CN212270639U

CN212270639U - Multidirectional buffering, limiting and energy-consuming resettable bridge anti-seismic stop block structure

Info

Publication number: CN212270639U
Application number: CN202020224957.5U
Authority: CN
Inventors: 田钦; 黎学桐; 童治豪; 李顺治
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2021-01-01
Anticipated expiration: 2030-02-28

Abstract

The utility model discloses a multidirectional spacing power consumption of buffering bridge antidetonation dog structure that can reset, including steel corbel, dog structure, the steel corbel passes through steel corbel bolt fastening in pier lateral wall top, the dog structure includes the steel roof that is fixed in the girder bottom through the steel roof bolt fastening, is fixed in the square dog at steel corbel top, the bottom of steel roof is fixed with the spill dog that is down "concave" shape structure, the upper surface of square dog forms coarse friction surface, the friction surface with the recess top in close contact with of spill dog bottom, the lateral wall top of square dog with be equipped with a plurality of dog compression springs between the recess lateral wall of spill dog bottom. The utility model discloses can multidirectional spacing power consumption, the utility model discloses the material price is low, simple structure, construction convenience.

Description

Multidirectional buffering, limiting and energy-consuming resettable bridge anti-seismic stop block structure

Technical Field

The utility model belongs to the technical field of the bridge antidetonation, concretely relates to spacing power consumption of multidirectional buffering can reset type bridge antidetonation dog structure.

Background

Along with the development of economic strength of China, the investment of transportation construction is more and more. The construction of large-scale traffic infrastructure promotes the development of city and regional economy, and in order to save land resources, the traffic construction in China advocates using bridges to replace roads, which also brings a chance for the high-speed development of bridge engineering in China. At present, more and more high-speed railways, viaducts and large-span bridges are built, and more than one million bridges are built in China at present.

China is located among a plurality of earthquake zones and is a country with multiple earthquakes, and Wenchuan earthquake and Yushu earthquake in recent years bring huge economic loss to China. 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 indirect economic loss is more serious.

The bridge has high construction cost and large construction quantity, is an important node and a junction of a traffic life line, is a weak ring in a traffic line due to the structural characteristics of the bridge, has huge loss once damaged by an earthquake, and is difficult and heavy to repair after the earthquake.

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 large displacement of the upper beam body of the bridge in the transverse direction, 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 in the transverse 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

In view of the above defects of the prior art, the utility model designs and develops a novel multidirectional buffering, limiting and energy-consuming resettable bridge anti-seismic stop block structure, which aims to limit the overlarge displacement between an upper girder and a lower pier in the transverse bridge direction and the along bridge direction of a bridge and prevent the falling of a girder body in the transverse bridge direction and the along 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; rigid collision between an upper beam body and the anti-seismic stop block is transferred through an internal stop block structure and a rotating mechanism, multiple buffering energy consumption is realized, and flexible collision of the internal structure of the anti-seismic stop block of the bridge is realized. The utility model discloses also can restrict the vertical displacement of girder, prevent the vertical warpage damage of the roof beam body, make the support when taking place vertical collision with the roof beam body, its self damage is littleer. Novel bridge antidetonation dog, its inside multiple antidetonation buffer's setting has not only significantly reduced the damage to dog itself, has prevented moreover that the inertial force of superstructure transmission from leading to pile foundation shearing, crooked destruction, has also reduced the damage of pier bottom structure to play the antidetonation effect of bridge.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the utility model provides a multidirectional spacing power consumption type bridge antidetonation dog structure that can reset of buffering, includes steel corbel, dog structure, the steel corbel passes through steel corbel bolt fastening in pier lateral wall top, the dog structure includes the steel roof board of girder bottom through steel roof board bolt fastening, is fixed in the square dog at steel corbel top, the bottom of steel roof board is fixed with the spill dog that is "concave" shape structure, the upper surface of square dog forms coarse friction surface, the friction surface with the recess top in close contact with of spill dog bottom, the lateral wall top of square dog with be equipped with a plurality of dog compression springs between the recess lateral wall of spill dog bottom.

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.

