CN216615455U

CN216615455U - Steel spring reinforced multidirectional buffering limiting energy consumption type bridge anti-seismic stop block

Info

Publication number: CN216615455U
Application number: CN202122397221.5U
Authority: CN
Inventors: 王靓妮; 蒋涛
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-05-27
Anticipated expiration: 2031-09-30

Abstract

The utility model relates to the technical field of bridge earthquake resistance, in particular to a steel spring reinforced multidirectional buffering limiting energy consumption type bridge earthquake-resistant stop block which comprises a steel corbel and a stop block structure, wherein the steel corbel is fixed above the side wall of a pier, and the stop block structure comprises an upper concave stop block and a lower square stop block; the steel spring is fixed below two sides of the concave stop block; the buffer device comprises a movable steel plate, a compression spring and a triangular stop block. The utility model limits the overlarge displacement between the upper main beam and the lower pier in the transverse bridge direction and the forward bridge direction of the bridge, and prevents the falling beam of the beam body in the transverse bridge direction and the forward bridge direction from being damaged by vibration; transferring the collision between adjacent beams at the expansion joint to a plurality of bridge anti-seismic stop blocks, and reducing the expansion impact damage at the expansion joint and the local damage of the collision area between adjacent beam bodies; the stop block has certain resetting capability; the material price is low, and simple structure is under construction convenience.

Description

Steel spring reinforced multidirectional buffering limiting energy consumption type bridge anti-seismic stop block

Technical Field

The utility model relates to the technical field of bridge seismic resistance, in particular to a steel spring reinforced multidirectional buffering limiting energy consumption type bridge seismic stop block.

Background

When an earthquake occurs, firstly, the life and property safety of people is greatly threatened, and on the other hand, the earthquake causes serious damage to bridge engineering in an earthquake area, so that the external traffic of the earthquake affected area is cut off, an island effect is caused, great difficulty is caused to disaster relief work after the earthquake, subsequent secondary disasters are caused, and the economic loss is indirectly more serious. In addition, the bridge is high in construction cost and large in construction quantity, the bridge is an important node and a junction of a traffic life line, but due to the structural characteristics of the bridge, the bridge is also a weak link in a traffic line, once the bridge is damaged by an earthquake, loss is huge, and repair work after the earthquake is difficult and heavy. Based on the defects, the research of strengthening the bridge to resist earthquake damage and reducing the damage of the earthquake to the bridge as far as possible has important significance for the development of the bridge.

The bridge damage caused by earthquake mainly has the following forms: 1. the phenomenon of beam falling is caused by failure of support connection or overlarge displacement of an upper beam body, and most of the phenomenon occurs along the bridge direction; 2. the beam body at the expansion joint is collided to cause local damage; 3. the drop of the movable support, the displacement of the support or the structural damage of the support; 4. bending and shearing the pier stud, inclining and sliding the abutment, and colliding and damaging the abutment body and the upper structure; 5. the foundation failure causes the earthquake damage of the pile foundation and the shearing and bending damage of the pile foundation caused by the inertia force transferred by the upper structure.

The collapse of the bridge in the earthquake can bring a lot of harm, but China still has many bridges designed according to the original design standard or damaged to a certain extent, and the bridges can not meet the social requirements of large quantity of vehicles and heavy transportation weight at present, and a large amount of manpower and material resources are needed for reinforcing or reconstructing the bridges.

In order to limit the transverse displacement of the upper beam body of the bridge, reinforced concrete stop blocks are usually arranged on two sides of the top of the pier capping beam, and the precautionary measures for limiting the displacement of the upper beam body along the bridge direction and the vertical direction are relatively few. However, the bridge often falls along the bridge direction after being shocked, the collision between the common reinforced concrete stop block and the beam body is rigid collision, local damage is easily caused, and the transverse bridge stop block is easily irreparably damaged due to insufficient stress performance of the structure, so that the displacement of the beam body cannot be well limited.

Aiming at the defects, a novel multidirectional limiting anti-seismic stop block structure needs to be designed and developed, the displacement of the upper beam body can be limited in multiple directions, a buffering energy consumption device can be arranged, and the stop block is reduced and damaged when the beam body is limited to be greatly displaced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provides a steel spring reinforced multidirectional buffering limiting energy-consumption type bridge anti-seismic stop block which limits overlarge displacement between an upper main beam and a lower pier in the transverse bridge direction and the forward bridge direction of a bridge and prevents a bridge body from falling into the transverse bridge direction and the forward bridge direction to cause seismic damage; transferring the collision between adjacent beams at the expansion joint to a plurality of bridge anti-seismic stop blocks, and reducing the expansion impact damage at the expansion joint and the local damage of the collision area between adjacent beam bodies; reinforcing the structure at a plurality of positions by using steel springs, converting rigid collision between the beam and the stop block into elastic collision as much as possible, avoiding the damage of the stop block and simultaneously consuming earthquake energy; due to the characteristics of the steel spring, the stop block has certain reset capacity; the collision between the bridge and the support can be reduced in the vertical direction, and the damage of the support is reduced as much as possible.

