阅读说明：本技术 一种连续梁桥用滑动摩擦减震装置 (Sliding friction damping device for continuous beam bridge ) 是由 陈士通 张茂江 支墨墨 逯久喜 赵曼 张耀辉 王金良 马遥 许鑫祥 冯志超 于 2019-11-25 设计创作，主要内容包括：本发明涉及一种连续梁桥用滑动摩擦减震装置,其包括连接装置、锁定装置、滑动摩擦减震装置以及固定装置；连接装置包括顶板以及凹槽,固定装置包括底板以及方形槽；顶板与连续梁桥梁体底部固定,锁定装置顶部设置在凹槽内,锁定装置底部与滑动摩擦减震装置顶部接触,底板与活动墩顶部固定连接,滑动摩擦减震装置设置在方形槽内,滑动摩擦减震装置四周侧面与方形槽内壁之间安装减震弹簧A；本发明结构简单、原理可靠,在地震作用下既可以通过装置本身的耗能作用消耗部分地震能量,又能够充分发挥活动墩抗震潜力,分级、分方向消耗地震能量,改善和提高连续梁桥整体结构的抗震性能,便于推广应用。(The invention relates to a sliding friction damping device for a continuous beam bridge, which comprises a connecting device, a locking device, a sliding friction damping device and a fixing device, wherein the connecting device is arranged on the connecting device; the connecting device comprises a top plate and a groove, and the fixing device comprises a bottom plate and a square groove; the top plate is fixed with the bottom of the continuous beam bridge body, the top of the locking device is arranged in the groove, the bottom of the locking device is in contact with the top of the sliding friction damping device, the bottom plate is fixedly connected with the top of the movable pier, the sliding friction damping device is arranged in the square groove, and a damping spring A is arranged between the peripheral side surface of the sliding friction damping device and the inner wall of the square groove; the device has simple structure and reliable principle, can consume part of earthquake energy through the energy consumption of the device under the earthquake action, can fully exert the earthquake-resistant potential of the movable pier, consumes the earthquake energy in different directions in a grading way, improves and enhances the earthquake-resistant performance of the whole structure of the continuous beam bridge, and is convenient to popularize and apply.)

1. The utility model provides a continuous beam bridge is with slip friction damping device which characterized in that: the device comprises a connecting device (1), a locking device (2), a sliding friction damping device (3) and a fixing device (4); the connecting device (1) comprises a top plate (101) and a groove (102) arranged at the bottom of the top plate (101) along the bridge direction,

the fixing device (4) comprises a bottom plate (401) and a square groove (402) arranged at the top of the bottom plate (401);

the top plate (101) is fixedly connected with the bottom of the continuous beam bridge body, the top of the locking device (2) is arranged in the groove (102), the bottom of the locking device (2) is contacted with the top of the sliding friction damping device (3),

the bottom plate (401) is fixedly connected with the top of the movable pier, the sliding friction damping device (3) is arranged in the square groove (402), and a damping spring A (403) is arranged between the peripheral side face of the sliding friction damping device (3) and the inner wall of the square groove (402).

2. The sliding friction shock-absorbing device for a continuous girder bridge according to claim 1, wherein: the locking device (2) comprises a locking plate body (211) movably arranged in the groove (102) along the bridge direction, locking lugs (212) arranged at the bottom of the locking plate body (211) at intervals along the bridge direction and a slide rail device, and reset support rods (213) are arranged at two ends of the locking plate body (211);

the sliding rail device comprises a connecting plate (223) which is in contact with the top of the sliding friction damping device (3), linear sliding rails (221) which are fixed on the top surface of the connecting plate (223) along the bridge direction and correspond to the grooves (102), locking grooves (222) which are arranged on the top surface of the linear sliding rails (221) at intervals along the bridge direction and are matched with the locking bumps (212), and connecting columns (224) which are fixedly arranged at the bottom of the connecting plate (223);

the linear sliding rail (221) is arranged in the groove (102), the locking lug (212) is in contact with the top surface of the linear sliding rail (221), and the outer side wall of the connecting plate (223) is connected with the inner wall of the square groove (402) through a damping spring B (404);

the horizontal distance between the adjacent locking lug (212) and the central line of the locking groove (222) is slightly larger than the maximum beam pier relative displacement in normal operation.

