Self-centering energy dissipation device

Abstract

This invention relates to the field of bridge seismic resistance technology, and in particular to a self-resetting energy dissipation device. It includes: a pier connection unit, a beam connection unit, an energy dissipation unit, and a first reset unit; the pier connection unit is disposed at the top of the pier; the beam connection unit is disposed at the bottom of the beam; the energy dissipation unit is a structural component made of steel plate, and the pier connection unit is connected to the beam connection unit through the energy dissipation unit. When an earthquake causes horizontal displacement of the beam connection unit relative to the pier connection unit, it dissipates the input seismic energy through plastic deformation; the first reset unit includes a first reset mechanism and a first pre-tensioned strand, which are elastically connected between the pier connection unit and the beam connection unit. When the earthquake ends, the first reset mechanism releases stored elastic potential energy to provide a restoring force, allowing the beam connection unit to return to its initial position relative to the pier connection unit, thereby reducing the residual displacement of the structure.

Description

Technical Field

[0001] This invention relates to the field of bridge seismic resistance technology, and in particular to a self-resetting energy dissipation device. Background Technology

[0002] As transportation infrastructure extends into high-intensity earthquake zones and complex geological areas, the number of long-span bridges continues to increase, significantly raising the safety risks of bridges under dynamic loads such as earthquakes, strong winds, and vehicle impacts.

[0003] To improve post-earthquake functional recovery capabilities, self-resetting energy-dissipating support systems have been proposed both domestically and internationally. These systems typically consist of an energy-dissipating system (e.g., a variable damping viscous damper) and a self-resetting system (e.g., shape memory alloy (SMA) material or a single pre-stretched strand).

[0004] in, Variable damping viscous dampers exhibit good energy dissipation capacity under tensile and compressive cyclic loading. However, due to the high manufacturing requirements of magnetorheological fluid dampers, they are difficult to promote in engineering applications. Shape memory alloys (SMAs) possess excellent superelasticity and shape recovery capabilities, achieving self-resetting under cyclic loading through a phase transformation mechanism. However, SMAs are expensive, especially for large-diameter or large-section components, where material costs increase significantly. Furthermore, the mechanical properties of SMAs are significantly affected by ambient temperature; when the ambient temperature approaches or exceeds their phase transformation temperature range, their superelastic properties may degrade or even fail. In structural engineering projects such as bridges, which are exposed to the natural environment for extended periods, temperature fluctuations, humidity changes, and corrosive environments can lead to material performance degradation, thus affecting the long-term stability and reliability of the structure. Therefore, their application in large-scale bridge engineering is limited by economic considerations and environmental adaptability. Single prestressed strand structures can provide restoring force to the components by applying initial prestress, achieving a certain degree of self-resetting function after the structure is subjected to stress. However, this type of structure requires high precision in construction tension control, and the magnitude of the prestress must be precisely controlled; otherwise, problems of insufficient or excessive prestress may occur, which means that the technical requirements for anchoring are high. In summary, existing bridge self-resetting energy dissipation devices still have shortcomings in terms of structural adaptability, engineering scalability, and economy, making it difficult to achieve reliable self-resetting function while ensuring stable energy dissipation capacity. Therefore, constructing a bridge self-resetting energy dissipation device that combines energy dissipation and self-resetting capabilities, has a relatively simple structure, and controllable engineering costs is the technical problem that this invention urgently needs to solve. Summary of the Invention

[0005] This invention provides a self-resetting energy dissipation device to solve the technical problem of how to construct a bridge self-resetting energy dissipation structure that combines energy dissipation and self-resetting capabilities, has a relatively simple structure, and has controllable engineering costs.

