Bridge vibration reduction / vibration system and method

Abstract

The present invention discloses a bridge vibration reduction / vibration system, comprising a viscous damper and a mild steel damper arranged in the longitudinal direction of the bridge in the vibration reduction / vibration direction. The mild steel damper is mounted on a first bridge structure, one end of the cylinder of the viscous damper is connected to the second bridge structure, a horizontal slide extending in the longitudinal direction of the bridge is mounted 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 mounted in the horizontal slide, 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 of the mild steel damper, and a locking assembly is further provided between the first and second sliding members to lock the relative positions of the two. The present invention uses the displacement value of the upper cover of the mild steel damper as a locking control index, and the locking timing is accurate, so that the switching of the working states of the viscous damper and the mild steel damper can be accurately achieved.

Description

Technical Field

[0001] The present 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 shear pins 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 pins 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) The shearing needs to be considered. The processing accuracy and material uncertainty of the pins that play 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 pins 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 / vibration 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 / vibration system and method, which uses the upper cover plate displacement value of the mild steel damper as a locking control index. The locking timing is accurate 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 includes a viscous damper and a mild steel damper arranged in the longitudinal direction of the bridge in the vibration reduction / vibration direction, the mild steel damper being installed on a first bridge structure, one end of the cylinder of the viscous damper being connected to the second bridge structure, a horizontal slide groove extending in the longitudinal direction of the bridge being installed on the first bridge structure, a first sliding member and a second sliding member that can slide independently of each other being matched and slidably installed in the horizontal slide groove, the other end of the cylinder being fixedly connected to the first sliding member, the piston rod of the viscous damper being fixedly connected to the second sliding member, the second sliding member being connected to the upper cover plate of the mild steel damper, and a locking assembly being provided between the first sliding member and the second sliding member for locking the relative positions of the two;

[0006] The locking assembly includes a locking slot provided on the first sliding member, a transverse sliding cavity provided on the second sliding member, a locking pin slidably mounted in the transverse sliding cavity, and a locking assembly for locking or unlocking the locking pin, wherein a first elastic element is connected between the locking pin and the transverse sliding cavity;

[0007] In which, 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.

[0008] 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 slide extending longitudinally along the bridge, the top wall of the transverse sliding cavity is provided with a first slot, and 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,

[0009] 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 close to 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.

[0010] Specifically, the slide includes a middle horizontal section and inclined upward sections connected to both sides of the middle horizontal section.

[0011] 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.

[0012] 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 post locking assembly for locking 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.

[0013] Specifically, a guide hole is provided on the first sliding member, and a guide column is provided on the second sliding member and is matched and slidably installed in the guide hole. The extending direction of the guide hole is parallel to the horizontal sliding groove.

[0014] Specifically, a rigid support is provided on the second bridge structure, and the cylinder is hinged to the rigid support via a pin.

[0015] Specifically, the second sliding member is hinged to the connecting plate on the upper cover through a latch.

[0016] Specifically, the first bridge structure is a main beam, and the second bridge structure is an abutment.

[0017] The present invention also provides a bridge vibration reduction / seismic method. When the bridge is under the normal service load range and the action of a small earthquake, the second bridge structure transmits the load action to the viscous damper. 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 base plate through the shock-absorbing tenon of the mild steel damper, and then transmits the force to the first bridge structure. During 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 undergoes telescopic movement under the action of external force, and the viscous damper plays the role of vibration reduction / seismic energy absorption.

[0018] 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 positions 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.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The locking structure of the viscous damper uses the designed displacement value of the upper cover plate of the mild steel damper relative to the lower base plate as the locking control indicator. The locking pin serves to transmit force but not to control shearing. This avoids the phenomenon that when using shear pins, there is an error between the shear force and the designed value due to machining accuracy, material uncertainty and pin fatigue damage, making the locking trigger timing more accurate.

[0021] (2) To restore a bridge after an earthquake, it is only necessary to replace the soft steel damper and reset the locking pin, and the system can be used again for earthquake resistance, which greatly improves the efficiency and convenience of maintenance work and has broad prospects for practical engineering application.

[0022] (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 soft steel damper to play a vibration reduction / seismic role, thereby realizing the protection of the viscous damper. The combined system fully utilizes the vibration reduction / seismic capabilities of the viscous damper and the soft steel damper through switching between the viscous damper and the soft steel damper, thereby reducing the cost of bridge vibration reduction / seismic.

[0023] (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

[0024] 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.

