Pier-external assembled self-centering energy-dissipation steel bar structure

Abstract

The application discloses a self-resetting energy-dissipation steel rod structure assembled outside a pier and belongs to the technical field of bridge structures, which comprises a pier column end connector, an energy-dissipation steel rod main body, a rotating rod and a bearing platform end connector which are sequentially connected, wherein the pier column end connector is connected with a pier column, the first end of the energy-dissipation steel rod main body is fixedly connected with the pier column end connector, the second end is connected with the first end of the rotating rod through a connector, the second end of the rotating rod is connected with the bearing platform end connector through a rotating cover, and the bearing platform end connector is connected with a bearing platform.The energy-dissipation steel rod structure outside the pier greatly enhances the energy-dissipation hysteresis performance of the pier column, improves the anti-seismic performance of the pier, and endows the pier with certain self-resetting capability; the energy-dissipation steel rod structure can absorb and consume part of the seismic energy of the pier, and can improve the energy-dissipation capability of the overall structure without damaging the self-resetting capability of the pier structure.

Description

Technical Field

[0001] This invention belongs to the field of bridge structure technology, specifically relating to a self-resetting energy dissipation steel bar structure assembled outside the pier. Background Technology

[0002] Many regions in China are located in earthquake-prone areas, and buildings there face significant risks of earthquake damage. Earthquakes pose a huge threat and cause enormous losses to human life and economic property.

[0003] Highway bridges are the hubs of the road transport network. Severe damage to bridges caused by earthquakes often leads to traffic disruptions and is difficult to repair, affecting emergency rescue and post-earthquake reconstruction efforts.

[0004] In light of this, scholars both domestically and internationally have increasingly emphasized new earthquake-resistant structures and systems based on the concept of recoverable functionality in recent years. Bridge piers are the most critical component of bridge structures. If a swaying structure possesses damage control and self-resetting capabilities, it can ensure the safety and stability of the piers and achieve the expected design performance, greatly improving post-earthquake transportation order.

[0005] According to past research, the sway performance of bridge pier foundations can reduce the seismic force requirements of bridge piers and also provide self-resetting capability. However, although the sway performance of bridge pier foundations can reduce the seismic force borne by the bridge piers, it lacks reliable energy dissipation capability. If not properly controlled, it will produce large displacement. Therefore, energy dissipation components are added to the structure to help the structure dissipate seismic energy. However, although setting internal energy dissipation components can improve energy dissipation capability, they have the disadvantage of being difficult to repair or replace after an earthquake, making it difficult to meet the design concept and requirements of repairability or replacement. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a self-resetting energy dissipation steel bar structure assembled outside the pier. The energy dissipation steel bar structure can improve the energy dissipation capacity of the structure without damaging the self-resetting ability of the pier structure. The external energy dissipation device improves the seismic performance of the self-resetting pier, and has the ability to be repaired and replaced. It also greatly simplifies the construction process and improves the energy dissipation capacity and recoverability of the self-resetting pier.

[0007] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0008] An externally assembled self-resetting energy-dissipating steel bar structure is used for external connection between the pier column and the foundation. The externally assembled self-resetting energy-dissipating steel bar structure includes a pier column end connector, an energy-dissipating steel bar body, a rotating rod, and a foundation end connector connected in sequence. The pier column end connector is connected to the pier column. The first end of the energy-dissipating steel bar body is fixedly connected to the pier column end connector, and the second end is connected to the first end of the rotating rod through a middle connector. The second end of the rotating rod is connected to the foundation end connector through a rotating cover, and the foundation end connector is connected to the foundation.

[0009] Furthermore, the main body of the energy-consuming steel rod includes an end rod, a middle necked rod, and a tail rod connected in sequence. The outer sides of the end rod and the tail rod are provided with a first external thread. The outer diameter of the middle necked rod is smaller than the outer diameter of the end rod and the tail rod. The outer side of the middle necked rod is wrapped with a ring damper.

