CN221760444U - A seismic isolation bearing for civil engineering bridge - Google Patents

Abstract

The utility model discloses a seismic isolation bearing for a civil engineering bridge, which belongs to the technical field of civil engineering. The key points of its technical solution include an upper steel plate, a seismic isolation component is fixedly connected to the middle of the bottom of the upper steel plate, a lower steel plate is fixedly connected to the bottom of the seismic isolation component, a mounting block is arranged at the bottom of the lower steel plate, and a support component is arranged inside the lower steel plate. By arranging the seismic isolation component, when the upper steel plate is subjected to vertical seismic force, the internal rubber plate acts as an elastic body, so that most of the seismic force can be absorbed, and by arranging the lead core column, the seismic isolation component has a certain lateral stiffness when in use, thereby improving the durability of the seismic isolation component, and by arranging the support component, when the upper steel plate moves downward, it will drive the rotating rod and the two moving blocks to move toward each other, and the extrusion force of the moving block when moving and the pulling force of the tension spring will form an offset, so that the seismic force received by the upper steel plate can be further buffered and shock-absorbed, thereby improving the seismic isolation effect.

Description

A seismic isolation bearing for civil engineering bridge

Technical Field

The utility model relates to the technical field of civil engineering, in particular to a seismic isolation support for a civil engineering bridge.

Background Art

Seismic isolation bearings refer to supporting devices that are installed in structures to meet seismic isolation requirements. Seismic isolation layers are added between the superstructure and the foundation, and rubber seismic isolation bearings are installed to provide a soft connection to the ground. Through this technology, about 80% of the energy of an earthquake can be offset. It is a structural member with low horizontal stiffness and high vertical stiffness. It can withstand large horizontal deformations and can be used as part of the load-bearing system. Seismic isolation bearings are required when building bridges.

At present, a Chinese utility model with publication number CN217925158U discloses a seismic isolation bearing for buildings, including a seismic isolation support mechanism, which includes a lower pier seat, a connecting plate, a steel mesh, anchor bars and a cap; a rectangular hole is provided on the top inner wall of the lower pier seat, a positioning embedded plate is slidably connected in the rectangular hole, and a center hole is provided on the top of the positioning embedded plate. The utility model is fixedly connected to the positioning embedded plate by arranged dowel bars, fixedly connected to the corresponding dowel bars by arranged vertical bars, and two vertical bars are connected together by cross bars. The overall stability after pouring is improved by the three annular steel rings. Concrete is poured into the lower pier seat through the center hole, and the lower pier seat is moved upward. The lower pier seat is separated from the positioning embedded plate and its interior is connected by a steel structure, which not only improves the overall stability but also has a better seismic isolation effect.

Currently, most of the seismic isolation bearings used in civil engineering bridges are lead rubber bearings. Since most of the existing lead rubber bearings lack supporting devices, the harsh external environment will accelerate the damage of the lead rubber bearings, reducing their service life, thereby reducing the seismic isolation effect of the seismic isolation bearings. In addition, most of the existing seismic isolation bearings can only isolate vertical seismic forces, but cannot isolate horizontal seismic forces, which in turn affects the stability of the bridge during use.

Utility Model Content

The utility model provides a seismic isolation bearing for civil engineering bridges, aiming to solve the problem that most of the existing lead rubber bearings lack a supporting device, so that the harsh external environment will accelerate the damage of the lead rubber bearing, so that its service life is reduced, thereby reducing the seismic isolation effect of the seismic isolation bearing, and most of the existing seismic isolation bearings can isolate vertical seismic forces but cannot isolate horizontal seismic forces, thereby affecting the stability of bridge use.

