A prefabricated ductile energy dissipation joint for reinforced concrete frames and its construction method

Abstract

A prefabricated ductile energy dissipation joint for reinforced concrete frames and its construction method include the following steps: Step 1: fabricating an upper prefabricated column, a lower prefabricated column, and a prefabricated beam; Step 2: installing the lower prefabricated column in place; Step 3: hoisting the upper prefabricated column and aligning the upper connecting cylinder with the lower connecting cylinder; Step 4: connecting the upper and lower connecting cylinders at the joint using butt-welded bevel welding; Step 5: welding the adapter to the upper and lower connecting cylinders as a whole; Step 6: hoisting the replaceable energy dissipation connector and connecting the replaceable energy dissipation connector to the adapter using a first high-strength bolt; Step 7: hoisting the prefabricated beam and connecting the joint connector to the replaceable energy dissipation connector using a second high-strength bolt, thus completing the construction. This invention solves the technical problems of traditional reinforced concrete frame joints being prone to plastic damage and residual deformation, failing to consider post-earthquake structural damage repair, and failing to maximize the advantages of prefabricated structures.

Description

Technical Field

[0001] This invention belongs to the field of building engineering technology, and specifically relates to a prefabricated ductile energy dissipation joint for reinforced concrete frames and its construction method. Background Technology

[0002] Damage control and post-earthquake repair of beam-column joints are both hot topics and challenges in the field of seismic engineering. Traditional seismic design approaches enhance structural strength and stiffness through effective seismic measures or prevent brittle failure or collapse through the ductility of structures or components. However, the energy dissipation of this structural system primarily relies on the main structure, making it prone to plastic damage and residual deformation, which is difficult to repair. Cast-in-place connections in precast structures are currently the most widely used connection method. While wet connections (i.e., pouring concrete on-site within the connection zone) using different construction methods can provide sufficient strength, deformation, and energy dissipation capacity, simulating the seismic performance of cast-in-place concrete structures, they still inherit the inherent disadvantages of traditional cast-in-place concrete structures and do not consider post-earthquake structural damage repair, making it difficult to maximize the advantages of precast structures. Therefore, it is necessary to provide a replaceable beam-column joint that is simple and reliable in connection, has a simple load transfer path, is easy to construct, is easy to repair after an earthquake, and has damage control capabilities. Summary of the Invention

[0003] The purpose of this invention is to provide a prefabricated ductile energy dissipation joint for reinforced concrete frames and its construction method, in order to solve the technical problems of traditional reinforced concrete frame joints being prone to plastic damage and residual deformation, failing to consider the problem of structural damage repair after earthquakes, and being unable to maximize the advantages of prefabricated structures.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A prefabricated ductile energy dissipation joint for reinforced concrete frames includes an upper precast column, a lower precast column, and a precast beam; it also includes an upper connecting cylinder, a lower connecting cylinder, a transition piece, and replaceable energy dissipation connectors; a lower horizontal stiffening anchor plate is provided in the lower part of the inner cavity of the lower connecting cylinder; the lower connecting cylinder is sleeved on the upper end of the lower precast column, and the lower horizontal stiffening anchor plate presses on the top surface of the lower precast column; an upper horizontal stiffening anchor plate is provided in the upper part of the inner cavity of the upper connecting cylinder; the upper connecting cylinder is sleeved on the lower end of the upper precast column, and the upper horizontal stiffening anchor plate presses on the bottom surface of the upper precast column; the upper connecting cylinder and the lower connecting cylinder are butt-welded; the transition piece is provided on one side of the upper and lower connecting cylinders, and the transition piece is welded to both the upper and lower connecting cylinders; An arc-shaped notch is provided in the middle of the side of the adapter near the upper and lower connecting cylinders; a first end plate is provided on the side of the adapter near the precast beam; the longitudinal section of the replaceable energy dissipation connector is I-shaped, and a second end plate is provided at each end of the replaceable energy dissipation connector; the second end plate on one side of the replaceable energy dissipation connector contacts the surface of the first end plate and is connected by a first high-strength bolt; the precast beam is located on the other side of the replaceable energy dissipation connector, and a node connector is pre-embedded in the precast beam near the end position; the end of the node connector extends beyond the end face of the precast beam; a third end plate is connected to the end of the node connector; the second end plate on the side near the precast beam contacts the surface of the third end plate and is connected by a second high-strength bolt.