[0010] Furthermore, the rotating rod includes a rod body, a second external thread at the first end of the rod body, a central connector that is a built-in threaded steel sleeve, the second external thread of the rod body being threadedly connected to one end of the central connector, and a rod tail hinge ball at the second end of the rod body; the rotating cover is sleeved on the outside of the rod tail hinge ball and threadedly connected to the bearing end connector via a threaded joint.

[0011] Furthermore, the rod end hinge ball is a high-strength steel ball.

[0012] Furthermore, the rotating cover has a hollow interior to accommodate the rod end hinge ball; wherein, the rotating cover has a threaded hole matching the threaded joint on the side near the bearing end connector, and the other side of the rotating cover has a "trumpet-shaped" opening, the small diameter end of the opening is located on the side away from the central connector, and the diameter of the small diameter end of the opening is smaller than the diameter of the rod end hinge ball.

[0013] Furthermore, a hemispherical rotating groove is provided inside one side of the threaded joint, and the curvature of the rotating groove is consistent with that of the rod end hinge ball; the other side of the threaded joint is fixedly connected to the bearing end connector.

[0014] Furthermore, the bearing platform end connector includes a connecting block, a bearing platform end coupling plate, and a bearing platform end connector bolt; the connecting block is located at the center of the bearing platform end coupling plate, one side of the connecting block is fixedly connected to the threaded joint, the other side of the connecting block is fixedly connected to the bearing platform end coupling plate, and the bearing platform end coupling plate is fixedly connected to the top surface of the bearing platform by the bearing platform end connector bolt.

[0015] Furthermore, the pier end connector includes a steel square web, a steel triangular side wing plate, a pier end connector bolt, a pier end joining plate, and a high-strength nut; the pier end joining plate is provided with bolt holes for the pier end connector bolt to pass through, so as to fix it to the side of the pier by the pier end connector bolt;

[0016] The steel square web is located in the middle of the pier end joint plate and is vertically and fixedly connected to the pier end joint plate. Two triangular side wing plate groups are symmetrically arranged along the steel square web.

[0017] Each of the triangular side wing plate groups includes two parallel triangular side wing plates, wherein the triangular side wing plates are vertically and fixedly connected to the steel square web plate and the pier end joint plate;

[0018] The steel square web is provided with threaded holes for the end rod to pass through; there are two high-strength nuts, located on both sides of the steel square web respectively, and the high-strength nuts are engaged with the first external thread of the end rod to fix the energy-consuming steel rod body to the steel square web.

[0019] The beneficial effects of this invention are:

[0020] 1) The external energy dissipation steel bar structure greatly enhances the energy dissipation hysteresis performance of the pier, improves the seismic performance of the pier, and gives the pier a certain self-resetting ability.

[0021] 2) The energy dissipation steel bar structure can absorb and dissipate some of the seismic energy of the bridge piers, and can improve the energy dissipation capacity of the overall structure without damaging the self-resetting ability of the bridge pier structure.

[0022] 3) The structure is located outside the pier, which simplifies the construction process and greatly facilitates post-earthquake maintenance and replacement.

[0023] 4) This invention uses a large amount of energy-saving steel, is environmentally friendly and recyclable, has a flexible structural layout, occupies little space, and does not require additional building land;

[0024] The invention allows for the disassembly and assembly of all parts, which is beneficial for modular manufacturing and batch production in factories, meeting the construction requirements of modular and standardized development. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the disassembled surface structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the combined cross-sectional structure of the present invention;

[0027] Figure 3 This is a front view schematic diagram of the installation arrangement of the present invention;

[0028] Figure 4This is a top view of the installation arrangement of the present invention;

[0029] Figure 5 This is a schematic diagram of the combined three-dimensional structure of the present invention;

[0030] Figure 6 This is a three-dimensional cross-sectional diagram of the disassembly of the present invention.

