Replaceable high pier straining beam with grading energy consumption function

Abstract

The utility model belongs to the technical field of bridge earthquake prevention and disaster reduction, and particularly relates to a replaceable high pier straining beam with a graded energy consumption function, which comprises a variable cross-section circular steel cylinder, dampers, two steel cylinder end plates and two pier beam connecting end plates, and the two steel cylinder end plates and the two pier beam connecting end plates are symmetrically arranged. According to the variable-cross-section circular steel cylinder straining beam, a traditional reinforced concrete straining beam can be replaced, the calculated height of a high pier is reduced, the stability of the pier in normal use is enhanced, earthquake energy can be dissipated in a graded mode through the shear bolts, the dampers and the variable-cross-section circular steel cylinders when a large earthquake occurs, and the earthquake energy is saved. The effects of dissipating energy and reducing the damage degree of the bridge pier main body are achieved; partition prefabrication can be achieved, manufacturing and splicing are simple, replacement is easy after an earthquake, part of components can be recycled, arrangement positions are flexible, and main structure construction is not affected. The device is simple in structure, easy to operate, low in requirement for working environment conditions and stable in working.

Description

Technical Field

[0001] This utility model relates to the field of bridge earthquake prevention and disaster reduction technology, specifically a replaceable high-pier tie beam with graded energy dissipation function. Background Technology

[0002] Due to the unique topography and geological conditions in western China, bridges spanning deep valleys, canyons, or major rivers often employ the structure of high-pier, long-span continuous rigid frame bridges. These bridges typically use double-limb thin-walled piers. Because of the significant pier height and their location in high-intensity seismic zones, their seismic resistance is becoming increasingly critical. The piers in a bridge structure primarily function to transfer the superstructure load smoothly to the foundation, making them crucial load-bearing components. Adding transverse beams between the piers of double-column high-pier bridges can effectively alter the stress state of the substructure. Furthermore, the internal force distribution of double-column high-pier bridges under seismic influence varies depending on the number and location of the transverse beams. Therefore, the transverse beam structure should be rationally designed to fully utilize its role in dissipating seismic energy and ensure a reasonable distribution of internal forces in the substructure, thereby improving the seismic performance of high-pier bridges. Research has found that adding transverse beams significantly improves the mechanical properties and overall stability of high-pier, long-span continuous rigid frame bridges, and the seismic response of the structure changes markedly under earthquake loading.

[0003] As the pier height increases, so does its flexibility. Under the combined action of vertical and horizontal forces, the pier may experience horizontal displacement. Installing tie beams between the piers can enhance the stability of high-pier bridges. Traditional reinforced concrete tie beams are all cast-in-place, requiring a series of procedures such as formwork erection, rebar tying, concrete pouring, and formwork removal. Working at heights for extended periods poses a significant safety hazard to workers. Furthermore, reinforced concrete tie beams involve numerous procedures, a long construction period, and slow progress. They also have relatively weak seismic resistance and are prone to failure during earthquakes, making them a common source of seismic damage to high-pier bridges. Once damaged by an earthquake, repairing reinforced concrete tie beams is difficult. The main girder of a bridge generally has high seismic performance and load-bearing capacity. During an earthquake, bending failure, bending-shear failure, and shear failure typically occur at the piers. Therefore, seismic design primarily targets the piers in the substructure, making the tie beams between the piers particularly crucial.

[0004] Therefore, a replaceable high-pier tie beam with graded energy dissipation function is proposed to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a replaceable high-pier tie beam with graded energy dissipation function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a replaceable high-pier tie beam with graded energy dissipation function, comprising a variable cross-section circular steel cylinder, a damper, steel cylinder end plates, and pier-beam connecting end plates. The number of steel cylinder end plates and pier-beam connecting end plates are both two and symmetrically arranged. A rotating plate is fixed to the opposite side of each of the two steel cylinder end plates. A first ear plate is provided on the side of each of the two steel cylinder end plates that are close to each other. A damper connector is provided on the left and right sides of the damper. A second ear plate is provided on the side of each of the two pier-beam connecting end plates that are close to each other. The first ear plate and the damper connector are connected by a first concentric shaft. The rotating plate and the second ear plate are connected by a second concentric shaft. The steel cylinder end plates are connected to the variable cross-section circular steel cylinder by shear bolts. The damper is located inside the variable cross-section circular steel cylinder. The cross-section of the variable cross-section circular steel cylinder decreases from both sides, with the smallest cross-sectional area in the middle.