[0006] Preferably, the upper end of the main reinforcement bar of the lower precast column extends beyond the top surface of the lower precast column; a thread is provided at the part of the main reinforcement bar that extends beyond the lower precast column; a first through-bar hole is provided on the lower horizontal stiffening anchor plate at the corresponding through-bar position of the main reinforcement bar of the lower column; the upper end of the main reinforcement bar of the lower column passes through the first through-bar hole and is fixed by a first nut.

[0007] Preferably, the lower end of the main reinforcement bar in the upper precast column extends beyond the bottom surface of the upper precast column; a thread is provided at the part of the main reinforcement bar that extends beyond the upper precast column; a second through hole is provided on the upper horizontal stiffening anchor plate at the corresponding through position of the main reinforcement bar; the lower end of the main reinforcement bar passes through the second through hole and is fixed by a second nut.

[0008] Preferably, the longitudinal section of the adapter is I-shaped; the longitudinal section of the node connector is I-shaped, and the cross-sectional dimensions of the node connector are adapted to the cross-sectional dimensions of the adapter; the cross-sectional dimensions of the node connector are adapted to the cross-sectional dimensions of the replaceable energy dissipation connector.

[0009] Preferably, the upper horizontal stiffening anchor plate has a first hole in the middle of its surface; the upper precast column has main reinforcement bars spaced apart near the column's central axis; the lower ends of the main reinforcement bars near the column's central axis pass through the first hole.

[0010] Preferably, the lower horizontal stiffening anchor plate has a second hole in the middle of its surface; the lower precast column has main reinforcement bars spaced apart near the column's central axis; the lower ends of the main reinforcement bars near the column's central axis pass through the second hole.

[0011] Preferably, the cavity between the upper and lower connecting cylinders and between the upper and lower horizontal stiffening anchor plates is filled with concrete; the upper precast column has a grouting channel that communicates with the cavity.

[0012] Preferably, the diameter of the arc-shaped notch is not less than 1 / 3 of the height of the adapter.

[0013] A construction method for prefabricated ductile energy dissipation joints for reinforced concrete frames includes the following steps.

[0014] Step 1: Fabrication of upper precast columns, lower precast columns, and precast beams: When fabricating the upper precast columns, pass the main reinforcement bars of the upper column through the upper horizontal stiffening anchor plate, and use the second nut to fix the upper horizontal stiffening anchor plate to the upper precast column; when fabricating the lower precast columns, pass the main reinforcement bars of the lower column through the lower horizontal stiffening anchor plate, and use the first nut to fix the lower horizontal stiffening anchor plate to the lower precast column; when fabricating the precast beams, embed node connectors within the precast beams.

[0015] Step 2: Install the lower precast column in place.

[0016] Step 3: Hoist the precast column and align the upper connecting cylinder with the lower connecting cylinder.

[0017] Step 4: After verifying that the position of the precast column is correct, use butt welds to connect the upper and lower connecting cylinders at the joint.

[0018] Step 5: Weld the adapter to the upper and lower connecting cylinders as a whole.

[0019] Step Six: Hoist the replaceable energy dissipation connector, align the left end plate of the replaceable energy dissipation connector with the adapter, and connect the replaceable energy dissipation connector and the adapter with the first high-strength bolt.

[0020] Step 7: Hoist the precast beam, align the right end plate of the node connector with the replaceable energy dissipation connector, and connect the node connector with the replaceable energy dissipation connector using the second high-strength bolt. The construction is now complete.

[0021] Preferably, when the upper precast column has a grouting channel that communicates with the cavity, the grouting pipe is inserted into the cavity from the grouting channel, and grout is injected into the cavity and the grouting channel.

