CN209941480U - Seismic isolation and reduction support and seismic isolation and reduction system - Google Patents

Abstract

An earthquake reduction and isolation support and an earthquake reduction and isolation system relate to the technical field of bridge construction. The seismic isolation and reduction support comprises a first support plate and a second support plate, the end surface of the first support plate close to the second support plate and the end surface of the second support plate close to the first support plate are both spherical cambered surfaces, and a first spherical crown lining plate and a second spherical crown lining plate are arranged between the spherical cambered surfaces of the first support plate and the second support plate; the first spherical cap lining plate comprises a first end surface matched with the spherical cambered surface of the first support plate and a second end surface opposite to the first end surface and provided with a limiting groove; the second spherical crown lining plate comprises a fourth end surface matched with the spherical cambered surface of the second support plate and a third end surface which is opposite to the fourth end surface and is provided with a limiting boss matched with the limiting groove; first terminal surface is equipped with first antifriction plate, and spacing boss is equipped with the second antifriction plate, and fourth terminal surface is equipped with the third antifriction plate. The seismic isolation and reduction system comprises the seismic isolation and reduction support. The rotation moment of the seismic isolation bearing can be reduced.

Description

Seismic isolation and reduction support and seismic isolation and reduction system

Technical Field

The utility model relates to a bridge building technical field particularly, relates to an subtract isolation bearing and subtract shock insulation system.

Background

The girder falling of the bridge superstructure in the event of an earthquake is one of the main causes of bridge collapse. In order to ensure the earthquake safety of the bridge superstructure, arranging a seismic isolation support between the bridge superstructure and the substructure is the simplest, direct and economic measure.

At present, a common seismic mitigation and isolation support is generally a hyperboloid support, and as shown in fig. 1, since the common seismic mitigation and isolation support has the advantages of simple structure, large bearing capacity, good durability and the like compared with a rubber seismic mitigation and isolation support, the common seismic mitigation and isolation support has been increasingly applied to a hyperboloid seismic mitigation and isolation design of a bridge since being developed, and particularly has been widely applied to some bridges with larger spans. However, as the sliding surface and the rotating surface are in the same plane, the torque normally reaches more than twice of that of the spherical steel support under normal conditions, the additional stress of the bridge is increased, the local shear stress is possibly too large, even the risk of concrete cracking is possibly caused, and the service life of the bridge under normal conditions is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an subtract isolation bearing, it can reduce the turning moment who subtracts isolation bearing to make the roof beam body can keep good atress under the normal condition.

The embodiment of the utility model is realized like this:

the embodiment of the utility model provides an aspect of the isolation bearing that subtracts, should subtract isolation bearing includes first support plate and the second support plate of range upon range of setting, the terminal surface that the first support plate is close to the second support plate and the terminal surface that the second support plate is close to the first support plate are the globular cambered surface respectively, form the accommodation space between the globular cambered surface of first support plate and second support plate; the first spherical cap lining plate and the second spherical cap lining plate are arranged in the accommodating space, the first spherical cap lining plate comprises a first end surface matched with the spherical cambered surface of the first support plate and a second end surface opposite to the first end surface, and a limiting groove is concavely arranged on the second end surface; the second spherical crown lining plate comprises a fourth end surface matched with the spherical cambered surface of the second support plate and a third end surface opposite to the fourth end surface, and a limiting boss matched with the limiting groove is arranged on the third end surface in a protruding mode; the first end face is provided with a first wear-resisting plate, the spherical cambered surface of the first support plate is provided with a first stainless steel plate, the limiting boss is close to the end face of the bottom of the limiting groove, the second wear-resisting plate is arranged at the bottom of the limiting groove, a third wear-resisting plate is arranged at the fourth end face, and the spherical cambered surface of the second support plate is provided with a third stainless steel plate. The shock absorption and isolation support can reduce the rotating moment of the shock absorption and isolation support, so that the beam body can keep good stress under normal conditions.

In the preferred embodiment of the present invention, the limiting groove is a circular groove, the limiting boss is a columnar boss, and the bottom surface of the limiting groove and the top surface of the limiting boss are mutually matched arc surfaces.

In a preferred embodiment of the present invention, the limiting groove is in clearance fit with the limiting boss.

In a preferred embodiment of the present invention, the height of the limiting boss is greater than the depth of the limiting groove.

In the preferred embodiment of the present invention, the outer wall surface of the limiting boss is provided with a fourth wear-resistant plate, and the inner wall surface of the limiting groove is provided with a fourth stainless steel plate.