[0006] The above-mentioned objectives of the present invention can be achieved by the following technical solutions: This invention provides a self-resetting energy dissipation device, comprising: a pier connection unit, a beam connection unit, an energy dissipation unit, and a first reset unit; the pier connection unit is disposed at the top of the pier; the beam connection unit is disposed at the bottom of the beam; the energy dissipation unit is a structural component made of steel plate, and the pier connection unit is connected to the beam connection unit through the energy dissipation unit, used to dissipate the input seismic energy through plastic deformation when an earthquake causes the beam connection unit to undergo horizontal displacement relative to the pier connection unit; the first reset unit includes a first reset mechanism and a first pre-tensioned strand, the first reset mechanism and the first pre-tensioned strand being elastically connected between the pier connection unit and the beam connection unit, used to provide a restoring force by releasing stored elastic potential energy when the earthquake ends, so that the beam connection unit returns to its initial position relative to the pier connection unit, thereby reducing the residual displacement of the structure.

[0007] According to one embodiment of the present invention, the pier connection unit includes a pier connection section and a first reset connection section; the pier connection section extends along a first direction and is disposed on the top of the pier; the pier connection section includes a first end and a second end; the first direction is perpendicular to the longitudinal axis of the beam; the first reset connection section is disposed at the first end and protrudes from the side wall of the pier connection section; the first pre-tensioned strand and the first reset mechanism are elastically connected between the side wall of the first reset connection section and one end of the beam connection unit.

[0008] According to one embodiment of the present invention, the first reset mechanism includes a first guide sleeve, a first elastic component, a first stop block, and a second stop block; the first guide sleeve is disposed along the first direction; the first elastic component is slidably sleeved on the first guide sleeve and sandwiched between the first stop block and the second stop block; the first stop block is slidably sleeved on the first guide sleeve and connected to the side wall of the first reset connecting section; the second stop block is slidably sleeved on the first guide sleeve and connected to one end of the beam connecting unit; one end of the first pre-stretched wire is connected to the first stop block, and the other end of the first pre-stretched wire is connected to the second stop block.

[0009] According to one embodiment of the present invention, a second reset unit is further included, which is elastically connected between the other end of the beam connecting unit and the second end.

[0010] According to one embodiment of the present invention, the pier connection unit further includes a second reset connection section, which is disposed at the second end and protrudes from the side wall of the pier connection section; the second reset unit includes a second reset mechanism and a second pre-tensioned strand, which are elastically connected between the other end of the beam connection unit and the side wall of the second reset connection section.

[0011] According to one embodiment of the present invention, the second reset mechanism includes a second guide sleeve, a second elastic component, a third stop, and a fourth stop; the second guide sleeve is disposed along the first direction; the second elastic component is slidably sleeved on the second guide sleeve and sandwiched between the third stop and the fourth stop; the third stop is slidably sleeved on the second guide sleeve and connected to the side wall of the second reset connecting section; the fourth stop is slidably sleeved on the second guide sleeve and connected to the other end of the beam connecting unit; one end of the second pre-tensioned strand is connected to the third stop, and the other end of the second pre-tensioned strand is connected to the fourth stop.

[0012] According to one embodiment of the present invention, the first elastic member and the second elastic member are disc springs.

[0013] According to one embodiment of the present invention, the energy-consuming unit includes a connecting steel plate, a first energy-consuming steel plate, and a second energy-consuming steel plate; the connecting steel plate extends along the first direction; the first energy-consuming steel plate is sandwiched between the upper end of the connecting steel plate and the beam connection unit; and the second energy-consuming steel plate is sandwiched between the lower end of the connecting steel plate and the pier connection section.

[0014] According to one embodiment of the present invention, the energy-consuming unit further includes a third energy-consuming steel plate and a fourth energy-consuming steel plate; the third energy-consuming steel plate is sandwiched between the upper end of the connecting steel plate and the beam connection unit; the fourth energy-consuming steel plate is sandwiched between the lower end of the connecting steel plate and the pier connection section.

[0015] According to one embodiment of the present invention, the first to the fourth energy-consuming steel plates are configured as a "U"-shaped structure with the opening facing the horizontal direction, and the openings of the first and third energy-consuming steel plates are arranged facing each other; the openings of the second and fourth energy-consuming steel plates are also arranged facing each other.

