Large-span arch bridge arch support connecting node with bearing, energy consumption and recovery cooperation mechanism

Abstract

The invention discloses a large-span arch bridge arch support connecting joint with a bearing, energy consumption and recovery cooperation mechanism. The large-span arch bridge arch support connecting joint comprises a connecting unit, an energy consumption unit and a self-resetting unit. Each connecting unit comprises an arch rib connecting end plate, a cross brace connecting end plate and a middle force bearing assembly; the arch rib connecting end plates are fixedly connected to the arch ribs; the transverse support connecting end plate is fixedly connected to the transverse support; the middle force bearing assembly is arranged between the arch rib connecting end plate and the cross brace connecting end plate; the energy consumption unit is arranged between the arch rib connecting end plate and the cross brace connecting end plate; and the self-resetting unit is arranged between the arch rib connecting end plate and the cross brace connecting end plate. The connecting unit, the energy consumption unit and the self-resetting unit are integrated, effective cooperation of three mechanisms of bearing, energy consumption and self-resetting is achieved, the working state can be adjusted in a self-adaptive mode according to the earthquake intensity, the bearing performance is guaranteed during small earthquakes, energy consumption and self-resetting are achieved during medium earthquakes and large earthquakes, and the anti-seismic performance of the large-span arch bridge is comprehensively improved.

Description

Technical Field

[0001] This invention relates to the field of bridge seismic resistance technology, and more specifically to a large-span arch bridge arch support connection node with a coordinated mechanism for load bearing, energy dissipation, and recovery. Background Technology

[0002] Long-span arch bridges, as an important structural form in bridge engineering, are widely used in transportation construction in complex terrains such as rivers and canyons due to their advantages of strong span capacity, beautiful appearance, and good economy. The connection node between the arch rib and the cross brace is the core force-transmitting component of a long-span arch bridge, which plays a vital role in transmitting the axial force, lateral shear force, and bending moment of the arch rib. Its structural performance directly determines the overall stability and seismic safety of the main arch structure.

[0003] Under seismic loading, long-span arch bridges exhibit complex spatial vibration responses. The arch-bracing joints must withstand repeated alternating tensile, compressive, shear, and torsional loads, and their performance directly determines the overall stability and collapse resistance of the main arch structure. Traditional arch-bracing connections for long-span arch bridges typically employ rigid connections or single energy-dissipating connections. While rigid connections ensure load-bearing capacity and stiffness under normal use, they are prone to brittle failure in the joint area under strong earthquakes, resulting in significant residual deformation and difficult repair. Single energy-dissipating connections, although capable of dissipating energy through plastic deformation, often reduce the overall stiffness of the structure, leading to excessive deformation under minor earthquakes, and similarly failing to address post-earthquake recovery. Therefore, developing an arch-bracing joint capable of coordinating load-bearing, energy dissipation, and self-recovery mechanisms, and adapted to the structural characteristics of long-span arch bridges, has become a pressing technical challenge in the field of bridge seismic resistance. Summary of the Invention

[0004] In view of this, the present invention provides a large-span arch bridge arch support connection node with a load-bearing, energy-dissipating, and recovery coordination mechanism, in order to solve the problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A large-span arch bridge arch support connection node with a coordinated mechanism for load bearing, energy dissipation, and recovery includes: A connecting unit; the connecting unit includes an arch rib connecting end plate, a cross brace connecting end plate, and an intermediate load-bearing component; the arch rib connecting end plate is fixedly connected to the side of the arch rib near the cross brace; the cross brace connecting end plate is fixedly connected to the side of the cross brace near the arch rib; the intermediate load-bearing component is disposed between the arch rib connecting end plate and the cross brace connecting end plate, and is used to transmit the load between the arch rib and the cross brace; Energy dissipation unit; the energy dissipation unit is disposed between the arch rib connecting end plate and the cross brace connecting end plate, and is used to dissipate seismic energy through plastic deformation; Self-resetting unit; the self-resetting unit is disposed between the arch rib connecting end plate and the cross brace connecting end plate, and is used to generate a restoring force after the connecting node is deformed, driving the connecting node to return to its initial state.