[0022] Compared with the prior art, the present invention has the following features and beneficial effects.

[0023] 1. In the prefabricated replaceable ductile energy dissipation node of the present invention, the beams and columns are connected by adapters and replaceable energy dissipation connectors. Before installation, the adapters and replaceable energy dissipation connectors are bolted together to form a whole connecting component. An arc-shaped notch is provided in the middle of the side of the adapter near the upper and lower connecting cylinders, so that the whole connecting component becomes a weakening part and energy dissipation part. At the same time, the replaceable energy dissipation connectors are detachably connected to the beams, so that the whole connecting component acts as the main damage element to dissipate seismic energy, plays the role of "damage fuse", and can also reduce the damage to the main structure, so that it can be replaced after damage.

[0024] 2. The prefabricated replaceable ductile energy dissipation joint of the present invention is proposed to improve the seismic performance of prefabricated reinforced concrete frame beam-column joints and facilitate rapid post-earthquake repair. In addition, the construction method of the prefabricated replaceable ductile energy dissipation joint of the present invention mainly concentrates damage and destruction on replaceable transition parts and replaceable energy dissipation connectors to protect the main structural components beams and columns, thereby improving the seismic performance of the main structure and facilitating rapid post-earthquake repair. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the prefabricated ductile energy dissipation node for reinforced concrete frames according to the present invention.

[0027] Figure 2 This is a front structural schematic diagram of the prefabricated ductile energy dissipation node for reinforced concrete frames according to the present invention.

[0028] Figure 3 This is a schematic diagram of the connection structure between the upper connecting cylinder and the lower connecting cylinder in this invention.

[0029] Figure 4 This is a schematic diagram of the connection structure of the replaceable energy dissipation connector, adapter, and node connector in this invention.

[0030] Figure 5 This is a schematic diagram of the adapter in this invention.

[0031] Figure 6 This is a schematic diagram of the replaceable energy dissipation connector in this invention.

[0032] Attached reference numerals: 1 - Upper precast column, 1.1 - Upper column main reinforcement, 1.2 - Upper column stirrups, 2 - Lower precast column, 2.1 - Lower column main reinforcement, 2.2 - Lower column stirrups, 3 - Precast beam, 4 - Upper connecting cylinder, 4.1 - Upper horizontal stiffening anchor plate, 5 - Lower connecting cylinder, 5.1 - Lower horizontal stiffening anchor plate, 6 - Arc-shaped notch, 7 - Transition piece, 8 - Replaceable energy dissipation connector, 9 - Grouting duct, 10 - Bolt, 11 - First end plate, 12 - Second end plate, 13 - Third end plate, 14 - First high-strength bolt, 15 - Node connector, 16 - Second high-strength bolt, 17 - First through-reinforcement hole, 18 - First nut, 19 - Second through-reinforcement hole, 20 - First hole, 21 - Second hole, 22 - Second nut. Detailed Implementation

