A multi-dimensional self-resetting energy-dissipating connection device applied to segmental precast bridge piers

Abstract

This invention relates to a multi-dimensional self-resetting energy-dissipating connection device for precast segmental bridge piers, comprising: prestressed tendons and steel plates, the steel plates including perforated steel plates and sliding steel plates, the prestressed tendons and high-strength nuts being anchored between the perforated steel plates and the sliding steel plates. The beneficial effects of this invention are: when applied to precast segmental bridge piers, it can dissipate external energy, has a strong energy dissipation capacity, provides good vibration damping, and makes the structure more robust; being externally mounted on the segmental bridge pier, replacement is relatively convenient; it can effectively control structural displacement, improve the service life of the bridge pier, and has a certain load-bearing capacity; the device can play a role in the multi-dimensional resetting of precast segmental bridge piers.

Description

Technical Field

[0001] This invention relates to the field of segmental precast bridges, and more specifically, to a multidimensional self-resetting energy-dissipating connection device for segmental precast bridge piers. Background Technology

[0002] Precast segmental assembly technology has emerged and rapidly developed due to its ability to reduce the environmental impact of bridge construction, minimize disruption to existing traffic, increase construction safety, ensure construction quality, improve construction speed, and reduce costs throughout the bridge's operational lifespan. However, research has revealed that precast segmental piers have insufficient energy dissipation capacity and weak lateral bearing capacity. Therefore, some scholars both domestically and internationally have attempted to improve the energy dissipation capacity and lateral bearing capacity of piers through external energy dissipation devices. However, these devices result in significant residual displacement after earthquakes, making repair difficult and lacking self-resetting capabilities. When ordinary energy dissipation devices are installed on precast segmental piers, the large residual deformation after earthquakes causes significant damage to the piers and negatively impacts the overall performance of the bridge. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-dimensional self-resetting energy-dissipating connection device for segmental prefabricated bridge piers, which can effectively improve the energy dissipation capacity of segmental prefabricated bridge piers and play a multi-dimensional self-resetting role.

[0004] Firstly, a multi-dimensional self-resetting energy-dissipating connection device for segmental precast bridge piers is provided, comprising:

[0005] The prestressing tendon and the steel plate, wherein the steel plate includes a perforated steel plate and a sliding steel plate, and the prestressing tendon and the high-strength nut are anchored between the perforated steel plate and the sliding steel plate;

[0006] The sliding steel plate has multiple sliding circular holes; the perforated steel plate has a sliding hole at its center, and the two vertical sides of the sliding hole are semi-cylindrical; the upper side of the perforated steel plate has two rounded rectangular holes, and the lower side has multiple first circular holes and second circular holes; the diameter of the first circular hole is larger than the diameter of the second circular hole, and the first circular hole and the rounded rectangular hole are on the same straight line; the straight lines connecting the second circular hole and the sliding circular hole are parallel to the two sides of the perforated steel plate; the perforated steel plate has multiple short cylindrical holes in the direction parallel to the sides; the short cylindrical holes are evenly and orderly distributed on the upper and lower sides, and the positions of the short cylindrical holes are such that the inner second circular holes are distributed between each pair of them;

[0007] The sliding steel plate includes a rounded rectangular steel plate and a convex-shaped steel plate welded together. The convex-shaped steel plate is composed of a first convex-shaped sub-steel plate and a second convex-shaped sub-steel plate. The rounded rectangular steel plate is contained in a sliding hole. The rounded rectangular steel plate has multiple elongated cylindrical holes reserved in a direction parallel to the side. The elongated cylindrical holes correspond one-to-one with the short cylindrical holes, and the two sides of the rounded rectangular steel plate are semi-cylinders.

[0008] Preferably, the horizontal length of the second convex-shaped steel plate is the same as the horizontal and lateral lengths of the semi-cylinder excluding the rounded rectangular steel plate, and it is welded together with the rounded rectangular steel plate; the horizontal length of the first convex-shaped steel plate is between the horizontal lengths of the perforated steel plate and the sliding hole, and a disc spring is provided between the first convex-shaped steel plate and the perforated steel plate.

