High-ductility self-resetting energy dissipation deformation joint device and construction method thereof

Abstract

The invention discloses a high-ductility self-resetting energy consumption deformation joint device and a construction method thereof, a deformation joint is formed between two adjacent bridge deck slabs, and the device is connected with the deformation joint between the two adjacent bridge deck slabs to form an integral continuous bridge deck slab structure; the device comprises a shape memory alloy energy dissipation piece, an embedded bolt sleeve, a limiting bolt and an ECC pouring material. The embedded bolt sleeves are embedded in the ends, close to the deformation joints, of the bridge deck slabs, and the two ends of the shape memory alloy energy dissipation pieces are fixedly connected with the embedded bolt sleeves in the two adjacent bridge deck slabs through limiting bolts. The ECC pouring materials are poured in the deformation joints and cover the shape memory alloy energy consumption pieces, the embedded bolt sleeves and the limiting bolts, so that every two adjacent bridge deck slabs are connected into a whole, the top faces of the ECC pouring materials are flush with the top faces of the bridge deck slabs, and a flat bridge deck slab surface is formed. The invention relates to the technical field of bridge engineering, and can solve the problems of poor durability and fatigue resistance of a bridge deformation joint device in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to a high-ductility self-resetting energy-absorbing deformation joint device and a construction method thereof. Background Art

[0002] Bridge engineering is an important part of my country's transportation network and a hub project for the lifeline of transportation. In order to increase the construction speed and ensure the quality of the project, the technology of on-site hoisting of bridge panels produced by prefabricated beam yards came into being. The gap treatment at the connection of each beam section and the gap treatment at the reserved deformation joints have become the key issues for the smooth flow of bridge decks. Improper treatment will cause quality problems such as cracks and bulges on the bridge deck, which will seriously affect the smooth flow of road traffic.

[0003] The existing bridge expansion joint devices such as butt joint type, steel support type, rubber combined shear type, and modular support type use the elastic deformation or relative sliding of materials to absorb the expansion and contraction deformation of the bridge caused by temperature changes, vehicle loads, etc., and have obvious separation strips on the bridge deck. Although it does not affect the normal passage of vehicles during use, it seriously affects the integrated bridge deck pavement.

[0004] In addition, since the stiffness of the material at the expansion joint is very different from that of the bridge deck, and it is repeatedly subjected to the impact load of the wheels and structural deformation, the expansion joint becomes a part of the bridge structure that is extremely vulnerable to damage and difficult to repair. The important role of the bridge expansion joint device is to protect the main structure from damage. Its design service life should not be lower than the design service life of the pavement structure, and early maintenance and premature replacement should be avoided. However, the severe use conditions and the defects of the expansion joint device have caused the existing expansion joint device to become a vulnerable part and consumables, which may cause the destruction of the concrete structure and partial fracture of the steel section at the least, and the destruction and deformation of the overall structure of the bridge at the worst, and the long-term reliability is poor. Therefore, it is necessary to provide a high-ductility self-resetting energy-consuming expansion joint device and its construction method, which can solve the problems of poor durability and fatigue resistance of the bridge expansion joint device in the prior art. Summary of the invention

[0005] The object of the present invention is to provide a high-ductility self-resetting energy-absorbing deformation joint device and a construction method thereof, which can solve the problems of poor durability and fatigue resistance of bridge deformation joint devices in the prior art.

[0006] The present invention is achieved in that:

[0007] A high-ductility self-resetting energy-absorbing deformation joint device is provided. A deformation joint is formed between two adjacent bridge decks. The high-ductility self-resetting energy-absorbing deformation joint device connects the deformation joints of the two adjacent bridge decks to form an integral continuous bridge deck structure. The high-ductility self-resetting energy-absorbing deformation joint device comprises a shape memory alloy energy-absorbing part, an embedded bolt sleeve, a limit bolt and an ECC casting material. The embedded bolt sleeve is embedded in one end of the bridge deck close to the deformation joint, and the two ends of the shape memory alloy energy-absorbing part are respectively connected and fixed to the embedded bolt sleeves in the two adjacent bridge decks through limit bolts. The ECC casting material is cast in the deformation joint and covers the shape memory alloy energy-absorbing part, the embedded bolt sleeve and the limit bolt, so that the two adjacent bridge decks are connected into a whole. The top surface of the ECC casting material is flush with the top surface of the bridge deck to form a flat bridge deck surface.