The bottom both sides of spill dog with be equipped with slewing mechanism between the roof, slewing mechanism includes and rotates the steel sheet, rotates the steel sheet down, goes up triangle dog and triangle dog down, go up the long right-angle lateral wall of triangle dog with the bottom both sides fixed connection of spill dog, the long right-angle lateral wall of triangle dog is fixed in down the upper surface of roof, it is articulated through rotating the hinge to go up to rotate steel sheet and rotate steel sheet one end down, and both the other ends are fixed respectively on second rotation hinged-support and third rotation hinged-support, second, third rotation hinged-support are fixed in respectively the less one end tip of width of upper and lower triangle dog, upward rotate and be equipped with top compression spring between steel sheet and the last triangle dog, be equipped with below compression spring down between lower rotation steel sheet and the lower triangle dog.

The rotating mechanism further comprises a connecting steel plate, the top end of the connecting steel plate is welded with the two sides of the bottom of the concave stop block, 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 upper triangular stop block and the lower triangular stop block are made of rubber materials.

The connecting steel plate is energy-consuming reset type low-yield-strength steel.

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

The beneficial effects of the utility model reside in that:

1) the utility model discloses can effectively restrict the relative great displacement in the same direction as the bridge between the bridge girder body and the pier, prevent that the girder body from falling the roof beam and damaging, reduce the seismic damage at movable support and expansion joint, reduce the damage at the bottom of the pier and pile foundation structure. The anti-seismic devices are arranged near each movable support, the positions are dispersed, the number is large, the displacement of the bridge along the bridge direction can be effectively limited, the seismic force acting on each device is reduced, and the damage to the device is reduced.

2) The utility model discloses can the spacing power consumption of multidirectional. 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; meanwhile, the structure and the bridge are limited to move along the bridge direction greatly due to the action of the rotating mechanism and the upper and lower triangular stop blocks; when the transverse bridge direction is displaced, the earthquake energy can be consumed by the elastic potential energy generated by the block compression spring and the sliding friction force generated by the transverse bridge direction displacement of the square block and the concave block (the sliding friction force plays a role in the displacement along the bridge direction), so that the transverse bridge direction displacement of the bridge is limited.

3) The utility model discloses can realize certain reset function. After the earthquake, because the restoring force effect of top compression spring and below compression spring for the connecting plate can resume original position and state, goes up to rotate the steel sheet and can resume on original position with lower rotation steel sheet. The stop compression spring can also provide a certain reset function for the transverse bridge.

4) The utility model has the advantages of low material price, simple structure, convenient construction, etc.

Drawings

FIG. 1 is a schematic diagram of the arrangement of the present invention along the direction of the bridge;

FIG. 2 is a cross-bridge layout diagram of the present invention;

FIG. 3 is the schematic diagram of the forward direction structure of the present invention

FIG. 4 is a diagram showing a first working state of the present invention under the action of an earthquake;

FIG. 5 is a diagram showing a second working state of the present invention under the action of an earthquake;

FIG. 6 is a schematic view of a transverse bridge structure of the present invention;

fig. 7 is a schematic view of the overall three-dimensional structure of the present invention.

In the figure: 1 steel corbel, 2 square stoppers, 3 concave stoppers, 4 connecting steel plates, 5, a first rotating hinged support, 6 steel top plates, 7 upper triangular stoppers, 8 lower triangular stoppers, 9 second rotating hinged supports, 10 third rotating hinged supports 11, upper rotating steel plates, 12 lower rotating steel plates, 13 rotating hinges, 14 upper compression springs, 15 lower compression springs, 16 top plates, 17 inner side plates, 18 outer side plates, 19 web plates, 20 steel corbel bolts, 21 steel top plate bolts, 22 stopper compression springs, 23 friction surfaces, 24 main beams, 25 second main beams, 26 bridge fixed supports, 27 support base stones, 28 bridge movable supports, 29 second support base stones, 30 piers, 31 rotating mechanisms, 32 stopper structures and 33 expansion joints.