3. The sliding friction shock-absorbing device for a continuous girder bridge according to claim 2, wherein: the sliding friction damping device (3) comprises a plurality of layers of friction plates (301) and friction holes (302) arranged in the middle of the friction plates (301), the friction plates (301) of each layer are arranged in contact with each other, the friction holes (302) of each layer of friction plates (301) have the same diameter and are communicated with each other, rubber rings (303) are fixedly arranged on the inner walls of the friction holes (302), the inner diameters of the rubber rings (303) of each layer of friction plates (301) are sequentially increased from top to bottom,

the connecting columns (224) are arranged in holes formed by the rubber rings (303) of the friction holes (302);

the outer side wall of each friction plate (301) is connected with the inner wall of the square groove (402) through the damping spring A (403);

the bottom surface of the connecting plate (223) is a rough surface which is contacted with the friction plate (301) of the top layer.

4. The sliding friction shock-absorbing device for a continuous girder bridge according to claim 2, wherein: at recess (102) both ends fixed mounting baffle (103) set up hole of stepping down (104) on baffle (103), baffle (103) set up at the dead plate body of lock (211) both ends, bracing piece (213) that reset pass hole of stepping down (104).

5. The sliding friction shock-absorbing device for a continuous girder bridge according to claim 2, wherein: a partition plate (105) is fixedly arranged on the outer side of the locking lug (212) and on the inner sides of two side walls of the groove (102);

the distance between the partition plates (105) and the top wall of the groove (102) is larger than the thickness of the locking plate body (211), and the gap between the two partition plates (105) is larger than the width of the locking lug (212).

6. The sliding friction shock-absorbing device for a continuous girder bridge according to claim 3, wherein: when the locking device (2) is in an unlocked state during normal operation, the continuous beam bridge body and the movable piers can freely slide, the horizontal distance between the adjacent locking lug (212) and the central line of the locking groove (222) is slightly larger than the maximum beam pier relative displacement during normal operation, and the displacement requirement between the beams and the piers can be met; under the action of a longitudinal earthquake, when the relative displacement between a continuous beam bridge body and a movable pier exceeds the maximum relative displacement of the beam pier in normal operation, a locking plate body (211) slides to enable a locking lug (212) to enter a locking groove (222), a connecting device (1) and a sliding friction damping device (3) are temporarily locked to enable the movable pier and the fixed pier to be stressed cooperatively, at the moment, the connecting device (1) transmits the load transmitted by the beam body to the sliding friction damping device (3) through a locking device (2), a connecting plate (223) of the locking device (2) and a friction plate (301) at the top of the sliding friction damping device (3) slide relatively to each other, a connecting column (224) is driven to extrude a rubber ring (303) in a friction hole (302), the sliding friction damping device (3) is pushed to slide relatively to each friction plate (301), and a damping spring A (403) and a damping spring B (404) are deformed to consume earthquake energy, the protection of the movable pier of the continuous beam bridge is realized;

the inner diameter of the rubber ring (303) of each layer of friction plate (301) is sequentially increased from top to bottom, the connecting column (224) can sequentially push each friction plate (301) and the lower-layer plate body to relatively slide according to the size of earthquake load, so that the sliding friction damping device (3) can consume earthquake energy by using friction under earthquakes of different grades, the movable pier is protected, different connecting rigidity is provided according to the size of the earthquake, the movable pier is temporarily connected with the beam body, and the earthquake-proof potential of the movable pier is fully exerted;

under the action of a transverse earthquake, the load transmitted by the beam body can still be transmitted to the locking device (2) through the connecting device (1), relative sliding is generated between the locking device (2) and the sliding friction damping device (3), so that the damping spring A (403) and the damping spring B (404) deform, and the earthquake energy is consumed;

after the earthquake is ended, the reset stay bar (213) can be lifted to release the locking state of the connecting device (1) and the locking device (2), and the connecting plate (223) in the locking device (2) and each friction plate (301) in the sliding friction damping device (3) can be reset under the action of the restoring force of the damping spring.