[0007] Preferably, the variable cross-section circular steel cylinder, the steel cylinder end plate, and the pier-beam connecting end plate are all made of steel.

[0008] Preferably, the sidewalls of the second ear plate, the steel cylinder end plate rotating plate, the first ear plate, and the damper connector are all provided with concentric shaft holes.

[0009] Preferably, both of the steel cylinder end plates have shear bolt holes on their annular sidewalls.

[0010] Preferably, the cross-section of the variable cross-section circular steel cylinder changes from 1 / 5 of the distance on both sides, and the cross-section decreases in a quadratic parabolic shape, with the smallest cross-sectional area in the middle.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] (1) This utility model can replace the traditional reinforced concrete tie beam, reduce the calculated height of the high pier, and enhance the stability of the pier during normal use;

[0013] (2) This utility model can dissipate seismic energy in stages through shear bolts, dampers and variable cross-section circular steel cylinders during a major earthquake, thereby consuming energy and reducing the damage to the main body of the bridge pier;

[0014] (3) This utility model can be prefabricated in parts, is easy to manufacture and assemble, is easy to replace after an earthquake, some components can be recycled, and the layout is flexible and does not affect the construction of the main structure.

[0015] (4) This utility model has a simple structure, is easy to operate, has low requirements for working environment conditions, and is stable in operation. Attached Figure Description

[0016] Figure 1 This is a schematic cross-sectional view of the front structure of this utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0018] Figure 3 This is a schematic diagram of the structure of the present invention in use;

[0019] Figure 4 This is a front view of the connecting end plate.

[0020] In the figure: 1. Variable cross-section circular steel cylinder, 2. Damper, 3. Steel cylinder end plate, 4. Pier beam connecting end plate, 5. Turning plate, 6. First ear plate, 7. Second ear plate, 8. Second concentric shaft, 9. First concentric shaft, 10. Shear bolt, 11. Damper connector, 12. Threaded hole, 13. Shaft hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Example:

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] A replaceable high-pier tie beam with graded energy dissipation function includes a variable cross-section circular steel cylinder 1, a damper 2, steel cylinder end plates 3, and a pier-beam connecting end plate 4. The pier-beam connecting end plate 4 has threaded holes 12. The damper 2 is located inside the variable cross-section circular steel cylinder 1. The damper 2 does not participate in operation during normal operation of the tie beam; it only participates in operation after the shear bolts 10 are sheared during an earthquake. This design reduces the wear of the damper 2 and ensures that it dissipates seismic energy during large earthquakes. There are two steel cylinder end plates 3 and two symmetrically arranged pier-beam connecting end plates 4. A rotating plate 5 is fixed to the opposite side of each of the two steel cylinder end plates 3 for connection with the pier-beam connecting end plate 4. Each of the three adjacent sides is provided with a first ear plate 6. The left and right walls of the damper 2 are provided with damper connectors 11. The two pier beam connecting end plates 4 are provided with a second ear plate 7 on the adjacent side for connecting with the steel cylinder end plate 3. The pier beam connecting end plate 4 is fixedly connected to the high pier. The first ear plate 6 and the damper connector 11 are connected by a first concentric shaft 9. The rotating plate 5 and the second ear plate 7 are connected by a second concentric shaft 8. The steel cylinder end plate 3 is connected to the variable cross-section circular steel cylinder 1 by shear bolts 10. The number of shear bolts 10 is set according to the required shear load. The damper 2 is set inside the variable cross-section circular steel cylinder 1. The cross-section of the variable cross-section circular steel cylinder 1 decreases from both sides, and the cross-sectional area in the middle is the smallest.