[0016] The features and advantages of the self-resetting energy dissipation device of the present invention are as follows: The structure comprises a pier connection unit, a beam connection unit, an energy dissipation unit, and a first reset unit, wherein the first reset unit includes a first reset mechanism and a first pre-tensioned strand. The pier connection unit and the beam connection unit are connected via the energy dissipation unit. Under seismic loading, when the beam connection unit undergoes horizontal displacement relative to the pier connection unit, the energy dissipation unit undergoes plastic deformation, continuously absorbing the input energy; simultaneously, the first reset unit stores elastic potential energy during displacement. After the seismic loading ends, the stored elastic potential energy is released, generating a restoring force that drives the beam and pier to return to their initial relative positions, thereby significantly reducing the residual displacement of the structure. The energy dissipation unit and the first reset unit work in parallel. When the structure undergoes displacement, the former dissipates energy through plastic deformation, while the latter stores elastic potential energy to provide a restoring force. Their synergistic action ensures stable energy dissipation while achieving a reliable self-reset function. This design eliminates the need for expensive shape memory alloys or complex variable damping viscous dampers, resulting in a relatively simple structure and controllable engineering costs. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the invention in use; Figure 2 This is the front view of the present invention; Figure 3 This is a perspective view of the energy-consuming unit of the present invention; Figure 4 This is a perspective view of the first reset mechanism of the present invention; Figure 5 This is a front view of the first pre-stretched wire of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1000. Self-resetting energy dissipation device; 1. Pier connection unit; 11. Pier connection section; 111. First end; 112. Second end; 12. First reset connection section; 13. Second reset connection section; 2. Beam connection unit; 3. Energy dissipation unit; 31. Connecting steel plate; 32. First energy dissipation steel plate; 33. Second energy dissipation steel plate; 34. Third energy dissipation steel plate; 35. Fourth energy dissipation steel plate; 4. First reset unit; 41. First reset mechanism; 411. First guide sleeve; 412. First elastic component; 413. First stop block; 414. Second stop block; 42. First pre-tensioned strand; 5. Second reset unit; 2000, beam structure; 3000, bridge piers; F, First direction. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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 limiting this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] like Figures 1 to 5As shown, the present invention provides a self-resetting energy dissipation device 1000, comprising: a pier connection unit 1, a beam connection unit 2, an energy dissipation unit 3, and a first reset unit 4; the pier connection unit 1 is disposed on the top of the pier 3000; the beam connection unit 2 is disposed on the bottom of the beam 2000; the energy dissipation unit 3 is a structural component made of steel plate, and the pier connection unit 1 is connected to the beam connection unit 2 through the energy dissipation unit 3. The energy dissipation unit 3 is used to dissipate the input seismic energy through plastic deformation when an earthquake causes the beam connection unit 2 to undergo horizontal displacement relative to the pier connection unit 1; the first reset unit 4 includes a first reset mechanism 41 and a first pre-tensioned strand 42, which are elastically connected between the pier connection unit 1 and the beam connection unit 2. When the earthquake ends, the first reset mechanism 41 and the first pre-tensioned strand 42 provide a restoring force by releasing the stored elastic potential energy, so that the beam connection unit 2 returns to its initial position relative to the pier connection unit 1, thereby eliminating the residual displacement of the structure (beam 2000 and pier 3000).

[0024] In practical implementation, a pier connection unit 1, a beam connection unit 2, an energy dissipation unit 3, and a first reset unit 4 are set up, wherein the first reset unit 4 includes a first reset mechanism 41 and a first pre-tensioned strand 42. The pier connection unit 1 and the beam connection unit 2 are connected via the energy dissipation unit 3. Under seismic loading, when the beam connection unit 2 undergoes horizontal displacement relative to the pier connection unit 1, the energy dissipation unit 3 undergoes plastic deformation, continuously absorbing the input energy; simultaneously, the first reset unit 4 stores elastic potential energy during the displacement process. After the seismic loading ends, the stored elastic potential energy is released, generating a restoring force that drives the beam 2000 and the pier 3000 to return to their initial relative positions, thereby significantly reducing the residual displacement of the structure. The energy dissipation unit 3 and the first reset unit 4 work in parallel. When the structure undergoes displacement, the former dissipates energy through plastic deformation, while the latter stores elastic potential energy to provide a restoring force. The two work together to ensure stable energy dissipation capacity while achieving a reliable self-reset function. This design eliminates the need for expensive shape memory alloys or complex variable damping viscous dampers, resulting in a relatively simple structural construction and controllable engineering costs.