[0033] like Figure 1-6 As shown, this prefabricated ductile energy dissipation joint for reinforced concrete frames includes an upper precast column 1, a lower precast column 2, and a precast beam 3; it also includes an upper connecting cylinder 4, a lower connecting cylinder 5, a transition piece 7, and a replaceable energy dissipation connector 8; a lower horizontal stiffening anchor plate 5.1 is provided in the lower part of the inner cavity of the lower connecting cylinder 5; the lower connecting cylinder 5 is sleeved on the upper end of the lower precast column 2, and the lower horizontal stiffening anchor plate 5.1 presses on the top surface of the lower precast column 2; an upper horizontal stiffening anchor plate 4.1 is provided in the upper part of the inner cavity of the upper connecting cylinder 4; the upper connecting cylinder 4 is sleeved on the lower end of the upper precast column 1, and the upper horizontal stiffening anchor plate 4.1 presses on the bottom surface of the upper precast column 1; the upper connecting cylinder 4 and the lower connecting cylinder 5 are butt-welded; the transition piece 7 is provided on one side of the upper connecting cylinder 4 and the lower connecting cylinder 5, and the transition piece 7 is welded to both the upper connecting cylinder 4 and the lower connecting cylinder 5; The adapter 7 has an arc-shaped notch 6 in the middle of the side near the upper connecting cylinder 4 and the lower connecting cylinder 5; a first end plate 11 is provided on the side of the adapter 7 near the precast beam 3; the longitudinal section of the replaceable energy dissipation connector 8 is I-shaped, and a second end plate 12 is provided at both ends of the replaceable energy dissipation connector 8; the second end plate 12 on one side of the replaceable energy dissipation connector 8 is in contact with the surface of the first end plate 11 and is connected by a first high-strength bolt 14; the precast beam 3 is located on the other side of the replaceable energy dissipation connector 8, and a node connector 15 is pre-embedded in the precast beam 3 near the end position; the end of the node connector 15 extends beyond the end face of the precast beam 3; a third end plate 13 is connected to the end of the node connector 15; the second end plate 12 on the side near the precast beam 3 is in contact with the surface of the third end plate 13 and is connected by a second high-strength bolt 16.

[0034] In this embodiment, the lower precast column 2 has a rectangular cross-section, and the lower column main reinforcement 2.1 in the lower precast column 2 is arranged at the four corner positions near the lower precast column 2; the upper end of the lower column main reinforcement 2.1 extends beyond the top surface of the lower precast column 2; a thread is provided at the part of the lower column main reinforcement 2.1 that extends beyond the lower precast column 2; lower column stirrups 2.2 are provided at intervals from top to bottom on the outside of a group of lower column main reinforcements 2.1; a first through-reinforcement hole 17 is provided on the lower horizontal stiffening anchor plate 5.1 at the position where the lower column main reinforcement 2.1 passes through; the upper end of the lower column main reinforcement 2.1 passes through the first through-reinforcement hole 17 and is fixed by a first nut 18.

[0035] Of course, in other embodiments, the cross-section of the lower precast column 2 can also be circular, and the lower column main reinforcement 2.1 is arranged circumferentially in the lower precast column 2. In this embodiment, the cross-section of the upper precast column 1 is rectangular, and the upper column main reinforcement 1.1 in the upper precast column 1 is arranged at the four corner positions close to the upper precast column 1; the lower end of the upper column main reinforcement 1.1 extends beyond the bottom surface of the upper precast column 1; a thread is provided on the part of the upper column main reinforcement 1.1 that extends beyond the upper precast column 1; upper column stirrups 1.2 are arranged at intervals from top to bottom on the outside of a group of upper column main reinforcements 1.1; a second through-bar hole 19 is provided on the upper horizontal stiffening anchor plate 4.1 at the position corresponding to the through-bar position of the upper column main reinforcement 1.1; the lower end of the upper column main reinforcement 1.1 passes through the second through-bar hole 19 and is fixed by a second nut 22.

[0036] Of course, in other embodiments, the cross-section of the upper precast column 1 can also be circular, and the main reinforcement bars 1.1 of the upper column are arranged in the upper precast column 1 at intervals along the circumferential direction.

[0037] In this embodiment, the longitudinal section of the adapter 7 is I-shaped; the longitudinal section of the node connector 15 is I-shaped, and the cross-sectional dimensions of the node connector 15 are adapted to the cross-sectional dimensions of the adapter 7; the cross-sectional dimensions of the node connector 15 are adapted to the cross-sectional dimensions of the replaceable energy dissipation connector 8.

[0038] In this embodiment, a first hole 20 is provided in the middle of the upper horizontal stiffening anchor plate 4.1; the upper column main reinforcement 1.1 is provided at intervals in the upper precast column 1 near the column central axis; the lower end of the upper column main reinforcement 1.1 near the column central axis passes through the first hole 20.