[0008] The shape memory alloy energy absorbing part comprises an integrally formed middle energy absorbing strip and two limiting hole rings; the two limiting hole rings are respectively installed on the embedded bolt sleeves in two adjacent bridge panels through limiting bolts, and the middle energy absorbing strip is tied between the two limiting hole rings along the longitudinal direction of the bridge.

[0009] The end of the bridge deck close to the deformation joint is L-shaped to form a deformation joint groove, the embedded bolt sleeve is embedded in the horizontal section of the L-shaped structure, the shape memory alloy energy dissipation part and the limit bolt are located in the deformation joint groove and the deformation joint, and the ECC casting material is cast in the deformation joint groove and the deformation joint.

[0010] The deformation joint groove is formed with a metal bottom plate groove at one end close to the deformation joint, and the two end edges of the metal bottom plate are respectively matched and clamped in the metal bottom plate grooves of the two adjacent bridge panels, so that the metal bottom plate is connected between the two adjacent bridge panels and closes the bottom of the deformation joint.

[0011] The length of the metal bottom plate and the casting length of the ECC casting material are consistent with the transverse length of the bridge; the length direction of the shape memory alloy energy absorbing parts is arranged along the longitudinal direction of the bridge, and a plurality of shape memory alloy energy absorbing parts are spaced apart along the transverse direction of the bridge.

[0012] The shape memory alloy energy-absorbing component is wrapped with an outer bellows.

[0013] The anti-cracking system is formed by the ECC casting material. The pre-deformation distance of the deformation joint between two adjacent bridge decks is Δ, the ultimate elastic strain of the ECC casting material is ε, and the longitudinal bridge spacing of the limit bolts in the deformation joint is L, then L=Δ / ε.

[0014] The ECC casting material is made of materials including polyvinyl alcohol fiber ECC, polyethylene fiber ECC, polypropylene fiber ECC, basalt fiber ECC, steel fiber ECC and mixed fiber ECC.

[0015] A construction method of a high-ductility self-resetting energy-dissipating deformation joint device comprises the following steps:

[0016] Step 1: The bridge deck is prefabricated and a deformation joint groove is formed at one end of the bridge deck near the deformation joint, and a pre-embedded bolt sleeve is embedded in the deformation joint groove, and a metal bottom plate groove is formed at one end of the deformation joint groove near the deformation joint;

[0017] Step 2: The bridge deck is hoisted and positioned on site, and a deformation joint is left between two adjacent bridge decks;

[0018] Step 3: Connect the metal bottom plate between two adjacent bridge decks through the metal bottom plate groove and close the bottom of the deformation joint;

[0019] Step 4: Install the shape memory alloy energy absorbing component along the longitudinal direction of the bridge, and connect and fix the two ends of the shape memory alloy energy absorbing component to the embedded bolt sleeves in the two adjacent bridge panels through limit bolts respectively;

[0020] Step 5: pouring ECC casting materials, connecting two adjacent bridge decks into a whole through the ECC casting materials;

[0021] Step 6: Finish the surface and maintain it to prepare for bridge deck paving.

