CN215164549U - Collision sliding energy consumption type bridge anti-seismic stop block structure with steel springs - Google Patents
Collision sliding energy consumption type bridge anti-seismic stop block structure with steel springs Download PDFInfo
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- CN215164549U CN215164549U CN202120413024.5U CN202120413024U CN215164549U CN 215164549 U CN215164549 U CN 215164549U CN 202120413024 U CN202120413024 U CN 202120413024U CN 215164549 U CN215164549 U CN 215164549U
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Abstract
The utility model belongs to the technical field of the bridge antidetonation, concretely relates to collision slip energy consumption type bridge antidetonation dog structure with steel spring, including steel corbel and dog structure, the side at near the pier top of movable support is fixed to the steel corbel, the dog structure is fixed in steel corbel top and girder bottom. The stop block structure comprises a steel bottom plate, a sliding groove, a steel spring, an impact block, an energy-consuming type low-yield-point steel plate and a double-hemispherical sliding block. The utility model discloses bridge antidetonation dog structure relies on the plastic deformation of collision, slip and the low yield point steel sheet of power consumption type to consume seismic energy, can effectively restrict the great displacement between the roof beam body and the pier, prevents that the roof beam body from taking place to fall roof beam harm in the same direction as the bridge, reduces the damage of movable support and expansion joint, and this antidetonation dog structural arrangement is near each movable support simultaneously, and the collision position disperses, and is in large quantity, can effectively reduce the earthquake power of being used in each dog structure.
Description
Technical Field
The utility model belongs to the technical field of the bridge antidetonation, concretely relates to collision slip energy consumption type bridge antidetonation dog structure and arrangement method with steel spring.
Background
In order to improve the transportation efficiency of the road, protect the ecological environment along the road and save land resources, the idea of replacing the road with a bridge will lead the future infrastructure construction. 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.
Therefore, the research work of bridge seismic resistance and damping technology is carried out, and the method has important practical significance and theoretical value for improving the seismic resistance, especially the capability of resisting large earthquakes and improving the resistance of the whole country to natural disasters such as earthquakes. In earth quakes that have occurred in the past decades, the modes of seismic damage of bridges have mainly included: the support is damaged; if the displacement of the upper beam body of the beam bridge exceeds the supporting surface of the bridge pier, the landing beam can be caused to shake (including the transverse bridge direction and the forward bridge direction); when the upper beam body falls down, if the upper beam body impacts the bridge pier, the lower structure is greatly damaged by collision; local damage caused by collision of adjacent beam bodies at the expansion joint; the relatively large collision force at the expansion joint can also transmit the collision force effect at the expansion joint to the bottom of the bridge pier, so that the bottom of the bridge pier is damaged; the local damage of bridge antidetonation dog self to lose the antidetonation function of dog.
In order to limit the large displacement of the upper beam body of the bridge along the bridge direction, reinforced concrete stop blocks are usually arranged on two sides of the top of a pier capping beam, but the collision between the common reinforced concrete stop blocks and the beam body is rigid collision, the impact force is large, the beam body and the concrete stop blocks are easily damaged locally, the horizontal shearing force of the reinforced concrete stop blocks in an earthquake is usually insufficient, the stop blocks are easily damaged irreparably, and the displacement of the beam body cannot be well limited.
Aiming at the defects, a novel anti-seismic stop block structure capable of limiting the displacement of the upper beam body of the bridge in the bridge direction needs to be designed and developed, meanwhile, the energy consumption can be buffered in multiple ways, and the self damage of the stop block is reduced while the displacement of the upper beam body is limited greatly.
