CN111364348B - A multi-damping buffer energy-absorbing bridge seismic stopper structure - Google Patents
A multi-damping buffer energy-absorbing bridge seismic stopper structure Download PDFInfo
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- CN111364348B CN111364348B CN202010175146.5A CN202010175146A CN111364348B CN 111364348 B CN111364348 B CN 111364348B CN 202010175146 A CN202010175146 A CN 202010175146A CN 111364348 B CN111364348 B CN 111364348B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
本发明公开了一种多重阻尼缓冲耗能型桥梁抗震挡块结构，包括钢牛腿、挡块结构、钢挡板和阻尼器结构，所述钢牛腿通过钢牛腿螺栓固定在桥墩侧壁上方；所述挡块结构设置在钢牛腿与主梁之间；四个钢挡板分别通过阻尼器结构与挡块结构的四个侧壁相连；所述阻尼器结构的两端通过阻尼器侧板螺栓分别连接挡块结构与钢挡板。本发明通过多个阻尼器结构和中间的碰撞球共同作用，缓冲消耗地震能量；在横桥向、顺桥向和竖向限制梁体和桥墩之间的位移，有效防止落梁；把桥梁与挡块之间的刚性碰撞转化为此桥梁抗震挡块结构内部的柔性碰撞，把梁体之间的碰撞转移到挡块上，不但减小了地震对桥梁的损伤，也减小了对挡块本身的损伤。
The present invention discloses a multi-damping buffering energy-absorbing bridge seismic stopper structure, including a steel corbel, a stopper structure, a steel baffle and a damper structure, wherein the steel corbel is fixed above the side wall of the pier by a steel corbel bolt; the stopper structure is arranged between the steel corbel and the main beam; four steel baffles are respectively connected to the four side walls of the stopper structure by a damper structure; and the two ends of the damper structure are respectively connected to the stopper structure and the steel baffle by damper side plate bolts. The present invention buffers and consumes earthquake energy through the combined action of multiple damper structures and a collision ball in the middle; limits the displacement between the beam body and the pier in the transverse direction, along the bridge direction and vertically, and effectively prevents the beam from falling; converts the rigid collision between the bridge and the stopper into a flexible collision inside the seismic stopper structure of the bridge, and transfers the collision between the beam bodies to the stopper, which not only reduces the damage to the bridge caused by the earthquake, but also reduces the damage to the stopper itself.
Description
Technical Field
The invention belongs to the technical field of bridge earthquake resistance, and particularly relates to a multi-damping buffering energy-consumption type bridge earthquake resistance stop block structure.
Background
The bridge plays a vital role in transportation, and along with the increasing national requirements on transportation volume, the bridge has been built in large quantities simultaneously with the saving of land resources and the protection of natural environment. The number of bridges which are currently built and established in China is quite considerable, along with the increasing construction quantity of the bridges, the protection and reinforcement work of the bridges is particularly important, particularly, a plurality of areas in China are in earthquake-prone zones, the bridges are damaged by the earthquakes, and the economic losses are huge.
The damage forms of the earthquake to the bridge mainly comprise support damage, beam falling damage, pier pile foundation damage, collision damage among beam bodies and the like, hidden danger is reserved for life safety of people, reconstruction work after damage is difficult and heavy, huge economic loss is brought to filling the gap, and certain protection measures are needed to enable the bridge to have certain earthquake resistance.
In order to achieve the above purpose, most of the places in China adopt measures that reinforced concrete stoppers are arranged on two sides of the top of a bridge pier capping beam in order to limit the larger displacement of the beam body in the transverse direction, however, the defect of the method is obvious that the rigid collision between the beam body and the stoppers easily causes local damage, the stoppers are also huge in damage, and the vertical and forward displacement of the beam body are not too much restrained, so that the risk of falling the beam is still larger.
Aiming at the defects, a novel bridge anti-seismic stop block structure needs to be designed and developed, when an earthquake occurs, the displacement of the upper beam body can be limited in multiple directions, the energy consumption can be effectively buffered, and the stop block is reduced to be damaged when the beam body is limited to be greatly displaced.