[0022] In the step 4, the two limiting hole rings are respectively installed on the embedded bolt sleeves in the two adjacent bridge panels through limiting bolts, and the middle energy absorption strip is tied between the two limiting hole rings along the longitudinal direction of the bridge; after the shape memory alloy energy absorption part is installed, the outer corrugated tube is wrapped around the outside of the shape memory alloy energy absorption part;

[0023] In the step 5, the ECC casting material fills the deformation joint above the metal base plate and covers the shape memory alloy energy-absorbing parts, the outer bellows, the embedded bolt sleeves and the limit bolts, and the top surface of the ECC casting material is flush with the top surface of the bridge deck; the ECC casting material is fully vibrated when casting.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention combines SMA shape memory alloy and ECC material to form a self-resetting system and an anti-cracking system, which together form a high-ductility self-resetting energy-dissipating deformation joint device, giving full play to the advantages of SMA material and ECC material, improving the durability, fatigue resistance and long-term reliability of the deformation joint device, and making the service life of the deformation joint higher than the design life of the pavement structure.

[0026] 2. The present invention not only ensures the release of temperature stress and protects the bridge deck from cracking, but also avoids the appearance of visible joints caused by deformation of the bridge deck, thereby ensuring smooth and unimpeded road traffic. It has obvious application advantages, and its design and construction are simple and efficient. It can be widely used in prefabricated assembled bridge projects as a part of the bridge seismic isolation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a partial construction schematic diagram of the high ductility self-resetting energy dissipation deformation joint device of the present invention at the deformation joint;

[0028] Figure 2 It is a longitudinal cross-sectional view of the high-ductility self-resetting energy-dissipating deformation joint device of the present invention;

[0029] Figure 3 It is a cross-sectional view of the high-ductility self-resetting energy-dissipating deformation joint device of the present invention;

[0030] Figure 4 It is a schematic diagram of the construction of the high-ductility self-resetting energy-absorbing deformation joint device of the present invention between two adjacent bridge decks;.

[0031] In the figure, 1SMA shape memory alloy energy absorbing part, 101 outer bellows, 101 limiting hole ring, 103 middle energy absorbing strip, 2 embedded bolt sleeve, 3 limiting bolt, 4ECC casting material, 5 bridge deck, 6 deformation joint groove, 7 metal bottom plate groove, 8 metal bottom plate, 9 bridge pier, 100 high ductility self-resetting energy absorbing deformation joint device. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0033] Please see attached Figure 1 To Attachment Figure 4A high-ductility self-resetting energy-absorbing deformation joint device is provided. A deformation joint is formed between two adjacent bridge decks 5. The high-ductility self-resetting energy-absorbing deformation joint device 100 connects the deformation joints of the two adjacent bridge decks 5 to form an integral continuous bridge deck structure. The high-ductility self-resetting energy-absorbing deformation joint device 100 includes a shape memory alloy (Shape Memory Alloy, referred to as SMA) energy absorbing part 1, an embedded bolt sleeve 2, a limit bolt 3 and an ECC (Engineered cementitious alloy) materials, cement-based composite materials) casting material 4; the embedded bolt sleeve 2 is embedded in one end of the bridge deck 5 close to the deformation joint, and the two ends of the shape memory alloy energy absorbing part 1 are respectively connected and fixed with the embedded bolt sleeves 2 in the two adjacent bridge decks 5 through the limiting bolts 3; the ECC casting material 4 is cast in the deformation joint and covers the shape memory alloy energy absorbing part 1, the embedded bolt sleeve 2 and the limiting bolts 3, so that the two adjacent bridge decks 5 are connected into a whole, and the top surface of the ECC casting material 4 is flush with the top surface of the bridge deck 5 to form a flat bridge deck surface.

[0034] The shape memory alloy energy dissipation part 1, the embedded bolt sleeve 2 and the limit bolt 3 serve as the self-resetting system at the deformation joint of the bridge. The temperature stress of the bridge deck 5 is directly transferred to the shape memory alloy energy dissipation part 1 through the embedded bolt sleeve 2 and the limit bolt 3, and the shape memory alloy energy dissipation part 1 provides the main self-restoring force of the deformation joint. The ECC casting material 4 serves as the anti-cracking system at the deformation joint of the bridge.