[0039] In this embodiment, a second hole 21 is provided in the middle of the surface of the lower horizontal stiffening anchor plate 5.1; the lower column main reinforcement 2.1 is provided at intervals in the lower precast column 2 near the column central axis; the lower end of the lower column main reinforcement 2.1 near the column central axis passes through the second hole 21.

[0040] In this embodiment, concrete is filled in the cavity between the upper horizontal stiffening anchor plate 4.1 and the lower horizontal stiffening anchor plate 5.1 inside the upper connecting cylinder 4 and the lower connecting cylinder 5; a grouting channel 9 connected to the cavity is reserved in the upper precast column 1.

[0041] In this embodiment, the diameter of the arc-shaped notch 6 is not less than 1 / 3 of the height of the adapter 7.

[0042] In this embodiment, the top of the first end plate 11 extends beyond the top surface of the adapter 7, and the bottom of the first end plate 11 extends beyond the bottom surface of the adapter 7.

[0043] In this embodiment, the top of the second end plate 12 extends beyond the top surface of the replaceable energy dissipation connector 8, and the bottom of the second end plate 12 extends beyond the bottom surface of the replaceable energy dissipation connector 8; the size of the first end plate 11 is adapted to the size of the second end plate 12.

[0044] In this embodiment, the top of the third end plate 13 extends beyond the top surface of the node connector 15, and the bottom of the third end plate 13 extends beyond the bottom surface of the node connector 15; the size of the third end plate 13 is adapted to the size of the second end plate 12.

[0045] The construction method for this prefabricated ductile energy dissipation joint for reinforced concrete frames includes the following steps.

[0046] Step 1: Fabrication of upper precast column 1, lower precast column 2, and precast beam 3: When fabricating upper precast column 1, pass the upper column main reinforcement 1.1 through the upper horizontal stiffening anchor plate 4.1, and fix the upper horizontal stiffening anchor plate 4.1 to the upper precast column 1 with the second nut 22; when fabricating lower precast column 2, pass the lower column main reinforcement 2.1 through the lower horizontal stiffening anchor plate 5.1, and fix the lower horizontal stiffening anchor plate 5.1 to the lower precast column 2 with the first nut 18; when fabricating precast beam 3, embed node connectors 15 in the precast beam 3.

[0047] Step 2: Install the lower precast column 2 into place.

[0048] Step 3: Hoist the precast column 1 and align the upper connecting cylinder 4 with the lower connecting cylinder 5.

[0049] Step 4: After verifying that the position of the upper precast column 1 is correct, butt welds are used to connect the upper connecting cylinder 4 and the lower connecting cylinder 5 at the joint.

[0050] Step 5: Weld the adapter 7 to the upper connecting cylinder 4 and the lower connecting cylinder 5 into a whole.

[0051] Step 6: Hoist the replaceable energy dissipation connector 8, align the left end plate of the replaceable energy dissipation connector 8 with the adapter 7, and connect the replaceable energy dissipation connector 8 and the adapter 7 using the first high-strength bolt 14.

[0052] Step 7: Hoist the precast beam 3, align the node connector 15 with the right end plate of the replaceable energy dissipation connector 8, and connect the node connector 15 and the replaceable energy dissipation connector 8 with the second high-strength bolt 16. The construction is now complete.

[0053] In this embodiment, when the upper precast column 1 has a grouting channel 9 that is connected to the cavity, the grouting pipe is inserted into the cavity from the grouting channel 9 and grout is injected into the cavity and the grouting channel 9.

[0054] The above embodiments are not exhaustive examples of specific implementation methods, and other embodiments are also possible. The purpose of the above embodiments is to illustrate the present invention, rather than to limit the scope of protection of the present invention. All applications derived from simple variations of the present invention fall within the scope of protection of the present invention.