[0009] Preferably, the semi-cylinder is covered with a buffer rubber, and the sum of the diameter of the semi-cylinder and the thickness of the buffer rubber is less than the thickness of the perforated steel plate; the initial length of the disc spring is greater than the minimum horizontal distance between the buffer rubber and the semi-cylinder; the minimum horizontal distance between the buffer rubber and the semi-cylinder is greater than the minimum horizontal distance between the perforated steel plate and the first convex sub-steel plate.

[0010] Preferably, the prestressing tendon includes steel wire, steel strand, heat-treated steel bar, and fiber-reinforced plastic prestressing tendon. The prestressing tendon has threads at both ends, and the minimum lateral distance from the prestressing tendon to the perforated steel plate is greater than half the lateral length of the rounded rectangular hole.

[0011] Preferably, the semi-cylindrical shape of the two vertical sides of the sliding hole is based on the thickness of the perforated steel plate.

[0012] Preferably, the short cylindrical holes on the lower side are horizontally distributed between each pair of short cylindrical holes on the upper side.

[0013] Preferably, the multidimensional self-resetting energy-dissipating connection device is axisymmetric.

[0014] Preferably, the rounded rectangular hole has rounded ends and is connected by a straight line in the middle, and the straight-line distance between the two sides of the rounded rectangular hole is the diameter of the rounded ends.

[0015] Preferably, the horizontal length of the second convex-shaped steel plate is less than the horizontal length of the sliding hole and is four-fifths of the horizontal length of the perforated steel plate. The lateral length of the second convex-shaped steel plate is two-thirds of the lateral length of the sliding hole and is equal to the lateral length of the first convex-shaped steel plate.

[0016] Secondly, a method for installing the multi-dimensional self-resetting energy-dissipating connection device as described in the first aspect is provided, comprising:

[0017] Step 1: Prepare the prefabricated multi-dimensional self-resetting energy dissipation connection device, the segmental piers assembled with the reserved bolts, and a number of matching high-strength nuts and washers.

[0018] Step 2: Pass the circular hole of the sliding steel plate of the multi-dimensional self-resetting energy dissipation connection device through the pre-reserved bolts at the joint of the segmental pier;

[0019] Step 3: Tighten the matching high-strength nuts and washers to the bolts reserved in the segmental pier assembly for anchoring.

[0020] Preferably, in step 1, the prefabrication process of the multidimensional self-resetting energy-dissipating connection device includes:

[0021] Step 1.1: Prefabricate perforated steel plate, including: perforating high-strength steel plate, including: opening a sliding hole in the center, opening two rounded rectangular holes on the upper side, opening multiple first circular holes and second circular holes on the lower side, and opening multiple short cylindrical holes in the direction parallel to the side.

[0022] Step 1.2: Prefabricate the sliding steel plate, including: preparing a rounded rectangular steel plate, a convex-shaped steel plate, and semi-cylinders; making multiple long cylindrical holes in the rounded rectangular steel plate parallel to the side, corresponding one-to-one with the holes of the short cylinders, and installing semi-cylinders on the two sides of the rounded rectangular steel plate; welding the rounded rectangular steel plate and the convex-shaped steel plate together;

[0023] Step 1.3: Install disc springs between the convex-shaped steel plate and the perforated steel plate;

[0024] Step 1.4: Anchor the prestressed tendons and high-strength nuts between the perforated steel plate and the sliding steel plate to obtain a multi-dimensional self-resetting energy-dissipating connection device.