[0035] Preferably, the embedded bolt sleeve 2 and the limit bolt 3 can be made of high-strength steel to ensure the structural strength of the deformation joint. The shape memory alloy energy-absorbing part 1 is made of SMA material, which is a new type of intelligent material with unique shape memory effect, superelastic effect and high damping characteristics. It can be used as an energy dissipation and shock absorption device in the bridge seismic isolation system. The ECC casting material 4 is made of ECC material. The ECC designed based on the mesomechanics theory is a cement-based composite material with tensile strain hardening properties and saturated multiple cracking characteristics. The crack control ability is very excellent, especially suitable for structural reinforcement and anti-bending moment cracking fields, which can significantly improve the durability and service life of the structure.

[0036] When the bridge deck 5 shrinks / expands in the longitudinal direction under the action of temperature, the deformation joint expands / contracts in the longitudinal direction due to its smaller rigidity than the bridge deck 5, so that the temperature stress of the bridge deck 5 is released; due to the presence of the shape memory alloy energy-absorbing part 1 and the ECC casting material 4, the longitudinal ductility of the deformation joint is greatly improved, and no obvious gap is generated during the deformation process, but the expansion / contraction occurs almost as one. Therefore, the present invention not only ensures the release of temperature stress and protects the bridge deck 5 from cracking, but also avoids the appearance of bridge deck deformation open joints, ensuring the smooth flow of road traffic, and has obvious application advantages.

[0037] The shape memory alloy energy dissipation member 1 is fixed in the deformation gap between two adjacent bridge decks 5 by means of embedded bolt sleeves 2 and limit bolts 3 to provide self-restoring force.

[0038] Please see attached Figure 2 The shape memory alloy energy absorbing part 1 includes an integrally formed middle energy absorbing strip 103 and two limiting hole rings 102; the two limiting hole rings 102 are respectively installed on the embedded bolt sleeves 2 in the two adjacent bridge panels 5 through limiting bolts 3, and the middle energy absorbing strip 103 is tied between the two limiting hole rings 102 along the longitudinal direction of the bridge.

[0039] The middle energy dissipation strip 103 and the two limiting hole rings 102 are made of SMA material in one piece. The size of the limiting hole ring 102 can be determined according to the specifications of the embedded bolt sleeve 2 and the limiting bolt 3, and the length of the middle energy dissipation strip 103 can be determined according to the distance between the two embedded bolt sleeves 2.

[0040] Please see attached Figure 1 The bridge deck 5 has an L-shaped structure at one end close to the deformation joint, forming a deformation joint groove 6, the embedded bolt sleeve 2 is embedded in the horizontal section of the L-shaped structure, the shape memory alloy energy dissipation part 1 and the limit bolt 3 are located in the deformation joint groove 6 and the deformation joint, and the ECC casting material 4 is cast in the deformation joint groove 6 and the deformation joint.

[0041] The setting of the concave deformation joint groove 6 facilitates the embedding of the embedded bolt sleeve 2 and the installation of the shape memory alloy energy dissipation part 1 and the limit bolt 3. After the ECC casting material 4 is cast, the shape memory alloy energy dissipation part 1 and the limit bolt 3 are both located in the ECC casting material 4 without being exposed, thereby ensuring the flatness and aesthetics of the deformation joint.

[0042] Please see attached Figure 1 The deformation joint groove 6 is formed with a metal bottom plate groove 7 at one end close to the deformation joint, and the two end edges of the metal bottom plate 8 are respectively matched and clamped in the metal bottom plate grooves 7 of the two adjacent bridge panels 5, so that the metal bottom plate 8 is connected between the two adjacent bridge panels 5 and closes the bottom of the deformation joint.

[0043] The metal bottom plate 8 closes the bottom of the deformation joint and serves as a bottom mold for pouring the ECC pouring material 4 to avoid leakage and ensure the pouring quality of the ECC pouring material 4. Both ends of the metal bottom plate 8 are placed in the deformation joint groove 6 through the metal bottom plate groove 7, which is convenient for positioning and installation of the metal bottom plate 8 and has high installation reliability.