SUMMERY OF THE UTILITY MODEL
In view of the above defects of the prior art, the utility model designs and develops a collision sliding energy-consuming bridge anti-seismic stop block structure with steel springs, which limits the overlarge displacement between an upper main beam and a lower pier along the bridge upward, and prevents the falling beam of a beam body along the bridge from being damaged by vibration; the collision between adjacent beams at the expansion joint is transferred to a plurality of bridge anti-seismic stop blocks, so that the expansion impact damage at the expansion joint and the local damage of a collision area between adjacent beam bodies are reduced, and the purpose of protecting the expansion joint is achieved; collision positions between the beam body and the stop blocks are increased and dispersed, so that collision force acting on each stop block structure is greatly reduced, and local damage of the stop block structures is reduced; rigid collision between the beam body and the stop block is converted into flexible collision, and seismic energy is consumed more.
In order to realize the utility model discloses a purpose, the utility model discloses a technical scheme do:
the utility model discloses a collision sliding energy-consumption type bridge anti-seismic stop block structure with steel springs, which comprises a steel bracket and a stop block structure, wherein the steel bracket is fixed above the side wall of a pier through a steel bracket side plate bolt; the stop block structure comprises a steel bottom plate, a sliding groove, an impact block, an energy-consumption type low-yield-point steel plate and a double-hemispherical sliding block, the steel bottom plate is fixed at the top of the steel bracket through bolts, the sliding groove is welded on the top surface of the steel bottom plate, the energy-consumption type low-yield-point steel plate is fixed in the middle of the steel bottom plate, steel baffles are welded on the left side and the right side of the steel bottom plate, a sliding groove for sliding the double-hemispherical sliding block is formed between the energy-consumption type low-yield-point steel plate and the steel baffles, and a first steel spring and a second steel spring are respectively connected between the two side walls of the double-hemispherical sliding block and the energy-consumption type low-yield-point steel plate and the steel baffles; the two collision blocks are fixed at the bottom of the second main beam, and when the second main beam moves along the bridge direction, the collision blocks can collide with the double-hemisphere sliding blocks.
The double-hemispherical sliding block consists of a circular truncated cone, an inner hemisphere and an outer hemisphere, the bottom of the circular truncated cone is matched with the bottom of the sliding groove to slide, and the lower parts of the two side walls of the double-hemispherical sliding block are connected with the energy-consuming low-yield-point steel plate and the steel baffle plate through a first steel spring and a second steel spring respectively; the inner hemisphere and the outer hemisphere are respectively fixed above the inner wall and the outer wall of the circular truncated cone; the double-hemisphere-shaped sliding blocks on the two sides are not on the same straight line.
The inner hemisphere is made of steel material; the outer hemisphere is made of rubber materials.
The collision block comprises a steel baffle web plate, steel baffle side plates, a steel baffle top plate and a collision front part, the steel baffle top plate is horizontally arranged and fixed at the bottom of the second main beam through steel baffle bolts, and the vertically arranged steel baffle side plates are fixed at the edge of the lower surface of the steel baffle top plate; two steel baffle webs arranged in parallel are fixed between the steel baffle top plate and the steel baffle side plate, the collision front part is fixed on the inner wall of the steel baffle side plate in an arc-curved-surface structure, and the collision front part is made of rubber materials and can collide with an outer hemisphere.
An expansion joint is formed between the second main beam and the main beam, a bridge movable support arranged on a second support base stone is arranged between the second main beam and the bridge pier, the horizontal sliding distance of the double-hemisphere sliding blocks is smaller than the maximum distance that the bridge movable support can move, and the horizontal sliding distance of the double-hemisphere sliding blocks is smaller than the width of the expansion joint.
The steel corbel comprises a top plate, an inner side plate, a bottom 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; the one end of roof and the top mutually perpendicular of interior plate be connected the one end of bottom plate with the bottom mutually perpendicular of interior plate is connected, the inside wall of web with the outer wall mutually perpendicular of interior plate is connected, its top and bottom respectively with the lower surface of roof and the upper surface of bottom plate link to each other.
And the stop block structures are distributed on one side of the bridge movable support along the transverse bridge direction in a dispersing manner.