The utility model is implemented as follows: a seismic isolation bearing for a civil engineering bridge comprises an upper steel plate, a seismic isolation assembly is fixedly connected to the middle of the bottom of the upper steel plate, a lower steel plate is fixedly connected to the bottom of the seismic isolation assembly, a mounting block is arranged at the bottom of the lower steel plate, a supporting assembly is arranged inside the lower steel plate, a connecting block is fixedly connected to the bottom of the lower steel plate, and movable rods are fixedly connected to both sides of the connecting block;

The seismic isolation assembly includes an upper sealing plate, a lower sealing plate, a lead core column, an internal rubber plate and an internal steel plate. The top of the upper sealing plate is fixedly connected to the bottom of the upper steel plate, the bottom of the lower sealing plate is fixedly connected to the top of the lower steel plate, the lead core column is fixedly connected between the opposite sides of the upper sealing plate and the lower sealing plate, the internal rubber plate and the internal steel plate are both fixedly connected to the surface of the lead core column, and the internal rubber plate and the internal steel plate are staggered.

In order to achieve the effect of enhancing the durability of the seismic isolation assembly, as a preferred embodiment of the seismic isolation bearing for a civil engineering bridge of the utility model, the surfaces of the internal rubber plate and the internal steel plate are both provided with a protective layer of rubber.

In order to further improve the seismic isolation effect of the seismic isolation assembly, as a preferred seismic isolation bearing for a civil engineering bridge of the utility model, the support assembly includes a rotating rod, a U-shaped frame, a moving block and a tension spring, the bottom end of the rotating rod is rotatably connected to the bottom of the upper steel plate, the bottom end of the rotating rod is rotatably connected to the inside of the U-shaped frame, the moving block is fixedly connected to the bottom of the U-shaped frame, and the tension spring is fixedly connected to the side away from each other of the two moving blocks.

In order to achieve the effect of supporting the supporting assembly, as a preferred seismic isolation bearing for a civil engineering bridge of the utility model, a limiting groove is opened on the top of the lower steel plate, and the side of the tension spring close to the inner wall of the limiting groove is fixedly connected to the inner wall of the limiting groove.

In order to achieve the effect of limiting the moving route of the moving block, as a preferred seismic isolation bearing for a civil engineering bridge of the utility model, a sliding rod is fixedly connected to the inside of the limiting groove, the moving block is slidably connected to the surface of the sliding rod, and the bottom of the U-shaped frame is slidably connected to the top of the lower steel plate.

In order to achieve the effect of shock absorbing the horizontal seismic force exerted on the upper steel plate, as a preferred seismic isolation bearing for a civil engineering bridge of the utility model, a groove is provided on the top of the mounting block, and placement grooves are provided on both sides of the groove. A damping rod is fixedly connected to the inside of the placement groove, and baffles are fixedly connected to the opposite sides of the two damping rods, and the baffles are used in conjunction with the movable rod. A shock-absorbing spring is sleeved on the surface of the damping rod, and the shock-absorbing spring is fixedly connected to the baffle and the damping rod on one side thereof.

In order to achieve the effect of increasing the friction force when the baffle moves, as a preferred seismic isolation bearing for a civil engineering bridge of the utility model, a nylon plate is fixedly connected to the inside of the placement groove, and the side of the baffle close to the nylon plate is slidably connected to it.

Compared with the prior art, the beneficial effects of the utility model are:

The seismic isolation bearing for the civil engineering bridge is provided with a seismic isolation component. When the upper steel plate is subjected to vertical seismic force, the upper steel plate will squeeze the upper sealing plate downward, and the upper sealing plate will squeeze the internal rubber plate and the internal steel plate downward in turn. Since the internal rubber plate acts as an elastic body, it can absorb most of the seismic force. By providing a lead core column, the seismic isolation component has a certain lateral stiffness when in use, thereby improving the durability of the seismic isolation component. By providing a supporting component, the upper steel plate will drive the rotating rod to rotate when it moves downward, and the two rotating rods will respectively drive the corresponding moving blocks to move toward each other when they rotate, and the squeezing force of the moving blocks when they move and the pulling force of the tension spring will form an offset, so that the seismic force on the upper steel plate can be further buffered and shock-absorbed, thereby improving the overall seismic isolation effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an overall structural diagram of a seismic isolation bearing for a civil engineering bridge of the present utility model;

FIG2 is a schematic diagram of the connection between the upper steel plate, the seismic isolation assembly and the lower steel plate in the present invention;

FIG3 is a structural cross-sectional view of the seismic isolation assembly of the utility model;

FIG4 is a schematic diagram of the structure of the support assembly of the present invention;

FIG5 is a structural sectional view of the mounting block in the utility model.