[0044] The length of the metal base plate 8 and the casting length of the ECC casting material 4 are consistent with the transverse length of the bridge. The piers of the bridge are constructed at the bottom of the metal base plate 8 to ensure the construction integrity of the deformation joints.

[0045] Please see attached Figure 1 The shape memory alloy energy dissipation component 1 is wrapped with an outer bellows 101 on the outside.

[0046] The outer bellows 101 can provide the shape memory alloy energy dissipation part 1 with a certain radial deformation space, and can make the ECC casting material 4 deform better in coordination. Preferably, the outer bellows 101 can be a metal bellows, and the specifications of the metal bellows can be selected according to the specifications of the shape memory alloy energy dissipation part 1.

[0047] Please see attached Figure 3 The length direction of the shape memory alloy energy absorbing member 1 is arranged along the longitudinal bridge direction, and a plurality of shape memory alloy energy absorbing members 1 are spaced apart along the transverse bridge direction to provide sufficient self-resetting force for the deformation joint.

[0048] The manufacturing materials of the ECC casting material 4 include but are not limited to polyvinyl alcohol (PVA) fiber ECC, polyethylene (PE) fiber ECC, polypropylene (PP) fiber ECC, basalt (BF) fiber ECC, steel fiber ECC and mixed fiber ECC. The corresponding manufacturing materials can be adaptively selected according to actual construction requirements.

[0049] Please see attached Figure 1 To Attachment Figure 4 , the working principle of the present invention is:

[0050] When the temperature drops, the bridge deck 5 shrinks in the longitudinal direction. Since the stiffness of the bridge deck 5 is much greater than that of the deformation joint, the deformation joint is stretched in the longitudinal direction. Since the shape memory alloy energy-absorbing component 1 is directly connected to the embedded bolt sleeve 2 through the limit bolt 3, the shape memory alloy energy-absorbing component 1 is stretched and deformed synchronously during the process of the deformation joint being stretched in the longitudinal direction. At the same time, since the ECC casting material 4 is cast in the deformation joint, the outer bellows 101 of the shape memory alloy energy-absorbing component 1 and the limit bolt 3 act as a skeleton to drive the ECC casting material 4 to undergo coordinated tensile deformation during the deformation process. Since the ECC casting material 4 has tensile strain hardening properties and saturated multiple cracking characteristics, the crack control ability is very excellent. At the same time, the design spacing of the limit bolts 3 determined by the ultimate elastic strain of the ECC casting material 4 ensures that the deformation joint will not crack, but will be tensilely deformed more evenly.

[0051] When the temperature rises, the bridge deck 5 expands in the longitudinal direction. Since the stiffness of the bridge deck 5 is much greater than that of the deformation joint, the deformation joint is squeezed in the longitudinal direction and undergoes compression deformation. Since the ECC casting material 4 has the characteristics of high strength, high toughness and high ductility, no cracks are generated during the compression deformation process. When the temperature returns to normal, the self-resetting system and the bridge deck 5 work together to return to normal levels.

[0052] When local displacement and deformation occur at the deformation joint under the action of vehicle load, the self-resetting system can provide self-restoring force in time to resist deformation, while improving the fatigue resistance and durability of the deformation joint.

[0053] Please see attached Figure 1 , a construction method of a high-ductility self-resetting energy-dissipating deformation joint device, comprising the following steps:

[0054] Step 1: The bridge deck 5 is prefabricated, and at the same time, a deformation joint groove 6 is formed at one end of the bridge deck 5 close to the deformation joint, and a pre-embedded bolt sleeve 2 is embedded in the deformation joint groove 6, and a metal bottom plate groove 7 is formed at one end of the deformation joint groove 6 close to the deformation joint.

