High-speed railway bridge damping device capable of being autonomously repaired by inertial force

Abstract

The application discloses a high-speed railway bridge damping device capable of being autonomously repaired by inertial force, which comprises a damping and isolation support arranged on the top of a prefabricated pier column, damping units symmetrically arranged on the two sides of the damping and isolation support, and a pre-embedded component for connecting and fixing the damping units with a beam body and the prefabricated pier column. The damping unit comprises upper and lower connecting plates and an initial energy consumption component fixedly connected between the upper and lower connecting plates; the damping unit further comprises a standby energy consumption component and a limiting component; the limiting component comprises a fixed structure connected to the bottom surface of the upper connecting plate and a movable fastener connected to the fixed structure; the standby energy consumption component is arranged in parallel with the initial energy consumption component, the lower end of the standby energy consumption component is fixed to the lower connecting plate, and the upper end of the standby energy consumption component is supported on the bottom surface of the fixed structure; when the initial energy consumption component is sheared and damaged by seismic energy, the movable fastener can fall down under the action of inertial force to clamp and limit the standby energy consumption component, so that the standby energy consumption component replaces the support and energy consumption effect of the initial energy consumption component, the damping unit is self-repaired, the support is protected from being damaged, and beam damage is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of bridge shock absorption, and particularly relates to a high-speed railway bridge shock absorption device capable of being autonomously repaired through inertial force. BACKGROUND

[0002] Since high-speed railways often cross long distances, the geological and hydrological conditions of different regions change complexly, which greatly influences the construction of high-speed railways, and the high-speed railways themselves have high requirements for driving stability and comfort. Therefore, in the construction process, high-speed railways often adopt the construction of bridges to avoid the influence of complex terrains. Bridges play an important role in the whole high-speed railway, and should be prevented from being greatly damaged in earthquakes.

[0003] At present, the bridge shock absorption is often realized through shock absorption and isolation devices, which include shock absorption and isolation bearings, dampers and the like. Common shock absorption and isolation bearings include lead rubber bearings, high-damping rubber bearings, friction pendulum bearings and the like. Common dampers include steel dampers, fluid viscous dampers and the like.

[0004] The working principle of the shock absorption and isolation technology mainly has the following two aspects:

[0005] On the one hand, the bearing is usually in series with the superstructure (main beam, etc.) and the cap beam pier to form a series structure. The stiffness (post-yield stiffness) of the shock absorption and isolation device itself is small. The overall stiffness after the series structure is close to a small value in the numerical value, so that the structural system is flexible, avoiding the high-frequency region of the seismic energy and reducing the structural seismic response;

[0006] On the other hand, the shock absorption and isolation device dissipates the seismic input energy through plastic work dissipation or viscous damping dissipation.

[0007] However, the above system mostly has the following shortcomings:

[0008] 1. When the damper is damaged, it cannot continue to produce effects to protect the bridge structure;

[0009] 2. The energy dissipation equipment cannot be replaced and repaired by itself under the action of an earthquake;

[0010] Part of the high-speed railway bridge provided with the shock absorption and isolation device will still have bearing or girder damage after the shock absorption and isolation device is damaged. SUMMARY

[0011] The application aims to provide a high-speed railway bridge shock absorption and isolation device capable of being autonomously repaired in an earthquake, so as to avoid bearing damage and / or girder damage.

[0012] The application provides the high-speed railway bridge damping device which can be autonomously repaired by inertial force, and adopts the following technical scheme: a damping isolation support is arranged on the top of a prefabricated pier column, damping units are symmetrically arranged on the two sides of the damping isolation support, and the damping units are connected and fixed with a beam body and the prefabricated pier column through embedded components. The damping unit comprises upper and lower connecting plates and an initial energy consumption component fixedly connected between the upper and lower connecting plates; a standby energy consumption component and a limiting component are further included, the limiting component comprises a fixed structure body connected to the bottom surface of the upper connecting plate and a movable fastener connected to the fixed structure body, the standby energy consumption component is arranged in parallel with the initial energy consumption component, the lower end is fixed with the lower connecting plate, and the upper end is supported on the bottom surface of the fixed structure body; when the initial energy consumption component is sheared and damaged by seismic energy, the movable fastener can fall down to clamp and limit the standby energy consumption component under the action of inertial force, so that the standby energy consumption component replaces the support and energy consumption effect of the initial energy consumption component, and the damping unit is self-repaired.

[0013] When the above technical scheme is implemented, the upper and lower connecting plates are rectangular steel plates, and the initial energy consumption component is a rectangular steel plate which is vertically connected to the length direction center surface between the upper and lower connecting plates.

