Bridge vibration / seismic reduction system and method

Abstract

The invention discloses a bridge vibration / seismic reduction system which comprises a viscous damper and a mild steel damper, the vibration / seismic reduction direction of the viscous damper is arranged in the longitudinal direction of a bridge, the mild steel damper is installed on a first bridge structure, one end of a cylinder barrel of the viscous damper is connected with a second bridge structure, and a horizontal sliding groove extending in the longitudinal direction of the bridge is formed in the first bridge structure. A first sliding piece and a second sliding piece which can independently slide are slidably installed in the horizontal sliding groove in a matched mode, the other end of the cylinder barrel is fixedly connected with the first sliding piece, a piston rod of the viscous damper is fixedly connected with the second sliding piece, and the second sliding piece is connected with an upper cover plate of the mild steel damper. A locking assembly for locking the relative positions of the first sliding piece and the second sliding piece is further arranged between the first sliding piece and the second sliding piece. The displacement value of the upper cover plate of the mild steel damper is adopted as a locking control index, the locking time is accurate, and switching of the working state of the viscous damper and the working state of the mild steel damper is accurately achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge structure vibration reduction / seismicity reduction, and in particular relates to a bridge vibration reduction / seismicity reduction system and method. Background Art

[0002] In order to achieve vibration control of long-span bridges, the inventor's previous patent CN111749120B disclosed a bridge shock absorption method. This patent uses a shear pin on the outside of the viscous damper to achieve locking of the viscous damper under the action of a large earthquake. The shearing of the shear pin is used to control the damper locking component to complete the locking of the viscous damper. However, the above patent still has the following shortcomings: (1) It is necessary to consider shearing. The processing accuracy and material uncertainty of the pin that plays a controlling role in the assembly will cause an error between the pin shear force and the design value. (2) Under the action of the normal use stage, the pin will be subjected to many cycles, and a certain amount of damage will accumulate inside, which will make the pin shear force less than the design value, resulting in inaccurate locking timing.

[0003] In summary, there is an urgent need to develop a bridge vibration reduction / seismic system and method that has accurate locking timing and is easy to repair and replace. Summary of the invention

[0004] To this end, the present invention provides a bridge vibration reduction / seismic system and method, which uses the upper cover plate displacement value of the mild steel damper as a locking control index, has accurate locking timing, and can accurately realize the switching of the working states of the viscous damper and the mild steel damper.

[0005] To this end, the bridge vibration reduction / vibration system provided by the present invention comprises a viscous damper and a mild steel damper arranged along the longitudinal direction of the bridge in the vibration reduction / vibration direction, the mild steel damper is installed on the first bridge structure, one end of the cylinder of the viscous damper is connected to the second bridge structure, a horizontal slide groove extending along the longitudinal direction of the bridge is installed on the first bridge structure, a first sliding member and a second sliding member that can slide independently of each other are matched and slidably installed in the horizontal slide groove, the other end of the cylinder is fixedly connected to the first sliding member, the piston rod of the viscous damper is fixedly connected to the second sliding member, the second sliding member is connected to the upper cover plate of the mild steel damper, and a locking component for locking the relative positions of the first sliding member and the second sliding member is also provided between the first sliding member and the second sliding member; The locking assembly comprises a locking slot provided on the first sliding member, a transverse sliding cavity provided on the second sliding member, a locking bolt slidably mounted in the transverse sliding cavity, and a locking assembly for locking or unlocking the locking bolt, wherein a first elastic element is connected between the locking bolt and the transverse sliding cavity; Among them, the locking assembly is linked with the second sliding member. When the second sliding member slides a set distance, the locking assembly unlocks the locking pin under the drive of the second sliding member. The locking pin is matched and inserted into the locking slot under the action of the elastic force provided by the first elastic element, thereby fixing the relative positions of the first sliding member and the second sliding member.