[0025] According to one embodiment of the present invention, the pier connection unit 1 includes a pier connection section 11 and a first reset connection section 12; the pier connection section 11 extends along a first direction F and is disposed on the top of the pier 3000; the pier connection section 11 includes a first end 111 and a second end 112; the first direction F is perpendicular to the longitudinal axis of the beam 2000; the first reset connection section 12 is disposed at the first end 111 and protrudes from the side wall of the pier connection section 11; a first pre-tensioned strand 42 and a first reset mechanism 41 are elastically connected between the side wall of the first reset connection section 12 and one end of the beam connection unit 2.

[0026] In specific implementation, a pier connecting section 11 and a first reset connecting section 12 are provided. The first reset connecting section 12 protrudes from the side wall of the pier connecting section 11 and forms a laterally arranged connection path with the beam connecting unit 2, so that the first pre-tensioned strand 42 and the first reset mechanism 41 establish a stable force transmission channel along the first direction F. The pier connecting section 11 and the first reset connecting section 12 play the role of "limiting the force direction and stabilizing the connection position", thereby achieving the effect of stable transmission of the reset force along the predetermined direction.

[0027] According to one embodiment of the present invention, the first reset mechanism 41 includes a first guide sleeve 411, a first elastic member 412, a first stop 413, and a second stop 414; the first guide sleeve 411 is disposed along a first direction F; the first elastic member 412 is slidably sleeved on the first guide sleeve 411 and sandwiched between the first stop 413 and the second stop 414; the first stop 413 is slidably sleeved on the first guide sleeve 411 and connected to the side wall of the first reset connecting section 12; the second stop 414 is slidably sleeved on the first guide sleeve 411 and connected to one end of the beam connecting unit 2; one end of the first pre-tensioned strand 42 is connected to the first stop 413, and the other end of the first pre-tensioned strand 42 is connected to the second stop 414.

[0028] In specific implementation, a first guide sleeve 411, a first elastic component 412, a first stop 413, a second stop 414, and a first pre-tensioned strand 42 are provided. The first elastic component 412 is sleeved on the first guide sleeve 411 and is held by the first stop 413 and the second stop 414. When the beam connecting unit 2 and the pier connecting unit 1 undergo relative displacement, the first stop 413 and the second stop 414 move relative to each other, compressing the first elastic component 412 and increasing its thrust, which in turn increases the tension borne by the first pre-tensioned strand 42. The first guide sleeve 411 constrains the movement path of each component. The first guide sleeve 411, the first elastic component 412, the first stop 413, the second stop 414, and the first pre-tensioned strand 42 together achieve the function of "coordinated energy storage under compression and tension", thereby continuously providing restoring force during the reciprocating displacement process.

[0029] According to one embodiment of the present invention, a second reset unit 5 is further included, which is elastically connected between the other end of the beam connecting unit 2 and the second end 112.

[0030] In specific implementation, a second reset unit 5 is set up and connected to the other end of the beam connection unit 2 and the second end 112 of the pier connection unit 1, respectively. The first reset unit 4 and the second reset unit 5 are distributed on both sides of the beam connection unit 2. During relative displacement, both sides participate in the force and provide their own reset force. The first reset unit 4 and the second reset unit 5 play the role of "symmetrical distribution and joint reset", thereby achieving a balanced distribution of reset force.

[0031] According to one embodiment of the present invention, the pier connection unit 1 further includes a second reset connection section 13, which is disposed at the second end 112 and protrudes from the side wall of the pier connection section 11; the second reset unit 5 includes a second reset mechanism and a second pre-tensioned strand, which are elastically connected between the other end of the beam connection unit 2 and the side wall of the second reset connection section 13.

