-sectional size and material strength of the disc spring 7 are based on the "Disc Spring" (GB / T 1972-2005), and Q345 steel can be used.

[0033] The U-shaped damper 4 is located around the disc spring damping device, the bottom of the U-shaped damper 4 is fixedly connected to the bottom plate 2, and a gap 9 is provided between the top of the U-shaped damper 4 and the top plate 1. When the gap 9 exists, the vertical bearing capacity is borne by the disc spring damping device, and the height of the gap 9 is less than or equal to the ratio of the design weight borne by the top plate 1 to the stiffness of the disc spring 7. Preferably, the height of the gap 9 is equal to the ratio of the design weight borne by the top plate 1 to the stiffness of the disc spring 7.

[0034] The U-shaped damper 4 is a metal damper, and the material of the U-shaped damper 4 is Q235b steel.

[0035] The top of the U-shaped damper 4 is movably connected to the top plate 1. A through hole 10 is provided on the top of the U-shaped damper 4 and the top plate 1. Bolts 12 penetrate the through holes 10 on the top of the U-shaped damper 4 and the top plate 1. Nuts 13 are provided at both ends of the bolts 12. The top of the U-shaped damper 4 and the top plate 1 are located between the two nuts 13. The inner diameter of the through hole 10 is larger than the outer diameter of the bolt 12. When a long-term surface pressure load is applied to the top plate 1, the top plate 1 moves downward, and the gap 9 between the top plate 1 and the U-shaped damper 4 is reduced until the top plate 1 presses the U-shaped damper 4. The nut 13 on one side of the U-shaped damper 4 can be tightened. At this time, the U-shaped damper 4 and the disc spring shock-absorbing device simultaneously bear the vertical earthquake reciprocating load, effectively increasing the vertical energy consumption.

[0036] A limit plate 3 is provided between the U-shaped damper 4 and the top plate 1, and a bolt 12 passes through the U-shaped damper 4, the limit plate 3 and the top plate 1 in sequence. The limit plate 3 can increase the horizontal stability of the U-shaped damper 4. At this time, the gap 9 is located between the top plate 1 and the limit plate 3.

[0037] Four U-shaped dampers 4 are provided, and the U-shaped dampers 4 are evenly and symmetrically distributed around the disc spring shock absorbing device.

[0038] Working process:

[0039] During installation, the disc spring 7 is first sleeved on the guide column 11 in sequence, and then the upper support 8 is placed on the guide column 11, and the guide column 11 is inserted into the limit groove 14 at the bottom of the upper support 8, and the disc spring shock absorbing device is assembled. The assembled disc spring shock absorbing device is placed on the bottom plate 2, and the bottom of the lower support 6 is in surface contact with the bottom surface of the groove 5 of the bottom plate 2.

[0040] The U-shaped damper 4 is placed on the bottom plate 2 , and the U-shaped damper 4 is connected to the bottom plate 2 by bolts; the limiting plate 3 and the top plate 1 are placed on the U-shaped damper 4 in sequence.

[0041] The upper support 8 is connected to the top plate 1 by bolts, and bolts 12 are used to penetrate the U-shaped damper 4, the limit plate 3 and the top plate 1 in sequence, and nuts 13 are set at both ends of the bolts 12 to ensure the gap 9 between the U-shaped damper 4 and the limit plate 3, and the assembly is completed.

[0042] Under the action of vertical earthquake, the disc spring shock-absorbing device exerts its high vertical bearing capacity and certain friction energy dissipation capacity. When a long-term surface pressure load is applied above the top plate 1, the top plate 1 moves downward, and the gap 9 between the top plate 1 and the U-shaped damper 4 is reduced until the top plate 1 presses the U-shaped damper 4. The nut 13 on one side of the U-shaped damper 4 can be tightened. At this time, the U-shaped damper 4 and the disc spring shock-absorbing device simultaneously bear the vertical reciprocating earthquake load, effectively increasing the vertical energy dissipation.