In the preferred embodiment of the present invention, the contact surface between the second wear plate and the bottom of the limiting groove, and the contact surface between the fourth wear plate and the inner wall surface of the limiting groove are both provided with a lubricating layer.

In the preferred embodiment of the present invention, the seismic isolation bearing further comprises a plurality of limit stops disposed at the periphery of the second bearing plate.

In the preferred embodiment of the present invention, the number of the limit stoppers is 2 or 4.

In a preferred embodiment of the present invention, the first support plate is close to the end surface of the second support plate and the second support plate is close to the end surface of the first support plate, the first end surface and the fourth end surface are both convex spherical surfaces.

The embodiment of the utility model provides an on the other hand provides an subtract shock insulation system, should subtract shock insulation system and include foretell subtract shock insulation support. The vibration reduction and isolation system can reduce the rotating moment of the vibration reduction and isolation support, so that the beam body can keep good stress under normal conditions.

The utility model discloses beneficial effect includes:

the shock absorption and isolation support that this embodiment provided, because under normal conditions (when not having taken place earthquake effect either), the roof beam body also can take place to rotate, the spacing boss of accessible this moment is in order to realize adapting to the roof beam body and rotate in spacing recess internal rotation, and because the terminal surface that spacing boss is close to spacing recess tank bottom is equipped with the second antifriction plate, spacing recess tank bottom is equipped with second corrosion resistant plate, so, the roof beam body can reduce the turning moment who subtracts shock absorption and isolation support at the pivoted in-process, thereby make the roof beam body can keep good atress under normal conditions. When the earthquake takes place, subtract isolation bearing and realize relative displacement's change under the vice effect of friction that antifriction plate and corrosion resistant plate between first saddle board and the first spherical crown welt, first spherical crown welt and second spherical crown welt, second spherical crown welt and the second saddle board are constituteed, can consume partial seismic energy through frictional resistance, and prolonged the period of shaking certainly of structure again, thereby effectively reduced the power amplification effect that the earthquake arouses, reached and prevented pier basis and the destroyed purpose of roof beam body structure. The displacement of the seismic isolation bearing is changed due to the earthquake action, and the seismic isolation bearing returns to the initial position due to the gravity action due to the spherical design of the matching surfaces among the components. Meanwhile, the friction coefficient of the wear-resistant plate can be adjusted by adjusting the surface pressure of the wear-resistant plate, so that the energy consumption is adjustable. Therefore, the seismic isolation bearing can play a role in shock absorption when an earthquake occurs, and can reduce the rotating moment of the seismic isolation bearing under the normal condition, so that the beam body can keep good stress under the normal condition.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a seismic mitigation and isolation bearing provided in the prior art;

FIG. 2 is a schematic structural view of a seismic isolation bearing provided by an embodiment of the present invention;

fig. 3 is a schematic structural view of the first spherical cap liner plate and the second spherical cap liner plate in fig. 2.

Icon: 100-seismic isolation and reduction support; 10-a first support plate; 20-a second seat plate; 30-a first spherical cap liner plate; 31-a first end face; 32-a second end face; 321-a limit groove; h₁-the depth of the stop groove; 3211-inner wall surface of the limit groove; 40-a second spherical cap liner plate; 41-a third end face; 411-a limit boss; h₂-the height of the stop boss; 4111-the outer wall surface of a limit boss; 42-a fourth end face; 50-a first wear plate; 60-a second wear plate; 70-a third wear plate; 80-a fourth wear plate; 90-limit stop.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 2 and fig. 3, the present embodiment provides an earthquake damping support 100.

The seismic isolation and reduction support 100 comprises a first support plate 10 and a second support plate 20 which are arranged in a stacked mode, wherein the end face, close to the second support plate 20, of the first support plate 10 and the end face, close to the first support plate 10, of the second support plate 20 are respectively spherical cambered surfaces, and an accommodating space is formed between the spherical cambered surfaces of the first support plate 10 and the second support plate 20; the first spherical cap liner plate 30 and the second spherical cap liner plate 40 are arranged in the accommodating space, the first spherical cap liner plate 30 comprises a first end surface 31 matched with the spherical cambered surface of the first support plate 10 and a second end surface 32 opposite to the first end surface 31, and a limiting groove 321 is concavely arranged on the second end surface 32; the second spherical cap liner plate 40 comprises a fourth end surface 42 matched with the spherical cambered surface of the second support plate 20 and a third end surface 41 opposite to the fourth end surface 42, and a limiting boss 411 matched with the limiting groove 321 is convexly arranged on the third end surface 41. First terminal surface 31 is equipped with first antifriction plate 50, and the globular cambered surface of first bedplate 10 is equipped with first corrosion resistant plate, and the terminal surface that spacing boss 411 is close to spacing recess 321 tank bottom is equipped with second antifriction plate 60, and spacing recess 321 tank bottom is equipped with second corrosion resistant plate, and fourth terminal surface 42 is equipped with third antifriction plate 70, and the globular cambered surface of second bedplate 20 is equipped with third corrosion resistant plate.