[0055] Preferably, an internal thread matching the limit bolt 3 is provided on the inner wall of the embedded bolt sleeve 2, and the number and arrangement spacing of the embedded bolt sleeves 2 are adaptively adjusted according to the actual connection, force and deformation requirements, and the embedded bolt sleeves 2 are fully embedded along the transverse direction of the bridge deck 5.

[0056] According to the construction design drawings, the bridge deck 5 with the deformation joint groove 6 and the metal bottom plate groove 7 is cast in the precast beam yard.

[0057] Step 2: The bridge deck 5 is hoisted and positioned on site, and a deformation joint is left between two adjacent bridge decks 5.

[0058] Step 3: Connect the metal bottom plate 8 between two adjacent bridge decks 5 through the metal bottom plate groove 7 and close the bottom of the deformation joint.

[0059] Step 4: Install the shape memory alloy energy absorbing component 1 along the longitudinal direction of the bridge. Both ends of the shape memory alloy energy absorbing component 1 are connected and fixed to the embedded bolt sleeves 2 in the two adjacent bridge panels 5 through the limit bolts 3 respectively.

[0060] Preferably, the lower part of the limiting bolt 3 is provided with an external thread, and the middle and upper part of the limiting bolt 3 is smooth. During installation, the two limiting hole rings 102 of the shape memory alloy energy dissipation part 1 are aligned with the two embedded bolt sleeves 2 arranged in the longitudinal direction of the two adjacent bridge panels 5. After the limiting bolt 3 passes through the limiting hole ring 102, it is screwed into the embedded bolt sleeve 2 through the threaded section and tightened. The smooth section of the limiting bolt 3 is located in the limiting hole ring 102, so that the middle energy dissipation strip 103 is tied between the two limiting hole rings 102.

[0061] In the step 4, the two limiting hole rings 102 are respectively installed on the embedded bolt sleeves 2 in the two adjacent bridge panels 5 through the limiting bolts 3, and the middle energy absorption strip 103 is tied between the two limiting hole rings 102 along the longitudinal direction of the bridge; after the shape memory alloy energy absorption part 1 is installed, the outer corrugated tube 101 is wrapped around the outside of the shape memory alloy energy absorption part 1, so that the shape memory alloy energy absorption part 1 has a certain radial deformation space, and at the same time, the ECC casting material 4 can better undergo cooperative deformation.

[0062] Step 5: pouring the ECC pouring material 4 , two adjacent bridge decks 5 are connected into a whole through the ECC pouring material 4 .

[0063] In the step 5, the ECC casting material 4 fills the deformation joint above the metal base plate 8 and covers the shape memory alloy energy dissipation part 1, the outer bellows 101, the embedded bolt sleeve 2 and the limit bolt 3, and the top surface of the ECC casting material 4 is flush with the top surface of the bridge deck 5.

[0064] In the step 5, the ECC casting material 4 should be vibrated sufficiently when casting.

[0065] Due to the poor fluidity of the ECC casting material 4 and the presence of the shape memory alloy energy dissipation part 1 and the limit bolt 3, the ECC casting material 4 needs to be fully vibrated during the casting process to ensure the casting quality of the ECC casting material 4. After the ECC casting material 4 is cast, the metal base plate 8, the shape memory alloy energy dissipation part 1 and the limit bolt 3 are all completely located in the deformation joint.

[0066] Step 6: Finish the surface and maintain it to prepare for bridge deck paving.

[0067] The surface finishing and maintenance of the expansion joint is a routine process in bridge construction, and its surface finishing and maintenance process will not be repeated here. After the surface finishing and maintenance is completed, the conventional construction of the bridge such as bridge deck paving can be carried out.

[0068] When the bridge deck 5 shrinks under the action of temperature, since the longitudinal stiffness of the bridge deck 5 is much greater than the stiffness of the deformation joint device, the temperature stress of the bridge deck 5 will be released at the deformation joint. Under the action of the limit bolts 3, the deformation joint is stretched in the longitudinal direction. Since the ECC casting material 4 itself has strong ductility and there is the effect of the shape memory alloy energy-absorbing part 1, the deformation joint is not prone to tensile cracking, but dissipates the temperature stress of the bridge deck 5 by uniform longitudinal tensile deformation.