[0043] Under the action of horizontal earthquake, the lower support 6 slides in the groove 5 of the base plate 2, providing a certain friction energy absorption capacity and releasing the horizontal stiffness of the disc spring; at the same time, the U-shaped damper 4 fully exerts its horizontal energy absorption capacity; the curved surface arranged between the base plate 2 and the lower base can effectively solve the influence of lateral displacement and torsion on the disc spring 7; the disc spring shock absorbing device and the U-shaped damper 4 are both made of metal materials, which protects the environment, is more convenient to prefabricate, and is easy to install and replace.

[0044] Example 2

[0045] like Figure 5 As shown, a three-dimensional seismic isolation device is basically the same as Example 1, with the only difference being that four groups of U-shaped dampers 4 are provided, each group including two U-shaped dampers 4 arranged in parallel, and the four groups of U-shaped dampers 4 are evenly and symmetrically distributed around the disc spring shock absorbing device, which can improve the horizontal bearing capacity of the present invention.

[0046] Example 3

[0047] like Figure 6 As shown, a three-dimensional seismic isolation device is basically the same as Example 1, with the only difference being that twelve U-shaped dampers 4 are provided, and the U-shaped dampers 4 are evenly and symmetrically distributed around the disc spring shock absorbing device, which can improve the horizontal bearing capacity of the present invention.

[0048] Example 4

[0049] like Figure 7 As shown, a three-dimensional seismic isolation device is basically the same as Example 1, with the only difference being that multiple groups of disc spring shock-absorbing devices are provided, and the multiple groups of disc spring shock-absorbing devices are symmetrically distributed around the center of the base plate 2, which is suitable for use requiring a greater vertical bearing capacity.

[0050] The working process of Examples 2-4 is the same as that of Example 1.

[0051] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by 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. A three-dimensional seismic isolation device, characterized in that: It comprises a top plate and a bottom plate corresponding to each other, a disc spring damping device and a U-shaped damper are arranged between the top plate and the bottom plate, the top of the disc spring damping device is fixedly connected to the top plate, the bottom plate is provided with a groove corresponding to the disc spring damping device, the bottom surface of the groove is a curved surface, a polytetrafluoroethylene coating is arranged on the curved surface, the bottom of the disc spring damping device can slide along the groove, the disc spring damping device comprises a lower support, the bottom of the lower support is consistent with the shape of the bottom surface of the groove, a guide column is arranged on the lower support, a disc spring is sleeved on the guide column, the top of the guide column is connected to the upper support, and the upper support is fixedly connected to the top plate, The U-shaped damper is located around the disc spring shock absorbing device, the bottom of the U-shaped damper is fixedly connected to the bottom plate, a gap is provided between the top of the U-shaped damper and the top plate, the top of the U-shaped damper and the top plate are movably connected, the top of the U-shaped damper and the top plate are both provided with through holes, bolts pass through the through holes, nuts are provided at both ends of the bolts, the top of the U-shaped damper and the top plate are both located between two nuts, and the inner diameter of the through hole is larger than the outer diameter of the bolt.

2. The three-dimensional seismic isolation device according to claim 1, characterized in that: There are four U-shaped dampers, and the U-shaped dampers are evenly and symmetrically distributed around the disc spring shock absorbing device.

3. The three-dimensional seismic isolation device according to claim 1, characterized in that: The U-shaped dampers are provided in four groups, each group includes two U-shaped dampers arranged in parallel, and the four groups of U-shaped dampers are evenly and symmetrically distributed around the disc spring shock absorbing device.

4. The three-dimensional seismic isolation device according to claim 1, characterized in that: Twelve U-shaped dampers are provided, and the U-shaped dampers are evenly and symmetrically distributed around the disc spring shock absorbing device.

5. The three-dimensional seismic isolation device according to claim 1, characterized in that: The disc spring shock absorbing devices are arranged in multiple groups, and the multiple groups of the disc spring shock absorbing devices are symmetrically distributed around the center of the base plate.

6. The three-dimensional seismic isolation device according to claim 1, characterized in that: The height of the gap is less than or equal to the ratio of the design weight borne by the top plate to the stiffness of the disc spring.

7. The three-dimensional seismic isolation device according to claim 1, characterized in that: The U-shaped damper is a metal damper, and the material of the U-shaped damper is Q235b steel.

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