Technical Field

The invention relates to a sliding friction damping device for a continuous beam bridge, and belongs to the technical field of seismic isolation and reduction of bridges. When an earthquake happens suddenly, the sliding friction damping device can be activated through displacement to resist the effects of longitudinal earthquake and transverse earthquake, and certain connection rigidity is provided, so that the piers are stressed in a synergic manner, the function of graded energy consumption is achieved, the overall earthquake resistance of the continuous beam structure can be effectively improved, and the device is suitable for earthquake resistance design of various newly-built continuous beam bridge structures and earthquake resistance reinforcement of the existing continuous beam bridge.

Background

In order to meet the displacement requirements caused by the effects of temperature load, creep and the like, each connection of the continuous beam bridge is often only provided with one fixed pier, so that most of the longitudinal earthquake load of the upper structure under the earthquake action is borne by the fixed piers, the earthquake resistance of the fixed piers cannot meet the earthquake resistance requirement easily, and the longitudinal earthquake displacement response of the continuous beam bridge is large, so that the expansion joint and the support are easily damaged. The state of independent stress of the fixed piers is changed, the anti-seismic potential of the movable piers is fully exerted, the movable piers and the fixed piers are enabled to act synergistically to participate in anti-seismic, and the method is an effective method for reducing the seismic response of the continuous beam. However, the existing connecting devices for locking the movable piers and the beam body have some problems, for example, the Lock-up device, the locking pin device and the like can realize the locking function of the movable piers and the beam body, but have no energy consumption function, all seismic loads must be borne by the original continuous beam structure, the movable piers of the continuous beam bridge are mostly long and thin piers, the borne seismic loads are limited, and the movable piers are extremely easy to damage in the seismic process.

Disclosure of Invention

The invention aims to solve the technical problem of providing a sliding friction damping device for a continuous beam bridge, which can consume part of earthquake energy through the energy consumption of the device and can fully exert the earthquake-resistant potential of a movable pier in earthquake burst.

The invention adopts the following technical scheme:

the invention comprises a connecting device, a locking device, a sliding friction damping device and a fixing device; the connecting device comprises a top plate and a groove arranged at the bottom of the top plate along the bridge direction, and the fixing device comprises a bottom plate and a square groove arranged at the top of the bottom plate; the top plate is fixedly connected with the bottom of the continuous beam bridge body, the top of the locking device is arranged in the groove, the bottom of the locking device is in contact with the top of the sliding friction damping device, the bottom plate is fixedly connected with the top of the movable pier, the sliding friction damping device is arranged in the square groove, and damping springs A are arranged between the peripheral side face of the sliding friction damping device and the inner wall of the square groove.

The locking device comprises a locking plate body movably arranged in a groove along the bridge direction, locking lugs arranged at the bottom of the locking plate body at intervals along the bridge direction and a sliding rail device, wherein two ends of the locking plate body are provided with reset supporting rods; the sliding rail device comprises a connecting plate which is in contact with the top of the sliding friction damping device, linear sliding rails which are fixed on the top surface of the connecting plate along the bridge direction and correspond to the grooves, locking grooves which are arranged on the top surface of the linear sliding rails at intervals along the bridge direction and are matched with the locking lugs, and connecting columns which are fixedly arranged at the bottom of the connecting plate; the linear slide rail is arranged in the groove, the locking lug is in contact with the top surface of the linear slide rail, and the outer side wall of the connecting plate is connected with the inner wall of the square groove through a damping spring B; the horizontal distance between the adjacent locking convex blocks and the central line of the locking groove is slightly larger than the maximum beam pier relative displacement in normal operation.

The sliding friction damping device comprises a plurality of layers of friction plates and friction holes arranged in the middle of the friction plates, wherein the friction plates of each layer are arranged in a contact manner, the friction holes of each layer of friction plate have the same diameter and are communicated, rubber rings are fixedly arranged on the inner walls of the friction holes, the inner diameters of the rubber rings of each layer of friction plate are sequentially increased from top to bottom, and connecting columns are arranged in holes formed by the rubber rings of each friction hole; the outer side wall of each friction plate is connected with the inner wall of the square groove through the damping spring A; the bottom surface of the connecting plate is a rough surface which is contacted with the friction plate of the top layer.