[0014] When the above technical scheme is implemented, the fixed structure body comprises a mounting box and a limiting block, the width of the limiting block is the same as the width of the inner cavity of the mounting box, the length of the limiting block is less than the length of the inner cavity, the limiting block is centrally fixed in the inner cavity, and rectangular holes are arranged on the bottom plate of the mounting box and correspond to the two ends of the limiting block.

[0015] When the above technical scheme is implemented, the upper connecting plate is provided with mounting holes corresponding to the inner cavities of the mounting boxes.

[0016] When the above technical scheme is implemented, the movable fastener is a reverse U-shaped plate body, after being inserted and assembled from the mounting holes in the upper connecting plate downward, the bottom surfaces of the two sides of the movable fastener are flush with the bottom surface of the mounting box, the bottom surface of the top plate is supported by the limiting block, and the top surface does not protrude from the upper surface of the upper connecting plate.

[0017] When the above technical scheme is implemented, the standby energy consumption component has two groups and is symmetrically arranged on the two sides of the initial energy consumption component.

[0018] When the above technical scheme is implemented, the standby energy consumption component is a T-shaped plate structure, the wing plates of the T-shaped plate structure are symmetrically provided with limiting holes for mounting the movable fasteners, and the limiting holes and the rectangular holes are length direction misaligned when the standby energy consumption component is assembled.

[0019] When the above technical scheme is implemented, the wing plates of the initial energy consumption component are fixed with rubber plates, and the rubber plates are provided with corresponding limiting holes.

[0020] In this invention, the damping unit is equipped with an initial energy-dissipating component and a parallel backup energy-dissipating component. When the initial energy-dissipating component is sheared and damaged, the movable fastener falls under the action of inertial force to lock and limit the backup energy-dissipating component, allowing the backup component to replace the initial energy-dissipating component in providing support and energy dissipation. This enables the damping unit to self-repair, protecting the bearings from seismic damage and thus preventing beam collapse. Specifically, the initial energy-dissipating steel plate functions as a traditional damper, absorbing seismic energy to a large extent and protecting the seismic isolation bearings and piers from seismic damage. When a small earthquake occurs, the initial energy-dissipating steel plate undergoes slight deformation, consuming some seismic energy. Due to the small amount of deformation, the seismic isolation bearings themselves mainly resist the seismic action at this stage. When a major earthquake strikes, the initial energy-dissipating steel plate undergoes significant shear deformation and failure. A longitudinal displacement difference arises between the upper and lower connecting plates. When the rectangular hole on the bottom of the mounting box aligns with the limiting hole at the upper end of the spare energy-dissipating component, the movable fastener falls and inserts into the limiting hole, allowing the spare energy-dissipating component to perform its supporting and energy-dissipating functions, thus enabling the damping unit to self-repair. In short, this device can lock the spare energy-dissipating component with a movable fastener after the initial energy-dissipating steel plate has been sheared and failed by earthquake energy. This allows the spare energy-dissipating component to continue supporting and dissipating energy, enabling the damping unit to self-repair, protecting the support from earthquake damage, and thus preventing beam collapse. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the isometric structure under normal conditions according to an embodiment of the present invention.

[0022] Figure 2 for Figure 1 Enlarged structural schematic diagram of the intermediate damping unit.

[0023] Figure 3 for Figure 2 Enlarged structural diagram with the upper connecting plate and fixed structure hidden.

[0024] Figure 4 for Figure 3 A structural diagram with the movable fasteners hidden.

[0025] Figure 5 This is an isometric structural diagram of the shock absorption unit and the limiting component assembly.

[0026] Figure 6 This is an isometric structural diagram of the shock absorption unit and limiting component assembly from another angle. Detailed Implementation

[0027] like Figure 1 As shown, the high-speed railway bridge vibration reduction device that can be autonomously repaired by inertial force disclosed in this embodiment includes a vibration reduction and isolation bearing 3 installed between the precast pier 2 and the beam 1, and vibration reduction units 4 symmetrically arranged on both sides of the vibration reduction and isolation bearing 3.

[0028] As Figures 2 to 6 shown, the damping unit 4 includes an upper connecting plate 41, a lower connecting plate 42, an initial energy dissipation steel plate 43, a mounting box 44, a limiting block 45, a movable fastener 46, and a standby energy dissipation component 47.

[0029] The upper connecting plate 41, the lower connecting plate 42, and the initial energy dissipation component 43 are all rectangular steel plates.

