Anti-seismic structure of bridge

Abstract

The utility model belongs to the technical field of bridge construction engineering application, and particularly discloses an anti-seismic structure of a bridge, which comprises a steel corbel and a viscous damper, the viscous damper comprises a guide rod and a cylinder barrel sleeved on the guide rod, and the cylinder barrel is fixed on the upper surface of the steel corbel; the two ends of the guide rod are each provided with a connecting part, a sliding rail is fixedly installed on the steel corbel corresponding to each connecting part, and the connecting parts are installed on the sliding rails in a sliding mode. Corresponding to each connecting part, a supporting leg is arranged on the lower surface of the beam body, and the supporting legs are connected to the connecting parts; two limiting blocks are arranged on the steel corbel, and the two connecting parts are both located between the two limiting blocks. The connecting structure has the advantages that under conventional external vibration, consumption of external force is completed only through the viscous damper, the connecting part cannot impact the limiting block, when the beam body is subjected to large external impact, the connecting part can impact the limiting block, complete separation of the beam body and the pier is avoided, and the anti-seismic performance of a bridge is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction engineering application, and in particular relates to an earthquake-resistant structure of a bridge. Background Art

[0002] As an important part of transportation roads, bridges carry a large amount of goods and personnel. They not only need to bear the vibrations caused by passing vehicles, but also need to effectively reduce the impact of geological disasters such as earthquakes.

[0003] In order to improve the earthquake resistance of bridges, blocks are often set between the beams and the piers to improve the earthquake resistance of the bridges. However, since bridges are often in a state of shock during actual use, the blocks are very prone to fatigue. When subjected to strong external impacts such as earthquakes, the blocks can no longer play a seismic role, which can easily lead to separation between the beams and the piers.

[0004] Therefore, based on the above problems, the utility model provides a seismic resistant structure of a bridge. Utility Model Content

[0005] Purpose of the utility model: The purpose of the utility model is to provide a seismic-resistant structure of a bridge to solve the technical problems existing in the background technology, namely, when subjected to strong external impacts such as earthquakes, the block can no longer play a seismic-resistant role, which can easily lead to separation between the beam and the pier.

[0006] Technical solution: The utility model provides a seismic structure of a bridge, which includes a steel corbel and a viscous damper. The steel corbel is fixedly mounted on the side wall of the pier. The viscous damper includes a guide rod and a cylinder sleeved on the guide rod. Both the guide rod and the cylinder extend horizontally along the length direction of the beam body. The cylinder is fixed on the upper surface of the steel corbel. The two ends of the guide rod are respectively extended out of one end of the cylinder and then a connecting part is installed. Corresponding to each connecting part, a slide rail is fixedly mounted on the steel corbel. The slide rail extends along the extension direction of the guide rod. The connecting part is slidably mounted on the corresponding slide rail. Corresponding to each connecting part, a support leg is arranged on the lower surface of the beam body, and each support leg is connected to the corresponding connecting part. Two limit blocks are also fixedly arranged on the upper surface of the steel corbel, and the two connecting parts are located between the two limit blocks. In the initial state, the cylinder is located in the middle part of the guide rod.

[0007] Since the cylinder of the viscous damper is fixed on the steel bracket, when an external force acts on the beam, it will drive the guide rod to move along the axial direction of the cylinder and cause relative displacement with the cylinder, thereby consuming the energy brought by the external force, thereby reducing the impact of the external force on the bridge. Under normal external vibrations, the viscous damper alone can achieve the shock reduction needs. When subjected to a large external impact, causing the guide rod to move beyond its range of motion, the connecting part can hit the limit block to avoid the complete separation of the beam and the pier, thereby improving the seismic performance of the bridge. Under normal external vibrations, only the viscous damper is needed to consume the external force, the connecting part will not hit the limit block, and the limit block will not produce fatigue due to frequent impacts. It can still play a protective role when subjected to a large external impact to avoid the complete separation between the beam and the pier.

[0008] In the technical solution, a compression nut is respectively installed at both ends of the cylinder in a sealed manner, and the two ends of the guide rod respectively pass through the two compression nuts in a sealed manner and extend outward from the cylinder. A piston is provided in the cylinder, and the piston is fixed on the guide rod. The piston divides the inner cavity of the cylinder into two damping cavities, and the two damping cavities are filled with viscous damping liquid. A damping channel connecting the two damping cavities is provided on the piston. When an external force acts on the beam body, the guide rod will be driven to move along the axial direction of the cylinder, and the piston on the guide rod will be driven to move synchronously, and the viscous damping liquid in the two damping cavities will flow along the damping channel on the piston, thereby absorbing and consuming the energy brought by the external force, thereby reducing the impact of the external force on the bridge.