[0006] Specifically, the locking assembly includes a locking plug and a lifting guide column that moves synchronously with the second sliding member, the second bridge structure is provided with a slideway extending along the longitudinal direction of the bridge, the top wall of the transverse sliding cavity is provided with a first slot, the locking pin is provided with a second slot, the locking plug is matched and slidably arranged in the first slot, and the lower end is inserted into the second slot, the second sliding member is provided with a vertically extending lifting guide sleeve, the lifting guide column is matched and slidably installed in the lifting guide sleeve, the bottom of the lifting guide column is provided with a caster, a second elastic element is connected between the lifting guide sleeve and the lifting guide column, the extension direction of the first slot is parallel to the moving direction of the lifting guide column, and the locking plug is fixedly connected to the lifting guide column; wherein, The slide is low in the middle and high at both ends. When the second sliding member drives the lifting guide column to move from the middle to the end of the slide along the longitudinal direction of the bridge, the caster slides closely against the sliding bottom surface of the slide under the elastic force provided by the second elastic element, and drives the lifting guide column to be continuously lifted under the pushing action of the sliding bottom surface, so that the locking block is withdrawn from the second slot, thereby unlocking the locking pin.

[0007] Specifically, the slideway includes a middle horizontal section and inclined upward sections connected to both sides of the middle horizontal section.

[0008] Specifically, a plurality of locking slots are arranged side by side along the longitudinal direction of the bridge on the first sliding member, and the length of the middle horizontal section is adjustable.

[0009] Specifically, the slide also includes a side horizontal section connected to the outer side of the inclined upward section. The second sliding member is provided with a guide column locking assembly for locking the position of the lifting guide column. The guide column locking assembly includes a spring pin arranged on the second sliding member and abutting against the lifting guide column, and a socket arranged on the lifting guide column. When the caster slides to the side horizontal section, the socket of the lifting guide column is aligned with the spring pin, and the spring pin is inserted into the socket under the action of elastic force to lock the lifting guide column.

[0010] Specifically, the first sliding member is provided with a guide hole, and the second sliding member is provided with a guide column that is matched and slidably installed in the guide hole, and the extension direction of the guide hole is parallel to the horizontal sliding groove.

[0011] Specifically, a rigid support is provided on the second bridge structure, and the cylinder is hinged to the rigid support via a latch.

[0012] Specifically, the second sliding member is hinged to the connecting plate on the upper cover plate through a latch.

[0013] Specifically, the first bridge structure is a main beam, and the second bridge structure is an abutment.

[0014] The present invention also provides a bridge vibration reduction / seismic method. When the bridge is under the normal use load range and the action of a small earthquake, the second bridge structure transmits the load action to the viscous damper, and the viscous damper transmits the load action to the upper cover plate of the mild steel damper through the piston rod. The upper cover plate transmits the force to the lower bottom plate through the shock absorbing tenon of the mild steel damper, and then transmits the force to the first bridge structure. In this process, the mild steel damper does not consume energy, but only plays the role of transmitting force to the first bridge structure. The piston rod of the viscous damper performs telescopic movement under the action of external force, and the viscous damper plays the role of vibration reduction / seismic energy consumption. When the bridge is subjected to a major earthquake or exceeds the normal load range of the bridge, the upper cover of the mild steel damper is subjected to a large load, and the shock-absorbing tenon of the mild steel damper undergoes a large deformation. When the displacement of the upper cover of the mild steel damper reaches a preset displacement value, that is, when the second sliding member slides a set distance, the locking assembly linked thereto unlocks the locking pin, and the locking pin is inserted into the locking slot to lock the relative position of the first sliding member and the second sliding member. At this time, the viscous damper is equivalent to a rigid connecting rod that fixes the second bridge structure to the upper cover. The mild steel damper dissipates energy through the yield deformation of the steel to resist the effects of a major earthquake.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The locking structure of the viscous damper uses the design displacement value of the upper cover plate of the mild steel damper relative to the lower base plate as the locking control index. The locking pin plays a force transmission role but not a shear control role. This avoids the phenomenon that when using shear pins, there is an error between the shear force of the pin and the design value due to processing accuracy, material uncertainty and pin fatigue damage, making the locking trigger timing more accurate.

[0016] (2) To restore a bridge after an earthquake, the system can be used again for earthquake resistance by simply replacing the soft steel damper and resetting the locking pin, which greatly improves the efficiency and convenience of maintenance work and has broad prospects for practical engineering applications.