[0026] The variable cross-section circular steel cylinder 1, the steel cylinder end plate 3, and the pier-beam connection end plate 4 are all made of steel to increase stability. After the tie beam is damaged by earthquake, the steel cylinder end plate 3 and the pier-beam connection end plate 4 can be recycled. The above scheme can increase the overall stiffness of the tie beam, enhance the stability of the bridge pier during normal use, and improve the recycling rate of materials.

[0027] The second ear plate 7, the steel cylinder end plate rotating plate 5, the first ear plate 6, and the damper connector 11 all have concentric shaft holes on their side walls. By adopting the above scheme, the pier-beam connecting end plate 4, the steel cylinder end plate 3, and the damper 2 can be easily assembled, disassembled, and replaced.

[0028] Both steel cylinder end plates 3 have shear bolt holes on their annular sidewalls. The number of shear bolts 10 is set according to the required shear load. The above scheme can realize the connection between the steel cylinder end plate 3 and the variable cross-section circular steel cylinder 1. At the same time, the shear bolts 10 can be sheared when subjected to a large earthquake, so as to dissipate the earthquake energy in time.

[0029] The cross-section of the variable cross-section circular steel cylinder 1 changes from 1 / 5 of the distance on both sides, and the cross-section decreases in a quadratic parabolic shape, with the smallest cross-sectional area in the middle. By adopting the above scheme, it can be ensured that in the event of a large earthquake, the weak part in the middle of the variable cross-section circular steel cylinder 1 can be bent and twisted, and the bending moment and torque generated by the earthquake can be dissipated in time.

[0030] Working principle:

[0031] Two rotating plates 5 are welded to one side of the steel cylinder end plate 3 for connection with the pier beam connecting end plate 4, and a pair of first ear plates 6 are welded to the other side for connection with the damper 2. Two pairs of second ear plates 7 are welded to the pier beam connecting end plate 4 for connection with the steel cylinder end plate 3. The pier beam connecting end plate 4 is fixedly connected to the high pier. The steel cylinder end plate 3 and the pier beam connecting end plate 4 are connected by a second concentric shaft 8. The steel cylinder end plate 3 and the damper 2 are connected by a first concentric shaft 9. The steel cylinder end plates 3 and the pier beam connecting end plates 4 are symmetrically arranged on the left and right sides. The steel cylinder end plate 3 is connected to the variable cross-section circular steel cylinder 1 by shear bolts 10. The damper 2 is located inside the variable cross-section circular steel cylinder 1. The cross-section of the variable cross-section circular steel cylinder 1 decreases from both sides, with the smallest cross-sectional area in the middle. The pier beam connecting end plate 4 is vertically arranged and has threaded holes 12. The pier beam connecting end plate 4 is fixedly connected to the high pier by bolts. During construction, a steel plate should be pre-embedded at the location of the tie beam for connection with the pier beam connecting end plate 4. The second ear plate 7 is vertically arranged. Both the outer side of the second ear plate 7 and the outer side of the steel cylinder end plate rotating plate 5 are arc-shaped. The second ear plate 7 and the rotating plate 5 have aligned shaft holes 13. A second concentric shaft 8 passes through these shaft holes, and pressure is applied to the second concentric shaft 8 to press the second ear plate 7 and the rotating plate 5 together. This second concentric shaft 8 connects the pier-beam connecting end plate 4 and the steel cylinder end plate 3. The steel cylinder end plate 3 is also vertically arranged. The outer side of the first ear plate 6 on the other side of the steel cylinder end plate 3 is also arc-shaped, and it has shaft holes aligned with the damper connector 11. A first concentric shaft 9 passes through the shaft holes of the first ear plate 6 and the damper connector 11, and pressure is applied to the first concentric shaft 9 to press the first ear plate 6 and the damper connector 11 together. This first concentric shaft 9 connects the steel cylinder end plate 3 and the damper 2. The variable cross-section circular steel cylinder 1 is prefabricated using factory templates. Its cross-section changes from 1 / 5 of the way down on both sides, decreasing in a quadratic parabolic shape, with the smallest cross-sectional area in the middle. Shear bolt holes are provided on the wall thickness side of the steel cylinder end plate. The variable cross-section circular steel cylinder 1 and the steel cylinder end plate 3 are connected by shear bolts 10, the number of which is determined according to the required shear load. The dimensions of the tie beams can be specifically determined based on the external dimensions and natural vibration period of the pier structure. At the same time, the optimal position and number of tie beams along the longitudinal and transverse directions of the pier are determined through calculation. A well-arranged tie beam can enhance the overall stability of the bridge pier. When a major earthquake occurs, the high pier will generate a large bending moment and torsional deformation under the action of seismic force. Since the middle section of the tie beam is small, it can generate bending and torsion, which can dissipate the bending moment and torque generated by the earthquake in time. When the earthquake reaches a certain intensity, the shear bolt 10 is sheared, and the damper 2 inside the variable cross-section circular steel cylinder 1 begins to work. The damper 2 can dissipate the seismic energy in time. Through the variable cross-section circular steel cylinder 1, shear bolt 10 and damper 2, the seismic energy is dissipated in stages, which can effectively reduce the degree of damage to the main structure of the bridge pier caused by the earthquake.When the earthquake is particularly strong and the tie beam is damaged, the tie beam can be quickly replaced after the earthquake, and the bridge piers can be reinforced and repaired in a timely manner, which greatly reduces the difficulty of construction. Some components of this device can be recycled and reused, thus reducing costs and saving resources.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A replaceable high-pier tie beam with graded energy dissipation function, comprising a variable cross-section circular steel cylinder (1), a damper (2), a steel cylinder end plate (3), and a pier-beam connection end plate (4), characterized in that, The number of steel cylinder end plates (3) and pier beam connecting end plates (4) are two and symmetrically arranged. A rotating plate (5) is fixed on the opposite side of the two steel cylinder end plates (3). A first ear plate (6) is provided on the side of the two steel cylinder end plates (3) that are close to each other. A damper connector (11) is provided on the left and right walls of the damper (2). A second ear plate (7) is provided on the side of the two pier beam connecting end plates (4) that are close to each other. The first ear plate (6) and the damper connector (11) are connected by a first concentric shaft (9). The rotating plate (5) and the second ear plate (7) are connected by a second concentric shaft (8). The steel cylinder end plates (3) are connected to the variable cross-section circular steel cylinder (1) by shear bolts (10). The damper (2) is located inside the variable cross-section circular steel cylinder (1). The cross-section of the variable cross-section circular steel cylinder (1) decreases from both sides, and the cross-sectional area is the smallest in the middle.

2. A replaceable high-pier tie beam with graded energy dissipation function according to claim 1, characterized in that: The variable cross-section circular steel cylinder (1), the steel cylinder end plate (3), and the pier beam connection end plate (4) are all made of steel.

3. A replaceable high-pier tie beam with graded energy dissipation function according to claim 1, characterized in that: The side walls of the second ear plate (7), the steel cylinder end plate rotating plate (5), the first ear plate (6), and the damper connector (11) are all provided with concentric shaft holes.

4. A replaceable high-pier tie beam with graded energy dissipation function according to claim 1, characterized in that: Both of the steel cylinder end plates (3) have shear bolt holes on their annular sidewalls.

5. A replaceable high-pier tie beam with graded energy dissipation function according to claim 1, characterized in that: The cross-section of the variable cross-section circular steel cylinder (1) changes from 1 / 5 on both sides, and the cross-section decreases in a quadratic parabolic shape, with the smallest cross-sectional area in the middle.

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