In order to realize the purpose of the utility model, the utility model adopts the technical scheme that:

the utility model discloses a steel spring reinforced multidirectional buffering limiting energy consumption type bridge anti-seismic stop block, which comprises a steel corbel and a stop block structure, wherein the steel corbel is fixed above the side wall of a pier through a steel corbel bolt, the stop block structure comprises a steel top plate fixed at the bottom of a main beam through a steel top plate bolt and a square stop block fixed at the top of the steel corbel, a concave stop block in an inverted concave structure is fixed at the bottom of the steel top plate, a rough friction surface is formed on the upper surface of the square stop block, the friction surface is in close contact with the top of a groove at the bottom of the concave stop block, and a plurality of stop block compression springs are connected between the upper part of the side wall of the square stop block and the side wall of the groove at the bottom of the concave stop block; and a bridge fixed support arranged on the support base stone is arranged between the main beam and the bridge pier.

The steel corbel comprises a top plate, an inner side plate, an outer side plate and a web plate, wherein the inner side plate is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of the pier; and a top plate and two webs which are perpendicular to the top plate are arranged between the outer side plate and the upper part of the inner wall of the inner side plate, and the top of each web is connected with the bottom of the top plate.

And steel springs are arranged between the two sides of the bottom of the concave check block and the top plate, and the two ends of each steel spring are welded to the two sides of the bottom of the concave check block and the top plate respectively.

The two sides of the bottom of the concave check block are hinged to the top end of the connecting steel plate, the bottom end of the connecting steel plate is hinged to the top plate through a first rotating hinged support, and the first rotating hinged support is fixed to the top of the top plate.

The buffer device comprises a movable steel plate, a compression spring and a triangular baffle plate, wherein the buffer device is symmetrically distributed on two sides of the connecting steel plate, the bottom of the triangular baffle plate is fixed on the top plate, the bottom end of the movable steel plate is fixed on the top plate through a second rotating hinged support, and the compression spring is fixed between the triangular baffle plate and the movable steel plate.

The connecting steel plate and the movable steel plate are energy-dissipation reset type low-yield-strength steel, and the yield strength of the connecting steel plate and the yield strength of the movable steel plate are lower than those of other steel materials in the stop block structure.

The triangular baffle is made of rubber materials.

An expansion joint is formed between the main beam and the second main beam, a movable bridge support arranged on a second support cushion stone is arranged between the second main beam and the bridge pier, and the maximum displacement of the steel spring is smaller than the maximum movable distance of the movable bridge support; the maximum displacement of the steel spring is smaller than the width of the expansion joint.

The utility model has the beneficial effects that:

(1) the utility model can limit the bridge from generating large displacement in a plurality of directions. When the earthquake comes, the bridge takes place the displacement in the cross bridge to, along the bridge to and vertically, near each movable support installation steel spring fixed energy dissipation buffer type bridge antidetonation dog, utilize steel spring and dog can restrict the relatively great displacement of upper portion roof beam body in three direction simultaneously, the protection support prevents that the roof beam body from damaging with the warp that the roof beam body vertically breaks away from the support and taking place along the bridge to, the roof beam body that falls of cross bridge to damage, prevents that the vertical collision of roof beam body and support from damaging. The device is large in arrangement quantity and dispersed in position, and can effectively reduce the seismic force acting on each stop block and protect the bridge from being damaged;

(2) the utility model has certain buffering energy consumption capability. When the upper beam body and the pier displace, the connecting steel plate deforms, seismic energy is consumed by means of energy generated by plastic deformation of the connecting steel plate, and the connecting steel plate can limit vertical displacement of the beam body; the connecting steel spring connected with the connecting steel spring generates elastic deformation to prevent the bridge from displacing and consuming earthquake energy; meanwhile, the energy-consuming type low-yield-point steel plate and the steel spring in the buffer devices connected with the two ends of the steel sheet play a certain energy-consuming buffer role; the sliding friction force generated by the transverse bridge-direction displacement of the square stop block and the concave stop block (the sliding friction force plays a role in the displacement along the bridge direction) can also consume the seismic energy;

(3) the utility model has the advantages of low material price, simple structure, convenient construction and the like.

Drawings

FIG. 1 is a schematic representation of a forward-to-bridge arrangement of the present invention;

FIG. 2 is a transverse bridging layout of the present invention;

FIG. 3 is a schematic representation of a forward bridge configuration of the present invention;

FIG. 4 is a schematic view of a transverse bridge structure according to the present invention.