In the figure, 1. upper steel plate; 2. seismic isolation assembly; 201. upper sealing plate; 202. lower sealing plate; 203. lead core column; 204. internal rubber plate; 205. internal steel plate; 3. lower steel plate; 4. mounting block; 5. supporting assembly; 501. rotating rod; 502. U-shaped frame; 503. moving block; 504. tension spring; 6. connecting block; 7. movable rod; 8. protective layer rubber; 9. limiting groove; 10. sliding rod; 11. groove; 12. placement groove; 13. damping rod; 14. baffle; 15. shock-absorbing spring; 16. nylon plate.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

Please refer to Figures 1-5. The utility model provides a technical solution: a seismic isolation bearing for a civil engineering bridge, comprising an upper steel plate 1, a seismic isolation component 2 is fixedly connected to the middle of the bottom of the upper steel plate 1, a lower steel plate 3 is fixedly connected to the bottom of the seismic isolation component 2, a mounting block 4 is arranged at the bottom of the lower steel plate 3, a supporting component 5 is arranged inside the lower steel plate 3, a connecting block 6 is fixedly connected to the bottom of the lower steel plate 3, and movable rods 7 are fixedly connected to both sides of the connecting block 6;

The seismic isolation assembly 2 includes an upper sealing plate 201, a lower sealing plate 202, a lead core column 203, an internal rubber plate 204 and an internal steel plate 205. The top of the upper sealing plate 201 is fixedly connected to the bottom of the upper steel plate 1, the bottom of the lower sealing plate 202 is fixedly connected to the top of the lower steel plate 3, the lead core column 203 is fixedly connected between the opposite sides of the upper sealing plate 201 and the lower sealing plate 202, the internal rubber plate 204 and the internal steel plate 205 are both fixedly connected to the surface of the lead core column 203, and the internal rubber plate 204 and the internal steel plate 205 are staggered.

In this embodiment: by setting up the seismic isolation component 2, when the upper steel plate 1 is subjected to the vertical seismic force, the upper steel plate 1 will squeeze the upper sealing plate 201 downward, and the upper sealing plate 201 will squeeze the internal rubber plate 204 and the internal steel plate 205 downward in turn. Since the internal rubber plate 204 acts as an elastic body, it can absorb most of the seismic force. By setting up the lead core column 203, the seismic isolation component 2 has a certain lateral stiffness when in use, thereby improving the durability of the seismic isolation component 2. By setting up the supporting component 5, when the upper steel plate 1 moves downward, it will drive the rotating rod 501 to rotate. When the two rotating rods 501 rotate, they will respectively drive the corresponding moving blocks 503 to move toward each other. The squeezing force of the moving block 503 when moving and the pulling force of the tension spring 504 will form an offset, so that the seismic force received by the upper steel plate 1 can be further buffered and shock-absorbed, thereby improving the overall seismic isolation effect.

As a technical optimization solution of the present invention, a protective layer of rubber 8 is provided on the surfaces of the internal rubber plate 204 and the internal steel plate 205 .

In this embodiment: by providing a protective layer of rubber 8, a certain protective effect can be achieved on the seismic isolation component 2 to prevent the seismic isolation component 2 from being damaged. At the same time, since rubber is an elastomer, the seismic isolation effect of the seismic isolation component 2 can be further improved.

