Anti-seismic joint structure for prefabricated concrete beam column

Abstract

The anti-seismic joint structure comprises the prefabricated concrete column, the prefabricated concrete beam and a joint connecting assembly connecting the prefabricated concrete column and the prefabricated concrete beam, and the joint connecting assembly comprises an embedded frame embedded in the prefabricated concrete column and a T-shaped embedded steel beam embedded in the prefabricated concrete beam; a soft steel energy dissipation connecting piece in threaded connection with the pre-buried frame is arranged on one side of the prefabricated concrete column, an inserting groove allowing the T-shaped pre-buried steel beam to be inserted therein is formed in the middle of the soft steel energy dissipation connecting piece, and the T-shaped pre-buried steel beam is connected with the soft steel energy dissipation connecting piece in a hinged mode. The joint has good energy dissipation capacity and ductility under the vibration effect, the anti-seismic performance of the whole structure is improved, the damage degree of the joint structure under the large earthquake effect is reduced, a firm whole is formed between the prefabricated concrete column and the prefabricated concrete beam, the bearing capacity of the structure is improved, and the joint structure is suitable for being used in a large earthquake. And the node is effectively prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and in particular to an earthquake-resistant node structure for prefabricated assembled concrete beams and columns. Background Art

[0002] In prefabricated concrete frame structural systems, prefabricated beam-column connection nodes often play a decisive role in structural performance (such as bearing capacity, structural stiffness, seismic performance, etc.), and also have a profound impact on the construction feasibility and construction method of prefabricated concrete frame structures. Therefore, the structural form of prefabricated concrete frames is often determined by the form of prefabricated beam-column connection nodes.

[0003] At present, prefabricated and assembled concrete structures have been widely used in the field of modern construction due to their advantages of industrialized production and high construction efficiency. However, the seismic performance of their beam-column joints is still a key bottleneck restricting structural safety. In the existing technology, prefabricated concrete beam-column joints mostly adopt traditional connection methods, such as grouting sleeve connection or bolt connection. Although these connection methods can achieve basic structural connection, when encountering a major earthquake, it is difficult for the node connection parts to meet the dual requirements of high strength and high ductility at the same time. When the vibration occurs, the stress concentration at the node is significant, causing the connection part to be damaged first, triggering the coordinated failure of the beam and column, and even causing the risk of overall collapse of the structure. In addition, the traditional nodes lack an effective energy dissipation mechanism and cannot fully dissipate the vibration energy, which further aggravates the degree of damage to the structure and poses certain safety hazards. Therefore, it is urgent to design a seismic node structure for prefabricated and assembled concrete beams and columns to solve the above problems. Summary of the Invention

[0004] In response to the problems in the related art, the present invention proposes a seismic-resistant node structure for prefabricated and assembled concrete beams and columns to overcome the technical problem that the traditional nodes proposed in the existing related art lack an effective energy dissipation mechanism, cannot fully dissipate the vibration energy, and further aggravate the degree of structural damage.

[0005] The technical solution of the present invention is achieved as follows: A seismic node structure for prefabricated assembled concrete beams and columns, comprising a precast concrete column, a precast concrete beam and a node connection assembly connecting the two, wherein the node connection assembly comprises an embedded frame embedded in the precast concrete column and a T-shaped embedded steel beam embedded in the precast concrete beam, and a mild steel energy-absorbing connector screwed to the embedded frame is provided on one side of the precast concrete column, a slot for inserting the T-shaped embedded steel beam is provided in the middle of the mild steel energy-absorbing connector, the T-shaped embedded steel beam and the mild steel energy-absorbing connector are connected by a hinge, a corbel is formed on one side of the precast concrete column by integrated casting, and a T-shaped embedded steel plate is embedded in the top of the corbel, seismic assemblies are provided on both sides of one end of the top of the T-shaped embedded steel plate and one end of the precast concrete beam, and a reinforcing connection assembly is provided in the middle of one end of the top of the T-shaped embedded steel plate and the bottom of the precast concrete beam.

[0006] Furthermore, first high-strength bolts extending equidistantly from the precast concrete column are fixed at both ends of the outer wall of one side of the embedded frame, and mounting holes equidistantly provided for the first high-strength bolts to pass through are provided at both ends of one side of the mild steel energy-absorbing connector, and one end of the first high-strength bolt is screwed with a first nut, which is fitted on the inner wall of the mild steel energy-absorbing connector.