It should be noted that, in the first embodiment, the seismic isolation and reduction support 100 is disposed between the beam and the pier foundation, and can isolate the seismic energy from being transmitted to the beam, thereby reducing the damage of the earthquake to a certain extent. It should be understood that the seismic isolation bearing 100 includes, but is not limited to, those suitable for use in the field of bridge construction, and those skilled in the art can make appropriate adjustments to adapt the seismic isolation bearing 100 to various buildings according to actual conditions.

Secondly, the plane projection of the whole seismic isolation bearing 100 can be rectangular, circular or oval, etc., and in order to facilitate the installation and fixation of the seismic isolation bearing 100, in this embodiment, the top surface of the first bearing plate 10 is in a plane arrangement, and the bottom surface of the second bearing plate 20 is in a plane arrangement. Here, the positional relationship between the first support plate 10 and the second support plate 20 is referred to the orientation shown in fig. 2, and it should be understood that the positions of the first support plate 10 and the second support plate 20 may be exchanged, and the arrangement position of the plane after exchanging the positions is obvious to those skilled in the art, and will not be described herein.

Thirdly, the first support plate 10 and the second support plate 20 are arranged to realize double horizontal displacement when an earthquake occurs, so that the shock resistance of the seismic isolation bearing 100 is effectively improved. And the bottom surface of the first support plate 10 is set to be a spherical surface, so that the first spherical crown lining plate 30 and the second spherical crown lining plate 40 can meet the displacement requirement of the friction pendulum type support relative to the first support plate 10 and the second support plate 20.

Fourth, in order to facilitate the engagement of the first end surface 31 with the bottom surface of the first seat plate 10, the radius of curvature of the first end surface 31 should be adapted to the radius of curvature of the bottom surface of the first seat plate 10. Meanwhile, in order to facilitate the fourth end surface 42 to be matched with the top surface of the second seat plate 20, the radius of curvature of the fourth end surface 42 should be matched with the top surface of the second seat plate 20, and the specific radius of curvature should be selected reasonably by those skilled in the art according to actual situations.

Fifth, in the present embodiment, the limiting groove 321 is concavely disposed on the second end surface 32, the limiting protrusion is convexly disposed on the third end surface 41, and the limiting protrusion can relatively rotate in the limiting groove 321. In other embodiments, the limiting groove 321 can be concavely disposed on the third end surface 41, and the limiting protrusion can be convexly disposed on the second end surface 32.

Sixthly, the seismic isolation and reduction support 100 slides relatively under the action of an earthquake, so that the natural vibration period of the structure is prolonged, and the effect of shock absorption is achieved. However, the seismic isolation bearing 100 is arranged between a beam body and a pier, and the seismic isolation bearing 100 is easily worn after being used for a long time due to the fact that the seismic isolation bearing 100 is subjected to large external force, in order to prolong the service life of the seismic isolation bearing 100, a first wear-resisting plate 50 is arranged between the first end face 31 and the first bearing plate 10, a first stainless steel plate is arranged on the spherical arc face of the first bearing plate 10, a second wear-resisting plate 60 is arranged between the limiting boss 411 and the limiting groove 321, a second stainless steel plate is arranged at the bottom of the limiting groove 321, a third wear-resisting plate 70 is arranged between the fourth end face 42 and the second bearing plate 20, and a third stainless steel plate is arranged on the spherical arc face of the second bearing plate 20. In other embodiments, the first wear plate 50 may be disposed on the first end surface 31, the first stainless steel plate may be disposed on the spherical arc surface of the first seat plate 10, the second wear plate 60 may be disposed on the end surface of the limit boss 411 near the groove bottom of the limit groove 321, the second stainless steel plate may be disposed on the groove bottom of the limit groove 321, the third wear plate 70 may be disposed on the fourth end surface 42, and the third stainless steel plate may be disposed on the spherical arc surface of the second seat plate 20. Specifically, the wear plates are fixed on the end faces by bonding or countersunk bolts, and those skilled in the art can select the wear plates according to actual conditions, and the detailed description is omitted here.