[0025] The beneficial effects of this invention are as follows: When applied to precast segmental bridge piers, this invention can dissipate external energy, exhibiting strong energy dissipation capacity and good vibration reduction effect, making the structure more robust; being externally mounted on the segmental bridge piers, replacement is relatively convenient; it can effectively control structural displacement, improve the service life of the bridge piers, and has a certain load-bearing capacity; the device can play a role in the multi-dimensional repositioning of precast segmental bridge piers. Research shows that the multi-dimensional self-resetting energy dissipation connection device of this invention has a good effect on improving the energy dissipation capacity and self-repositioning of precast segmental bridge piers. Attached Figure Description

[0026] Figure 1 A front view of the multidimensional self-resetting energy-dissipating connection device;

[0027] Figure 2 This is a schematic diagram showing the side view and a partial enlargement (hidden reinforcing bars) of the multi-dimensional self-resetting energy dissipation connection device.

[0028] Figure 3 This is an application scenario diagram of a multi-dimensional self-resetting energy-consuming connection device.

[0029] Figure 4 This is another application scenario diagram for a multi-dimensional self-resetting energy-consuming connection device;

[0030] Figure 5 This is another application scenario diagram for a multi-dimensional self-resetting energy-consuming connection device;

[0031] Figure 6 This is another application scenario diagram for a multi-dimensional self-resetting energy-consuming connection device;

[0032] Explanation of reference numerals in the attached drawings: 1. High-strength nut; 2. Prestressing tendon; 3. Rounded rectangular hole; 4. First circular hole; 5. Second circular hole; 6. Perforated steel plate; 7. Sliding hole; 8. Sliding steel plate; 9. Semi-cylindrical; 10. Circular hole in sliding steel plate; 11. First convex-shaped sub-steel plate; 12. Second convex-shaped sub-steel plate; 13. Disc spring; 14. Buffer rubber; 15. Semi-cylindrical; 16. Rounded rectangular steel plate; 17. Short cylindrical hole; 18. Long cylindrical hole; 19. Main beam; 20. Support; 21. Cap beam; 22. Pier prestressing tendon; 23. Pier segment; 24. Foundation; 25. Multi-dimensional self-resetting energy-dissipating connection device; 26. Segmental assembled pier. Detailed Implementation

[0033] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that those skilled in the art can make several modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0034] Example 1:

[0035] This invention addresses the technical problems existing in the prior art by proposing a multi-dimensional self-resetting energy dissipation connection device for segmental prefabricated bridge piers. This device not only improves the energy dissipation capacity of segmental prefabricated bridge piers, but also enables them to maintain acceptable functionality under seismic loads. After an earthquake, they can be restored to their original function with minimal or no repairs, making the structural system easy to construct and maintain, and achieving high cost-effectiveness throughout their entire life cycle.

[0036] Specifically, a multi-dimensional self-resetting energy-dissipating connection device applied to segmental precast bridge piers, such as... Figure 1 and Figure 2 As shown, it includes:

[0037] The prestressing tendon 2 and the steel plate, the steel plate including the perforated steel plate 6 and the sliding steel plate 8, both the perforated steel plate 6 and the sliding steel plate 8 are high-strength steel plates, and the sliding steel plate 8 is prefabricated. The prestressing tendon 2 and the high-strength nut 1 are anchored between the perforated steel plate 6 and the sliding steel plate 8.

[0038] The sliding steel plate 8 has multiple sliding circular holes 10, for example, fourteen sliding circular holes 10; the perforated steel plate 6 is a high-strength steel plate, and at the center of the perforated steel plate 6 is a sliding hole 7 approximately 0.5 times the size of the outer perimeter of the perforated steel plate 6, with two semi-cylindrical sides 9 in the vertical direction; the upper side of the perforated steel plate 6 has two rounded rectangular holes 3, and the lower side has multiple first circular holes 4 and second circular holes 5, for example, including the two outermost first circular holes 4 and fourteen second circular holes 5; the first circular holes... The diameter of the first circular hole 4 is larger than the diameter of the second circular hole 5, and the first circular hole 4 and the rounded rectangular hole 3 are on the same straight line; the straight lines connecting the second circular hole 5 and the circular hole 10 of the sliding steel plate are parallel to the two sides of the perforated steel plate 6; the perforated steel plate 6 has multiple short cylindrical holes 17 reserved in the direction parallel to the sides, for example, more than fifteen short cylindrical holes 17 are reserved; the short cylindrical holes 17 are evenly and orderly distributed on the upper and lower sides (eight on the upper side and seven on the lower side), and the positions of the short cylindrical holes 17 are such that the second circular holes 5 on the inner side are distributed between each other;