[0007] Furthermore, a hinge hole is provided on the mild steel energy-absorbing connector and the T-shaped embedded steel beam, and a T-shaped twisted shaft is inserted into the inner wall of the hinge hole, a cap is sleeved on one end of the T-shaped twisted shaft, and screw holes with equal distances and annular distribution are provided on the cap and one end of the T-shaped twisted shaft, and a second high-strength bolt is screwed to the inner walls of two adjacent screw holes.

[0008] Furthermore, a reinforcement frame is welded between the other end of the top of the T-shaped embedded steel plate and the bottom of the mild steel energy-absorbing connector, and the reinforcement frame is attached to the side wall of the precast concrete column.

[0009] Furthermore, the seismic-resistant component includes a first viscoelastic damper installed on both ends of the outer wall of one side of the reinforcement frame and on both sides of one end of the precast concrete beam, and a second viscoelastic damper is installed on both sides of the top end of the T-shaped embedded steel plate and the bottom of the precast concrete beam.

[0010] Furthermore, the reinforced connection assembly includes a mortise and tenon groove opened in the middle of one end of the bottom of the precast concrete beam, and the top of the T-shaped embedded steel plate is fixed with a top mortise and tenon column mortised in the mortise and tenon groove, the top surface of the mortise and tenon groove is designed to be spherical, and the top of the top mortise and tenon column is fixed with a damping ball attached to the top surface of the mortise and tenon groove.

[0011] Furthermore, the inner wall of the mortise and tenon groove is provided with grooves distributed in an annular shape at equal distances, and the outer wall of the top tenon column is fixed with a convex strip inserted into the groove.

[0012] Furthermore, Z-shaped damping pads are installed at the corners on both sides of the T-shaped embedded steel beam and the surface of the soft steel energy-absorbing connector, and prestressed components passing through the precast concrete columns and precast concrete beams are provided at both ends of one side of the top of the T-shaped embedded steel beam and both ends of one side of the top of the embedded frame.

[0013] Furthermore, the prestressed component includes a plurality of first prestressed strands fixed on one side of the top of the T-shaped embedded steel beam, and a plurality of second prestressed strands are fixed on the top of one side of the embedded frame, the second prestressed strands and the first prestressed strands are both twisted together by a plurality of unbonded prestressed steel strands, one end of the first prestressed strand and one end of the second prestressed strand are both fixed with connecting screws, and the two connecting screws are both threaded with threaded sleeves, and reinforcement rods are fixed on the two threaded sleeves, and one end of the connecting screws is both threaded with a second nut.

[0014] Furthermore, the gaps of the node connection components are completely filled with concrete.

[0015] Beneficial effects of the present invention: 1. The present invention provides a seismic node structure for prefabricated assembled concrete beams and columns. Through the provision of a soft steel energy-absorbing connector, when vibration occurs, the soft steel energy-absorbing connector can first undergo plastic deformation, absorb and dissipate vibration energy, thereby reducing the vibration force exerted on the precast concrete columns and precast concrete beams. At the same time, the first viscoelastic dampers installed at both ends of the outer wall of one side of the reinforcement frame and on both sides of one end of the precast concrete beam, as well as the second viscoelastic dampers installed on both sides of the top end of the T-shaped embedded steel plate and on the bottom of the precast concrete beam, can further dissipate vibration energy and reduce the vibration response of the structure. The synergistic effect of these energy-absorbing devices enables the node to have better energy-absorbing capacity and ductility under vibration, thereby improving the seismic performance of the overall structure and reducing the degree of damage to the node structure under large earthquakes.

[0016] 2. The present invention provides a seismic node structure for prefabricated assembled concrete beams and columns, in which the embedded frame is tightly screwed to the mild steel energy-absorbing connector through a first high-strength bolt and a first nut, ensuring a reliable connection between the precast concrete column and the mild steel energy-absorbing connector, and the T-shaped embedded steel beam is hingedly connected to the mild steel energy-absorbing connector and fixed by a T-shaped twisted shaft, a cap and a second high-strength bolt, so that the load can be effectively transferred between the precast concrete beam and the mild steel energy-absorbing connector, and the structure has a certain rotation ability to adapt to the deformation requirements of the structure under vibration. In addition, the reinforcement frame welded to the other end of the top of the T-shaped embedded steel plate and the bottom of the mild steel energy-absorbing connector further enhances the connection strength and integrity of the node, so that a relatively solid whole is formed between the precast concrete column and the precast concrete beam, thereby improving the bearing capacity of the structure.