Claims

1. A prefabricated ductile energy dissipation joint for reinforced concrete frames, comprising an upper precast column (1), a lower precast column (2), and a precast beam (3); characterized in that: It also includes an upper connecting cylinder (4), a lower connecting cylinder (5), a transition piece (7), and a replaceable energy dissipation connector (8); the lower connecting cylinder (5) has a lower horizontal stiffening anchor plate (5.1) installed in the lower part of its inner cavity; the lower connecting cylinder (5) is sleeved on the upper end of the lower precast column (2), and the lower horizontal stiffening anchor plate (5.1) presses against the top surface of the lower precast column (2); the upper connecting cylinder (4) has an upper horizontal stiffening anchor plate (4.1) installed in the upper part of its inner cavity; the upper connecting cylinder (4) has a lower horizontal stiffening anchor plate (4.1) installed in the upper part of its inner cavity; the upper connecting cylinder (5) has a lower horizontal stiffening anchor plate (5.1) installed in the upper part of its inner cavity; the lower connecting cylinder (5) is sleeved on the upper end of the lower precast column (2), and the lower horizontal stiffening anchor plate (5.1) presses against the top surface of the lower precast column (2); the upper connecting cylinder (5) has a lower horizontal stiffening anchor plate (4.1) installed in the upper part of its inner cavity; the upper connecting cylinder (5) has a lower horizontal stiffening anchor plate (5.1) installed in the upper part of its inner cavity; the lower connecting cylinder (5) is sleeved on the upper end of the lower precast column (2), and the lower horizontal stiffening anchor plate (5.1) presses against the top surface of the lower precast column (2); ... The cylinder (4) is fitted onto the lower end of the upper precast column (1), and the upper horizontal stiffening anchor plate (4.1) presses against the bottom surface of the upper precast column (1); the upper connecting cylinder (4) and the lower connecting cylinder (5) are butt-welded; the adapter (7) is set on one side of the upper connecting cylinder (4) and the lower connecting cylinder (5), and the adapter (7) is welded to both the upper connecting cylinder (4) and the lower connecting cylinder (5); the adapter (7) is located near the upper connecting cylinder (4) and the lower connecting cylinder (5). An arc-shaped notch (6) is provided in the middle of one side; a first end plate (11) is provided on the side of the adapter (7) near the precast beam (3); the longitudinal section of the replaceable energy dissipation connector (8) is I-shaped, and a second end plate (12) is provided at both ends of the replaceable energy dissipation connector (8); the second end plate (12) on one side of the replaceable energy dissipation connector (8) is in contact with the surface of the first end plate (11) and is connected by a first high-strength bolt (14); the precast beam (3) is provided on the other side of the replaceable energy dissipation connector (8), and a node connector (15) is pre-embedded in the precast beam (3) near the end position; the end of the node connector (15) extends beyond the end face of the precast beam (3); a third end plate (13) is connected to the end of the node connector (15); the second end plate (12) on the side near the precast beam (3) is in contact with the surface of the third end plate (13) and is connected by a second high-strength bolt (16).

2. The prefabricated ductile energy dissipation joint for reinforced concrete frames according to claim 1, characterized in that: The upper end of the main reinforcement bar (2.1) of the lower precast column (2) extends beyond the top surface of the lower precast column (2); a thread is provided at the part where the main reinforcement bar (2.1) extends beyond the lower precast column (2); a first through-bar hole (17) is provided on the lower horizontal stiffening anchor plate (5.1) at the position where the main reinforcement bar (2.1) passes through; the upper end of the main reinforcement bar (2.1) of the lower column passes through the first through-bar hole (17) and is fixed by a first nut (18).

3. The prefabricated ductile energy dissipation joint for reinforced concrete frames according to claim 1, characterized in that: The lower end of the upper column main reinforcement (1.1) in the upper precast column (1) extends beyond the bottom surface of the upper precast column (1); a thread is provided at the part where the upper column main reinforcement (1.1) extends beyond the upper precast column (1); a second through-reinforcement hole (19) is provided on the upper horizontal stiffening anchor plate (4.1) at the position where the upper column main reinforcement (1.1) passes through; the lower end of the upper column main reinforcement (1.1) passes through the second through-reinforcement hole (19) and is fixed by a second nut (22).