[0031] The components are as follows: 1. Energy-consuming steel bar body; 2. End bar; 3. Tail bar; 4. Middle necked bar; 5. Ring damper; 6. Rotating rod; 7. Middle connector; 8. Rod body; 9. Rod tail hinge ball; 10. Rotating cover; 11. Threaded joint; 12. Connecting block; 13. Foundation end connecting plate; 14. Rotating groove; 15. Steel square web plate; 16. Steel triangular side wing plate; 17. Pier end connector bolt; 18. Pier end connecting plate; 19. High-strength nut; 20. Foundation end connector bolt; 21. Pier; 22. Foundation; 23. Pier end connector; 24. Foundation end connector. Detailed Implementation

[0032] This invention provides a self-resetting energy dissipation steel bar structure assembled outside the pier. The technical solution of this invention will be described in detail below with reference to the accompanying drawings to make it easier to understand and master.

[0033] Example 1

[0034] refer to Figure 1-6 A self-resetting energy-dissipating steel bar structure assembled outside the pier is used for external connection between the pier column 21 and the pier cap 22. The self-resetting energy-dissipating steel bar structure assembled outside the pier includes a pier end connector 23, an energy-dissipating steel bar body 1, a rotating rod 6 and a pier cap end connector 24 connected in sequence. The pier end connector 23 is connected to the pier column 21. The first end of the energy-dissipating steel bar body 1 is fixedly connected to the pier end connector 23. The second end is connected to the first end of the rotating rod 6 through a middle connector 7. The second end of the rotating rod 6 is connected to the pier cap end connector 24 through a rotating cover 10. The pier cap end connector 24 is connected to the pier cap 22.

[0035] In this embodiment, the self-resetting energy dissipation steel bar structure assembled outside the pier is externally installed, that is, set outside the pier body. It can not only absorb seismic energy and improve the energy dissipation performance of the pier, but also has the ability to be repaired and replaced.

[0036] Example 2

[0037] To ensure the energy dissipation hysteresis performance of the overall structure, this embodiment makes further settings based on embodiment 1.

[0038] In this embodiment, the energy-consuming steel rod body 1 includes an end rod 2, a middle necked rod 4 and a tail rod 3 connected in sequence. The outer sides of the end rod 2 and the tail rod 3 are provided with a first external thread. The outer diameter of the middle necked rod 4 is smaller than the outer diameter of the end rod 2 and the tail rod 3. The outer side of the middle necked rod 4 is wrapped with a ring damper 5.

[0039] In this embodiment, the first end of the energy-consuming steel rod body 1 is the end rod 2, and the second end is the tail rod 3.

[0040] The ring-shaped damper 5 wraps around the non-threaded area of ​​the energy-dissipating steel bar body 1 and completely encloses the middle necked-out bar body 4. The ring-shaped damper 5 effectively protects the middle necked-out bar body 4 from corrosion and ensures the energy dissipation hysteresis performance of the overall structure.

[0041] In this embodiment, the rotating rod 6 includes a rod body 8, the first end of the rod body 8 is provided with a second external thread, the middle connector 7 is a built-in threaded steel sleeve, the second external thread of the rod body 8 is threadedly connected to one end of the middle connector 7, and the second end of the rod body 8 is provided with a rod tail hinge ball 9; the rotating cover 10 is sleeved on the outside of the rod tail hinge ball 9 and is threadedly connected to the bearing end connector 24 through the threaded joint 11.

[0042] Among them, the end joint ball 9 is preferably a high-strength steel ball.

[0043] The rotating rod 6 connects the energy-dissipating steel bar body 1 and the bearing end connector 24, serving to connect and ensure that the bar can rotate in space, thereby ensuring the recoverability of the energy-dissipating structure.

[0044] In this embodiment, the rotating cover 10 has a hollow structure to accommodate the rod end hinge ball 9; wherein, the rotating cover 10 has a threaded hole matching the threaded joint 11 on the side near the support end connector 24, and the other side of the rotating cover 10 has a "trumpet-shaped" opening, with the small diameter end of the opening located on the side away from the middle connector 7, and the diameter of the small diameter end of the opening is smaller than the diameter of the rod end hinge ball 9.