[0017] 3. The present invention provides an earthquake-resistant node structure for prefabricated assembled concrete beams and columns, which includes a mortise and tenon structure of a top tenon column and a mortise and tenon groove through a reinforced connection component arranged at the middle of one end of the top of the T-shaped embedded steel plate and the bottom of the precast concrete beam, and the top surface of the mortise and tenon groove is designed to be spherical, and a damping ball is fixed on the top of the top tenon column and fits on the top surface of the mortise and tenon groove. The cooperation between the inner wall groove of the mortise and the outer wall convex strip of the top tenon column not only realizes the initial positioning between the precast concrete beam and the T-shaped embedded steel plate, but also can alleviate the impact force under the action of vibration to a certain extent, prevent the node from relative sliding or detaching when subjected to force, enhance the shear resistance of the node in the horizontal direction, further strengthen the connection strength between the beams and columns, enhance the connection stability of the node, and effectively prevent the node from being damaged.

[0018] 4. The present invention provides a seismic-resistant node structure for prefabricated and assembled concrete beams and columns. By installing Z-shaped damping pads at the corners on both sides of the T-shaped embedded steel beam and on the surface of the soft steel energy-absorbing connector, it can play a role in buffering and shock absorption when the structure is subjected to stress and deformation, reduce direct collision and friction between components, and reduce the degree of damage to the structure. At the same time, the Z-shaped damping pads can also absorb part of the energy, further improving the seismic performance of the structure.

[0019] 5. The present invention provides a seismic node structure for prefabricated assembled concrete beams and columns. The prestressed components are arranged at both ends of one side of the top of the T-shaped embedded steel beam and at both ends of one side of the top of the embedded frame. The structure consists of a first prestressed strand, a second prestressed strand, a connecting screw, a threaded sleeve, a reinforcement rod and a second nut. By applying prestress, the initial stiffness of the node area can be improved and the deformation of the structure under normal use can be reduced. At the same time, the presence of prestress can offset part of the tensile stress generated by the load, reduce the possibility of cracks in the structure, improve the crack resistance of the structure, and extend the service life of the structure.

[0020] 6. The present invention provides a seismic-resistant node structure for prefabricated and assembled concrete beams and columns, in which the various parts of the node connection components adopt embedded and assembled connection methods, are prefabricated and processed in the factory, and installed on-site, reducing the amount of wet work on-site and improving construction efficiency. At the same time, the quality of the prefabricated components is easy to control, ensuring the quality and precision of the node connection, making the performance of the entire structure more reliable and stable, and filling the gaps in the node connection components with concrete, which can not only further enhance the integrity of the node, but also prevent external factors such as moisture and air from eroding the metal connectors inside the node, thereby improving the durability of the structure and extending the service life of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a seismic node structure for prefabricated assembled concrete beams and columns.

[0023] Figure 2 It is a three-dimensional cross-sectional view of a seismic node structure for prefabricated assembled concrete beams and columns.

[0024] Figure 3 This is a schematic diagram of the node connection component structure of a seismic-resistant node structure for prefabricated assembled concrete beams and columns.

[0025] Figure 4 This is a schematic diagram of the mounting holes and slot structure of a seismic-resistant node structure for prefabricated assembled concrete beams and columns.

[0026] Figure 5 Schematic diagram of the hinged hole structure of a seismic node structure for prefabricated assembled concrete beams and columns.

[0027] Figure 6 This is a schematic diagram of the cap and second high-strength bolt structure of an earthquake-resistant node structure for prefabricated assembled concrete beams and columns.

[0028] Figure 7 This is a schematic diagram of the screw hole structure of a seismic node structure for prefabricated assembled concrete beams and columns.

[0029] Figure 8 This is a schematic diagram of the top tenon column and raised strip structure of an earthquake-resistant node structure for prefabricated assembled concrete beams and columns.

[0030] Figure 9 This is a schematic diagram of the prestressed component structure of a seismic-resistant node structure for prefabricated assembled concrete beams and columns.