[0030] The initial energy dissipation component 43 is vertically welded to the lengthwise central surface between the upper connecting plate 41 and the lower connecting plate 42.

[0031] The mounting box 44, the limiting block 45, and the movable fastener 46 are limiting components of the standby energy dissipation component 47.

[0032] The mounting box 44 is cuboid-shaped, and the limiting block 45 has the same width as the inner cavity of the mounting box and a length less than the inner cavity length.

[0033] The limiting block 45 is centrally fixed in the inner cavity of the mounting box 44, and the bottom plate of the mounting box 44 is provided with rectangular holes 441 corresponding to the two ends of the limiting block 45.

[0034] The mounting box 44 is symmetrically welded to the lengthwise ends of the upper connecting plate 41 as a fixed structure, and the upper connecting plate 41 is provided with corresponding mounting holes 411 corresponding to the inner cavity of the mounting box 44.

[0035] The movable fastener 46 is a reversed U-shaped plate body used to limit the standby energy dissipation component 47.

[0036] When the movable fastener 46 is assembled, it is inserted downward from the mounting hole 411 on the upper connecting plate 41, the two side arms are inserted into the rectangular holes 441 on the bottom plate of the mounting box 44, the bottom surface is flush with the bottom surface of the mounting box 44, the top plate bottom surface is above the limiting block 45, and the top surface is flush with the upper surface of the upper connecting plate 41.

[0037] The standby energy dissipation component 47 is a T-shaped plate structure, the plate body width matches the mounting box width, and the wing plates are symmetrically provided with limiting holes 471 for mounting the movable fastener 46.

[0038] When the standby energy dissipation component 47 is assembled, the wing plates are supported on the bottom surface of the mounting box 44, and the limiting holes 471 are lengthwise offset from the rectangular holes 441, so that the side arms of the movable fastener 46 cannot fall into the limiting holes. The specific offset length is determined according to actual calculations, and is generally about 10 mm.

[0039] In order to increase the stability of the standby energy dissipation component, a rubber plate 48 is fixed on the top surface of the wing plate of the standby energy dissipation component, and the rubber plate is provided with limiting holes corresponding to the wing plate of the standby energy dissipation component 47.

[0040] The standby energy-consuming component 47 is arranged in two groups, because the displacement difference between the upper connecting plate 41 and the lower connecting plate 42 can be to the left or to the right when the earthquake acts, and the two groups of standby energy-consuming components are arranged to ensure that both cases can function.

[0041] The upper connecting plate 41 and the lower connecting plate 42 of the damping unit 4 are respectively connected to the embedded component, and the embedded component adopts a conventional structure (not shown in the figure) including a rectangular steel plate matched with the upper and lower connecting plates and a plurality of high-strength bolt rods, and the two end sections of the bolt rods are respectively provided with high-strength nuts.

[0042] The planar size of the rectangular steel plate is the same as that of the upper and lower connecting plates, and the rectangular steel plate is connected to the upper and lower connecting plates through the bolt rods and then locked through the high-strength nuts.

[0043] The rectangular steel plate and the upper and lower connecting plates are provided with four rows of circular holes in the width direction, including two end rows and two rows of center faces about the length direction center face.

[0044] When the factory produces, the rectangular steel plate is matched with the upper and lower connecting plates to process the circular holes, so as to ensure the accurate alignment of the position of the circular holes.

[0045] When the pier column and the beam body are prefabricated in the factory, the rectangular steel plate and the bolt rod of the embedded component are assembled and fixed, and then embedded.

[0046] When the damping unit 4 is produced in the factory, the upper connecting plate 41 is welded with the mounting box 44, and the initial energy-consuming steel plate 43 is welded to the upper connecting plate 41 and the lower connecting plate 42 to form a I-shaped structure. The upper end of the standby energy-consuming component 47 is supported on the bottom surface of the mounting box 44, the rectangular hole 441 on the bottom surface of the mounting box is checked to have a length direction specified misalignment with the limiting hole 471 on the wing plate of the standby energy-consuming component, and then the lower end of the web of the standby energy-consuming component 47 is welded and fixed to the lower connecting plate 42.

[0047] The movable fastener 46 is not assembled first, and is concentrated and stored for transportation to the site, so as not to be lost.

[0048] The damping unit 4 must be preassembled when produced, so as to ensure that the top surface position of the movable fastener 46 and the falling can smoothly penetrate the limiting hole on the wing plate of the standby energy-consuming component 47.