[0045] The rotating cover 10 is a "trumpet-shaped" opening nut, which locks the rod end hinge ball 9 of the rotating rod 6, and at the same time cooperates with the rotating groove 14 of the threaded joint 11 to ensure the spatial rotation capability of the rotating rod 6.

[0046] In this embodiment, a hemispherical rotating groove 14 is provided inside one side of the threaded joint 11, and the curvature of the rotating groove 14 is consistent with that of the rod end hinge ball 9; the other side of the threaded joint 11 is fixedly connected to the bearing end connector 24.

[0047] In this embodiment, the pedestal end connector 24 includes a connecting block 12, a pedestal end connecting plate 13, and a pedestal end connector bolt 20. The connecting block 12 is located at the center of the pedestal end connecting plate 13. One side of the connecting block 12 is fixedly connected to the threaded joint 11, and the other side of the connecting block 12 is fixedly connected to the pedestal end connecting plate 13. The pedestal end connecting plate 13 is fixedly connected to the top surface of the pedestal 22 by the pedestal end connector bolt 20.

[0048] In this embodiment, the pier end connector 23 includes a steel square web plate 15, a steel triangular side wing plate 16, a pier end connector bolt 17, a pier end joining plate 18, and a high-strength nut 19; the pier end joining plate 18 is provided with bolt holes for the pier end connector bolt 17 to pass through, so as to fix it to the side of the pier 21 by the pier end connector bolt 17.

[0049] The steel square web plate 15 is located in the middle of the pier end joint plate 18 and is vertically fixed to the pier end joint plate 18. Two triangular side wing plate assemblies are symmetrically arranged along the steel square web plate 15.

[0050] Each triangular side wing plate group includes two parallel steel triangular side wing plates 16, wherein the steel triangular side wing plates 16 are vertically fixedly connected to the steel square web plate 15 and the pier end joint plate 18.

[0051] The steel square web plate 15 is provided with threaded holes for the end rod 2 to pass through; there are two high-strength nuts 19, located on both sides of the steel square web plate 15 respectively. The high-strength nuts 19 are engaged with the first external thread of the end rod 2 to fix the energy-consuming steel rod body 1 to the steel square web plate 15.

[0052] The steel square web plate 15, the steel triangular side wing plate 16, and the pier end joint plate 18 are welded together to form a whole steel structure, which effectively prevents buckling distortion of the pier end connector 23 and increases the connection stiffness of the structure.

[0053] The pier end connector 24 connects the top of the self-resetting energy dissipation steel bar assembled outside the pier to the pier column 21.

[0054] The working principle of the self-resetting energy dissipation steel bar structure assembled outside the pier provided by this invention is as follows:

[0055] The self-resetting energy dissipation steel bar structure assembled outside the pier is spliced ​​and installed on the pier structure. The installation steps are as follows: the pier end connector 23 is fixed to the side of the pier 21 by the pier end connector bolt 17, the end bar 2 passes through the steel square web 15 and is clamped on both sides by high-strength nuts 19, the tail of the energy dissipation steel bar body 1 is connected to the end of the rotating rod 6 by the middle connector 7; one side of the rotating cover 10 is stuck with the rotating rod 6, and the other side is tightened to the pier end connector 24. The pier end connector 24 is fixed to the top surface of the pier 22 by the pier end connector bolt 20.

[0056] Under earthquake action, the pier column 21 will rotate to a certain extent. The spatial rotation of the rotating rod 6 and the expansion and contraction deformation of the energy-dissipating steel bar body 1 provide the overall structural displacement requirements, and at the same time absorb and dissipate the seismic energy of the pier structure, thereby improving the energy dissipation capacity and seismic performance of the pier.

[0057] Meanwhile, the self-resetting energy dissipation steel bar structure assembled outside the pier provided by the present invention will mainly suffer damage to the main body 1 of the energy dissipation steel bar after an earthquake. If the energy dissipation steel bar structure is damaged, only the damaged main body 1 of the energy dissipation steel bar can be replaced, and the two ends do not need to be replaced together with the main body 1 of the energy dissipation steel bar.