[0017] (3) The present invention realizes the protection of the viscous damper. When a large earthquake occurs, the combined system triggers the locking function, causing the viscous damper to stop working and the mild steel damper to play a vibration reduction / seismic role, thereby realizing the protection of the viscous damper. The combined system switches between the viscous damper and the mild steel damper, so that the vibration reduction / seismic capabilities of the two dampers are fully utilized, thereby reducing the cost of bridge vibration reduction / seismic.

[0018] (4) In actual projects, the locking structure is assembled in the factory in advance, and the connection and anchoring of the components in the combined system can be carried out at the project site. The installation process is more convenient and the installation time is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is the overall structural diagram of the bridge vibration reduction / seismic system; Figure 2 It is a stereogram of the vibration reduction / seismic system of the bridge; Figure 3 It is the front view of the bridge vibration reduction / seismic system; Figure 4 is a schematic diagram of a state in which the first sliding member and the second sliding member are not locked; Figure 5 is a schematic diagram showing a state in which the first sliding member and the second sliding member are locked; Figure 6 It is a schematic diagram of the disassembly of the locking latch and the lateral sliding cavity; Figure 7 3D disassembly diagram of the vertical lifting system; Wherein: 1. viscous damper; 101. cylinder; 102. piston rod; 2. mild steel damper; 201. upper cover plate; 202. damping tenon; 203. lower bottom plate; 3. first bridge structure; 4. horizontal slide; 401. bottom plate; 402. side plate; 5. connecting assembly; 6. first sliding member; 7. second sliding member; 8. locking assembly; 9. locking slot; 10. transverse sliding cavity; 11. locking pin; 12. first elastic element; 13. Locking block; 14. Lifting guide column; 15. Slide; 16. First slot; 17. Second slot; 18. Lifting guide sleeve; 19. Caster; 20. Second elastic element; 21. Middle horizontal section; 22. Inclined upward section; 23. Side horizontal section; 24. Spring latch; 25. Socket; 26. Guide hole; 27. Guide column; 28. Rigid support; 29. ​​Connecting plate; 30. Vertical lifting system; 31. Second bridge structure. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] See also Figure 1-Figure 3A bridge vibration reduction / vibration system includes a viscous damper 1 and a mild steel damper 2 arranged along the longitudinal direction of the bridge in the vibration reduction / vibration direction. The mild steel damper 2 is installed on a first bridge structure 3. A horizontal slide 4 extending along the longitudinal direction of the bridge is installed on the first bridge structure 3. The viscous damper 1 and the mild steel damper 2 are connected by a connecting component 5 slidably installed in the horizontal slide 4. The connecting component 5 includes a first sliding member 6 and a second sliding member 7 matched and slidably installed in the horizontal slide 4. One end of the cylinder 101 of the viscous damper 1 is connected to the second bridge structure 31, and the other end is fixedly connected to the first sliding member 6. Then, the piston rod 102 of the viscous damper 1 is fixedly connected to the second sliding member 7, the second sliding member 7 is connected to the upper cover plate 201 of the mild steel damper 2, and a locking component 8 is also provided between the first sliding member 6 and the second sliding member 7 to lock the relative positions of the two; when the locking component 8 is in the locked position, the relative positions of the first sliding member 6 and the second sliding member 7 are fixed, the first sliding member 6 and the second sliding member 7 can only slide synchronously in the horizontal slide groove 4, but cannot slide independently of each other, and when the locking component 8 is in the unlocked position, the first sliding member 6 and the second sliding member 7 can slide independently of each other in the horizontal slide groove 4.

[0025] See also Figure 4 and Figure 5 Specifically, the locking assembly 8 includes a locking slot 9 arranged on the first sliding member 6, a transverse sliding cavity 10 arranged on the second sliding member 7, a locking pin 11 slidably installed in the transverse sliding cavity 10, and a locking assembly for locking or unlocking the locking pin 11, and a first elastic element 12 is connected between the locking pin 11 and the transverse sliding cavity 10; wherein, the locking assembly is linked with the second sliding member 7, and when the second sliding member 7 slides a set distance, the locking assembly unlocks the locking pin 11 under the drive of the second sliding member 7, and the locking pin 11 is matched and inserted into the locking slot 9 under the action of the elastic force provided by the first elastic element 12, thereby fixing the relative positions of the first sliding member 6 and the second sliding member 7.