The beneficial effects of the utility model reside in that:
1) the utility model discloses can restrict the roof beam body in the same direction as the bridge displacement. Under the effect of seismic waves, the bridge beam body vibrates in the direction of the bridge, in the direction of the transverse bridge and in the vertical direction, collision sliding energy-dissipation type bridge anti-seismic stop blocks are installed near each movable support, the upper beam body can be limited to relatively large displacement in the direction of the bridge by utilizing the sliding of the double-hemisphere sliding blocks after collision with the collision blocks, the support is protected, the beam body is prevented from being damaged in the direction of the bridge by falling the beam and being vertically separated from the warping of the support, and the beam body and the support are prevented from being damaged by vertical collision. The stop blocks are large in number and distributed in mounting positions, seismic force acting on each stop block structure can be effectively reduced, and local damage of the stop blocks and damage of the bottoms of the piers are reduced.
2) The utility model discloses have certain buffering and consume seismic energy's function. When an earthquake occurs, the collision block is driven by the main beam to collide with the double-hemispherical sliding block, and a part of earthquake energy is consumed by utilizing the plastic deformation of the rubber material; the double-hemispherical sliding block slides in the sliding groove to be in contact with the steel spring, consumes part of earthquake energy, and finally collides with the energy-consuming low-yield-point steel plate to consume multiple energy. Under the action of medium and small earthquakes, the energy-consuming type low-yield-point steel plate in the block body of the block is in an elastic stage by small impact force, and the elastic stage is similar to that of a common reinforced concrete block and belongs to rigid impact; however, under the action of a large earthquake, the energy-consuming type low-yield-point steel plate enters a plastic stage due to large collision force, at the moment, the collision belongs to flexible collision, so that the local damage of a collision area and the damage transmitted to the bottom of a pier can be effectively reduced, part of earthquake energy can be consumed by means of plastic deformation of the energy-consuming type low-yield-point steel plate in the block body, and the damage of the earthquake to other components of the bridge is reduced.
3) The utility model has the advantages of low material price, simple structure, convenient construction, easy detection and maintenance, 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 an enlarged view of a portion of FIG. 1;
fig. 4 is a schematic three-dimensional structure of the present invention;
fig. 5 is a schematic top view of the present invention;
FIG. 6 is a schematic structural view of a middle impact mass according to the present invention;
fig. 7 is a schematic structural view of the middle double-hemisphere slider of the present invention.
In the figure: 1 steel corbel, 2 dog structures, 3 steel bottom plates, 4 sliding grooves, 5 double-hemisphere type sliding blocks, 6 first steel springs, 7 second steel springs, 8 collision blocks, 9 collision front parts, 10 energy-consuming low-yield-point steel plates, 11 steel baffle top plates, 12 steel baffle side plates, 13 steel baffle web plates, 14 top plates, 15 inner side plates, 16 web plates, 17 bottom plates, 18 steel corbel side plate bolts, 19 steel bottom plate bolts, 20 steel baffle bolts, 21 main beams, 22 expansion joints, 23 second main beams, 24 bridge fixed supports, 25 bridge support cushion stones, 26 bridge movable supports, 27 second support cushion stones, 28 piers, 51 round tables, 52 inner hemispheres and 53 outer hemispheres.
Detailed Description
The following further description of the present invention:
please refer to fig. 1-7.
The utility model discloses a collision sliding energy-consumption type bridge anti-seismic stop block structure with steel springs, which comprises a steel bracket 1 and a stop block structure 2, wherein the steel bracket 1 is fixed above the side wall of a pier 28 through a steel bracket side plate bolt 18; the stop block structure 2 comprises a steel bottom plate 3, a sliding groove 4, a collision block 8, an energy-consuming type low-yield-point steel plate 10 and a double-hemispherical sliding block 5, wherein the steel bottom plate 3 is fixed at the top of the steel bracket 1 through a bolt 19, the sliding groove 4 is welded on the top surface of the steel bottom plate 3, the energy-consuming type low-yield-point steel plate 10 is fixed at the middle part of the steel bottom plate 3, steel baffles are welded at the left side and the right side, a sliding groove for the sliding of the double-hemispherical sliding block 5 is formed between the energy-consuming type low-yield-point steel plate 10 and the steel baffles, and a first steel spring 6 and a second steel spring 7 are respectively connected between two side walls of the double-hemispherical sliding block 5 and the energy-consuming type low-yield-point steel plate 10 and the steel baffles; the two collision blocks 8 are fixed at the bottom of the second main beam 23, and when the second main beam 23 moves along the bridge direction, the collision blocks 8 can collide with the double-hemisphere sliding blocks 5.