[0032] In specific implementation, a second reset connecting section 13, a second reset mechanism, and a second pre-tensioned strand are provided. The second reset connecting section 13 forms a corresponding elastic connection path with the other end of the beam connection unit 2, enabling the second reset mechanism and the second pre-tensioned strand to establish the same force mechanism as the first reset unit 4 on the other side. The second reset connecting section 13, the second reset mechanism, and the second pre-tensioned strand function to "construct a double-sided reset path," thereby ensuring that the structure can provide restoring force under bidirectional displacement.

[0033] According to one embodiment of the present invention, the second reset mechanism includes a second guide sleeve, a second elastic component, a third stop, and a fourth stop; the second guide sleeve is disposed along a first direction F; the second elastic component is slidably sleeved on the second guide sleeve and sandwiched between the third stop and the fourth stop; the third stop is slidably sleeved on the second guide sleeve and connected to the side wall of the second reset connecting section 13; the fourth stop is slidably sleeved on the second guide sleeve and connected to the other end of the beam connecting unit 2; one end of the second pre-tensioned strand is connected to the third stop, and the other end of the second pre-tensioned strand is connected to the fourth stop.

[0034] In practical implementation, a second guide sleeve, a second elastic component, a third stop, a fourth stop, and a second pre-tensioned strand are provided. The second elastic component deforms under pressure between the third and fourth stopes, while the second pre-tensioned strand deforms under tension between them. The second guide sleeve guides and restricts its movement. The second guide sleeve, the second elastic component, the third stop, the fourth stop, and the second pre-tensioned strand work together under pressure and tension to ensure that the reset capability on the other side is consistent with that on the first side.

[0035] It is understandable that prestressed strands can be anchored using prestressed anchors.

[0036] According to one embodiment of the present invention, the first elastic member 412 and the second elastic member are disc springs.

[0037] In specific implementation, the first elastic component 412 and the second elastic component are configured as disc springs. When axially compressed, the disc spring can provide a stable elastic reaction force within a small stroke and allows multiple discs to be combined to adjust the stiffness. The first elastic component 412 and the second elastic component play the role of "stablely providing axial elastic force", thereby achieving the effect of adjustable and stable transmission of the restoring force.

[0038] According to one embodiment of the present invention, the energy-consuming unit 3 includes a connecting steel plate 31, a first energy-consuming steel plate 32, and a second energy-consuming steel plate 33; the connecting steel plate 31 extends along a first direction F; the first energy-consuming steel plate 32 is sandwiched between the upper end of the connecting steel plate 31 and the beam connecting unit 2; and the second energy-consuming steel plate 33 is sandwiched between the lower end of the connecting steel plate 31 and the pier connecting section 11.

[0039] In specific implementation, a connecting steel plate 31, a first energy-dissipating steel plate 32, and a second energy-dissipating steel plate 33 are installed. The first energy-dissipating steel plate 32 is sandwiched between the connecting steel plate 31 and the beam connection unit 2, and the second energy-dissipating steel plate 33 is sandwiched between the connecting steel plate 31 and the pier connection section 11. During relative displacement, the energy-dissipating steel plates on the upper and lower sides deform respectively, and the force is transmitted through the connecting steel plate 31. The connecting steel plate 31, the first energy-dissipating steel plate 32, and the second energy-dissipating steel plate 33 play the role of "layered transmission and sharing of deformation", thereby achieving the effect of multi-path energy dissipation.

[0040] According to one embodiment of the present invention, the energy-consuming unit 3 further includes a third energy-consuming steel plate 34 and a fourth energy-consuming steel plate 35; the third energy-consuming steel plate 34 is sandwiched between the upper end of the connecting steel plate 31 and the beam connecting unit 2; the fourth energy-consuming steel plate 35 is sandwiched between the lower end of the connecting steel plate 31 and the pier connecting section 11.