[0049] When the damping unit 4 is transported to the construction site for assembly, the lower connecting plate 42 is fixed to the bolt rod of the embedded component protruding from the upper end of the pier column through the high-strength nut.

[0050] Then the movable fastener 46 is assembled in the aforementioned manner.

[0051] When the beam body 1 is installed, the bolt rod of the embedded component protruding from the bottom surface is locked between the upper connecting plate 41 of the damping unit 4 through the high-strength nut.

[0052] The working principle of the device is as follows:

[0053] The initial energy-consuming steel plate plays a traditional damper effect and can absorb a large amount of seismic energy to protect the seismic isolation bearing and the pier column from being damaged by the earthquake.

[0054] When a small earthquake occurs, the initial energy-consuming steel plate deforms slightly and consumes a certain amount of seismic energy. Since the deformation is not large, the seismic isolation bearing itself mainly resists the earthquake action at this stage. The upper end of the standby energy-consuming component is padded with a rubber plate that can be extruded and deformed, so the position is stable.

[0055] When a large earthquake occurs, the initial energy-consuming steel plate deforms and breaks due to a large shear deformation. The longitudinal displacement difference between the upper connecting plate and the lower connecting plate causes the rectangular hole 441 on the bottom surface of the mounting box to be aligned with the limiting hole 471 on the upper end of the standby energy-consuming component. When the movable fastener 46 falls and is inserted into the limiting hole, the standby energy-consuming component 47 plays a supporting and energy-consuming role, and the seismic isolation unit is self-repaired.

[0056] In short, after the initial energy-consuming steel plate is sheared and damaged by the seismic energy, the device can lock the standby energy-consuming component through the movable fastener, so that the standby energy-consuming component continues to support and consume energy, and the seismic isolation unit is self-repaired. The bearing is protected from damage by the earthquake, thereby avoiding the damage of the falling beam.

Claims

1. A vibration damping device for high-speed railway bridges that can self-repair through inertial force, comprising a vibration damping and isolation bearing installed on the top of a precast pier, and vibration damping units symmetrically arranged on both sides of the vibration damping and isolation bearing, wherein the vibration damping units are respectively connected and fixed to the beam and the precast pier through pre-embedded components, characterized in that: The damping unit includes an upper connecting plate and a lower connecting plate, and an initial energy dissipation component fixedly connected between them; it also includes a spare energy dissipation component and a limiting assembly. The limiting assembly includes a fixed structure connected to the bottom surface of the upper connecting plate and a movable fastener connected thereto. The spare energy dissipation component is arranged parallel to the initial energy dissipation component, with its lower end fixed to the lower connecting plate and its upper end supported on the bottom surface of the fixed structure. When the initial energy dissipation component is sheared and damaged by seismic energy, the movable fastener can fall under the action of inertial force to lock and limit the spare energy dissipation component, so that the spare energy dissipation component replaces the supporting and energy dissipating function of the initial energy dissipation component, enabling the damping unit to self-repair. The fixed structure includes a mounting box and a limiting block. The width of the limiting block is the same as the width of the inner cavity of the mounting box, and the length is less than the length of the inner cavity of the mounting box. The limiting block is fixed in the inner cavity of the mounting box. Rectangular holes are provided on the bottom plate of the mounting box corresponding to the two ends of the limiting block. The upper connecting plate is provided with mounting holes corresponding to the inner cavity of the mounting box; The movable fastener is an inverted U-shaped plate. After being inserted and assembled from the mounting hole on the upper connecting plate, the bottom surfaces of the two side arms are flush with the bottom surface of the mounting box, and the bottom surface of the top plate is supported by the limiting block, so that the top surface does not protrude from the upper surface of the upper connecting plate. There are two sets of backup energy-consuming components, which are symmetrically arranged on both sides of the initial energy-consuming component; The spare energy-consuming component is a T-shaped plate structure, with symmetrically arranged limiting holes at both ends of its wing plate for installing the movable fastener; when the spare energy-consuming component is assembled, the limiting holes and the rectangular holes are misaligned in the length direction.

2. The high-speed railway bridge vibration damping device that can self-repair through inertial force as described in claim 1, characterized in that: Both the upper and lower connecting plates are rectangular steel plates, and the initial energy-dissipating component is a rectangular steel plate, which is perpendicularly connected to the center plane of the upper and lower connecting plates along the length direction.

3. The high-speed railway bridge vibration damping device that can self-repair through inertial force as described in claim 1, characterized in that: A rubber plate is fixed to the top surface of the wing plate of the backup energy-consuming component, and the rubber plate is provided with corresponding limiting holes.

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