The two ends of the groove are fixedly provided with the baffle plates, the baffle plates are provided with the abdicating holes, the baffle plates are arranged at the two ends of the locking plate body, and the reset supporting rod penetrates through the abdicating holes.

The invention is positioned outside the locking lug and fixedly provided with a clapboard on the inner side of two side walls of the groove; the distance between the partition board and the top wall of the groove is greater than the thickness of the locking board body, and the gap between the two partition boards is greater than the width of the locking lug.

When the locking device is in an unlocked state during normal operation, the continuous beam bridge body and the movable piers can freely slide, the horizontal distance between the adjacent locking convex blocks and the central line of the locking groove is slightly larger than the maximum beam pier relative displacement during normal operation, and the displacement requirement between the beams and the piers can be met; under the action of a longitudinal earthquake, when the relative displacement of the continuous beam bridge body and the movable pier exceeds the maximum relative displacement of the beam pier in normal operation, the locking plate body slides to enable the locking lug to enter the locking groove, the connecting device and the sliding friction damping device are temporarily locked to enable the movable pier and the fixed pier to be stressed cooperatively, at the moment, the connecting device transmits the load transmitted by the beam body to the sliding friction damping device through the locking device, relative sliding is generated between a connecting plate of the locking device and a friction plate at the top of the sliding friction damping device to drive a connecting column to extrude a rubber ring in a friction hole, relative sliding is generated between the friction plate bodies of the sliding friction damping device to enable a damping spring A and a damping spring B to deform to consume earthquake energy, and the protection of the movable pier of the continuous beam bridge is realized; the inner diameter of the rubber ring of each layer of friction plate is sequentially increased from top to bottom, the connecting column can sequentially push each friction plate and the lower layer plate body to relatively slide according to the size of earthquake load, so that the sliding friction damping device can consume earthquake energy by friction under earthquakes of different grades, protect the movable pier, and provide different connecting rigidity according to the size of the earthquake to temporarily connect the movable pier with the beam body, so that the earthquake-resistant potential of the movable pier is fully exerted; under the action of a transverse earthquake, the load transmitted by the beam body can still be transmitted to the locking device through the connecting device, and relative sliding is generated between the locking device and the sliding friction damping device, so that the damping spring A and the damping spring B deform, and the earthquake energy is consumed; after the earthquake is finished, the reset stay bar can be lifted to release the locking state of the connecting device and the locking device, and the connecting plate in the locking device and each friction plate in the sliding friction damping device can be reset under the restoring force action of the damping spring.

The invention has the following positive effects: the horizontal distance between the adjacent locking convex blocks and the central line of the locking groove is slightly larger than the maximum beam pier relative displacement during normal operation, so that the normal operation of the continuous beam bridge is ensured; the reset support rod unlocks the locking plate body for resetting after an earthquake; the distance between the partition boards and the top wall of the groove is greater than the thickness of the locking board body, and the gap between the two partition boards is greater than the width of the locking lug, so that the locking board body slides to drive the locking lug to enter the locking groove under the action of an earthquake, and the locking function is realized; the baffle prevents that the dead plate body roll-off recess of lock.

When the relative displacement of the continuous beam bridge body and the movable pier exceeds the maximum beam pier relative displacement during normal operation, the locking plate body slides to enable the locking lug to enter the locking groove, the connecting device and the sliding friction damping device are temporarily locked to enable the movable pier and the fixed pier to be stressed cooperatively, the seismic load transmitted by the upper beam body is transmitted to the sliding friction damping device, relative sliding is generated between the connecting plate and a friction plate at the top of the sliding friction damping device, the connecting cylinder is driven to extrude the rubber ring to push the friction plates to generate relative sliding, the damping spring is deformed, partial seismic energy is consumed, the seismic load born by the movable pier is reduced, and the movable pier is protected; the inner diameter of the rubber ring of each layer of friction plate is sequentially increased from top to bottom, and the connecting column can sequentially push each friction plate and the friction plate below the friction plate to relatively slide according to the size of an earthquake load, so that the sliding friction damping device can consume earthquake energy under earthquakes of different grades, effectively protect the movable pier, provide different connecting rigidity according to the size of the earthquake, and temporarily connect the movable pier with the beam body, so that the earthquake-resistant potential of the movable pier is fully exerted; under the action of a transverse earthquake, namely along the width direction of the bridge, the load transmitted by the beam body can still be transmitted to the locking device through the connecting device, so that relative sliding is generated between the locking device and the sliding friction device, the sliding friction device is activated, and the earthquake energy is consumed.