[0026] See also Figure 3-Figure 5 When the bridge vibration / seismic reduction system is used for bridge vibration / seismic reduction, when the bridge is in the normal service load range and under the action of a small earthquake, the second bridge structure transfers the load to the viscous damper, and the viscous damper transfers the load to the upper cover plate 201 of the mild steel damper 2 through the piston rod 102, and the upper cover plate 201 transfers the force to the lower bottom plate 203 through the shock absorbing tenon 202 of the mild steel damper 2, and then transfers the force to the first bridge structure 3. In this process, the mild steel damper 2 does not consume energy, but only plays the role of transmitting force to the first bridge structure 3. The piston rod 102 of the viscous damper undergoes telescopic movement under the action of external force, and the viscous damper plays the role of vibration / seismic energy consumption; When the bridge is subjected to a major earthquake or exceeds the normal load range of the bridge, the upper cover plate 201 of the mild steel damper 2 is subjected to a large load, and the shock absorbing tenon 202 of the mild steel damper 2 undergoes a large deformation. When the displacement of the upper cover plate 201 of the mild steel damper 2 reaches a preset displacement value, that is, when the second sliding member 7 slides a set distance, the locking assembly linked thereto unlocks the locking pin 11, and the locking pin 11 is inserted into the locking slot 9 to lock the relative positions of the first sliding member 6 and the second sliding member 7. At this time, the viscous damper is equivalent to a rigid connecting rod that fixes the second bridge structure to the upper cover plate 201. The mild steel damper 2 dissipates energy through the yield deformation of the steel to resist the action of a major earthquake.

[0027] The locking structure of the viscous damper 1 of the present invention adopts the design displacement value of the upper cover plate 201 of the mild steel damper 2 relative to the lower base plate 203 as the locking control index. The locking pin 11 plays a force transmission role but does not play a shear control role. This avoids the phenomenon that when a shear pin is used, there is an error between the shear force of the pin and the design value due to processing accuracy, material uncertainty and pin fatigue damage, thereby making the locking trigger timing more accurate.

[0028] See also Figure 4-Figure 7 In some embodiments, the locking assembly includes a locking plug 13 and a vertical lifting system 30 that moves synchronously with the second sliding member 7. The vertical lifting system 30 includes a lifting guide column 14 and a lifting guide sleeve 18. The second bridge structure is provided with a slideway 15 extending along the longitudinal direction of the bridge. The top wall of the transverse sliding cavity 10 is provided with a first slot 16. The locking pin 11 is provided with a second slot 17 aligned with the first slot 16. The locking plug 13 is matched and slidably arranged in the first slot 16, and the lower end is inserted into the second slot 17, so that the lock The fixed plug 13 is locked in the transverse sliding cavity 10. At this time, the position of the locking plug 13 in the transverse sliding cavity 10 is fixed. A vertically extending lifting guide sleeve 18 is provided on the second sliding member 7. The lifting guide column 14 is matched and slidably installed in the lifting guide sleeve 18. The extension direction of the first slot 16 is parallel to the moving direction of the lifting guide column 14. A caster 19 is provided at the bottom of the lifting guide column 14. A second elastic element 20 is connected between the lifting guide sleeve 18 and the lifting guide column 14. The locking plug 13 is fixedly connected to the lifting guide column 14; wherein, The slide 15 is low in the middle and high at both ends. When the locking plug 13 is locked, the caster 19 is located at the middle low point of the slide 15. When the second sliding member 7 drives the lifting guide column 14 to move along the longitudinal direction of the bridge from the middle low point of the slide 15 to the high point of the end, the caster 19 slides close to the sliding bottom surface of the slide 15 under the elastic force provided by the second elastic element 20. As the sliding bottom surface continues to rise, the caster 19 drives the lifting guide column 14 to be continuously lifted under the pushing action of the sliding bottom surface, so that the locking plug 13 withdraws from the second slot 17, thereby unlocking the locking pin 11. When the locking pin 11 is unlocked, the locking pin 11 is driven by the first elastic element 12 to partially extend from the transverse sliding cavity 10 and insert into the locking slot 9, thereby consolidating the first sliding member 6 and the second sliding member 7. As for the locking timing of the first sliding member 6 and the second sliding member 7, technicians in this field can make adaptive choices based on the design displacement values ​​of the upper cover plate 201 relative to the lower base plate 203 allowed by different mild steel dampers 2. It only needs to ensure that when the second sliding member 7 moves the design displacement value in the horizontal slide groove 4, the locking block 13 just withdraws from the second slot 17 to unlock the locking block 13. At the same time, the locking slot 9 on the first sliding member 6 is aligned with the locking pin 11, and the locking pin 11 can be smoothly inserted into the locking slot 9 driven by the first elastic element 12.