[0039] The sliding steel plate 8 includes a rounded rectangular steel plate 16 and a convex-shaped steel plate welded together. The convex-shaped steel plate is composed of a first convex-shaped sub-steel plate 11 and a second convex-shaped sub-steel plate 12. The rounded rectangular steel plate 16 is contained in the sliding hole 7. The rounded rectangular steel plate 16 has multiple elongated cylindrical holes 18 reserved in the direction parallel to the side. The elongated cylindrical holes 18 correspond one-to-one with the short cylindrical holes 17, and the two sides of the rounded rectangular steel plate 16 are semi-cylinders 15.

[0040] The horizontal length of the second convex-shaped steel plate 12 is the same as the horizontal and lateral lengths of the semi-cylinder 15 excluding the rounded rectangular steel plate 16, and it is welded together with the rounded rectangular steel plate 16; the horizontal length of the first convex-shaped steel plate 11 is between the horizontal lengths of the perforated steel plate 6 and the sliding hole 7, and a disc spring 13 is provided between the first convex-shaped steel plate 11 and the perforated steel plate 6.

[0041] The semi-cylinder 15 is wrapped with a buffer rubber 14. The sum of the diameter of the semi-cylinder 15 and the thickness of the buffer rubber 14 is less than the thickness of the perforated steel plate 6. The initial length of the disc spring 13 is greater than the minimum horizontal distance between the buffer rubber 14 and the semi-cylinder 9. The minimum horizontal distance between the buffer rubber 14 and the semi-cylinder 9 is greater than the minimum horizontal distance between the perforated steel plate 6 and the first convex sub-steel plate 11.

[0042] The prestressing tendon 2 includes steel wire, steel strand, heat-treated steel bar and fiber-reinforced plastic prestressing tendon. The prestressing tendon 2 has threads at both ends. The minimum lateral distance between the prestressing tendon 2 and the perforated steel plate 6 is greater than half the lateral length of the rounded rectangular hole 3.

[0043] The semi-cylindrical shape 9 on the two vertical sides of the sliding hole 7 has a diameter equal to the thickness of the perforated steel plate 6.

[0044] The short cylindrical holes 17 located on the lower side are horizontally distributed between each pair of the short cylindrical holes 17 located on the upper side. The lower side has sixteen circular holes, and the upper side has rounded rectangular holes 3.

[0045] The multidimensional self-resetting energy-consuming connection device 25 is axisymmetric.

[0046] The rounded rectangular hole 3 has rounded ends and is connected by a straight line in the middle. The straight line distance between the two sides of the rounded rectangular hole 3 is the diameter of the rounded ends.

[0047] The horizontal length of the second U-shaped steel plate 12 is less than the horizontal length of the sliding hole 7, and is four-fifths of the horizontal length of the perforated steel plate 6. The lateral length of the second U-shaped steel plate 12 is two-thirds of the lateral length of the sliding hole 7, and is equal to the lateral length of the first U-shaped steel plate 11. In addition, the lateral and horizontal lengths of the sliding steel plate 8 are the same as those of the second U-shaped steel plate 12.

[0048] Example 2:

[0049] A method for installing a multi-dimensional self-resetting energy-dissipating connection device includes:

[0050] Step 1: Prepare the prefabricated multi-dimensional self-resetting energy-consuming connection device 25, the segmental pier 26 with the reserved bolts, and a number of matching high-strength nuts and washers;

[0051] Step 2: Pass the circular hole 10 of the sliding steel plate of the multidimensional self-resetting energy dissipation connection device 25 through the pre-reserved bolts at the joint of the segmental assembly pier 26;

[0052] Step 3: Tighten the matching high-strength nuts and washers to the bolts reserved in section 26 of the bridge pier for anchoring.