[0041] In specific implementation, a third energy-dissipating steel plate 34 and a fourth energy-dissipating steel plate 35 are further installed. Multiple sets of energy-dissipating steel plates are arranged in parallel, and during relative displacement, each energy-dissipating steel plate participates in deformation and shares the strain. The first energy-dissipating steel plate 32 to the fourth energy-dissipating steel plate 35 play the role of "multiple components jointly dissipating energy", thereby increasing the energy dissipation capacity as the number of components increases.

[0042] According to one embodiment of the present invention, the first energy-consuming steel plate 32 to the fourth energy-consuming steel plate 35 are configured as a "U"-shaped structure with the opening facing the horizontal direction, and the openings of the first energy-consuming steel plate 32 and the third energy-consuming steel plate 34 are arranged facing each other; the openings of the second energy-consuming steel plate 33 and the fourth energy-consuming steel plate 35 are arranged facing each other.

[0043] In practical implementation, the "U"-shaped structure dissipates energy primarily through the bending deformation of its web when subjected to relative shear displacement. Once the deformation enters the plastic stage, it provides stable and full hysteretic performance, thereby continuously and efficiently dissipating seismic energy during reciprocating displacement. The opposing arrangement ensures that adjacent components form a symmetrical stress state during displacement, which is beneficial for the stable performance of the device.

[0044] According to one embodiment of the present invention, a self-resetting energy dissipation device 1000 is provided, comprising: a pier connection unit 1, a beam connection unit 2, an energy dissipation unit 3, a first reset unit 4, and a second reset unit 5. This device is typically placed on top of the pier 3000, between two support pads. The energy dissipation unit 3 and the reset units (first reset unit 4 and second reset unit 5) are connected in parallel between the pier connection unit 1 and the beam connection unit 2.

[0045] Working principle explanation: When an earthquake occurs, the beam 2000 experiences a significant horizontal displacement relative to the pier 3000. Once this displacement exceeds the pre-reserved gap, the device begins to function. The beam connection unit 2 shifts relative to the pier connection unit 1, causing the energy-dissipating steel plate in the energy-dissipating unit 3 to deform.

[0046] Energy dissipation path: As the relative displacement increases, the deformation of the energy-dissipating steel plate reaches the yield threshold of its material (e.g., Q235 steel), and then enters the plastic stage, dissipating seismic energy through continuous plastic bending deformation. These energy-dissipating steel plates act like "fuses" and can be inspected or even replaced after the earthquake.

[0047] Self-resetting control path: Simultaneously with the relative displacement, the first reset unit 4 and the second reset unit 5 are compressed or stretched, and the elastic components (disc springs) within them undergo elastic deformation, while the pre-tensioned strands are stretched, collectively storing elastic potential energy. After the local earthquake ends, the stored elastic potential energy is released, providing sufficient restoring force to push the beam connection unit 2 and the pier connection unit 1 back to their initial positions, thereby effectively suppressing or eliminating residual plastic deformation of the structure.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-centering energy dissipation device, characterized by, include: Pier connection unit (1), beam connection unit (2), energy dissipation unit (3) and first reset unit (4); The pier connecting unit (1) is located on the top of the pier (3000); The beam connection unit (2) is located at the bottom of the beam (2000); The energy dissipation unit (3) is a structural component made of steel plate. The pier connection unit (1) is connected to the beam connection unit (2) through the energy dissipation unit (3). It is used to dissipate the input seismic energy through plastic deformation when the beam connection unit (2) is horizontally displaced relative to the pier connection unit (1) due to an earthquake. The first reset unit (4) includes a first reset mechanism (41) and a first pre-tensioned strand (42). The first reset mechanism (41) and the first pre-tensioned strand (42) are elastically connected between the pier connection unit (1) and the beam connection unit (2). When the earthquake ends, the beam connection unit (2) is restored to its initial position relative to the pier connection unit (1) by releasing the stored elastic potential energy, thereby reducing the residual displacement of the structure.