In summary, the seismic isolation bearing 100 provided in this embodiment, because under normal conditions (when no earthquake occurs), the beam body also rotates, the beam body can rotate in the limiting groove 321 through the limiting boss 411, and at this time, the second wear-resisting plate 60 is disposed on the end surface of the limiting boss 411 close to the bottom of the limiting groove 321, and the bottom of the limiting groove 321 is provided with the second stainless steel plate, so that the beam body can reduce the rotating moment of the seismic isolation bearing 100 in the rotating process, and the beam body can maintain good stress under normal conditions. When an earthquake occurs, the seismic isolation bearing 100 realizes the change of relative displacement under the action of a friction pair consisting of a wear-resisting plate and a stainless steel plate between the first bearing plate 10 and the first spherical crown lining plate 30, the first spherical crown lining plate 30 and the second spherical crown lining plate 40, the wear-resisting plate between the second spherical crown lining plate 40 and the second bearing plate 20 and the stainless steel plate, partial seismic energy can be consumed through frictional resistance, the self-vibration period of the structure is prolonged, the power amplification effect caused by the earthquake is effectively reduced, and the purpose of preventing the pier foundation and the beam body structure from being damaged is achieved. The displacement of the seismic isolation bearing 100 is changed due to the earthquake, and the seismic isolation bearing returns to the initial position due to the gravity due to the spherical design of the matching surfaces among the components. Meanwhile, the friction coefficient of the wear-resistant plate can be adjusted by adjusting the surface pressure of the wear-resistant plate, so that the energy consumption is adjustable. Therefore, the seismic isolation bearing 100 can play a role in shock absorption when an earthquake occurs, and the rotating moment of the seismic isolation bearing 100 can be reduced under a normal condition, so that the beam body can keep good stress under the normal condition.

In order to facilitate the rotation of the limiting boss 411 relative to the limiting groove 321, in this embodiment, the limiting groove 321 is a circular groove, the limiting boss 411 is a columnar boss, and the bottom surface of the limiting groove 321 and the top surface of the limiting boss 411 are arc surfaces matched with each other. It should be understood that the radius of curvature of the bottom of the limiting groove 321 and the radius of curvature of the end surface of the limiting projection 411 close to the bottom of the limiting groove 321 should be matched to facilitate relative rotation.

In this embodiment, the height H of the limit boss₂Depth H larger than limiting groove₁Thus, a certain gap is formed between the first spherical cap liner plate 30 and the second spherical cap liner plate 40, and interference generated when the first spherical cap liner plate 30 and the second spherical cap liner plate 40 rotate relatively is avoided. Meanwhile, the limit groove 321 and the limit boss 411 are in clearance fit. Therefore, when the beam body needs to rotate, a certain displacement and a certain rotation angle allowance can be reserved.

Referring to fig. 3, in the embodiment, the outer wall surface 4111 of the limit boss is provided with a fourth wear-resisting plate 80, and the inner wall surface 3211 of the limit groove is provided with a fourth stainless steel plate. The first wear plate 50 and the third wear plate 70 can be made of special friction materials, so that the first wear plate 50 and the third wear plate 70 are superior in performance and high in compressive strength, the contact pressure reaches more than 60N/mm2, and the bearing capacity of the spherical crown support is guaranteed. In addition, the wear-resistant material has excellent processing performance, moderate hardness, is suitable for machining, can adapt to the processing of wear-resistant plates with different shapes and sizes, has stable weather resistance, and can be suitable for special environments such as coastal areas, severe corrosion areas and the like. The second wear plate 60 and the fourth wear plate 80 may be made of modified ultra-high molecular weight polyethylene. In the present embodiment, the first wear plate 50 and the third wear plate 70 are heat-resistant wear plates, and the coefficient of friction of the wear plates can be changed. It should be appreciated that the above listed materials are not intended to be limiting for the first and third wear plates 50, 70 or the second and fourth wear plates 60, 80, and that those skilled in the art may select other suitable materials as desired.

Under normal conditions, to reduce the rotational moment of the seismically isolating mount 100 and to reduce wear. A lubricating layer is arranged on the contact surface between the second wear plate 60 and the groove bottom of the limit groove 321, and the contact surface between the fourth wear plate 80 and the inner wall surface 3211 of the limit groove. For example, the lubricating layer may be coated with a silicone grease.