[0025] Figure 1 It is the overall structural diagram of the bridge vibration reduction / seismic system;

[0026] Figure 2 It is a three-dimensional diagram of the bridge vibration reduction / seismic system;

[0027] Figure 3 This is the front view of the bridge vibration reduction / seismic system;

[0028] Figure 4 is a schematic diagram of a state in which the first sliding member and the second sliding member are unlocked;

[0029] Figure 5 is a schematic diagram showing a state in which the first sliding member and the second sliding member are locked;

[0030] Figure 6 This is a disassembled diagram of the locking latch and the transverse sliding cavity;

[0031] Figure 7 Schematic diagram of three-dimensional disassembly of the vertical lifting system;

[0032] Wherein: 1. Viscous damper; 101. Cylinder; 102. Piston rod; 2. Mild steel damper; 201. Upper cover; 202. Shock-absorbing tenon; 203. Lower base; 3. First bridge structure; 4. Horizontal slide; 401. Base; 402. Side plate; 5. Connecting assembly; 6. First sliding member; 7. Second sliding member; 8. Locking assembly; 9. Locking slot; 10. Horizontal sliding cavity; 11. Locking pin; 12. First elastic element; 13. Locking plug; 14. Lifting guide post; 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 post; 28. Rigid support; 29. ​​Connecting plate; 30. Vertical lifting system; 31. Second bridge structure. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should 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" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0036] 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 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, and 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; 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.

[0037] See also Figure 4 and Figure 5 Specifically, the locking assembly 8 includes a locking slot 9 provided on the first sliding member 6, a transverse sliding cavity 10 provided 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.

[0038] See also Figure 3-Figure 5 When the bridge vibration / vibration reduction system is used to reduce vibration / vibration of the bridge, when the bridge is under the normal service load range and 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. The upper cover plate 201 transfers the force to the lower base 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. During this process, the mild steel damper 2 does not consume energy and 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 reducing vibration / vibration energy.

[0039] 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 the preset displacement value, that is, when the second sliding member 7 slides the 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.

[0040] 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 using a shear pin, 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.

[0041] 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 slide 15 extending longitudinally along 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 set in the first slot 16, and the lower end is inserted into the second slot 17, thereby locking The fixed insert 13 is locked in the transverse sliding cavity 10. At this time, the position of the locking insert 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 post 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 post 14. A caster 19 is provided at the bottom of the lifting guide post 14. A second elastic element 20 is connected between the lifting guide sleeve 18 and the lifting guide post 14. The locking insert 13 is fixedly connected to the lifting guide post 14; wherein,

[0042] 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 continue to rise 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. After 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 fixing 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, those skilled in the art 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 is only necessary to ensure that when the second sliding member 7 moves the design displacement value in the horizontal slide groove 4, the locking plug 13 just withdraws from the second slot 17, unlocking the locking plug 13, and 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.

[0043] 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 on both sides of the intermediate horizontal section 21. When the bridge is under the normal 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 high enough, so the locking system will not be triggered. In this process, the soft steel damper 2 does not consume energy and only plays the role of 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 vibration reduction / vibration energy absorption role. 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, and the shock-absorbing tenon 202 of the mild steel damper 2 undergoes a large deformation. 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. Under the push of the inclined surface of the inclined upward section 22, the caster 19 forces the lifting guide column 14 to continue to lift. When the second sliding member 7 slides to the set distance, the lifting guide column 14 will drive the locking block 13 to withdraw from the second slot 17, the locking pin 11 is unlocked, and inserted into the locking slot 9, locking 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 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.

[0044] 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 achieve 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 lengthen 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.

[0045] 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. The second sliding member 7 is provided with a guide column locking assembly 8 for locking 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.

[0046] 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 be matched and slidably installed 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 slidably assembled and guided through the guide hole 26 and the guide column 27.

[0047] 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 chute 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.

[0048] See also Figure 1-Figure 7 The specific working process of the above bridge vibration reduction / vibration system is as follows:

[0049] Phase 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.

[0050] During this stage, the force transmitted by the piston rod 102 to the upper cover plate 201 of the mild steel damper 2 is relatively small, so the shock absorbing tenon 202 undergoes relatively small deformation, and the upper cover plate 201 of the mild steel damper 2 undergoes relatively small displacement. Since the lifting guide column 14 is disposed 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 via 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. Therefore, the horizontal displacement of the lifting guide column 14 during 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 slide 15 increases during its movement on the slide 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.

[0051] 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. 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.