The device has simple structure and reliable principle, can consume part of seismic energy through the energy consumption of the device under the action of an earthquake, can fully exert the seismic potential of the movable pier, consumes the seismic energy in different directions in a grading way, improves and improves the seismic performance of the whole structure of the continuous beam bridge, can be used for seismic design of a newly-built continuous beam bridge and seismic reinforcement of the existing continuous beam bridge, and is convenient to popularize and apply.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the assembly structure of the groove and the partition board of the present invention;

FIG. 3 is a schematic view of an assembly structure of a linear slide rail and a connecting plate according to the present invention;

FIG. 4 is a schematic view of an assembly structure of a friction hole and a rubber ring according to the present invention;

FIG. 5 is a schematic view of the assembly structure of the friction plate and the square groove of the present invention;

fig. 6 is a schematic structural diagram of the working state of the present invention.

In the drawings: 1, connecting devices, 101 top plates, 102 grooves, 103 baffles, 104 abdicating holes and 105 clapboards;

2, a locking device, 211 locking plate bodies, 212 locking lugs, 213 resetting support rods, 221 linear slide rails, 222 locking grooves, 223 connecting plates and 224 connecting columns;

3 sliding friction damping device, 301 friction plate, 302 friction hole, 303 rubber ring;

4 fixing device, 401 bottom plate, 402 square groove, 403 damping spring A and 404 spring B.

Detailed Description

As shown in fig. 1-6, the present invention comprises a connecting device 1, a locking device 2, a sliding friction damping device 3 and a fixing device 4; the connecting device 1 comprises a top plate 101 and a groove 102 arranged at the bottom of the top plate 101 along the bridge direction, and the fixing device 4 comprises a bottom plate 401 and a square groove 402 arranged at the top of the bottom plate 401; the top plate 101 is fixedly connected with the bottom of the continuous beam bridge body, the top of the locking device 2 is arranged in the groove 102, the bottom of the locking device 2 is in contact with the top of the sliding friction damping device 3, the bottom plate 401 is fixedly connected with the top of the movable pier, the sliding friction damping device 3 is arranged in the square groove 402, and damping springs A403 are arranged between the peripheral side face of the sliding friction damping device 3 and the inner wall of the square groove 402. At recess 102 both ends fixed mounting baffle 103 set up the hole of stepping down 104 on the baffle 103, baffle 103 sets up at the dead plate body 211 both ends of lock, and the bracing piece 213 that resets passes the hole of stepping down 104.

The locking device 2 comprises a locking plate body 211 movably arranged in the groove 102 along the bridge direction, locking lugs 212 arranged at the bottom of the locking plate body 211 at intervals along the bridge direction and a sliding rail device, wherein two ends of the locking plate body 211 are provided with reset supporting rods 213; after the earthquake is finished, the reset stay bar 213 can be lifted to release the locking state of the connecting device 1 and the locking device 2, and the clapboards 105 are fixedly arranged on the outer side of the locking lug 212 and on the inner walls of the two sides of the groove 102; the distance between the partition 105 and the top wall of the groove 102 is greater than the thickness of the locking plate body 211, and the gap between the two partitions 105 is greater than the width of the locking projection 212.

The slide rail device comprises a connecting plate 223 contacted with the top of the sliding friction damping device 3, a linear slide rail 221 fixed on the top surface of the connecting plate 223 along the bridge direction and corresponding to the groove 102, locking grooves 222 arranged on the top surface of the linear slide rail 221 along the bridge direction at intervals and matched with the locking bumps 212, and a connecting column 224 fixedly arranged at the bottom of the connecting plate 223; the linear sliding rail 221 is arranged in the groove 102, the locking lug 212 is in contact with the top surface of the linear sliding rail 221, and the outer side wall of the connecting plate 223 is connected with the inner wall of the square groove 402 through a damping spring B404; the horizontal distance between the adjacent locking projection 212 and the central line of the locking groove 222 is slightly larger than the maximum beam pier relative displacement in normal operation, so as to ensure the normal operation of the continuous beam bridge.