[0006] Preferably, the intermediate load-bearing component includes a first web and a second web; the first web is fixedly connected to the side of the transverse brace connecting end plate near the side of the arch rib connecting end plate; the second web is fixedly connected to the side of the arch rib connecting end plate near the side of the transverse brace connecting end plate; first wing plates are symmetrically arranged on both sides of the middle portion of the first web; second wing plates are symmetrically arranged on both sides of the middle portion of the second web; the number of first wing plates and second wing plates are the same, and they are arranged in a one-to-one correspondence; the first web is fixedly connected to the second web by a web connecting plate and a first bolt; the first wing plate is fixedly connected to the corresponding second wing plate by a wing plate connecting plate and a second bolt.

[0007] Preferably, the first web plate and the first wing plate are provided with positioning grooves on the side near the arch rib connecting end plate; the second web plate and the second wing plate are provided with positioning blocks corresponding to the positioning grooves on the side near the cross brace connecting end plate.

[0008] Preferably, the connecting unit further includes multiple limiting and guiding components; the multiple limiting and guiding components are evenly distributed on both sides of the intermediate load-bearing component; each limiting and guiding component includes a guide rod and a guide sleeve; the guide rod is fixedly connected to the arch rib connecting end plate; the guide sleeve is fixedly connected to the cross brace connecting end plate; the guide sleeve has a guide groove inside; one end of the guide rod away from the arch rib connecting end plate is slidably connected to the guide groove; one end of the guide rod away from the arch rib connecting end plate has a limiting ring; the inner wall of the guide groove has a limiting groove adapted to the limiting ring.

[0009] Preferably, a first spring is provided in the limiting groove; the first spring is sleeved on the outside of the guide rod.

[0010] Preferably, the energy-consuming unit includes multiple horizontal energy-consuming steel plates and multiple vertical energy-consuming steel plates; the two ends of the horizontal energy-consuming steel plates are respectively fixedly connected to the horizontal brace connecting end plate and the arch rib connecting end plate by a first fixing plate and a third bolt; the two ends of the vertical energy-consuming steel plates are respectively fixedly connected to the horizontal brace connecting end plate and the arch rib connecting end plate by a second fixing plate and a fourth bolt.

[0011] Preferably, energy-dissipating holes are provided on both the transverse energy-dissipating steel plate and the vertical energy-dissipating steel plate.

[0012] Preferably, the horizontal energy-consuming steel plate and the vertical energy-consuming steel plate have a wavy, rhomboid, or straight structure.

[0013] Preferably, the self-resetting unit includes a self-resetting element and a connecting seat; the two ends of the self-resetting element are respectively fixedly connected to the cross brace connecting end and the arch rib connecting end through the connecting seat.

[0014] Preferably, the self-resetting element is a shape memory alloy rod or a superelastic alloy rod.

[0015] The present invention achieves the following technical effects compared to the prior art: This invention integrates the connection unit, energy dissipation unit, and self-resetting unit into one unit, with the three working together to achieve effective coordination of the three mechanisms of load bearing, energy dissipation, and self-resetting. It solves the limitations of the single function of existing nodes and can adaptively adjust the working state according to the earthquake intensity. It ensures the load bearing performance during minor earthquakes and achieves energy dissipation and self-resetting during moderate and major earthquakes, thus comprehensively improving the seismic performance of long-span arch bridges. Attached Figure Description

[0016] Figure 1 This is a front view of a large-span arch bridge arch support connection node with a load-bearing, energy-dissipating, and recovery coordination mechanism according to the present invention. Figure 2 This is a top view of a large-span arch bridge arch support connection node with a load-bearing, energy-dissipating, and recovery coordination mechanism according to the present invention; Figure 3 This is a structural schematic diagram of the intermediate load-bearing component; Figure 4 This is a schematic diagram of the limit guide assembly; In the diagram: 1. Arch rib; 2. Horizontal brace; 3. Connecting unit; 31. Arch rib connecting end plate; 32. Horizontal brace connecting end plate; 33. Intermediate load-bearing component; 331. First web plate; 332. Second web plate; 333. First wing plate; 334. Second wing plate; 335. Web plate connecting plate; 336. First bolt; 337. Wing plate connecting plate; 338. Second bolt; 34. Limiting guide component; 341. Guide rod; 342. Guide sleeve; 343. Limiting ring; 344. Limiting groove; 345. First spring; 4. Energy dissipation unit; 41. Horizontal energy dissipation steel plate; 42. Vertical energy dissipation steel plate; 43. First fixing plate; 44. Third bolt; 45. Second fixing plate; 46. Fourth bolt; 47. Energy dissipation hole; 5. Self-resetting unit; 51. Self-resetting element; 52. Connecting seat. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example