In the figure: 1 steel corbel, 2 square stoppers, 3 concave stoppers, 4 connecting steel plates, 5 steel springs, 6 triangular stoppers, 7 compression springs, 8 movable steel plates, 9 first rotating hinged supports, 10 second rotating hinged supports, 11 top plates, 12 inner side plates, 13 outer side plates, 14 webs, 15 steel corbel bolts, 16 steel top plate bolts, 17 stopper compression springs, 18 friction surfaces, 19 girders, 20 second girders, 21 bridge fixed supports, 22 support cushion stones, 23 bridge movable supports, 24 second support cushion stones, 25 piers, 26 stopper structures, 27 buffer devices, 28 expansion joints and 29 steel top plates.

Detailed Description

The utility model is further illustrated below:

referring to figures 1-4 of the drawings,

the utility model discloses a steel spring reinforced multidirectional buffering limiting energy consumption type bridge anti-seismic stop block, which comprises a steel corbel 1 and a stop block structure 26, wherein the steel corbel 1 is fixed above the side wall of a pier 25 through a steel corbel bolt 15, the stop block structure 26 comprises a steel top plate 29 fixed at the bottom of a main beam 19 through a steel top plate bolt 16 and a square stop block 2 fixed at the top of the steel corbel 1, a concave stop block 3 in an inverted 'concave' structure is fixed at the bottom of the steel top plate 29, a rough friction surface 18 is formed on the upper surface of the square stop block 2, the friction surface 18 is in close contact with the top of a groove at the bottom of the concave stop block 3, and a plurality of stop block compression springs 17 are connected between the upper part of the side wall of the square stop block 2 and the side wall of the groove at the bottom of the concave stop block 3; and a bridge fixed support 21 arranged on a support cushion 22 is arranged between the main beam 19 and the pier 25.

The steel corbel 1 comprises a top plate 11, an inner side plate 12, an outer side plate 13 and a web plate 14, wherein the inner side plate 12 is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of the pier 25; a top plate 11 and two webs 14 which are perpendicular to the top plate are arranged between the outer side plate 13 and the upper part of the inner wall of the inner side plate 12, and the top of the webs 14 is connected with the bottom of the top plate 11.

And steel springs 5 are arranged between the two sides of the bottom of the concave stop block 3 and the top plate 11, and the two ends of each steel spring 5 are welded on the two sides of the bottom of the concave stop block 3 and the top plate 11 respectively.

The two sides of the bottom of the concave stop block 3 are hinged to the top end of the connecting steel plate 4, the bottom end of the connecting steel plate 4 is hinged to the top plate 11 through a first rotating hinged support 9, and the first rotating hinged support 9 is fixed to the top of the top plate 11.

Two side symmetric distributions of connecting steel plate 4 have buffer 27, buffer 27 includes movable steel plate 8, compression spring 7 and triangle baffle 6, the bottom of triangle baffle 6 is fixed in on the roof 11, movable steel plate 8 bottom is fixed in through second rotating hinge support 10 on the roof 11, compression spring 7 is fixed in between triangle baffle 6 and the movable steel plate 8.

The connecting steel plate 4 and the movable steel plate 8 are energy-dissipating reset type low-yield-strength steel, and the yield strength of the steel is lower than that of other steel in the block structure 26.

The triangular baffle 6 is made of rubber materials.

An expansion joint 28 is formed between the main beam 19 and the second main beam 20, a movable bridge support 23 arranged on a second support cushion 24 is arranged between the second main beam 20 and the pier 25, and the maximum displacement of the steel spring 5 is smaller than the maximum movable distance of the movable bridge support 23; the maximum displacement of the steel spring 5 is smaller than the width of the expansion joint 28.

The working principle is as follows: under the condition that no earthquake occurs, the connecting steel plate 4 is in a vertical state and has no deformation, the square stop block 2 is positioned in the middle of the groove of the concave stop block 3, the upper surface of the square stop block is in close contact with the lower surface of the groove of the concave stop block 3, and springs at all positions are in a natural state and have no deformation; under the action of an earthquake, the main beam 19 and the bridge pier 25 are relatively displaced, on one hand, the connecting steel plate 4 deforms along the bridge direction, and the energy generated by the plastic deformation of the connecting steel plate consumes the earthquake energy, so that the bridge is protected; meanwhile, the steel spring 5 converts a part of seismic energy into elastic potential energy due to stretching (compression), and further consumes the seismic energy and limits the displacement of the structure in the bridge direction; when the structure moves to a certain distance along the bridge, the connecting steel plate 4 is in contact with the movable steel plate 8, when the structure continues to move along the bridge, the compression spring 7 connected with the movable steel plate 8 is compressed, seismic energy is converted into elastic potential energy of the compression spring, the structure is prevented from continuing to move, the rubber triangular baffle 6 consumes the seismic energy in the process, and meanwhile, the energy-consuming reset type low-yield-strength steel movable steel plate 8 can also consume the seismic energy; on the other hand, because the contact surface between the square stopper 2 and the concave stopper 3 is rough, when the displacement occurs along the bridge direction, the contact surface slides relatively, and frictional heat consumes a part of the seismic energy. In the transverse bridge direction, the earthquake energy can be consumed by the elastic potential energy generated by the block compression spring 17 and the sliding friction force generated by the transverse bridge direction displacement of the square block 2 and the concave block 3, so that the transverse bridge direction displacement of the bridge is limited; when the earthquake stops, the bridge is reset to a certain extent under the action of the buffer device 27 and the steel spring 5.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the drawings or directly or indirectly applied to the related technical fields are included in the scope of the present invention.