4. The prefabricated ductile energy dissipation joint for reinforced concrete frames according to claim 1, characterized in that: The longitudinal section of the adapter (7) is I-shaped; the longitudinal section of the node connector (15) is I-shaped, and the cross-sectional dimensions of the node connector (15) are adapted to the cross-sectional dimensions of the adapter (7); the cross-sectional dimensions of the node connector (15) are adapted to the cross-sectional dimensions of the replaceable energy dissipation connector (8).

5. The prefabricated ductile energy dissipation joint for reinforced concrete frames according to claim 3, characterized in that: The upper horizontal stiffening anchor plate (4.1) has a first hole (20) in the middle of its surface; the upper precast column (1) has upper column main reinforcement bars (1.1) spaced apart near the column center axis; the lower end of the upper column main reinforcement bars (1.1) near the column center axis passes through the first hole (20).

6. The prefabricated ductile energy dissipation joint for reinforced concrete frames according to claim 2, characterized in that: The lower horizontal stiffening anchor plate (5.1) has a second hole (21) in the middle of its surface; the lower precast column (2) has a lower column main reinforcement (2.1) spaced apart near the column center axis; the lower end of the lower column main reinforcement (2.1) near the column center axis passes through the second hole (21).

7. The prefabricated ductile energy dissipation joint for reinforced concrete frames according to claim 5, characterized in that: The cavity between the upper horizontal stiffening anchor plate (4.1) and the lower horizontal stiffening anchor plate (5.1) in the upper connecting cylinder (4) and the lower connecting cylinder (5) is filled with concrete; the upper precast column (1) has a grouting channel (9) that is connected to the cavity.

8. The prefabricated ductile energy dissipation joint for reinforced concrete frames according to claim 5, characterized in that: The diameter of the arc-shaped notch (6) is not less than 1 / 3 of the height of the adapter (7).

9. A construction method for a prefabricated ductile energy dissipation joint for a reinforced concrete frame as described in any one of claims 1-8, characterized in that, The steps include the following: Step 1: Fabrication of upper precast column (1), lower precast column (2) and precast beam (3): When fabricating the upper precast column (1), the upper column main reinforcement (1.1) is passed through the upper horizontal stiffening anchor plate (4.1), and the upper horizontal stiffening anchor plate (4.1) is fixed to the upper precast column (1) with the second nut (22); when fabricating the lower precast column (2), the lower column main reinforcement (2.1) is passed through the lower horizontal stiffening anchor plate (5.1), and the lower horizontal stiffening anchor plate (5.1) is fixed to the lower precast column (2) with the first nut (18); when fabricating the precast beam (3), node connectors (15) are pre-embedded in the precast beam (3); Step 2: Install the lower precast column (2) into place; Step 3: Hoist the precast column (1) and align the upper connecting cylinder (4) with the lower connecting cylinder (5); Step 4: After verifying that the position of the upper precast column (1) is correct, butt welds are used to connect the upper connecting cylinder (4) and the lower connecting cylinder (5) at the joint. Step 5: Weld the adapter (7) to the upper connecting cylinder (4) and the lower connecting cylinder (5) into a whole; Step 6: Hoist the replaceable energy dissipation connector (8), align the left end plate of the replaceable energy dissipation connector (8) with the adapter (7), and connect the replaceable energy dissipation connector (8) and the adapter (7) with the first high-strength bolt (14); Step 7: Hoist the precast beam (3), align the node connector (15) with the right end plate of the replaceable energy dissipation connector (8), and connect the node connector (15) and the replaceable energy dissipation connector (8) with the second high-strength bolt (16). The construction is now complete.

10. The construction method for prefabricated ductile energy dissipation joints for reinforced concrete frames according to claim 9, characterized in that: When the upper precast column (1) has a grouting channel (9) that is connected to the cavity between the upper horizontal stiffening anchor plate (4.1) and the lower horizontal stiffening anchor plate (5.1), the grouting pipe is inserted into the cavity from the grouting channel (9) and grout is injected into the cavity and the grouting channel (9).

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