The total number of the steel springs is 4, and 2 of the steel springs are fixedly connected to the energy-consuming type low-yield-point steel plate in a centrosymmetric manner
10 the middle lower parts of the left and right surfaces are provided with first steel springs 6; the rest steel springs are respectively and fixedly connected between the middle lower part of the inner surface of the steel baffle plate and the two side surfaces of the double-hemispherical sliding block 5, and are second steel springs 7.
The double-hemispherical sliding block 5 consists of a circular truncated cone 51, an inner hemisphere 52 and an outer hemisphere 53, the bottom of the circular truncated cone 51 is matched with the bottom of the sliding groove 4 to slide, and the lower parts of the two side walls of the circular truncated cone 51 are connected with the energy-consuming low-yield-point steel plate 10 and the steel baffle plate through a first steel spring 6 and a second steel spring 7 respectively; the inner hemisphere 52 and the outer hemisphere 53 are respectively fixed above the inner wall and the outer wall of the circular truncated cone 51, and the inner hemisphere 52 is made of steel materials; the outer hemisphere 53 is made of rubber material; the two double-hemispherical-shaped sliding blocks 5 are arranged in the sliding groove 4 in a staggered mode, namely not on the same straight line, so that the purpose of utilizing the buffer area of the energy-consuming low-yield-point steel plate 10 to the maximum extent is achieved. Slidable along the rail and in contact with the steel spring.
The distance between the inner hemisphere 52 and the energy-consuming type low-yield-point steel plate 10 is larger than the distance between the inner side surface of the double-hemisphere sliding block 5 and the first steel spring 6.
The collision block 8 comprises a steel baffle web 13, a steel baffle side plate 12, a steel baffle top plate 11 and a collision front part 9, wherein the collision front part 9 is in an arc-shaped curved surface, is made of rubber materials, can collide with a hemisphere on the outer side of the double-hemisphere sliding block 5 to consume energy, and is fixedly connected with the steel baffle side plate 12; the steel baffle top plate 11 is horizontally arranged and fixed at the bottom of the second main beam 23 through a steel baffle bolt 20, and a vertically arranged steel baffle side plate 12 is fixed at the edge of the lower surface of the steel baffle top plate; two steel baffle webs 13 which are arranged in parallel are fixed between the steel baffle top plate 11 and the steel baffle side plate 12 to enhance the stability of the impact block 8.
The energy-consuming type low-yield-point steel plate 10 in the block body 2 can adopt low-yield-point steel with yield point of 160MPa or 100 MPa. The yield strength of the energy-consuming type low-yield-point steel plate 10 is lower than that of steel materials used for the steel corbel 1, the steel bottom plate 3, the impact block 8 and the steel hemisphere except for the energy-consuming type low-yield-point steel plate. The energy-consuming type low-yield-point steel plate 10 can normally consume energy to work by depending on a hysteresis curve of the steel plate.
An expansion joint 22 is formed between the main beam 21 and the second main beam 23, a bridge movable support 26 arranged on a second support cushion 27 is arranged between the second main beam 23 and the pier 28, the horizontal sliding distance of the double-hemisphere sliding block 5 is smaller than the maximum distance of the bridge movable support 26, and the horizontal sliding distance of the double-hemisphere sliding block 5 is smaller than the width of the expansion joint 22.