[0019] Reference Figure 1-4 As shown, this invention discloses a large-span arch bridge arch support connection node with a coordinated mechanism for load bearing, energy dissipation, and recovery, comprising: Connection unit 3; Connection unit 3 includes arch rib connecting end plate 31, cross brace connecting end plate 32 and intermediate load-bearing component 33; Arch rib connecting end plate 31 is fixedly connected to the side of arch rib 1 near cross brace 2; Cross brace connecting end plate 32 is fixedly connected to the side of cross brace 2 near arch rib 1; Intermediate load-bearing component 33 is disposed between arch rib connecting end plate 31 and cross brace connecting end plate 32, and is used to transmit the load between arch rib 1 and cross brace 2; Energy dissipation unit 4; Energy dissipation unit 4 is disposed between the arch rib connecting end plate 31 and the cross brace connecting end plate 32, and is used to dissipate seismic energy through plastic deformation; Self-resetting unit 5; The self-resetting unit 5 is disposed between the arch rib connecting end plate 31 and the cross brace connecting end plate 32, and is used to generate a restoring force after the connecting node is deformed, driving the connecting node to return to the initial state.

[0020] The above technical solution forms a collaborative working system through the cooperation of connecting unit 3, energy dissipation unit 4 and self-resetting unit 5. Under minor earthquakes, both energy dissipation unit 4 and self-resetting unit 5 are in an elastic state, and connecting unit 3 alone bears the main load, enhances the strength of the connection node between the arch rib and the cross brace, improves the overall bearing capacity of the main arch structure, and ensures that the normal function of the bridge is not affected. Under moderate or major earthquakes, energy dissipation unit 4 enters the yielding stage first and dissipates the earthquake input energy through plastic deformation. At the same time, self-resetting unit 5 generates restoring force after the node deforms, driving the arch rib to return to its initial position, significantly reducing the residual displacement of the long-span arch bridge and improving the post-earthquake functional recovery capability.

[0021] In this embodiment, the intermediate load-bearing component 33 includes a first web plate 331 and a second web plate 332; the first web plate 331 is fixedly connected to the side of the cross brace connecting end plate 32 near the arch rib connecting end plate 31; the second web plate 332 is fixedly connected to the side of the arch rib connecting end plate 31 near the cross brace connecting end plate 32; the first web plate 331 has symmetrically arranged first wing plates 333 on both sides of its middle portion; the second web plate 332 has symmetrically arranged second wing plates 334 on both sides of its middle portion; the number of first wing plates 333 and second wing plates 334 are the same and they are arranged in a one-to-one correspondence; the first web plate 331 is fixedly connected to the second web plate 332 through a web plate connecting plate 335, a first nut and a first bolt 336; the first wing plate 333 is fixedly connected to the corresponding second wing plate 334 through a wing plate connecting plate 337, a second nut and a second bolt 338.

[0022] In this embodiment, the first web plate 331 and the first wing plate 333 are provided with positioning grooves on the side near the arch rib connecting end plate 31; the second web plate 332 and the second wing plate 334 are provided with positioning blocks corresponding to the positioning grooves on the side near the cross brace connecting end plate 32; during installation, the positioning blocks are inserted into the corresponding positioning grooves to achieve quick positioning and installation.

[0023] In this embodiment, the connecting unit 3 further includes multiple limiting and guiding components 34, used to limit the relative displacement direction and amount between the arch rib connecting end plate 31 and the cross brace connecting end plate 32, to prevent the node from becoming unstable and damaged; the multiple limiting and guiding components 34 are evenly distributed on both sides of the intermediate load-bearing component 33; the limiting and guiding component 34 includes a guide rod 341 and a guide sleeve 342; the guide rod 341 is fixedly connected to the arch rib connecting end plate 31; the guide sleeve 342 is fixedly connected to the cross brace connecting end plate 32; the guide sleeve 342 has a guide groove inside; the guide rod 341 is located away from the arch rib connecting end plate 31. The guide rod 341 is slidably connected to the guide groove to ensure that the guide rod can slide freely in the guide sleeve, while limiting the horizontal and vertical displacement of the node to prevent the node from torsional deformation. A limiting ring 343 is provided at the end of the guide rod 341 away from the arch rib connecting end plate 31. A limiting groove 344 adapted to the limiting ring 343 is opened on the inner wall of the guide groove. The limiting ring 343 is slidably connected in the limiting groove 344 to limit the maximum sliding stroke of the guide rod 341, thereby limiting the maximum relative displacement between the arch rib connecting end plate and the cross brace connecting end plate, and preventing excessive displacement from damaging the energy dissipation unit and the self-resetting unit.