Detailed Description

The following further description of the present invention

Referring to figures 1-7 of the drawings,

the utility model discloses a multidirectional buffering spacing power consumption type bridge antidetonation dog structure that can reset, including steel corbel 1, dog structure 32, steel corbel 1 passes through steel corbel bolt 20 to be fixed in pier 30 lateral wall top, dog structure 32 includes steel roof 6, the square dog 2 of being fixed in the top of steel corbel 1 that is fixed in girder 24 bottom through steel roof bolt 21, the bottom of steel roof 6 is fixed with the spill dog 3 that is the structure of falling "concave" shape, the upper surface of square dog 2 forms coarse friction surface 23, friction surface 23 with the recess top of spill dog 3 bottom in close contact with, be equipped with a plurality of dog compression springs 22 above the lateral wall of square dog 2 and between the recess lateral wall of spill dog 3 bottom; and a bridge fixed support 26 arranged on a support cushion 27 is arranged between the main beam 24 and the pier 30.

The steel corbel 1 comprises a top plate 16, an inner side plate 17, an outer side plate 18 and a web plate 19, wherein the inner side plate 17 is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of the pier 30; a top plate 16 and two webs 19 which are perpendicular to the top plate are arranged between the outer side plate 18 and the upper part of the inner wall of the inner side plate 17, and the top of the webs 19 is connected with the bottom of the top plate 16.

A rotating mechanism 31 is arranged between two sides of the bottom of the concave stopper 3 and the top plate 16, the rotating mechanism 31 comprises an upper rotating steel plate 11, a lower rotating steel plate 12, an upper triangular stopper 7 and a lower triangular stopper 8, the long right-angle side wall of the upper triangular stopper 7 is fixedly connected with two sides of the bottom of the concave stopper 3, the long right-angle side wall of the lower triangular stopper 8 is fixed on the upper surface of the top plate 16, one end of the upper rotating steel plate 11 is hinged with one end of the lower rotating steel plate 12 through a rotating hinge 13, the other end of the upper rotating steel plate 11 and the other end of the lower rotating steel plate 12 are respectively fixed on a second rotating hinged support 9 and a third rotating hinged support 10, the second rotating hinged support and the third rotating hinged support are respectively fixed on the end parts of the upper triangular stopper and the lower triangular stopper, an upper compression spring 14 is arranged between the upper rotating steel plate 11 and the upper triangular stopper 7, and a lower compression, the energy consumption is buffered when the bridge vibrates and displaces along the bridge direction, and the device is convenient to reset after the vibration.

The rotating mechanism 31 further comprises a connecting steel plate 4, the top end of the connecting steel plate 4 is welded with the two sides of the bottom of the concave stop block 3, the bottom end of the connecting steel plate is hinged to the top plate 16 through a first rotating hinged support 5, and the first rotating hinged support 5 is fixed to the top of the top plate 16.

The upper triangular stop block 7 and the lower triangular stop block 8 are made of rubber materials.

The connecting steel plate 4 is energy-consumption reset type low-yield-strength steel, the yield strength of the connecting steel plate is lower than that of other steel materials in the anti-seismic stop block structure, and the energy-consumption reset type low-yield-point steel plate is larger in deformation and consumes seismic energy than other common steel plates in the earthquake.

An expansion joint 33 is formed between the main beam 24 and the second main beam 25, a movable bridge support 28 arranged on a second support cushion 29 is arranged between the second main beam 25 and the pier 30, and the maximum displacement of the rotating mechanism 31 is smaller than the maximum movable distance of the movable bridge support 28; the maximum displacement of the rotating mechanism 31 is smaller than the width of the expansion joint 33.

The working principle is as follows: under the condition of no earthquake, 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 earthquake, the main beam 24 and the pier 30 are relatively displaced, on one hand, the connecting steel plate 4 deforms along the bridge direction, and the earthquake energy is consumed by means of the energy generated by the plastic deformation of the connecting steel plate, so that the damage of the earthquake to other members of the bridge is reduced, meanwhile, the upper rotating steel plate 11 rotates towards the direction close to the upper triangular stop 7, the lower rotating steel plate 12 rotates towards the direction far away from the lower triangular stop 8, the upper compression spring 14 is compressed, and the lower compression spring 15 is stretched (when the relative displacement directions of the main beam 24 and the pier 30 are opposite, the rotating directions of the upper and lower rotating

steel plates

11 and 12 are opposite to the pulling and pressing states of the upper and lower compression springs 14 and 15), a part of earthquake energy is converted into the elastic potential energy of the springs, and due to the action of the upper triangular stop 7 and the lower triangular stop 8, the large displacement of the structure is limited, on the other, the square stop block 2 and the concave stop block 3 are relatively displaced, and a part of seismic energy is dissipated by virtue of sliding friction force generated by the square stop block 2 and the concave stop block 3; in the transverse bridge direction, the earthquake energy can be consumed by means of the elastic potential energy generated by the block compression spring 22 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; after the earthquake is finished, the structure can realize a certain reset function after the earthquake due to the restoring force action of the upper compression spring 14, the lower compression spring 15 and the stop compression spring 22.