[0058] The technical solutions of the present invention have been fully described above. It should be noted that the specific embodiments of the present invention are not limited to the above description. All technical solutions formed by those skilled in the art based on the spirit and essence of the present invention by adopting equivalent transformations or equivalent transformations in terms of structure, method or function fall within the protection scope of the present invention.

Claims

1. A self-resetting energy dissipation steel bar structure assembled externally for use as an external connection between the pier column and the foundation, characterized in that, The self-resetting energy-dissipating steel bar structure assembled outside the pier includes a pier end connector, an energy-dissipating steel bar body, a rotating rod, and a pier cap end connector connected in sequence. The pier end connector is connected to the pier. The first end of the energy-dissipating steel bar body is fixedly connected to the pier end connector, and the second end is connected to the first end of the rotating rod through a middle connector. The second end of the rotating rod is connected to the pier cap end connector through a rotating cover, and the pier cap end connector is connected to the pier cap. The main body of the energy-consuming steel bar includes an end bar, a middle necked bar, and a tail bar connected in sequence. The outer sides of the end bar and the tail bar are provided with a first external thread. The outer diameter of the middle necked bar is smaller than the outer diameter of the end bar and the tail bar. The outer side of the middle necked bar is wrapped with a ring-shaped damper. The rotating rod includes a rod body, a second external thread at the first end of the rod body, a central connector that is a built-in threaded steel sleeve, the second external thread of the rod body being threadedly connected to one end of the central connector, and a rod tail hinge ball at the second end of the rod body; the rotating cover is sleeved on the outside of the rod tail hinge ball and is threadedly connected to the bearing end connector via a threaded joint.

2. The self-resetting energy dissipation steel bar structure assembled outside the pier according to claim 1, characterized in that, The end joint ball is made of high-strength steel.

3. The self-resetting energy dissipation steel bar structure assembled outside the pier according to claim 2, characterized in that, The rotating cover has a hollow interior to accommodate the rod end hinge ball; the rotating cover has a threaded hole matching the threaded joint on the side near the support end connector, and the other side of the rotating cover has a "trumpet-shaped" opening, with the small diameter end of the opening located away from the middle connector, and the diameter of the small diameter end of the opening is smaller than the diameter of the rod end hinge ball.

4. The self-resetting energy dissipation steel bar structure assembled outside the pier according to claim 3, characterized in that, The threaded joint has a hemispherical rotating groove on one side, and the curvature of the rotating groove is consistent with that of the rod end hinge ball; the other side of the threaded joint is fixedly connected to the bearing end connector.

5. The self-resetting energy dissipation steel bar structure assembled outside the pier according to claim 4, characterized in that, The pedestal end connector includes a connecting block, a pedestal end bonding plate, and a pedestal end connector bolt. The connecting block is located at the center of the pedestal end bonding plate. One side of the connecting block is fixedly connected to the threaded joint, and the other side of the connecting block is fixedly connected to the pedestal end bonding plate. The pedestal end bonding plate is fixedly connected to the top surface of the pedestal by the pedestal end connector bolt.

6. The self-resetting energy dissipation steel bar structure assembled outside the pier according to claim 5, characterized in that, The pier end connector includes a steel square web, a steel triangular side wing plate, a pier end connector bolt, a pier end joining plate, and a high-strength nut; the pier end joining plate is provided with bolt holes for the pier end connector bolt to pass through, so as to fix the pier end connector bolt to the side of the pier. The steel square web is located in the middle of the pier end joint plate and is perpendicularly and fixedly connected to the pier end joint plate. Two triangular side wing plate groups are symmetrically arranged along the steel square web. Each of the triangular side wing plate groups includes two parallel triangular side wing plates, wherein the triangular side wing plates are vertically and fixedly connected to the steel square web plate and the pier end joint plate; The steel square web is provided with threaded holes for the end rod to pass through; there are two high-strength nuts, located on both sides of the steel square web respectively, and the high-strength nuts are engaged with the first external thread of the end rod to fix the energy-consuming steel rod body to the steel square web.

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