[0024] In this embodiment, a first spring 345 is provided in the limiting groove 344; one end of the first spring 345 abuts against the side of the limiting ring 343 near the arch rib connecting end plate 31, and the other end of the first spring 345 abuts against the inner wall of the limiting groove 344; the first spring 345 is sleeved on the outside of the guide rod 341.

[0025] In this embodiment, the cross brace connecting end plate 32 is provided with a cross brace connecting groove adapted to the cross brace 2 in the middle of the side near the cross brace 2; one end of the cross brace 2 near the cross brace connecting end plate 32 is inserted into the cross brace connecting groove and welded to the cross brace connecting end plate 32.

[0026] In this embodiment, the energy-consuming unit 4 includes multiple horizontal energy-consuming steel plates 41 and multiple vertical energy-consuming steel plates 42; the two ends of the horizontal energy-consuming steel plates 41 are fixedly connected to the horizontal brace connecting end plate 32 and the arch rib connecting end plate 31 respectively by the first fixing plate 43 and the third bolt 44; the two ends of the vertical energy-consuming steel plates 42 are fixedly connected to the horizontal brace connecting end plate 32 and the arch rib connecting end plate 31 respectively by the second fixing plate 45 and the fourth bolt 46.

[0027] In this embodiment, energy-dissipating pads are provided between the third bolt 44 and the first fixing plate 43, and between the fourth bolt 46 and the second fixing plate 45, to distribute the force on the third bolt 44 and the fourth bolt 46 and avoid excessive local stress on the horizontal and vertical energy-dissipating steel plates, which could lead to damage.

[0028] In this embodiment, energy-dissipating holes 47 are provided on both the transverse energy-dissipating steel plate 41 and the vertical energy-dissipating steel plate 42 to optimize the stress distribution of the transverse energy-dissipating steel plate 41 and the vertical energy-dissipating steel plate 42, so that the energy-dissipating steel plate can undergo uniform plastic deformation, avoiding local stress concentration that could lead to premature fracture of the energy-dissipating steel plate. At the same time, the energy-dissipating holes can also increase the amount of plastic deformation of the energy-dissipating steel plate and improve the energy consumption efficiency of the energy-dissipating unit.

[0029] In this embodiment, the horizontal energy-consuming steel plate 41 and the vertical energy-consuming steel plate 42 have a wavy, rhomboid, or straight structure.

[0030] In this embodiment, the self-resetting unit 5 includes a self-resetting element 51 and a connecting seat 52; the two ends of the self-resetting element 51 are respectively fixedly connected to the connecting end of the cross brace 2 and the connecting end of the arch rib 1 through the connecting seat 52.

[0031] In this embodiment, the self-resetting element 51 is a shape memory alloy rod or a superelastic alloy rod, and its length is determined according to the maximum design displacement of the node, so as to ensure that the self-resetting element can still maintain good shape memory effect and superelastic performance when the node generates maximum displacement.

[0032] In this embodiment, the two ends of the self-resetting unit 5 are fixedly connected to the connecting seat 52 by means of threaded connection or welding.

[0033] In this embodiment, the web plate connecting plate 335 is provided with a first friction energy dissipation element on the side near the first web plate 331 for friction energy dissipation; the first web plate 331 is provided with a first elongated hole adapted to the first bolt 336 for limiting the movement during energy dissipation; the web plate connecting plate 335 is also provided with a first elongated hole at the corresponding position; the wing plate connecting plate 337 is provided with a second friction energy dissipation element on the side near the first wing plate 333 for friction energy dissipation; the second wing plate 334 is provided with a second elongated hole adapted to the second bolt for limiting the movement during energy dissipation; the wing plate connecting plate 33 is also provided with a second elongated hole at the corresponding position.

[0034] In this embodiment, a first reinforcing rib is fixedly connected at the connection between the cross brace connecting end plate 32 and the cross brace 2 to improve the connection between the cross brace connecting end plate 32 and the cross brace 2; a second reinforcing rib is fixedly connected at the connection between the arch rib connecting end plate 31 and the arch rib 1.