[0053] Specifically, the prefabrication process of the self-resetting energy-dissipating connection device (25) includes:

[0054] Step 1.1: Prefabricate perforated steel plate 6, including: perforating high-strength steel plate, including: opening a sliding hole 7 at the center, opening two rounded rectangular holes 3 on the upper side, opening multiple first circular holes 4 and second circular holes 5 on the lower side, and opening multiple short cylindrical holes 17 in a direction parallel to the side.

[0055] Step 1.2: Prefabricate the sliding steel plate 8, including: preparing a rounded rectangular steel plate 16, a convex-shaped steel plate, and a semi-cylinder 15; opening multiple long cylindrical holes 18 in the direction parallel to the side of the rounded rectangular steel plate 16, corresponding one-to-one with the short cylindrical holes 17, and installing the semi-cylinders 15 on the two sides of the rounded rectangular steel plate 16; welding the rounded rectangular steel plate 16 and the convex-shaped steel plate together;

[0056] Step 1.3: Install disc spring 13 between the convex-shaped steel plate and the perforated steel plate 6;

[0057] Step 1.4: Anchor the prestressed tendon 2 and the high-strength nut 1 between the perforated steel plate 6 and the sliding steel plate 8 to obtain the multi-dimensional self-resetting energy-dissipating connection device 25.

[0058] like Figure 3 As shown, applying this invention to the precast segmental bridge pier 26 can dissipate external energy, demonstrating strong energy dissipation capacity and good vibration damping effect, thus making the structure more robust. Being externally mounted on the segmental bridge pier 26, replacement is relatively convenient. It can effectively control structural displacement, improve the service life of the pier, and has a certain load-bearing capacity. The multi-dimensional self-resetting device 25 has a certain effect on the multi-dimensional resetting of the precast segmental bridge pier 25. Its working mechanism is as follows:

[0059] First, the prestressed tendons 2 between the sliding steel plate 8 and the perforated steel plate 6 of the multidimensional self-resetting energy dissipation connection device 25 are tensioned in balance. The sliding steel plate 8 of the device is anchored to the joint on the pier with high-strength bolts. The perforated steel plate 6 is anchored to the sixteen holes 4 and 5 reserved on the lower side of the pier and the sliding hole 3 on the upper side.

[0060] Secondly, under the action of horizontal force, the opening of the joint on the tension side of the segmental pier 26 widens. At this time, the sliding steel plate 8 of the device 25 moves upward, and at the same time, the seven prestressing tendons 2 on the lower side are stretched, causing the device 25 and the pier 26 to return to their original positions. The opening of the joint on the compression side of the pier 26 closes. At this time, the sliding steel plate 8 of the device 25 moves downward, and at the same time, the eight prestressing tendons 2 on the upper side are stretched, causing the device 25 and the pier 26 to return to their original positions. Under the action of horizontal force, there is also horizontal displacement at the joint of the pier 26. The disc spring 13 between the convex steel plates 11 and 12 and the perforated steel plate 6 and the outer buffer rubber 14 of the semi-cylinder 15 on the side of the rounded rectangular steel plate 16 have a certain restraining effect on this displacement.

[0061] Finally, as the horizontal force increases, the longitudinal displacement of the joint of the segmental pier 26 increases. When the displacement is too large, the longitudinal rounded rectangular hole 3 is limited. When the lateral displacement of the joint increases, the larger steel plate 11 of the convex steel plates 11 and 12 fits with the perforated steel plate 6, thereby limiting the displacement.

[0062] like Figure 4As shown, a multi-dimensional self-resetting energy-dissipating connection device is installed on the three-segment precast bridge pier, such as... Figure 5 As shown, a "bent" version of the multi-dimensional self-resetting energy-dissipating connection device is installed on a four-segment prefabricated segmental assembled circular pier, such as... Figure 6 As shown, installing a "miniature" version of the multi-dimensional self-resetting energy-dissipating connection device on the double-segment precast bridge pier can play a certain role in energy dissipation and self-resetting of the segment precast bridge pier, indicating that the application of this device has a certain degree of flexibility, applicability and practicality.