2. The self-resetting energy dissipation device according to claim 1, characterized in that, The pier connection unit (1) includes a pier connection section (11) and a first reset connection section (12). The pier connecting section (11) extends along the first direction (F) and is disposed on the top of the pier (3000); the pier connecting section (11) includes a first end (111) and a second end (112); the first direction (F) is perpendicular to the longitudinal axis of the beam (2000); The first reset connection section (12) is disposed at the first end (111) and protrudes from the side wall of the pier connection section (11); the first pre-stretched strand (42) and the first reset mechanism (41) are elastically connected between the side wall of the first reset connection section (12) and one end of the beam connection unit (2).

3. The self-resetting energy dissipation device according to claim 2, characterized in that, The first reset mechanism (41) includes a first guide sleeve (411), a first elastic component (412), a first stop (413), and a second stop (414). The first guide sleeve (411) is disposed along the first direction (F); The first elastic member (412) is slidably sleeved on the first guide sleeve (411) and sandwiched between the first stop (413) and the second stop (414); The first stop (413) is slidably sleeved on the first guide sleeve (411) and connected to the side wall of the first reset connection section (12); The second stop (414) is slidably sleeved on the first guide sleeve (411) and connected to one end of the beam connecting unit (2); One end of the first pre-stretched strand (42) is connected to the first stop (413), and the other end of the first pre-stretched strand (42) is connected to the second stop (414).

4. The self-resetting energy dissipation device according to claim 3, characterized in that, It also includes a second reset unit (5), which is elastically connected between the other end of the beam connection unit (2) and the second end (112).

5. The self-resetting energy dissipation device according to claim 4, characterized in that, The pier connection unit (1) further includes a second reset connection section (13), which is disposed at the second end (112) and protrudes from the side wall of the pier connection section (11); The second reset unit (5) includes a second reset mechanism and a second pre-stretched strand, which are elastically connected between the other end of the beam connection unit (2) and the side wall of the second reset connection section (13).

6. The self-resetting energy dissipation device according to claim 5, characterized in that, The second reset mechanism includes a second guide sleeve, a second elastic component, a third stop, and a fourth stop; The second guide sleeve is disposed along the first direction (F); The second elastic component is slidably sleeved on the second guide sleeve and sandwiched between the third stop and the fourth stop; The third stop is slidably sleeved on the second guide sleeve and connected to the side wall of the second reset connection section (13); The fourth stop is slidably sleeved on the second guide sleeve and connected to the other end of the beam connection unit (2); One end of the second pre-stretched wire is connected to the third stop, and the other end of the second pre-stretched wire is connected to the fourth stop.

7. The self-resetting energy dissipation device according to claim 6, characterized in that, The first elastic component (412) and the second elastic component are disc springs.

8. The self-resetting energy dissipation device according to any one of claims 2 to 7, characterized in that, The energy-consuming unit (3) includes a connecting steel plate (31), a first energy-consuming steel plate (32), and a second energy-consuming steel plate (33); The connecting steel plate (31) extends along the first direction (F); The first energy-consuming steel plate (32) is sandwiched between the upper end of the connecting steel plate (31) and the beam connecting unit (2); The second energy-consuming steel plate (33) is sandwiched between the lower end of the connecting steel plate (31) and the pier connecting section (11).

9. The self-resetting energy dissipation device according to claim 8, characterized in that, The energy-consuming unit (3) also includes a third energy-consuming steel plate (34) and a fourth energy-consuming steel plate (35). The third energy-consuming steel plate (34) is sandwiched between the upper end of the connecting steel plate (31) and the beam connecting unit (2); The fourth energy-consuming steel plate (35) is sandwiched between the lower end of the connecting steel plate (31) and the pier connecting section (11).

10. The self-resetting energy dissipation device according to claim 9, characterized in that, The first energy-consuming steel plate (32) to the fourth energy-consuming steel plate (35) are configured as a "U"-shaped structure with the opening facing the horizontal direction. The openings of the first energy-consuming steel plate (32) and the third energy-consuming steel plate (34) are arranged facing each other; the openings of the second energy-consuming steel plate (33) and the fourth energy-consuming steel plate (35) are arranged facing each other.

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