In order to guarantee that this subtract isolation bearing 100 still can guarantee the relative stability of self structure under normal conditions, subtract isolation bearing 100 still includes a plurality of stop 90 that set up in second bearing board 20 periphery, and stop 90 is connected with second bearing board 20 through the spacer pin. Thus, the seismic isolation bearing 100 can keep relatively stable under normal conditions; when the external force acts, the influence of the external force is counteracted by the self limit stop 90; when the external force exceeds the designed value, the limit pin is sheared, so that the seismic isolation and reduction support 100 can realize the seismic isolation function by depending on the structure of the support.

In this embodiment, the number of the limit stoppers 90 may be 2 or 4, and the limit stoppers 90 are respectively disposed on the outer circumference of the second seat plate 20. When the seismic isolation and reduction support 100 is set as a fixed support, 4 limit stops 90 are provided; when the seismic isolation and reduction support 100 is arranged into a one-way movable support, 2 limit stops 90 are provided, the 2 limit stops 90 can be arranged on the left side and the right side or the front side and the rear side, and only one direction can freely move; when the seismic isolation and reduction support 100 is a multidirectional movable support, the limit stop 90 does not need to be arranged, and the longitudinal and transverse directions can be freely moved at the moment.

In the present embodiment, the end surface of the first seat plate 10 close to the second seat plate 20 and the end surface of the second seat plate 20 close to the first seat plate 10 are both concave spherical surfaces, and the first end surface 31 and the fourth end surface 42 are both convex spherical surfaces. In other embodiments, the concave spherical surface and the convex spherical surface can be mutually converted, so long as the parts can be matched.

The embodiment further provides an earthquake reduction and isolation system, which includes a plurality of the earthquake reduction and isolation supports 100, and the structure and the beneficial effects of the earthquake reduction and isolation supports 100 are completely described in the foregoing, so that the detailed description is omitted here.

The above description is only an alternative embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An earthquake reduction and isolation support is characterized by comprising:

the bearing seat comprises a first bearing plate and a second bearing plate which are arranged in a stacked mode, wherein the end face, close to the second bearing plate, of the first bearing plate and the end face, close to the first bearing plate, of the second bearing plate are respectively spherical cambered surfaces, and an accommodating space is formed between the spherical cambered surfaces of the first bearing plate and the second bearing plate; the first spherical cap lining plate and the second spherical cap lining plate are arranged in the accommodating space, the first spherical cap lining plate comprises a first end surface matched with the spherical cambered surface of the first support plate and a second end surface opposite to the first end surface, and a limiting groove is concavely arranged on the second end surface; the second spherical crown lining plate comprises a fourth end surface matched with the spherical cambered surface of the second support plate and a third end surface opposite to the fourth end surface, and a limiting boss matched with the limiting groove is arranged on the third end surface in a protruding mode;

the first end face is provided with a first wear-resisting plate, the spherical cambered surface of the first support plate is provided with a first stainless steel plate, the limiting boss is close to the end face of the bottom of the limiting groove, the second wear-resisting plate is arranged at the bottom of the limiting groove, a third wear-resisting plate is arranged at the fourth end face, and the spherical cambered surface of the second support plate is provided with a third stainless steel plate.

2. The seismic mitigation and isolation bearing according to claim 1, wherein the limiting groove is a circular groove, the limiting boss is a columnar boss, and the bottom surface of the limiting groove and the top surface of the limiting boss are mutually matched cambered surfaces.

3. The seismic mitigation and isolation bearing according to claim 2, wherein said limiting groove is clearance fitted with said limiting boss.

4. The seismic mitigation and isolation bearing according to claim 3, wherein the height of said limit boss is greater than the depth of said limit groove.

5. The seismic isolation bearing of claim 2, wherein the outer wall surface of the limiting boss is provided with a fourth wear-resisting plate, and the groove wall of the limiting groove is provided with a fourth stainless steel plate.

6. The seismic mitigation and isolation bearing according to claim 5, wherein a lubricating layer is arranged on the contact surface between the second wear plate and the groove bottom of the limit groove and the contact surface between the fourth wear plate and the inner wall surface of the limit groove.

7. The seismic isolation bearing of claim 1 further comprising a plurality of limit stops disposed on the outer periphery of the second bearing plate.

8. The seismic isolation mount of claim 7, wherein the number of limit stops is 2 or 4.

9. The seismic mitigation and isolation bearing according to claim 1, wherein the end surface of the first bearing plate close to the second bearing plate and the end surface of the second bearing plate close to the first bearing plate are both concave spherical surfaces, and the first end surface and the fourth end surface are both convex spherical surfaces.

10. An earthquake relief system comprising the earthquake relief support as set forth in any one of claims 1 to 9.

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