Disclosure of Invention
In view of the defects in the prior art, the invention designs and develops a multi-damping buffer energy-consumption type bridge anti-seismic stop block structure, wherein a plurality of damper structures and a collision ball in the middle act together to buffer and consume seismic energy, the displacement between a beam body and a bridge pier is limited in the transverse direction, the forward direction and the vertical direction, the beam falling is effectively prevented, the rigid collision between the bridge and the stop block is converted into the flexible collision in the bridge anti-seismic stop block structure, and the collision between the beam bodies is transferred to the stop block, so that the damage of the earthquake to the bridge is reduced, and the damage to the stop block is reduced.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
The shock-resistant stop block structure of the multi-damping buffering energy-consuming bridge comprises steel corbels, stop block structures, steel baffle plates and damper structures, wherein the steel corbels are fixed above side walls of bridge piers through steel corbel bolts, the stop block structures are arranged between the steel corbels and a main beam, the steel baffle plates are fixed at the bottom of the main beam through steel baffle plate bolts, four steel baffle plates are respectively connected with four side walls of the stop block structures through damper structures, and two ends of the damper structures are respectively connected with the stop block structures and the steel baffle plates through damper side plate bolts.
The steel corbel comprises a steel corbel top plate, steel corbel side plates and steel corbel webs, threaded holes used for the steel corbel bolts to pass through are formed in the steel corbel side plates, two steel corbel webs are vertically fixed below the steel corbel top plate, and the outer walls of the steel corbel side plates are respectively connected with the steel corbel top plate and one side of the steel corbel webs.
The steel base plate is fixed on the upper surface of the steel bracket top plate through a steel base plate bolt, the square stop block is fixed on the middle position of the upper surface of the steel base plate and is of a hollow square structure with an opening at the top, the steel stand column is arranged in the middle of an inner cavity of the square stop block, the top of the steel stand column is fixedly connected with the bottom of the main beam, the steel stand column is of a cylindrical structure, and the collision ball is arranged between the inner wall of the square stop block and the outer wall of the steel stand column, and rubber buffer pads are arranged on the inner wall of the square stop block and the outer wall of the steel stand column.
The steel baffle comprises a steel baffle top plate, a steel baffle side plate and a steel baffle web plate, wherein a plurality of bolt holes are formed in the steel baffle top plate and the steel baffle side plate, the steel baffle top plate is fixed to the bottom of the main beam through steel baffle bolts, the steel baffle top plate is horizontally arranged, the steel baffle side plate which is vertically arranged is fixed to the edge of the lower surface of the steel baffle top plate, two steel baffle web plates which are arranged in parallel are fixed between the steel baffle top plate and the steel baffle side plate, and the longitudinal section of each steel baffle web plate is right trapezoid.
The damper structure comprises a damper main body, a rotary hinge support, a pull-out resistant stop block, a fixed steel plate, a connecting block and damper side plates, wherein the damper main body is a viscous damper, rotary hinge connecting holes are formed in two ends of the damper main body and are respectively hinged with the rotary hinge supports on two sides, the damper side plates on two sides of the damper structure are respectively connected with the square stop block and the steel baffle side plates through damper side plate bolts, the pull-out resistant stop block main body is in an L shape, the tail ends of the pull-out resistant stop block main body are arc-shaped, the two pull-out resistant stop blocks are relatively fixed on the damper side plates, a fixed steel plate and the connecting block are arranged between the two pull-out resistant stop blocks, a gap is formed between the fixed steel plate and the pull-out resistant stop block in a natural state, one side of the connecting block is fixedly connected with the damper side plate, the other side of the connecting block is fixedly connected with the rotary hinge support is transversely connected with the other side of the fixed steel plate, the width of the rotary hinge support is smaller than the tail ends of the two pull-out resistant stop blocks, and the length of the fixed steel plate is larger than the tail ends of the two pull-out resistant stop blocks.
The collision ball is in a sphere structure, a groove which is in a cylinder shape is arranged at the top, the inner diameter of the groove is larger than the outer diameter of the steel upright post, the collision ball is in a free moving state, and the movable distance between the outer side of the collision ball and the square stop block is larger than the movable distance between the inner side of the collision ball and the steel upright post.