[0009] In the technical solution, a guide sleeve is further provided corresponding to each compression nut, and the guide sleeve is located on the inner side of the corresponding compression nut, and the compression nut presses the corresponding guide sleeve onto the cylinder. The guide sleeve can better form the damping cavity, ensure the sealing of the damping cavity, and guide the movement of the guide rod to avoid large deviation of the guide rod during movement, so as to avoid unnecessary damage to the guide rod or other components and affect the normal function of the viscous damper.

[0010] In the technical solution, the connecting part is an earring structure, and the connecting part is screwed on the end of the guide rod by means of a thread. This design can conveniently connect the support leg to the connecting part by means of a thread, so as to fine-tune the distance between the two connecting parts, so as to overcome the installation and processing errors of the support leg.

[0011] In the technical solution, a hinge hole is provided on each connecting portion, and the hinge shaft passes through the hinge hole to rotatably hinge the support leg on the connecting portion; wherein, the hinge hole can be used to conveniently connect the support leg to the mounting portion.

[0012] In the technical solution, in order to facilitate the installation of the viscous damper, a steel pad is fixedly provided on the upper surface of the steel bracket, the cylinder of the viscous damper is welded to the steel pad, and a reinforcing plate is welded between the two sides of the cylinder and the steel pad.

[0013] Compared with the prior art, the beneficial effect of the seismic structure of a bridge of the utility model is that under conventional external vibrations, only the viscous damper is relied upon to consume the external force, the connecting part will not hit the limit block, thus avoiding fatigue of the limit block; when the beam body is subjected to a large external impact, the connecting part can hit the limit block, thus avoiding complete separation of the beam body and the pier, thereby improving the seismic performance of the bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic structural diagram of an earthquake-resistant structure of a bridge of the utility model;

[0016] Figure 2 is the structural schematic diagram of the viscous damper;

[0017] Figure 3 for Figure 1 Cross-section along the AA direction;

[0018] Figure 4 for Figure 1 Cross-section along the BB direction;

[0019] Among them, the serial numbers in the figure are as follows: 10-steel corbel, 11-limit block, 12-slide rail, 13-steel pad, 131-reinforcement plate, 20-viscous damper, 21-cylinder, 22-piston, 23-guide rod, 24-guide sleeve, 25-pressure nut, 26-damping chamber, 27-connecting part, 28-hinge hole, 31-beam body, 32-support leg, 33-hinge shaft, 331-locking nut, 34-embedded plate, 35-flange, 36-bolt, 41-pier. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "top", "bottom", "one side", "the other side", "front", "back", "middle part", "inside", "top end", "bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 cannot be understood as a limitation of the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The seismic structure of a bridge shown in the figure comprises a steel corbel 10 and a viscous damper 20. The steel corbel 10 is fixedly mounted on the side wall of the pier 41. The viscous damper 20 comprises a guide rod 23 and a cylinder 21 sleeved on the guide rod 23. The guide rod 23 and the cylinder 21 extend horizontally along the length direction of the beam body 31. A compression nut 25 is sealedly mounted on both ends of the cylinder 21. Corresponding to each compression nut 25, a guide sleeve 24 is provided. The guide sleeve 24 is located on the inner side of the corresponding compression nut 25. The compression nut 25 presses the corresponding guide sleeve 24 on the cylinder 21. In the initial state without external vibration, the cylinder 21 is located in the middle of the guide rod 23.

[0024] The two ends of the guide rod 23 are respectively sealed through two compression nuts and then extend outward from the cylinder 21. A connecting portion 27 is respectively installed at the two ends of the guide rod 23. The connecting portion 27 is an earring structure and is screwed on the end of the guide rod 23 in a threaded manner. A piston 22 is arranged in the cylinder 21. The piston 22 is located between the two guide sleeves 24. The piston 22 is fixed on the guide rod 23. The piston 22 divides the inner cavity of the cylinder 21 into two damping chambers 26. The two damping chambers 26 are filled with viscous damping liquid. A damping channel 221 connecting the two damping chambers 26 is opened on the piston 22 (in the attached drawings, the viscous damping liquid is not shown, which does not affect the disclosure of the technical solution of the present application).

[0025] The cylinder 21 is fixed on the upper surface of the steel corbel 10, and the viscous damper 20 is installed on the steel corbel 10. Specifically in this embodiment, a steel pad 13 is welded on the lower side of the cylinder 21, and the steel pad 13 is fixed to the steel corbel 10 by bolts, and the viscous damper 20 is fixed to the steel corbel 10, and a reinforcing plate 131 is welded between the two sides of the cylinder 21 and the steel pad 13.