[0069] When the bridge deck 5 expands under the action of temperature, the deformation joint is squeezed, and the deformation joint is compressed and deformed in the longitudinal direction of the bridge under the action of the limit bolts 3, the deformation joint grooves 6, and the metal bottom plate grooves 7. When the temperature returns to normal, the deformation joint device deforms to both sides under the joint action of the shape memory alloy energy-absorbing parts 1 and the limit bolts 3, and cracks are not easy to occur in the compressed deformation joint.

[0070] The anti-cracking system is composed of ECC casting material 4, the pre-deformation distance of the deformation joint between two adjacent bridge panels 5 is Δ, the ultimate elastic strain of the ECC casting material 4 is ε (which can be determined by the dog bone tensile test), and the longitudinal bridge spacing of the limit bolts 3 in the deformation joint is L, then the conservative calculation L=Δ / ε.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high ductility self-resetting energy dissipation deformation joint device, characterized by: A deformation joint is formed between two adjacent bridge decks (5); the high-ductility self-resetting energy-absorbing deformation joint device (100) connects the deformation joints of the two adjacent bridge decks (5) to form an overall continuous bridge deck structure; the high-ductility self-resetting energy-absorbing deformation joint device (100) comprises a shape memory alloy energy-absorbing part (1), an embedded bolt sleeve (2), a limit bolt (3) and an ECC casting material (4); the embedded bolt sleeve (2) is embedded at one end of the bridge deck (5) close to the deformation joint, and the shape memory alloy energy-absorbing part (1) is formed between the two adjacent bridge decks (5); the high-ductility self-resetting energy-absorbing deformation joint device (100) connects the deformation joints of the two adjacent bridge decks (5) to form an overall continuous bridge deck structure; the high-ductility self-resetting energy-absorbing deformation joint device (100) comprises a shape memory alloy energy-absorbing part (1), an embedded bolt sleeve (2), a limit bolt (3) and an ECC casting material (4); the embedded bolt sleeve (2) is embedded at one end of the bridge deck (5) close to the deformation joint, and the shape memory alloy energy-absorbing part (1) is formed by the shape memory alloy energy-absorbing part (1) and the ECC casting material (4) The two ends of the shape memory alloy energy absorbing part (1) are respectively connected and fixed to the embedded bolt sleeves (2) in two adjacent bridge decks (5) through limiting bolts (3); the ECC casting material (4) is cast in the deformation joint and covers the shape memory alloy energy absorbing part (1), the embedded bolt sleeves (2) and the limiting bolts (3), so that the two adjacent bridge decks (5) are connected into a whole, and the top surface of the ECC casting material (4) is flush with the top surface of the bridge deck (5), forming a flat bridge deck surface.

2. The high ductility self-resetting energy dissipation deformation joint device according to claim 1 is characterized in that: The shape memory alloy energy absorbing component (1) comprises an integrally formed middle energy absorbing strip (103) and two limiting hole rings (102); the two limiting hole rings (102) are respectively installed on the embedded bolt sleeves (2) in two adjacent bridge decks (5) through limiting bolts (3), and the middle energy absorbing strip (103) is pulled between the two limiting hole rings (102) along the longitudinal direction of the bridge.

3. The high ductility self-resetting energy dissipation deformation joint device according to claim 1 or 2 is characterized in that: The bridge deck (5) has an L-shaped structure at one end close to the deformation joint, forming a deformation joint groove (6); the embedded bolt sleeve (2) is embedded in the horizontal section of the L-shaped structure; the shape memory alloy energy absorbing part (1) and the limit bolt (3) are located in the deformation joint groove (6) and the deformation joint; and the ECC casting material (4) is cast in the deformation joint groove (6) and the deformation joint.