The steel corbel 1 comprises a top plate 14, an inner side plate 15, a bottom plate 17 and a web plate 16, wherein the inner side plate 15 is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of a pier 28; one end of the top plate 14 is vertically connected with the top of the inner side plate 15, one end of the bottom plate 17 is vertically connected with the bottom of the inner side plate 15, the inner side wall of the web plate 16 is vertically connected with the outer wall of the inner side plate 15, and the top and the bottom of the web plate are respectively connected with the lower surface of the top plate 14 and the upper surface of the bottom plate 17. The steel material selected by the steel bracket 1 can be Q235 steel, Q345 steel, Q390 steel or Q420 steel.
The plurality of block structures 2 are arranged on one side of the bridge movable support 26 along the transverse bridge direction, and the block structures 2 are distributed dispersedly, so that the seismic force acting on each block structure 2 can be effectively reduced, and the damage to the block structures 2 is reduced.
The working principle is as follows: when an earthquake does not occur, the impact block 8, the double-hemispherical slider 5, the first steel spring 6 and the second steel spring 7 are not obviously deformed and are in an initial state. When an earthquake occurs, the second main beam 23 and the pier 28 are relatively displaced along the bridge direction to drive the collision front part 9 of the collision block 8 to collide with the outer hemisphere 53 of the static double-hemisphere slide block 5, and the seismic wave energy is primarily consumed by utilizing the plastic deformation of the rubber material; then the double-hemispherical sliding block 5 slides in the sliding groove 4, compresses the first steel spring 6, stretches the second steel spring 7, and converts part of seismic wave energy into elastic potential energy of the steel spring to perform secondary energy consumption; when the double-hemispherical slide block 5 slides for a certain distance, the double-hemispherical slide block collides with the energy-consuming type low-yield-point steel plate 10 positioned in the middle of the sliding groove 4 for the second time, and the collision is the collision between the inner hemisphere 52 of the double-hemispherical slide block 5 and the energy-consuming type low-yield-point steel plate 10, so that multiple energy consumption is performed.
Under the action of medium and small earthquakes, the energy-consuming type low-yield-point steel plate 10 is in an elastic stage due to small impact force, and the elastic stage is similar to a common reinforced concrete stop block and belongs to rigid impact; however, under the action of a large earthquake, a large collision force can make the energy-consuming type low-yield-point steel plate 10 enter a plasticity stage, and at the moment, the collision belongs to flexible collision, so that the local damage of a collision area can be effectively reduced, and the damage transmitted to the bottom of the pier 28 can be effectively reduced.
In the collision process, the relative displacement of the main beam 21 and the pier 28 of the bridge along the bridge direction can be effectively limited, the movable support 26 is protected from being damaged due to large displacement, and the expansion joint 22 is protected from being damaged due to collision between the main beam 21 of the bridge and the other main beam of the bridge.
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 (7)
1. The utility model provides a collision slip power consumption type bridge antidetonation dog structure with steel spring which characterized in that: the bridge pier structure comprises a steel corbel (1) and a stop block structure (2), wherein the steel corbel (1) is fixed above the side wall of the bridge pier (28) through a steel corbel side plate bolt (18); the stop block structure (2) comprises a steel bottom plate (3), a sliding groove (4), a collision block (8), an energy-consuming type low-yield-point steel plate (10) and a double-hemisphere-shaped sliding block (5), the steel bottom plate (3) is fixed to the top of the steel bracket (1) through a bolt (19), the sliding groove (4) is welded to the top surface of the steel bottom plate (3), the energy-consuming type low-yield-point steel plate (10) is fixed to the middle of the sliding groove, steel baffles are welded to the left side and the right side of the sliding groove, a sliding groove used for sliding the double-hemisphere-shaped sliding block (5) is formed between the energy-consuming type low-yield-point steel plate (10) and the steel baffles, and a first steel spring (6) and a second steel spring (7) are connected between two side walls of the double-hemisphere-shaped sliding block (5) and the energy-consuming type low-yield-point steel plate (10) and the steel baffles respectively; the two collision blocks (8) are fixed at the bottom of the second main beam (23), and when the second main beam (23) moves along the bridge direction, the collision blocks (8) can collide with the double-hemisphere sliding blocks (5).