The impact ball is polyurethane rubber (UR).
The connecting block is made of low yield strength steel.
The invention has the beneficial effects that:
1) The invention can effectively consume the earthquake energy, reduce the damage of the earthquake to the bridge and the damage of the structure, on one hand, the damper structure is arranged in four directions of the square stop block, not only has the effect of the combined action of multiple damping, consumes most of the earthquake energy, but also reduces the effect of the earthquake to each damper structure, and reduces the damage of the damper structure, in addition, the damper main body adopts a viscous damper, can not provide additional rigidity to the bridge during the earthquake, protects the bridge, on the other hand, the collision ball adopts polyurethane rubber, and can vibrate between the square stop block and the steel upright post during the earthquake, thereby absorbing the earthquake energy.
2) The invention can limit the beam in three directions, effectively prevent the beam from falling, transversely weld a rotary hinged support on a fixed steel plate, leave a certain gap between a damper main body and a pull-out resistant stop block, and can rotate in cooperation with a connecting block to adapt to the relative rotation and vertical relative displacement of the beam body, the square stop block and the steel baffle which are connected with a viscous damper structure are limited in the axial oversized displacement of the damper, and meanwhile, the damper structure is arranged in four directions of the square stop block, so that the invention can limit the relative displacement of the beam body in three directions of the forward direction, the transverse direction and the vertical direction.
3) The invention has low material price, simple structure, convenient construction, easy disassembly and maintenance and repeated use.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a forward layout of the present invention;
FIG. 3 is a schematic view of a damper according to the present invention;
FIG. 4 is a diagram of an operational state of the damper structure of the present invention;
FIG. 5 is a schematic view of a three-dimensional construction of the present invention;
fig. 6 is a schematic top view of the present invention.
In the figure, 1 steel bracket, 2 baffle structure, 3 steel baffle, 4 square baffle, 5 steel upright post, 6 collision ball, 7 steel bottom plate, 8 damper structure, 9 steel bracket top plate, 10 steel bracket side plate, 11 steel bracket web, 12 steel bracket bolt, 13 steel baffle top plate, 14 steel baffle side plate, 15 steel baffle web, 16 steel baffle bolt, 17 steel bottom plate bolt, 18 rubber cushion, 19 damper main body, 20 rotation hinge support, 21 pull-out resistance baffle, 22 fixed steel plate, 23 connecting block, 24 damper side plate, 25 damper side plate bolt, 26 girder, 27 second girder, 28 expansion joint, 29 pier, 30 bridge cradle, 31 bridge fixed support.
Detailed Description
The present invention will be further described below
Please refer to fig. 1-6
The invention discloses a multi-damping buffering energy-consumption bridge anti-seismic stop block structure which comprises a steel bracket 1, a stop block structure 2, steel baffles 3 and a damper structure 8, wherein the steel bracket 1 is fixed above the side wall of a bridge pier 29 through steel bracket bolts 12, the stop block structure 2 is arranged between the steel bracket 1 and a main beam 26, the steel baffles 3 are fixed at the bottom of the main beam 26 through steel baffle bolts 16, four steel baffles 3 are respectively positioned on four sides of the stop block structure 2, two ends of the damper structure 8 are respectively connected with the stop block structure 2 and the steel baffles 3 through damper side plate bolts 25, and the damper structure 8 is arranged in the four directions of the stop block structure 2, so that the invention can limit the relative displacement of a beam body in the directions of a forward bridge direction, a transverse bridge direction and a vertical direction.
The steel corbel 1 is formed by welding a steel corbel top plate 9, steel corbel side plates 10 and steel corbel webs 11, threaded holes for the steel corbel bolts 12 to pass through are formed in the steel corbel side plates 10 so as to fix the steel corbel 1 on the side face of the top of a pier 29 near a movable support 30 of the bridge, two steel corbel webs 11 are welded vertically below one steel corbel top plate 9, one steel corbel side plate 10 is welded laterally, and the positions of the steel corbel top plate, the steel corbel side plates 10 and the steel corbel webs are mutually perpendicular.