As a technical optimization solution of the utility model, the support assembly 5 includes a rotating rod 501, a U-shaped frame 502, a moving block 503 and a tension spring 504. The bottom end of the rotating rod 501 is rotatably connected to the bottom of the upper steel plate 1, the bottom end of the rotating rod 501 is rotatably connected to the inside of the U-shaped frame 502, the moving block 503 is fixedly connected to the bottom of the U-shaped frame 502, and the tension spring 504 is fixedly connected to the side where the two moving blocks 503 are away from each other.

In this embodiment: by setting up the support assembly 5, when the upper steel plate 1 moves downward, it will drive the rotating rod 501 to rotate, and when the two rotating rods 501 rotate, they will respectively drive the corresponding moving blocks 503 to move toward each other, and the extrusion force of the moving block 503 when moving and the tension of the tension spring 504 will form an offset, so that the seismic force exerted on the upper steel plate 1 can be further buffered and shock-absorbed, thereby improving the overall seismic isolation effect.

As a technical optimization solution of the utility model, a limiting groove 9 is opened on the top of the lower steel plate 3, and the side of the tension spring 504 close to the inner wall of the limiting groove 9 is fixedly connected to the inner wall of the limiting groove 9.

In this embodiment, by providing the limiting groove 9 , the moving block 503 and the tension spring 504 can be arranged inside the limiting groove 9 , thereby ensuring the stability of the supporting assembly 5 when in use.

As a technical optimization solution of the utility model, a slide rod 10 is fixedly connected inside the limiting groove 9, the moving block 503 is slidably connected to the surface of the slide rod 10, and the bottom of the U-shaped frame 502 is slidably connected to the top of the lower steel plate 3.

In this embodiment, the slide bar 10 is provided so that the slide bar 10 can limit the moving route of the moving block 503 , thereby improving the seismic isolation and buffering effect of the support assembly 5 .

As a technical optimization solution of the utility model, a groove 11 is provided on the top of the mounting block 4, and placement grooves 12 are provided on both sides of the groove 11. A damping rod 13 is fixedly connected inside the placement groove 12, and baffles 14 are fixedly connected on opposite sides of the two damping rods 13, and the baffles 14 are used in conjunction with the movable rod 7. A shock-absorbing spring 15 is sleeved on the surface of the damping rod 13, and the shock-absorbing spring 15 is fixedly connected to one side of the baffle 14 and the damping rod 13 respectively.

In this embodiment: by setting the groove 11 and the placement groove 12, the connecting block 6 can be movably connected inside the groove 11, and by setting the damping rod 13, the baffle 14 and the shock-absorbing spring 15, when the upper steel plate 1 is subjected to the horizontal seismic force, the movable rod 7 will squeeze the baffle 14, and the baffle 14 will squeeze the corresponding damping rod 13 and the shock-absorbing spring 15. The damping rod 13 and the shock-absorbing spring 15 can relieve the extrusion force, thereby achieving the effect of seismic isolation.

As a technical optimization solution of the utility model, a nylon plate 16 is fixedly connected inside the placement groove 12, and the baffle plate 14 is slidably connected to the nylon plate 16 on one side thereof.

In this embodiment: by providing the nylon plate 16, when the baffle 14 moves, its top and bottom will come into sliding contact with the nylon plate 16, so that a greater friction force can be generated between the baffle 14 and the nylon plate 16, thereby further improving the seismic isolation effect against earthquake force.