[0063] Whether installing multi-dimensional self-resetting energy-dissipating connection devices on other types of precast segmental piers will have a positive effect on the piers can be determined based on the actual situation. In other words, multi-dimensional self-resetting energy-dissipating connection devices can be placed at the joints of various segmental piers. As long as the characteristics of multi-dimensional self-resetting energy-dissipating connection devices are met, they can improve the durability of bridges and extend their service life.

[0064] There are many ways to verify the superiority of a multi-dimensional self-resetting energy-dissipating connection device. In this embodiment, a classic case will be used to illustrate the advantages.

[0065] The piers of a famous bridge are precast segmental piers. Initially, the energy dissipation device at the joints consisted of only a single ring-shaped steel plate. Although this ring-shaped energy dissipation device could dissipate energy, over time, due to its inability to reset, the displacement at the joints increased, resulting in insufficient protection for the piers and a reduced service life. It was estimated that the service life of the piers using this ring-shaped energy dissipation device would be 10 years. Now, some professionals have replaced the non-resetting ring-shaped energy dissipation device with other resetting energy dissipation devices, such as multi-dimensional self-resetting energy dissipation connection devices. The results were significant, with a sharp decrease in the rate of damage to the pier joints. Ultimately, the actual service life of this pier reached 15 years. This demonstrates that multi-dimensional self-resetting energy dissipation connection devices provide greater protection for piers than ordinary energy dissipation devices.

Claims

1. A multi-dimensional self-resetting energy-dissipating connection device applied to segmental precast bridge piers, characterized in that, include: The prestressing tendon (2) and the steel plate, the steel plate including the perforated steel plate (6) and the sliding steel plate (8), the prestressing tendon (2) and the high-strength nut (1) are anchored between the perforated steel plate (6) and the sliding steel plate (8); The sliding steel plate (8) has multiple sliding circular holes (10); the perforated steel plate (6) has a sliding hole (7) at its center, and the two vertical sides of the sliding hole (7) are semi-cylindrical (9); the perforated steel plate (6) has two rounded rectangular holes (3) reserved on its upper side and multiple first circular holes (4) and second circular holes (5) reserved on its lower side; the diameter of the first circular hole (4) is larger than the diameter of the second circular hole (5), and the... The first circular hole (4) and the rounded rectangular hole (3) are on a straight line; the straight lines connecting the second circular hole (5) and the circular hole (10) of the sliding steel plate are parallel to the two sides of the perforated steel plate (6); the perforated steel plate (6) has multiple short cylindrical holes (17) reserved in the direction parallel to the sides; the short cylindrical holes (17) are evenly and orderly distributed on the upper and lower sides, and the positions of the short cylindrical holes (17) are such that the second circular holes (5) on the inner side are distributed between each other; The sliding steel plate (8) includes a rounded rectangular steel plate (16) and a convex-shaped steel plate welded together. The convex-shaped steel plate is composed of a first convex-shaped sub-steel plate (11) and a second convex-shaped sub-steel plate (12). The rounded rectangular steel plate (16) is contained in a sliding hole (7). The rounded rectangular steel plate (16) has multiple elongated cylindrical holes (18) reserved in a direction parallel to the side. The elongated cylindrical holes (18) correspond one-to-one with the short cylindrical holes (17). The two sides of the rounded rectangular steel plate (16) are semi-cylinders (15). The multi-dimensional self-resetting energy-consuming connection device (25) is axially symmetrical. The horizontal length of the second convex-shaped sub-steel plate (12) is the same as the horizontal and lateral length of the semi-cylinder (15) excluding the rounded rectangular steel plate (16), and is welded together with the rounded rectangular steel plate (16); the horizontal length of the first convex-shaped sub-steel plate (11) is between the horizontal length of the perforated steel plate (6) and the sliding hole (7), and a disc spring (13) is provided between the first convex-shaped sub-steel plate (11) and the perforated steel plate (6); The semi-cylinder (15) is wrapped with a buffer rubber (14), and the sum of the diameter of the semi-cylinder (15) and the thickness of the buffer rubber (14) is less than the thickness of the perforated steel plate (6); the initial length of the disc spring (13) is greater than the minimum horizontal distance between the buffer rubber (14) and the semi-cylinder (9); the minimum horizontal distance between the buffer rubber (14) and the semi-cylinder (9) is greater than the minimum horizontal distance between the perforated steel plate (6) and the first convex sub-steel plate (11); The prestressing tendon (2) includes steel wire, steel strand, heat-treated steel bar and fiber-reinforced plastic prestressing tendon. The prestressing tendon (2) has threads at both ends. The minimum lateral distance between the prestressing tendon (2) and the perforated steel plate (6) is greater than half the lateral length of the rounded rectangular hole (3). The semi-cylindrical (9) sides of the vertical direction of the sliding hole (7) are shaped with the thickness of the perforated steel plate (6) as the diameter.