[0035] In some other embodiments, an installation groove is provided on the inner wall of the guide groove on the side away from the arch rib connecting end plate 31; a second spring is provided in the installation groove; the other end of the second spring is fixedly connected to the end of the guide rod 341 away from the arch rib connecting end plate 31.

[0036] In other embodiments, the third bolt 44 and the fourth bolt 46 are high-strength friction bolts. In other embodiments, the energy dissipation pad is an elastic pad made of rubber or polyurethane material, which has good elasticity and cushioning properties. It can absorb some vibration energy when the energy dissipation steel plate undergoes plastic deformation, while preventing the energy dissipation bolts from loosening due to vibration, thus ensuring the long-term working stability of the energy dissipation component.

[0037] The working principle of this invention is as follows: (1) Under small earthquake action: The earthquake load is small, and the tensile, compressive and shear loads on the node do not reach the yield bearing capacity of the energy dissipation unit 4. Therefore, the energy dissipation unit 4 and the self-resetting unit 5 are in an elastic state and do not play the role of energy dissipation and resetting. At this time, the connecting unit 3 bears the main load alone. Through the coordinated work of the arch rib connecting end plate 31, the intermediate bearing component 33 and the cross brace connecting end plate 32, the axial force, shear force and bending moment between the arch rib 1 and the cross brace 2 are effectively transmitted. At the same time, the limiting guide component 34 restricts the small displacement of the node, enhances the strength and stiffness of the node, improves the overall lateral stiffness and bearing capacity of the main arch structure, and ensures that the normal use function of the bridge is not affected.

[0038] (2) Under moderate earthquake: The earthquake load increases and the load on the node reaches the yield bearing capacity of the energy dissipation unit 4. At this time, the energy dissipation unit 4 enters the yield stage first, and the energy dissipation steel plate undergoes plastic deformation, dissipating a large amount of energy input by the earthquake. The connecting unit 3 is still in an elastic state and continues to bear the load transmission function to ensure the overall stability of the main arch structure. The self-resetting unit 5 begins to produce small elastic deformation, and the self-resetting element 51 is slightly stretched or compressed to prepare for the subsequent reset work and avoid excessive damage to the main structure.

[0039] (3) Under the action of a major earthquake: the seismic load further increases, the energy dissipation unit 4 continues to undergo plastic deformation, maximizes the dissipation of seismic energy, avoids the transmission of seismic energy to the main structure such as the arch rib and pier, protects the safety of the main structure, and the node produces a large displacement. When the displacement reaches the working displacement of the self-resetting unit 5, the self-resetting element 51 fully utilizes the hyperelasticity and shape memory effect to generate a stable self-resetting force, driving the arch rib connecting end plate 31 and the cross brace connecting end plate 32 to return to the initial position. At the same time, the limiting guide component 34 limits the maximum displacement of the node, avoids excessive displacement that could damage the energy dissipation unit 4 and the self-resetting unit 5, prevents node connection failure, and ensures that the main arch structure does not collapse.

[0040] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A large-span arch bridge support connection node with a coordinated mechanism for load bearing, energy dissipation, and recovery, characterized in that, include: Connection unit (3); The connection unit (3) includes an arch rib connection end plate (31), a cross brace connection end plate (32) and an intermediate load-bearing component (33); The arch rib connection end plate (31) is fixedly connected to the side of the arch rib (1) near the cross brace (2); The cross brace connection end plate (32) is fixedly connected to the side of the cross brace (2) near the arch rib (1); The intermediate load-bearing component (33) is disposed between the arch rib connection end plate (31) and the cross brace connection end plate (32) for transmitting the load between the arch rib (1) and the cross brace (2); Energy dissipation unit (4); The energy dissipation unit (4) is disposed between the arch rib connecting end plate (31) and the cross brace connecting end plate (32) and is used to dissipate seismic energy through plastic deformation; Self-resetting unit (5); The self-resetting unit (5) is disposed between the arch rib connecting end plate (31) and the cross brace connecting end plate (32) and is used to generate a restoring force after the connecting node is deformed, driving the connecting node to return to the initial state.