The stop block structure 2 comprises a square stop block 4, a steel upright post 5, a collision ball 6 and a steel bottom plate 7. The steel bottom plate 7 is fixed on the upper surface of the steel bracket top plate 9 through a steel bottom plate bolt 17, the square stop block 4 is welded and fixed on the middle position of the upper surface of the steel bottom plate 7, the external shape of the square stop block 4 is a cuboid with equal length and width, and a square groove is formed in the upper portion of the square stop block. The steel upright post 5 is welded and fixed at the bottom of the main beam 26, the position is positioned in the middle of the groove of the square stop block 4, and the cross section of the steel upright post 5 is circular. The collision ball 6 is placed between the square stop 4 and the steel upright 5. A layer of rubber cushion pad 18 is arranged on the inner wall of the groove of the square stop block 4 and the outer wall of the steel upright post 5.
The steel baffle 3 comprises a steel baffle top plate 13, a steel baffle side plate 14 and a steel baffle web plate 15, wherein a plurality of bolt holes are formed in the steel baffle top plate 13 and the steel baffle side plate 14, the steel baffle top plate 13 is fixed at the bottom of a steel baffle 26 through steel baffle bolts 16, a vertical steel baffle side plate 14 is welded at the edge of the lower surface of the horizontal steel baffle top plate 13, two parallel steel baffle web plates 15 are welded between the steel baffle top plate 13 and the steel baffle side plate 14, and the longitudinal section of each steel baffle web plate 15 is in a right trapezoid shape.
The damper structure 8 comprises a damper main body 19, a rotary hinge support 20, a pull-out resistance block 21, a fixed steel plate 22, a connecting block 23 and a damper side plate 24, wherein in order to enable the damper structure 8 to provide larger damping without providing additional rigidity in an earthquake, the damper main body 19 is a viscous damper, rotary hinge connecting holes are formed in two sides of the damper main body 19 and are respectively hinged with the rotary hinge supports 20 on two sides, screw holes are formed in the damper side plate 24, the damper side plates 24 on two sides of the damper structure 8 are respectively connected with the square block 4 and the steel baffle side plate 14 through damper side plate bolts 25, the main body of the pull-out resistance block 21 is in an L shape, the tail ends of the pull-out resistance block 21 are in an arc shape, the two pull-out resistance blocks 21 are oppositely welded on the damper side plate 24, a certain distance is arranged between the fixed steel plate 22 and the pull-out resistance block 21 in a natural state so as to provide a rotary space for the damper main body 19 and the rotary hinge supports 23, one side of the damper side plate 24 is well welded with the two side plates 22 in a transverse direction, and the main body 20 is easily welded to the transverse direction when the two hinge supports 20 are in a transverse direction, and the transverse direction of the main body is not welded to the hinge supports 20 is easily displaced, and the transverse direction is easily welded to the main body 20 is enabled to be deformed when the two sides of the main body is in a transverse direction.
The collision ball 6 is in a sphere shape, a cylindrical groove is formed in the upper portion of the collision ball, the circular radius of the cross section of the opening groove of the collision ball 6 is larger than that of the cross section of the steel upright 5, the collision ball 6 is in a free moving state, and the movable distance between the outer side of the collision ball 6 and the square stop block 4 is larger than that between the inner side of the collision ball and the steel upright 5.
The collision ball 6 is made of polyurethane rubber (UR).
The material used for the connecting block 23 is low yield strength steel, so that the connecting block can be matched with the shape change of the damper structure 8 to generate larger yield deformation during an earthquake, and can be matched with rotation and consume part of earthquake energy.