Claims

1. The utility model provides a spacing power consumption type bridge antidetonation dog of reinforced (rfd) multidirectional buffering of steel spring which characterized in that: the steel corbel fixing structure comprises a steel corbel (1) and a stop block structure (26), wherein the steel corbel (1) is fixed above the side wall of a pier (25) through a steel corbel bolt (15), the stop block structure (26) comprises a steel top plate (29) fixed to the bottom of a main beam (19) through a steel top plate bolt (16) and a square stop block (2) fixed to the top of the steel corbel (1), a concave stop block (3) in an inverted concave structure is fixed to the bottom of the steel top plate (29), a rough friction surface (18) is formed on the upper surface of the square stop block (2), the friction surface (18) is in close contact with the top of a groove at the bottom of the concave stop block (3), and a plurality of compression springs (17) are connected between the upper portion of the side wall of the square stop block (2) and the side wall of the groove at the bottom of the concave stop block (3); and a bridge fixed support (21) arranged on the support cushion stone (22) is arranged between the main beam (19) and the pier (25).

2. The steel spring reinforced multidirectional buffering and limiting energy consumption type bridge anti-seismic stop block as claimed in claim 1, wherein: the steel corbel (1) comprises a top plate (11), an inner side plate (12), an outer side plate (13) and a web plate (14), wherein the inner side plate (12) is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of the pier (25); a top plate (11) and two webs (14) which are perpendicular to the top plate are arranged between the outer side plate (13) and the upper portion of the inner wall of the inner side plate (12), and the top of each web (14) is connected with the bottom of the top plate (11).

3. The steel spring reinforced multidirectional buffering and limiting energy consumption type bridge anti-seismic stop block as claimed in claim 2, wherein: and steel springs (5) are arranged between the two sides of the bottom of the concave check block (3) and the top plate (11), and the two ends of each steel spring (5) are welded to the two sides of the bottom of the concave check block (3) and the top plate (11) respectively.

4. The steel spring reinforced multidirectional buffering and limiting energy consumption type bridge anti-seismic stop block is characterized in that: the two sides of the bottom of the concave stop block (3) are hinged to the top end of the connecting steel plate (4), the bottom end of the connecting steel plate (4) is hinged to the top plate (11) through a first rotating hinged support (9), and the first rotating hinged support (9) is fixed to the top of the top plate (11).

5. The steel spring reinforced multidirectional buffering and limiting energy consumption type bridge anti-seismic stop block is characterized in that: the two sides of the connecting steel plate (4) are symmetrically provided with buffer devices (27), each buffer device (27) comprises a movable steel plate (8), a compression spring (7) and a triangular baffle (6), the bottom of the triangular baffle (6) is fixed on the top plate (11), the bottom end of the movable steel plate (8) is fixed on the top plate (11) through a second rotating hinged support (10), and the compression springs (7) are fixed between the triangular baffle (6) and the movable steel plate (8).

6. The steel spring reinforced multidirectional buffering and limiting energy consumption type bridge anti-seismic stop block as claimed in claim 5, wherein: the connecting steel plate (4) and the movable steel plate (8) are energy-consumption reset type low-yield-strength steel, and the yield strength of the steel is lower than that of steel in the block structure (26).

7. The steel spring reinforced multidirectional buffering and limiting energy consumption type bridge anti-seismic stop block as claimed in claim 6, wherein: the triangular baffle (6) is made of rubber materials.

8. The steel spring reinforced multidirectional buffering and limiting energy consumption type bridge anti-seismic stop block as claimed in claim 7, wherein: an expansion joint (28) is formed between the main beam (19) and the second main beam (20), a movable bridge support (23) arranged on a second support cushion (24) is arranged between the second main beam (20) and the pier (25), and the maximum displacement of the steel spring (5) is smaller than the maximum distance that the movable bridge support (23) can move; the maximum displacement of the steel spring (5) is smaller than the width of the expansion joint (28).