2. The arch support connection node for a large-span arch bridge with a coordinated mechanism for load bearing, energy dissipation, and recovery as described in claim 1, characterized in that, The intermediate load-bearing component (33) includes a first web plate (331) and a second web plate (332); the first web plate (331) is fixedly connected to the side of the cross brace connecting end plate (32) near the side of the arch rib connecting end plate (31); the second web plate (332) is fixedly connected to the side of the arch rib connecting end plate (31) near the side of the cross brace connecting end plate (32); the first web plate (331) has first wing plates (333) symmetrically arranged on both sides of the middle part; the second web plate (332) has second wing plates (334) symmetrically arranged on both sides of the middle part; the number of first wing plates (333) and second wing plates (334) is the same and they are arranged in a one-to-one correspondence; the first web plate (331) is fixedly connected to the second web plate (332) through a web plate connecting plate (335) and a first bolt (336); the first wing plate (333) is fixedly connected to the corresponding second wing plate (334) through a wing plate connecting plate (337) and a second bolt (338).

3. The arch support connection node for a large-span arch bridge with a coordinated mechanism for load bearing, energy dissipation, and recovery as described in claim 2, is characterized in that... The first web plate (331) and the first wing plate (333) are provided with positioning grooves on the side near the arch rib connecting end plate (31); the second web plate (332) and the second wing plate (334) are provided with positioning blocks corresponding to the positioning grooves on the side near the cross brace connecting end plate (32).

4. The arch support connection node for a large-span arch bridge with a coordinated mechanism for load bearing, energy dissipation, and recovery as described in claim 1, characterized in that, The connecting unit (3) further includes multiple limiting guide components (34); the multiple limiting guide components (34) are evenly distributed on both sides of the intermediate load-bearing component (33); the limiting guide component (34) includes a guide rod (341) and a guide sleeve (342); the guide rod (341) is fixedly connected to the arch rib connecting end plate (31); the guide sleeve (342) is fixedly connected to the cross brace connecting end plate (32); the guide sleeve (342) is provided with a guide groove inside; the end of the guide rod (341) away from the arch rib connecting end plate (31) is slidably connected to the guide groove; the end of the guide rod (341) away from the arch rib connecting end plate (31) is provided with a limiting ring (343); the inner wall of the guide groove is provided with a limiting groove (344) that matches the limiting ring (343).

5. The arch support connection node for a large-span arch bridge with a coordinated mechanism for load bearing, energy dissipation, and recovery as described in claim 4, characterized in that, The limiting groove (344) is provided with a first spring (345); the first spring (345) is sleeved on the outside of the guide rod (341).

6. The arch support connection node for a large-span arch bridge with a coordinated mechanism for load bearing, energy dissipation, and recovery as described in claim 1, characterized in that, The energy-consuming unit (4) includes multiple horizontal energy-consuming steel plates (41) and multiple vertical energy-consuming steel plates (42); the two ends of the horizontal energy-consuming steel plates (41) are fixedly connected to the horizontal brace connecting end plate (32) and the arch rib connecting end plate (31) respectively by the first fixing plate (43) and the third bolt (44); the two ends of the vertical energy-consuming steel plates (42) are fixedly connected to the horizontal brace connecting end plate (32) and the arch rib connecting end plate (31) respectively by the second fixing plate (45) and the fourth bolt (46).

7. The arch support connection node for a large-span arch bridge with a coordinated mechanism for load bearing, energy dissipation, and recovery as described in claim 6, characterized in that, Energy-dissipating holes (47) are provided on both the horizontal energy-dissipating steel plate (41) and the vertical energy-dissipating steel plate (42).

8. The arch support connection node for a large-span arch bridge with a coordinated mechanism for load bearing, energy dissipation, and recovery as described in claim 6, characterized in that, The horizontal energy-consuming steel plate (41) and the vertical energy-consuming steel plate (42) are wavy, rhomboid or straight structures.

9. The arch support connection node for a large-span arch bridge with a coordinated mechanism for load bearing, energy dissipation, and recovery as described in claim 1, characterized in that, The self-resetting unit (5) includes a self-resetting element (51) and a connecting seat (52); the two ends of the self-resetting element (51) are respectively fixedly connected to the connecting end of the cross brace (2) and the connecting end of the arch rib (1) through the connecting seat (52).

10. A large-span arch bridge arch support connection node with a load-bearing, energy-dissipating, and recovery coordination mechanism as described in claim 9, characterized in that, The self-resetting element (51) is made of shape memory alloy rod or superelastic alloy rod.

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