The above mentioned is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings or the direct or indirect application in the related technical field are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a spacing power consumption of multidirectional buffering can reset type bridge antidetonation dog structure which characterized in that: including steel corbel (1), dog structure (32), steel corbel (1) is fixed in pier (30) lateral wall top through steel corbel bolt (20), dog structure (32) include steel roof (6) that are fixed in girder (24) bottom through steel roof bolt (21), are fixed in square dog (2) at steel corbel (1) top, the bottom of steel roof (6) is fixed with spill dog (3) that are "concave" shape structure, the upper surface of square dog (2) forms coarse friction surface (23), friction surface (23) with the recess top in close contact with of spill dog (3) bottom, the lateral wall top of square dog (2) with be equipped with a plurality of dog compression spring (22) between the recess lateral wall of spill dog (3) bottom.

2. The multidirectional buffering, limiting and energy-dissipating resettable bridge anti-seismic stop structure according to claim 1, wherein: the steel corbel (1) comprises a top plate (16), an inner side plate (17), an outer side plate (18) and a web plate (19), wherein the inner side plate (17) is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of the pier (30); a top plate (16) and two webs (19) which are perpendicular to the top plate are arranged between the outer side plate (18) and the upper portion of the inner wall of the inner side plate (17), and the top of each web (19) is connected with the bottom of the top plate (16).

3. The multidirectional buffering, limiting and energy-dissipating resettable bridge anti-seismic stop structure according to claim 2, wherein: the bottom both sides of spill dog (3) with be equipped with slewing mechanism (31) between roof (16), slewing mechanism (31) including last rotation steel sheet (11), lower rotation steel sheet (12), go up triangle dog (7) and lower triangle dog (8), go up the long right-angle lateral wall of triangle dog (7) with the bottom both sides fixed connection of spill dog (3), the long right-angle lateral wall of lower triangle dog (8) is fixed in the upper surface of roof (16), go up rotation steel sheet (11) and lower rotation steel sheet (12) one end and pass through rotation hinge (13) articulated, both the other ends are fixed respectively on second rotation hinged-support (9) and third rotation hinged-support (10), second, third rotation hinged-support are fixed in respectively the less one end tip of width of upper and lower triangle dog, it compresses spring (14) to be equipped with the top between steel sheet (11) and the last triangle dog (7), a lower compression spring (15) is arranged between the lower rotating steel plate (12) and the lower triangular stop block (8).

4. The multidirectional buffering, limiting and energy-dissipating resettable bridge anti-seismic stop structure according to claim 3, wherein: the rotating mechanism (31) further comprises a connecting steel plate (4), the top end of the connecting steel plate (4) is welded with the two sides of the bottom of the concave stop block (3), the bottom end of the connecting steel plate is hinged to the top plate (16) through a first rotating hinged support (5), and the first rotating hinged support (5) is fixed to the top of the top plate (16).

5. The multidirectional buffering, limiting and energy-dissipating resettable bridge anti-seismic stop structure according to claim 4, wherein: the upper triangular stop block (7) and the lower triangular stop block (8) are made of rubber materials.

6. The multidirectional buffering, limiting and energy-dissipating resettable bridge anti-seismic stop structure according to claim 5, wherein: the connecting steel plate (4) is energy-consumption reset type low-yield-strength steel.

7. The multidirectional buffering, limiting and energy-dissipating resettable bridge anti-seismic stop structure according to claim 6, wherein: an expansion joint (33) is formed between the main beam (24) and the second main beam (25), a movable bridge support (28) arranged on a second support cushion stone (29) is arranged between the second main beam (25) and the pier (30), and the maximum displacement of the rotating mechanism (31) is smaller than the maximum movable distance of the movable bridge support (28); the maximum displacement of the rotating mechanism (31) is smaller than the width of the expansion joint (33).