[0052] At the beginning of the major earthquake phase, the upper cover plate 201 of the mild steel damper 2 is subjected to a large load, causing the shock-absorbing tenon 202 to undergo significant deformation. The horizontal displacement of the lifting guide column 14 is also large during this phase, and the horizontal displacement of the upper cover plate 201 of the mild steel damper 2 is converted into a vertical displacement of the lifting guide column 14 via the slide 15. When the displacement of the upper cover plate 201 of the mild steel damper 2 reaches a 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 raised to the set height, and the locking plug 13 connected to the lifting guide column 14 disengages from the second slot of the locking pin 11. The locking pin 11, under the action of the first elastic element 12, pops outward into the locking slot 9 on the first sliding member 6, thereby locking the two sliding members. Afterwards, when the caster 19 of the lifting guide column 14 continues to move to the side horizontal section 23 (at height h2), the spring pin 24 on the second sliding member 7 slides to the socket 25 of the lifting guide column 14. The spring pin 24 springs into the socket 25 under the elastic force provided by the pre-compression spring, so that the lifting guide column 14 is locked and fixed in this position without affecting the subsequent operation of the assembly system.

[0053] Locking in stage two is performed in two steps. The first step is for caster 19 to move to height h1 of slideway 15 to lock locking pin 11. The second step is for caster 19 to move to the top horizontal section h2 of slideway 15 to lock lifting guide post 14. In stage two, after locking is completed, the cylinder of the viscous damper is directly connected to the upper cover plate 201 of the mild steel damper 2 via the first sliding member 6, locking pin 11, second sliding member 7, and connecting plate 29. The force transmission component changes from piston rod 102 to locking pin 11. Piston rod 102 is completely disengaged from the force transmission path, and its extension and retraction speed is zero. The viscous damper is no longer in operation. At this point, the mild steel damper 2 dissipates energy through steel yield deformation, resisting the effects of a large earthquake.

[0054] In summary, the present invention provides a locking device and method suitable for a bridge vibration / seismic combination system. The locking device can autonomously and rapidly switch the functions of the viscous damper 1 and the mild steel damper 2, thereby achieving the purpose of bridge vibration / seismic reduction under different loads. Unless otherwise stated, any technical solution disclosed in the present invention, if a numerical range is disclosed, is a preferred numerical range. Those skilled in the art should understand that a preferred numerical range is merely a numerical range that exhibits a more significant or representative technical effect among a number of feasible numerical values. Due to the large number of numerical values, it is impossible to enumerate them exhaustively. Therefore, the present invention discloses some numerical values ​​to illustrate the technical solution of the present invention. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of the present invention.

[0055] 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, using bolts or screws to connect), 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 a casting process) (except where it is obviously impossible to use an integrated forming process).

[0056] In addition, unless otherwise stated, terms used in any of the technical solutions disclosed herein to represent positional relationships or shapes include states or shapes that are similar, analogous, or approximate. Any component provided by the present invention may be assembled from multiple separate components or may be a single component manufactured using an integral molding process.

[0057] The above embodiments are merely examples to clearly illustrate the present invention and are not intended to limit its implementation. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A bridge vibration / seismic reduction system comprising a viscous damper and a mild steel damper arranged longitudinally along the bridge, the mild steel damper being mounted on a first bridge structure, and one end of the cylinder of the viscous damper being connected to a second bridge structure, characterized in that: The first bridge structure is provided with a horizontal slide extending in the longitudinal direction of the bridge, wherein a first sliding member and a second sliding member are slidably mounted in the horizontal slide, 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, and the second sliding member is connected to the upper cover plate of the mild steel damper, and a locking assembly is further provided between the first sliding member and the second sliding member to lock the relative positions of the two members; The locking assembly includes a locking slot provided on the first sliding member, a transverse sliding cavity provided on the second sliding member, a locking pin slidably mounted in the transverse sliding cavity, and a locking assembly for locking or unlocking the locking pin, wherein a first elastic element is connected between the locking pin and the transverse sliding cavity; In which, 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 / vibration 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 slide extending longitudinally along 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 close to 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 / vibration system according to claim 2, characterized in that: The slideway includes a middle horizontal section and inclined upward sections connected to both sides of the middle horizontal section.

4. The bridge vibration reduction / vibration 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 / vibration 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. The second sliding member is provided with a guide post locking assembly for locking 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 / vibration 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 that is matched and slidably installed in the guide hole. The extending direction of the guide hole is parallel to the horizontal sliding groove.

7. The bridge vibration reduction / vibration 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 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 using the bridge vibration reduction / seismic system according to any one of claims 1 to 9, characterized in that: When the bridge is under normal service load and small earthquakes, the second bridge structure transfers the load to the viscous damper. The viscous damper transmits the load to the upper cover of the mild steel damper through the piston rod. The upper cover transmits the force to the lower base plate through the shock-absorbing tenon of the mild steel damper, and then transmits the force to the first bridge structure. During 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 expands and contracts 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 positions 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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