The sliding friction damping device 3 comprises a plurality of layers of friction plates 301 and friction holes 302 arranged in the middle of the friction plates 301, wherein the friction plates 301 of each layer are arranged in a contact manner, the friction holes 302 of each layer of friction plate 301 have the same diameter and are communicated, the circle centers of the friction holes 302 are coaxial, rubber rings 303 are fixedly arranged on the inner walls of the friction holes 302, the inner diameters of the rubber rings 303 of each layer of friction plate 301 are sequentially increased from top to bottom, and connecting columns 224 are arranged in holes formed by the rubber rings 303 of each friction hole 302; the gap between each layer of rubber ring 303 and the side wall of the connecting column 224 is gradually increased from top to bottom, and the function of graded energy consumption is realized; the upper surface and the lower surface of each friction plate 301 are rough surfaces, the friction plates 301 rub with each other, and the outer side of each friction plate 301 is connected with the inner wall of the square groove 402 through the damping spring A403; the bottom surface of the coupling plate 223 is a rough surface, which is in contact with the friction plate 301 of the top layer. The damping springs 403 are all in a free length state to exert the maximum energy consumption capacity when the damping springs are deformed; the two ends of each spring are connected by hook rings to meet the displacement requirement of the springs at the periphery.

During normal operation, the locking device 2 is in an unlocked state, the continuous beam bridge body and the movable piers can freely slide, the horizontal distance between the central lines of the adjacent locking lugs 212 and the locking grooves 222 is slightly larger than the maximum beam pier relative displacement during normal operation, and the requirement of displacement between the beams and the piers can be met; under the action of a longitudinal earthquake, when the relative displacement of the continuous beam bridge body and the movable pier exceeds the maximum relative displacement of the beam pier in normal operation, the locking plate body 211 slides to enable the locking lug 212 to enter the locking groove 222, the connecting device 1 and the sliding friction damping device 3 are temporarily locked, the movable pier and the fixed pier are cooperatively stressed, at the moment, the load transmitted by the beam body is transmitted to the sliding friction damping device 3 through the locking device 2 by the connecting device 1, relative sliding is generated between the connecting plate 223 of the locking device 2 and the friction plate 301 at the top of the sliding friction damping device 3, the connecting post 224 is driven to extrude the rubber ring 303 in the friction hole 302, the friction plates 301 of the sliding friction damping device 3 are pushed to relatively slide, the damping spring A403 and the damping spring B404 are deformed to consume earthquake energy, and the protection of the movable pier of the continuous beam bridge is realized; the inner diameter of the rubber ring 303 of each layer of the friction plate 301 is sequentially increased from top to bottom, the connecting column 224 can sequentially push each friction plate 301 and the lower layer plate body to relatively slide according to the size of an earthquake load, so that the sliding friction damping device 3 can consume earthquake energy by using friction under earthquakes of different grades to protect the movable pier, and different connecting rigidity is provided according to the size of the earthquake to temporarily connect the movable pier and the beam body, so that the earthquake-proof potential of the movable pier is fully exerted; under the action of a transverse earthquake, the load transmitted by the beam body can still be transmitted to the locking device 2 through the connecting device 1, and relative sliding is generated between the locking device 2 and the sliding friction damping device 3, so that the damping spring A403 and the damping spring B404 are deformed, and the earthquake energy is consumed; after the earthquake is finished, the reset stay rod 213 can be lifted to release the locking state of the connecting device 1 and the locking device 2, and the connecting plate 223 in the locking device 2 and each friction plate 301 in the sliding friction damping device 3 can be reset under the action of the restoring force of the damping spring.

The device has simple structure and reliable principle, can consume part of seismic energy through the energy consumption effect of the device, can fully play the seismic potential of the movable pier, consumes the seismic energy in stages and directions, improves the seismic performance of the whole structure of the continuous beam bridge, can be used for seismic design of a newly-built continuous beam bridge and seismic reinforcement of the existing continuous beam bridge, and is convenient to popularize and apply.