[0029] See also Figure 3 and Figure 4It can be understood that, in actual application, the slide 15 can be designed to include an intermediate horizontal section 21 and an inclined upward section 22 connected to both sides of the intermediate horizontal section 21. When the bridge is under the normal use load range and the action of a small earthquake, the upper cover plate 201 moves a small distance relative to the lower base plate 203, the caster 19 moves a short distance in the slide 15, and the lifting guide column 14 is not lifted enough, so the locking system will not be triggered. In this process, the soft steel damper 2 does not consume energy, but only plays a role in transmitting force to the first bridge structure 3. The piston rod 102 of the viscous damper retracts and contracts under the action of external force, and the viscous damper plays a role in vibration reduction / vibration energy absorption. When the bridge is subjected to a large earthquake or exceeds the normal load range of the bridge, the upper cover plate 201 of the soft steel damper 2 is subjected to a load of The load effect is large, the shock absorbing tenon 202 of the mild steel damper 2 is greatly deformed, the moving distance of the second sliding member 7 in the horizontal slide groove 4 increases, and the caster 19 will slide from the middle horizontal section 21 of the slide 15 to the inclined upward section 22. The caster 19 is pushed by the inclined surface of the inclined upward section 22, forcing the lifting guide column 14 to be continuously lifted. When the second sliding member 7 slides to the set distance, the lifting guide column 14 will drive the locking plug 13 to withdraw from the second slot 17, the locking pin 11 is unlocked, and inserted into the locking slot 9, locking the relative position of the first sliding member 6 and the second sliding member 7. At this time, the viscous damper is equivalent to a rigid connecting rod that consolidates the second bridge structure with the upper cover plate 201. The mild steel damper 2 dissipates energy through the yield deformation of the steel to resist the action of a large earthquake.

[0030] It is understandable that in order to improve the reliability of locking, two groups of locking components 8 are symmetrically arranged on both sides of the connecting component 5. In addition, in order to realize the flexible and adjustable locking triggering timing of the locking component 8, the length of the middle horizontal section 21 is adjustable. In this embodiment, when the locking triggering timing needs to be adjusted, it is only necessary to shorten or extend the length of the middle horizontal section 21 so that the lifting guide column 14 drives the locking plug 13 to withdraw from the second slot 17, and the caster 19 needs to move a longer distance or a shorter distance, so that the locking triggering timing can be adjusted. At the same time, multiple locking slots 9 are arranged side by side along the longitudinal direction of the bridge on the first sliding member 6 to ensure that after the triggering timing is adjusted and the locking plug 13 is unlocked, there is always a locking slot 9 aligned with the locking pin 11. Among them, the first elastic element 12 and the second elastic element 20 can be a coil spring, a gas spring or a rubber spring.

[0031] What needs to be explained is that the slide 15 also includes a side horizontal section 23 connected to the outer side of the inclined upward section 22, and a guide column locking assembly 8 is provided on the second sliding member 7 to lock the position of the lifting guide column 14. The guide column locking assembly 8 includes a spring pin 24 arranged on the second sliding member 7 and abutting against the lifting guide column 14, and a socket 25 arranged on the lifting guide column 14. When the caster 19 slides to the side horizontal section 23, the socket 25 of the lifting guide column 14 is aligned with the spring pin 24. The spring pin 24 is inserted into the socket 25 under the action of elastic force to lock the lifting guide column 14. By designing the guide column locking assembly 8 to lock the position of the lifting guide column 14, it can effectively prevent the caster 19 from moving back and forth along the entire length of the slide 15 during a major earthquake, causing wear of the caster 19.