2. The anti-seismic stop structure for collision sliding energy-consuming type bridges with steel springs according to claim 1, wherein: the double-hemispherical sliding block (5) consists of a circular truncated cone (51), an inner hemisphere (52) and an outer hemisphere (53), the bottom of the circular truncated cone (51) is matched with the bottom of the sliding groove (4) to slide, and the lower parts of the two side walls of the circular truncated cone are connected with the energy-consuming low-yield-point steel plate (10) and the steel baffle plate through a first steel spring (6) and a second steel spring (7) respectively; the inner hemisphere (52) and the outer hemisphere (53) are respectively fixed above the inner wall and the outer wall of the circular truncated cone (51); the double-hemisphere sliding blocks (5) on the two sides are not on the same straight line.
3. The anti-seismic stop structure for collision sliding energy-consuming type bridges with steel springs according to claim 2, wherein: the inner hemisphere (52) is made of steel material; the outer hemisphere (53) is made of rubber material.
4. The anti-seismic stop structure for collision sliding energy-consuming type bridges with steel springs according to claim 3, wherein: the collision block (8) comprises a steel baffle web plate (13), steel baffle side plates (12), a steel baffle top plate (11) and a collision front part (9), the steel baffle top plate (11) is horizontally arranged and fixed at the bottom of the second main beam (23) through steel baffle bolts (20), and the vertically arranged steel baffle side plates (12) are fixed at the edge of the lower surface of the steel baffle top plate; be fixed with two parallel arrangement's steel baffle web (13) between steel baffle roof (11) and steel baffle curb plate (12), collision front portion (9) are the cambered surface structure and are fixed in on the inner wall of steel baffle curb plate (12), collision front portion (9) are made for rubber materials, can collide with outer hemisphere (53) mutually.
5. The anti-seismic stop structure for collision sliding energy-consuming type bridges with steel springs according to claim 4, wherein: form expansion joint (22) between second girder (23) and girder (21), second girder (23) with be equipped with between pier (28) and set up in bridge movable support (26) on second support stone underlay (27), the horizontal sliding distance of two hemisphere type sliders (5) is less than the maximum distance that bridge movable support (26) can remove, the horizontal sliding distance of two hemisphere type sliders (5) is less than the width of expansion joint (22).
6. The anti-seismic stop structure for collision sliding energy-consuming type bridges with steel springs according to claim 5, wherein: the steel corbel (1) comprises a top plate (14), an inner side plate (15), a bottom plate (17) and a web plate (16), wherein the inner side plate (15) is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of the pier (28); the one end of roof (14) and the top mutually perpendicular of interior plate (15) be connected, the one end of bottom plate (17) with the bottom mutually perpendicular of interior plate (15) is connected, the inside wall of web (16) with the outer wall mutually perpendicular of interior plate (15) is connected, its top and bottom respectively with the lower surface of roof (14) and the upper surface of bottom plate (17) link to each other.
7. The anti-seismic stop structure for collision sliding energy-consuming type bridges with steel springs according to claim 6, wherein: the block structures (2) are distributed on one side of the bridge movable support (26) in a scattered manner along the transverse bridge direction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120413024.5U CN215164549U (en) | 2021-02-25 | 2021-02-25 | Collision sliding energy consumption type bridge anti-seismic stop block structure with steel springs |
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| CN202120413024.5U CN215164549U (en) | 2021-02-25 | 2021-02-25 | Collision sliding energy consumption type bridge anti-seismic stop block structure with steel springs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247460A (en) * | 2021-12-23 | 2022-10-28 | 兰州理工大学 | Compound stop device of basis shock insulation |
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2021
- 2021-02-25 CN CN202120413024.5U patent/CN215164549U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115247460A (en) * | 2021-12-23 | 2022-10-28 | 兰州理工大学 | Compound stop device of basis shock insulation |
| CN115247460B (en) * | 2021-12-23 | 2024-02-27 | 兰州理工大学 | Foundation shock insulation composite limiting device |
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