4. The high ductility self-resetting energy dissipation deformation joint device according to claim 3 is characterized by: The deformation joint groove (6) is formed with a metal bottom plate groove (7) at one end close to the deformation joint, and the two end edges of the metal bottom plate (8) are respectively matched and clamped in the metal bottom plate grooves (7) of two adjacent bridge panels (5), so that the metal bottom plate (8) is connected between the two adjacent bridge panels (5) and closes the bottom of the deformation joint.

5. The high ductility self-resetting energy dissipation deformation joint device according to claim 4 is characterized in that: The length of the metal base plate (8) and the casting length of the ECC casting material (4) are consistent with the length of the bridge in the transverse direction; the length direction of the shape memory alloy energy absorbing part (1) is arranged along the longitudinal direction of the bridge, and a plurality of shape memory alloy energy absorbing parts (1) are spaced apart and distributed in the transverse direction of the bridge.

6. The high ductility self-resetting energy dissipation deformation joint device according to any one of claims 1 to 5, characterized in that: The shape memory alloy energy dissipation component (1) is wrapped with an outer bellows (101) on the outside.

7. The high ductility self-resetting energy dissipation deformation joint device according to claim 3 is characterized by: The ECC casting material (4) forms an anti-cracking system, the pre-deformation distance of the deformation joint between two adjacent bridge decks (5) is Δ, the ultimate elastic strain of the ECC casting material (4) is ε, and the longitudinal bridge spacing of the limit bolts (3) in the deformation joint is L, then L=Δ / ε.

8. The high ductility self-resetting energy dissipation deformation joint device according to claim 7 is characterized in that: The ECC casting material (4) is made of materials including polyvinyl alcohol fiber ECC, polyethylene fiber ECC, polypropylene fiber ECC, basalt fiber ECC, steel fiber ECC and mixed fiber ECC.

9. A construction method for the high-ductility self-resetting energy-dissipating deformation joint device according to claim 4, characterized in that: The following steps are involved: Step 1: The bridge deck (5) is prefabricated, and at the same time, a deformation joint groove (6) is formed at one end of the bridge deck (5) close to the deformation joint, and a pre-embedded bolt sleeve (2) is pre-embedded in the deformation joint groove (6), and a metal bottom plate groove (7) is formed at one end of the deformation joint groove (6) close to the deformation joint; Step 2: The bridge deck (5) is hoisted and positioned on site, and a deformation joint is left between two adjacent bridge decks (5); Step 3: Connecting the metal bottom plate (8) between two adjacent bridge decks (5) through the metal bottom plate groove (7) and sealing the bottom of the deformation joint; Step 4: installing the shape memory alloy energy absorbing component (1) along the longitudinal direction of the bridge, and connecting and fixing the two ends of the shape memory alloy energy absorbing component (1) to the embedded bolt sleeves (2) in two adjacent bridge decks (5) through limit bolts (3) respectively; Step 5: pouring ECC pouring material (4), two adjacent bridge decks (5) are connected into a whole through the ECC pouring material (4); Step 6: Finish the surface and maintain it to prepare for bridge deck paving.

10. The construction method according to claim 9, characterized in that: In the step 4, the two limiting hole rings (102) are respectively installed on the embedded bolt sleeves (2) in the two adjacent bridge panels (5) through the limiting bolts (3), and the middle energy absorption strip (103) is tied between the two limiting hole rings (102) along the longitudinal direction of the bridge; after the shape memory alloy energy absorption component (1) is installed, the outer corrugated tube (101) is wrapped around the outside of the shape memory alloy energy absorption component (1); In the step 5, the ECC casting material (4) fills the deformation joint above the metal base plate (8), and covers the shape memory alloy energy-absorbing part (1), the outer bellows (101), the embedded bolt sleeve (2) and the limit bolt (3), and the top surface of the ECC casting material (4) is flush with the top surface of the bridge deck (5); and the ECC casting material (4) is fully vibrated when casting.

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