[0032] See also Figure 1 Specifically, a guide hole 26 is provided on the first sliding member 6, and a guide column 27 is provided on the second sliding member 7 to match and slide in the guide hole 26. The extension direction of the guide hole 26 is parallel to the horizontal slide groove 4. The first sliding member 6 and the second sliding member 7 are guided by the guide hole 26 and the guide column 27 for sliding assembly.

[0033] See also Figure 3 Specifically, a rigid support 28 is provided on the second bridge structure, the cylinder 101 is hinged to the rigid support 28 through a latch, the second sliding member 7 is hinged to the connecting plate 29 on the upper cover plate 201 through a latch, the first bridge structure 3 is the main beam, and the second bridge structure 31 is the abutment. Figure 5 As shown, the horizontal slide 4 is surrounded by a bottom plate 401 and side plates 402 arranged on both sides of the bottom plate 401, and the bottom plate 401 is fixedly installed on the structural pier of the abutment through a support seat.

[0034] See also Figure 1-Figure 7 The specific working process of the above bridge vibration reduction / vibration system is as follows: Stage 1: Under the temperature, vehicle moving load, vehicle braking force and small earthquake in the normal operation stage, the bridge main beam transfers the load to the viscous damper through the rigid support 28, and the viscous damper transfers the load to the upper cover plate 201 of the mild steel damper 2 through the piston rod 102 and the connecting plate 29. The upper cover plate 201 transfers the force to the lower base plate 203 through the shock absorbing tenon 202, and then transfers the force to the abutment.

[0035] In this stage, the upper cover plate 201 of the mild steel damper 2 is subjected to a relatively small force transmitted by the piston rod 102, so the damping tenon 202 is slightly deformed, and the upper cover plate 201 of the mild steel damper 2 is slightly displaced. Since the lifting guide column 14 is arranged on the second sliding member 7, and the second sliding member 7 is fixed to the upper cover plate 201 of the mild steel damper 2 through the connecting plate 29, the horizontal displacement of the lifting guide column 14 is always equal to the displacement of the upper cover plate 201 of the mild steel damper 2, so the horizontal displacement of the lifting guide column 14 in this stage is also relatively small, although the caster 19 of the lifting guide column 14 will be vertically lifted as the height of the slideway 15 is lifted during the movement on the slideway 15. Since the horizontal displacement of the lifting guide column 14 is small in this stage, the lifting height of the lifting guide column 14 is not enough to allow the locking block 13 to withdraw from the second slot 17, and the first sliding member 6 and the second sliding member 7 will not be locked. During this process, the force applied to the soft steel damper 2 is less than the yield force of the shock absorbing tenon 202, so the soft steel damper 2 does not consume energy and only plays the role of transmitting force to the abutment. The viscous damper piston rod 102 undergoes telescopic movement under the action of external force, and the viscous damper plays a vibration reduction / vibration energy absorption role.

[0036] Phase 2: Before the start of the major earthquake phase, the bridge main beam transfers the load to the viscous damper through the rigid support 28, and the viscous damper transfers the load to the upper cover plate 201 of the mild steel damper 2 through the piston rod 102 and the connecting plate 29. The upper cover plate 201 transfers the force to the lower base plate 203 through the shock-absorbing tenon 202, and then transfers the force to the abutment.