Working principle: First, when the upper steel plate 1 is subjected to vertical seismic force, the upper steel plate 1 will squeeze the upper sealing plate 201 downward, and the upper sealing plate 201 will squeeze the internal rubber plate 204 and the internal steel plate 205 downward in turn. Since the internal rubber plate 204 acts as an elastic body, it can absorb most of the seismic force. Then, when the upper steel plate 1 moves downward, it will drive the rotating rod 501 to rotate. When the two rotating rods 501 rotate, they will respectively drive the corresponding moving blocks 503 to move toward each other. The squeezing force of the moving block 503 when moving and the pulling force of the tension spring 504 will form an offset, thereby further buffering and reducing the seismic force applied to the upper steel plate 1. When the upper steel plate 1 is subjected to horizontal seismic force, the connecting block 6 will move inside the groove 11, and the movable rod 7 will squeeze the corresponding baffle 14. The baffle 14 will squeeze the corresponding damping rod 13 and the shock-absorbing spring 15. The damping rod 13 and the shock-absorbing spring 15 can relieve the squeezing force received, thereby achieving the effect of isolating the horizontal seismic force.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a civil engineering bridge is with shock insulation support, includes steel sheet (1), its characterized in that: the middle part of the bottom of the upper steel plate (1) is fixedly connected with a shock insulation component (2), the bottom of the shock insulation component (2) is fixedly connected with a lower steel plate (3), the bottom of the lower steel plate (3) is provided with a mounting block (4), the inside of the lower steel plate (3) is provided with a supporting component (5), the bottom of the lower steel plate (3) is fixedly connected with a connecting block (6), and two sides of the connecting block (6) are fixedly connected with movable rods (7);

The vibration isolation component (2) comprises an upper sealing plate (201), a lower sealing plate (202), a lead core column (203), an inner rubber plate (204) and an inner steel plate (205), wherein the top of the upper sealing plate (201) is fixedly connected with the bottom of the upper steel plate (1), the bottom of the lower sealing plate (202) is fixedly connected with the top of the lower steel plate (3), the lead core column (203) is fixedly connected between one opposite side of the upper sealing plate (201) and the lower sealing plate (202), the inner rubber plate (204) is fixedly connected with the surface of the lead core column (203) on the surface of the inner steel plate (205), and the inner rubber plate (204) and the inner steel plate (205) are arranged in a staggered mode.

2. The shock insulation support for a civil engineering bridge according to claim 1, wherein: the surfaces of the inner rubber plate (204) and the inner steel plate (205) are respectively provided with protective layer rubber (8).

3. The shock insulation support for a civil engineering bridge according to claim 1, wherein: the support assembly (5) comprises a rotating rod (501), a U-shaped frame (502), moving blocks (503) and an extension spring (504), wherein the bottom end of the rotating rod (501) is rotationally connected with the bottom of an upper steel plate (1), the bottom end of the rotating rod (501) is rotationally connected with the inside of the U-shaped frame (502), the moving blocks (503) are fixedly connected with the bottom of the U-shaped frame (502), and the extension spring (504) is fixedly connected with one side, away from the two moving blocks (503), of the extension spring.

4. A shock insulation support for a civil engineering bridge according to claim 3, wherein: the top of lower steel sheet (3) has seted up spacing groove (9), one side that extension spring (504) are close to spacing groove (9) inner wall is fixed connection with spacing groove (9) inner wall.

5. The shock insulation support for a civil engineering bridge according to claim 4, wherein: the inside fixedly connected with slide bar (10) of spacing groove (9), movable block (503) sliding connection is at the surface of slide bar (10), and the bottom of U-shaped frame (502) and the top sliding connection of lower steel sheet (3).

6. The shock insulation support for a civil engineering bridge according to claim 1, wherein: the top of installation piece (4) is seted up flutedly (11), standing groove (12) have all been seted up to the both sides of recess (11), inside fixedly connected with damping rod (13) of standing groove (12), the equal fixedly connected with baffle (14) of one side that two damping rods (13) are relative, and baffle (14) are used with movable rod (7) cooperation, damping spring (15) has been cup jointed on the surface of damping rod (13), and damping spring (15) are close to one side of baffle (14) and damping rod (13) respectively rather than fixed connection.

7. The shock insulation support for a civil engineering bridge according to claim 6, wherein: the inside fixedly connected with nylon board (16) of standing groove (12), one side that baffle (14) are close to nylon board (16) respectively with its sliding connection.