[0026] Corresponding to each connection part 27, a slide rail 12 is welded on the steel bracket 10, and the slide rail 12 extends along the extension direction of the guide rod 23. The connection part 27 is slidably mounted on the corresponding slide rail 12. Corresponding to each connection part, a support leg 32 is provided on the lower surface of the beam body 31, and each support leg 32 is connected to the corresponding connection part 27. In this embodiment, an embedded plate 34 is provided at the lower part of the beam body 31, and the flange 35 at the upper end of the support leg 32 is connected to the embedded plate 34 by bolts 36.

[0027] In this embodiment, a hinge hole 28 is provided on each connecting portion 27 , and the hinge shaft 33 passes through the hinge hole 28 to rotatably hinge the support leg 32 on the connecting portion 27 , and the locking nut 331 is screwed on the hinge shaft 33 to keep the hinge shaft 33 on the support leg 32 .

[0028] Two limit blocks 11 are further provided on the upper surface of the steel corbel 10 , and the two connecting portions 27 are both located between the two limit blocks 11 , and the two limit blocks 11 are both steel parts.

[0029] The structural principle or working principle of the earthquake-resistant structure of the bridge of this structure:

[0030] Since the cylinder 21 of the viscous damper 20 is fixed on the steel corbel 10, when an external force acts on the beam body 31, it will drive the guide rod 23 to move along the axial direction of the cylinder 21 and cause relative displacement with the cylinder 21, thereby driving the piston 22 to move synchronously. The viscous damping fluid in the two damping chambers 26 (the viscous damping fluid is not shown in the accompanying drawings, which does not affect the disclosure of the technical solution of the present application) will flow along the damping channel on the piston 22, thereby absorbing and consuming the energy brought by the external force, thereby reducing the impact of the external force on the bridge 31.

[0031] Under normal external vibrations, the shock absorption requirement can be achieved by relying solely on the viscous damper 20. When subjected to a larger external impact, causing the guide rod 23 to move beyond its range of motion, the connecting portion 27 can hit the limit block 11, preventing the beam body 31 from being completely separated from the pier 41, thereby improving the seismic performance of the bridge.

[0032] Under normal external vibrations, only the viscous damper 20 is needed to dissipate the external force. The connection portion 27 will not hit the limit block 11, and the limit block 11 will not produce fatigue due to frequent impacts. It can still play a protective role when subjected to a large external impact, avoiding complete separation between the beam body 31 and the pier 41.

[0033] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A seismic resistant structure of a bridge, characterized in that: It consists of a steel corbel and a viscous damper. The steel bracket is fixedly installed on the side wall of the pier. The viscous damper comprises a guide rod and a cylinder sleeved on the guide rod, wherein the guide rod and the cylinder both extend horizontally along the length direction of the beam body. The cylinder is fixed on the upper surface of the steel bracket. The two ends of the guide rod are respectively extended out of one end of the cylinder and then installed with a connecting part. Corresponding to each connecting part, a slide rail is fixedly installed on the steel bracket. The slide rail extends along the extension direction of the guide rod, the connecting part is slidably mounted on the corresponding slide rail, and corresponding to each connecting part, a supporting leg is arranged on the lower surface of the beam body, and each supporting leg is connected to the corresponding connecting part; Two limit blocks are fixedly arranged on the upper surface of the steel corbel, and the two connecting parts are both located between the two limit blocks.

2. The earthquake-resistant structure of a bridge according to claim 1, characterized in that: A clamping nut is sealedly installed at both ends of the cylinder, and both ends of the guide rod are sealed through the two clamping nuts and then extend out of the cylinder; there is a piston in the cylinder, the piston is fixed on the guide rod, the piston divides the inner cavity of the cylinder into two damping chambers, the two damping chambers are filled with viscous damping liquid, and a damping channel connecting the two damping chambers is opened on the piston.

3. The earthquake-resistant structure of a bridge according to claim 2, characterized in that: Corresponding to each clamping nut, a guide sleeve is provided. The guide sleeve is located at the inner side of the corresponding clamping nut, and the clamping nut presses the corresponding guide sleeve onto the cylinder barrel.

4. The earthquake-resistant structure of a bridge according to claim 1, characterized in that: The connecting part is an earring structure, and is screwed on the end of the guide rod in a threaded manner.

5. The earthquake-resistant structure of a bridge according to claim 1, characterized in that: A hinge hole is provided on each connection part, and the hinge shaft passes through the hinge hole to rotatably hinge the support leg on the connection part.

6. The earthquake-resistant structure of a bridge according to claim 1, characterized in that: A steel pad is fixedly arranged on the upper surface of the steel corbel, a cylinder of the viscous damper is welded to the steel pad, and a reinforcing plate is welded between both sides of the cylinder and the steel pad.

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