[0037] At the beginning of the major earthquake stage, the upper cover plate 201 of the mild steel damper 2 is subjected to a large load, the shock absorbing tenon 202 is greatly deformed, and the horizontal displacement of the lifting guide column 14 is also large during this stage. The horizontal displacement of the upper cover plate 201 of the mild steel damper 2 is converted into the vertical displacement of the lifting guide column 14 through the slide 15. When the displacement of the upper cover plate 201 of the mild steel damper 2 reaches the preset displacement value, the caster 19 of the lifting guide column 14 moves to the trigger height position (height h1) of the inclined upward section 22 of the slide 15. At this time, the lifting guide column 14 is lifted to the set height, and the locking plug 13 connected to the lifting guide column 14 is disengaged from the second slot of the locking pin 11. The locking pin 11 pops outward under the action of the first elastic element 12 and enters the locking slot 9 on the first sliding member 6, thereby locking and consolidating the two sliding members. Thereafter, when the caster 19 of the lifting guide column 14 continues to move to the side horizontal section 23 (at height h2), the spring latch 24 on the second sliding member 7 just slides to the insertion hole 25 of the lifting guide column 14, and the spring latch 24 bounces into the insertion hole 25 under the elastic force provided by the pre-stressed spring, so that the lifting guide column 14 is locked and fixed in this position without affecting the operation of the subsequent assembly system.

[0038] The locking in stage 2 is carried out in two steps. The first step is that the caster 19 moves to the height h1 of the slide 15 to complete the locking of the locking pin 11. The second step is that the caster 19 moves to the top horizontal section h2 of the slide 15 to complete the locking of the lifting guide column 14. In stage 2, after the locking is completed, the cylinder of the viscous damper is directly connected to the upper cover plate 201 of the mild steel damper 2 through the first sliding member 6, the locking pin 11, the second sliding member 7, and the connecting plate 29. The force transmission component is changed from the piston rod 102 to the locking pin 11. The piston rod 102 is completely separated from the force transmission path. The extension speed of the piston rod 102 is zero, and the viscous damper stops working. At this time, the mild steel damper 2 dissipates energy through the yield deformation of the steel material to resist the action of a large earthquake.

[0039] In summary, the present invention is a locking device and method suitable for a bridge vibration reduction / seismic combination system. The locking device can autonomously and quickly realize the conversion of the functions of the viscous damper 1 and the mild steel damper 2, thereby achieving the purpose of bridge vibration reduction / seismic under different loads. Unless otherwise stated, if any technical solution disclosed in the present invention discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any technician in this field should understand that the preferred numerical range is only a numerical value with a more obvious technical effect or representative value among many feasible numerical values. Since there are too many numerical values ​​to be exhaustive, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention, and the numerical values ​​listed above should not constitute a limitation on the scope of protection of the invention.

[0040] At the same time, if the above-mentioned invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except when it is obviously impossible to use an one-piece molding process).

[0041] In addition, the terms used in any technical solution disclosed in the present invention to indicate positional relationships or shapes include states or shapes that are similar, similar or close to them unless otherwise stated. Any component provided by the present invention may be assembled from multiple separate components or may be a separate component manufactured by an integrated molding process.

[0042] The above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A bridge vibration reduction / vibration system, comprising a viscous damper and a mild steel damper arranged in the longitudinal direction of the bridge, wherein the mild steel damper is installed on a first bridge structure, and one end of the cylinder of the viscous damper is connected to a second bridge structure, characterized in that: The first bridge structure is provided with a horizontal slide groove extending in the longitudinal direction of the bridge, a first sliding member and a second sliding member are slidably mounted in the horizontal slide groove, the other end of the cylinder is fixedly connected to the first sliding member, the piston rod of the viscous damper is fixedly connected to the second sliding member, the second sliding member is connected to the upper cover plate of the mild steel damper, and a locking assembly is also provided between the first sliding member and the second sliding member to lock the relative positions of the two members; The locking assembly comprises a locking slot provided on the first sliding member, a transverse sliding cavity provided on the second sliding member, a locking bolt slidably mounted in the transverse sliding cavity, and a locking assembly for locking or unlocking the locking bolt, wherein a first elastic element is connected between the locking bolt and the transverse sliding cavity; Among them, the locking assembly is linked with the second sliding member. When the second sliding member slides a set distance, the locking assembly unlocks the locking pin under the drive of the second sliding member. The locking pin is matched and inserted into the locking slot under the action of the elastic force provided by the first elastic element, thereby fixing the relative positions of the first sliding member and the second sliding member.