2. The multi-dimensional self-resetting energy-dissipating connection device applied to segmental precast bridge piers according to claim 1, characterized in that, The short cylindrical holes (17) located on the lower side are horizontally distributed between each pair of the short cylindrical holes (17) located on the upper side.

3. The multi-dimensional self-resetting energy-dissipating connection device applied to segmental precast bridge piers according to claim 1, characterized in that, The rounded rectangular hole (3) has rounded arcs at both ends and is connected by a straight line in the middle. The straight line distance between the two sides of the rounded rectangular hole (3) is the diameter of the rounded arcs at both ends.

4. The multi-dimensional self-resetting energy-dissipating connection device applied to segmental precast bridge piers according to claim 1, characterized in that, The horizontal length of the second convex-shaped steel plate (12) is less than the horizontal length of the sliding hole (7) and is four-fifths of the horizontal length of the perforated steel plate (6). The lateral length of the second convex-shaped steel plate (12) is two-thirds of the lateral length of the sliding hole (7) and is equal to the lateral length of the first convex-shaped steel plate (11).

5. An installation method for the multi-dimensional self-resetting energy-dissipating connection device as described in claim 1, characterized in that, include: Step 1: Prepare the prefabricated multi-dimensional self-resetting energy-consuming connection device (25), the segmental assembly pier with reserved bolts (26), and a number of matching high-strength nuts and washers; Step 2: Pass the sliding steel plate circular hole (10) of the multidimensional self-resetting energy dissipation connection device (25) through the pre-reserved bolts at the joint of the segmental assembly pier (26); Step 3: Tighten the matching high-strength nuts and washers to the bolts reserved on the segmental pier (26) for anchoring.

6. The installation method of the multi-dimensional self-resetting energy-dissipating connection device according to claim 5, characterized in that, In step 1, the prefabrication process of the multidimensional self-resetting energy-dissipating connection device (25) includes: Step 1.1: Prefabricate perforated steel plate (6), including: perforating high-strength steel plate, including: a sliding hole (7) is opened at the center, two rounded rectangular holes (3) are opened on the upper side, multiple first circular holes (4) and second circular holes (5) are opened on the lower side, and multiple short cylindrical holes (17) are opened in the direction parallel to the side. Step 1.2: Prefabricate the sliding steel plate (8), including: preparing a rounded rectangular steel plate (16), a convex steel plate and a semi-cylinder (15); opening multiple long cylindrical holes (18) in the direction parallel to the side of the rounded rectangular steel plate (16) and corresponding to the short cylindrical holes (17), and installing semi-cylinders (15) on the two sides of the rounded rectangular steel plate (16); welding the rounded rectangular steel plate (16) and the convex steel plate together; Step 1.3: Install disc springs (13) between the convex steel plate and the perforated steel plate (6); Step 1.4: Anchor the prestressed tendon (2) and the high-strength nut (1) between the perforated steel plate (6) and the sliding steel plate (8) to obtain the multidimensional self-resetting energy-consuming connection device (25).

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