The working principle is that when an earthquake occurs, the main beam 26 and the bridge pier 29 relatively displace along the bridge direction, the two damper structures 8 positioned along the bridge direction bear axial pulling pressure respectively to generate larger damping, meanwhile, the two damper structures 8 positioned along the transverse bridge direction rotate to provide a certain pulling force effect, thereby limiting the relatively larger displacement of the main beam 26, and simultaneously, a plurality of dampers jointly act to consume a great amount of earthquake energy (the principle is the same when Liang Tiheng bridge directions relatively displace); if the girder 26 and the bridge pier 29 are displaced vertically, the damper main body 19 can rotate together with the connecting block 23 in a matched manner, so that the connecting block is subjected to yielding deformation to consume seismic energy, and the girder 23 is prevented from being displaced relatively vertically due to the limiting effect of the pull-out resistance stop 21, in addition, when the girder 26 and the bridge pier 29 are displaced relatively, the steel upright post 5 and the square stop 4 are driven to displace relatively, so that the collision ball 6 is caused to vibrate in the groove, more seismic energy is absorbed, and the damage of the earthquake to the bridge pier 29 and the girder 26 is reduced. In order to enable the collision ball 6 to absorb more energy during vibration, polyurethane rubber is adopted as a material, and the impact ball has the advantages of good wear resistance, good elasticity and good buffering and damping effects, and a layer of rubber buffer cushion 18 is arranged on the inner wall of the groove of the square stop block 4 and the outer wall of the steel upright 5, so that the collision of the collision ball 6 to the steel upright 5 and the inner wall of the groove of the square stop block 4 is flexible, and damage to the collision ball 6 and the stop block structure 2 is reduced.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes or direct or indirect application in the relevant art utilizing the present specification and drawings are included in the scope of the present invention.
Claims (6)
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| CN202010175146.5A CN111364348B (en) | 2020-03-13 | 2020-03-13 | A multi-damping buffer energy-absorbing bridge seismic stopper structure |
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| CN202010175146.5A CN111364348B (en) | 2020-03-13 | 2020-03-13 | A multi-damping buffer energy-absorbing bridge seismic stopper structure |
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| CN111364348B true CN111364348B (en) | 2025-05-06 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111827086A (en) * | 2020-07-06 | 2020-10-27 | 南昌大学 | A kind of anti-seismic stop block of bridge rotating buffer energy-consuming type along the bridge direction |
| CN111926687A (en) * | 2020-08-20 | 2020-11-13 | 南昌大学 | Friction and spring combined energy consumption type bridge anti-seismic stop block structure |
| CN111926688B (en) * | 2020-08-20 | 2025-05-06 | 南昌大学 | A friction and gravity energy dissipation type bridge seismic stopper and construction method thereof |
| CN113265941A (en) * | 2021-06-09 | 2021-08-17 | 南昌大学 | Anti-seismic stop block structure for limiting bidirectional movement of bridge |
| CN115948976B (en) * | 2022-12-19 | 2023-06-20 | 中交公路规划设计院有限公司 | Longitudinal combined toughness constraint system and method for large-span suspension bridge |
| CN116201040B (en) * | 2023-03-08 | 2025-10-14 | 中国电建集团西北勘测设计研究院有限公司 | A technical implementation method for strengthening and treating in-service bridges |
| CN116607392B (en) * | 2023-04-28 | 2026-01-16 | 中船双瑞(洛阳)特种装备股份有限公司 | Bridge transverse restraint device and restraint method thereof |
| CN116837713B (en) * | 2023-06-29 | 2025-08-26 | 宁夏交通建设股份有限公司 | A metal shock-absorbing damper connection structure |
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| CN212375690U (en) * | 2020-03-13 | 2021-01-19 | 南昌大学 | A Multiple Damping, Buffering, and Energy-consuming Bridge Seismic Block Structure |
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| KR101069541B1 (en) * | 2008-10-28 | 2011-10-05 | 임재성 | Vibration absorbing device |
| JP5454231B2 (en) * | 2010-03-04 | 2014-03-26 | オイレス工業株式会社 | Seismic isolation bridge |
| JP6007153B2 (en) * | 2013-07-12 | 2016-10-12 | 株式会社横河ブリッジ | Vibration control device |
| CN107740626B (en) * | 2017-09-01 | 2019-08-02 | 西安建筑科技大学 | A kind of expansion cross-shaped steel SRC column with multistage composite damper |
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| CN212375690U (en) * | 2020-03-13 | 2021-01-19 | 南昌大学 | A Multiple Damping, Buffering, and Energy-consuming Bridge Seismic Block Structure |
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