2. The bridge vibration reduction / seismic system according to claim 1, characterized in that: The locking assembly includes a locking plug and a lifting guide column that moves synchronously with the second sliding member, the second bridge structure is provided with a slideway extending along the longitudinal direction of the bridge, the top wall of the transverse sliding cavity is provided with a first slot, the locking pin is provided with a second slot, the locking plug is matched and slidably arranged in the first slot, and the lower end is inserted into the second slot, the second sliding member is provided with a vertically extending lifting guide sleeve, the lifting guide column is matched and slidably installed in the lifting guide sleeve, the bottom of the lifting guide column is provided with a caster, a second elastic element is connected between the lifting guide sleeve and the lifting guide column, the extension direction of the first slot is parallel to the moving direction of the lifting guide column, and the locking plug is fixedly connected to the lifting guide column; wherein, The slide is low in the middle and high at both ends. When the second sliding member drives the lifting guide column to move from the middle to the end of the slide along the longitudinal direction of the bridge, the caster slides closely against the sliding bottom surface of the slide under the elastic force provided by the second elastic element, and drives the lifting guide column to be continuously lifted under the pushing action of the sliding bottom surface, so that the locking block is withdrawn from the second slot, thereby unlocking the locking pin.

3. The bridge vibration reduction / seismic system according to claim 2, characterized in that: The slideway comprises a middle horizontal section and inclined upward sections connected to both sides of the middle horizontal section.

4. The bridge vibration reduction / seismic system according to claim 3, characterized in that: A plurality of locking slots are arranged side by side along the longitudinal direction of the bridge on the first sliding member, and the length of the middle horizontal section is adjustable.

5. The bridge vibration reduction / seismic system according to claim 3, characterized in that: The slide also includes a side horizontal section connected to the outer side of the inclined upward section, and a guide post locking assembly is provided on the second sliding member to lock the position of the lifting guide post. The guide post locking assembly includes a spring pin arranged on the second sliding member and abutting against the lifting guide post, and a socket arranged on the lifting guide post. When the caster slides to the side horizontal section, the socket of the lifting guide post is aligned with the spring pin, and the spring pin is inserted into the socket under the action of elastic force to lock the lifting guide post.

6. The bridge vibration reduction / seismic system according to any one of claims 1 to 5, characterized in that: The first sliding member is provided with a guide hole, and the second sliding member is provided with a guide column which is matched and slidably installed in the guide hole, and the extending direction of the guide hole is parallel to the horizontal sliding groove.

7. The bridge vibration reduction / seismic system according to any one of claims 1 to 5, characterized in that: A rigid support is provided on the second bridge structure, and the cylinder is hinged to the rigid support via a latch.

8. The bridge vibration reduction / vibration system according to any one of claims 1 to 5, characterized in that: The second sliding member is hinged to the connecting plate on the upper cover plate through a latch.

9. The bridge vibration reduction / vibration system according to any one of claims 1 to 5, characterized in that: The first bridge structure is a main beam, and the second bridge structure is an abutment.

10. A bridge vibration reduction / seismic method of the bridge vibration reduction / seismic system according to any one of claims 1 to 9, characterized in that: When the bridge is under the normal use load range and small earthquake action, the second bridge structure transfers the load action to the viscous damper, and the viscous damper transfers the load action to the upper cover plate of the mild steel damper through the piston rod. The upper cover plate transfers the force to the lower bottom plate through the shock absorbing tenon of the mild steel damper, and then transfers the force to the first bridge structure. In this process, the mild steel damper does not consume energy and only plays the role of transmitting force to the first bridge structure. The piston rod of the viscous damper moves in extension and contraction under the action of external force, and the viscous damper plays the role of vibration reduction / vibration energy absorption. When the bridge is subjected to a major earthquake or exceeds the normal load range of the bridge, the upper cover of the mild steel damper is subjected to a large load, and the shock-absorbing tenon of the mild steel damper undergoes a large deformation. When the displacement of the upper cover of the mild steel damper reaches a preset displacement value, that is, when the second sliding member slides a set distance, the locking assembly linked thereto unlocks the locking pin, and the locking pin is inserted into the locking slot to lock the relative position of the first sliding member and the second sliding member. At this time, the viscous damper is equivalent to a rigid connecting rod that fixes the second bridge structure to the upper cover. The mild steel damper dissipates energy through the yield deformation of the steel to resist the effects of a major earthquake.

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