[0031] In the picture: 1. Precast concrete column; 2. Precast concrete beam; 3. Node connection assembly; 301. Embedded frame; 302. T-shaped embedded steel beam; 303. Mild steel energy dissipation connector; 304. Reinforcement frame; 305. T-shaped embedded steel plate; 306. First viscoelastic damper; 307. Second viscoelastic damper; 308. Reinforced connection assembly; 3081. Top tenon column; 3082. Damping ball; 3083. Raised strip; 3084. Tenon groove; 3085. Groove; 3 09. Z-type damping pad; 310. First high-strength bolt; 311. First nut; 312. T-type strand; 313. Mounting hole; 314. Slot; 315. Hinge hole; 316. Cap; 317. Second high-strength bolt; 318. Screw hole; 4. Corbel; 5. Prestressed assembly; 501. First prestressed strand; 502. Connecting screw; 503. Reinforcement rod; 504. Second prestressed strand; 505. Screw sleeve; 506. Second nut. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "disposed" should be understood in a broad sense. For example, they may refer to fixed connection or disposition, detachable connection or disposition, or integral connection or disposition. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0035] Example 1: According to an embodiment of the present invention, Please refer to Figure 1-Figure 7, a seismic node structure for prefabricated assembled concrete beams and columns, comprising a precast concrete column 1, a precast concrete beam 2 and a node connection component 3 connecting the two, the node connection component 3 comprising an embedded frame 301 embedded in the precast concrete column 1 and a T-shaped embedded steel beam 302 embedded in the precast concrete beam 2, and a mild steel energy-absorbing connector 303 screwed to the embedded frame 301 is provided on one side of the precast concrete column 1, a slot 314 for inserting the T-shaped embedded steel beam 302 is provided in the middle of the mild steel energy-absorbing connector 303, the T-shaped embedded steel beam 302 and the mild steel energy-absorbing connector 303 are connected by a hinge, one side of the precast concrete column 1 is integrally cast with a corbel 4, and the top of the corbel 4 is embedded with a T-shaped embedded steel plate 305, and both sides of one end of the top of the T-shaped embedded steel plate 305 are connected to the precast concrete column 1. An anti-seismic component is provided at one end of the precast concrete beam 2, and a reinforcement frame 304 is welded between the other end of the top of the T-shaped embedded steel plate 305 and the bottom of the mild steel energy-absorbing connector 303, and the reinforcement frame 304 is attached to the side wall of the precast concrete column 1. The anti-seismic component includes a first viscoelastic damper 306 installed at both ends of the outer wall of one side of the reinforcement frame 304 and on both sides of one end of the precast concrete beam 2, and a second viscoelastic damper 307 is installed on both sides of the top end of the T-shaped embedded steel plate 305 and the bottom of the precast concrete beam 2. Z-shaped damping pads 309 are installed at the corners on both sides of the T-shaped embedded steel beam 302 and the surface of the mild steel energy-absorbing connector 303, so that the node has better energy absorption capacity and ductility under vibration, improves the anti-seismic performance of the overall structure, and reduces the degree of damage to the node structure under the action of a large earthquake.

[0036] Specifically, first high-strength bolts 310 extending equidistantly from the precast concrete column 1 are fixed at both ends of the outer wall of one side of the embedded frame 301, and mounting holes 313 equidistantly provided at both ends of one side of the mild steel energy-absorbing connector 303 for the first high-strength bolts 310 to pass through are provided. One end of the first high-strength bolt 310 is screwed with a first nut 311, and the first nut 311 is fitted on the inner wall of the mild steel energy-absorbing connector 303. The gap in the node connection assembly 3 is completely filled with concrete, and the embedded frame 301 is tightly screwed to the mild steel energy-absorbing connector 303 through the first high-strength bolt 310 and the first nut 311, thereby ensuring a reliable connection between the precast concrete column 1 and the mild steel energy-absorbing connector 303.

[0037] Specifically, a hinge hole 315 is provided on the mild steel energy-absorbing connector 303 and the T-shaped embedded steel beam 302, and a T-shaped twisted shaft 312 is inserted into the inner wall of the hinge hole 315, and a cap 316 is sleeved on one end of the T-shaped twisted shaft 312. Screw holes 318 are equidistantly distributed in a ring shape on the cap 316 and one end of the T-shaped twisted shaft 312. Second high-strength bolts 317 are screwed to the inner walls of two adjacent screw holes 318, so that the load can be effectively transferred between the precast concrete beam 2 and the mild steel energy-absorbing connector 303, and it has a certain rotation ability to adapt to the deformation requirements of the structure under vibration.

[0038] Example 2 Reference Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 and Figure 8 Compared with the first embodiment, the present embodiment adds the following structure, so that the present invention has the function of preliminary positioning. A reinforcing connection component 308 is provided between the middle of the top end of the T-shaped embedded steel plate 305 and the bottom of the precast concrete beam 2. The reinforcing connection component 308 includes a mortise and tenon 3084 provided at the middle of the bottom end of the precast concrete beam 2, and a top mortise and tenon column 3081 mortised in the mortise and tenon 3084 is fixed on the top of the T-shaped embedded steel plate 305. The top surface of the mortise and tenon 3084 is designed to be spherical, and the top of the top mortise and tenon column 3081 is fixed with a spherical top surface. 84, the damping ball 3082 is arranged on the top surface, the inner wall of the mortise and tenon 3084 is provided with grooves 3085 which are distributed in an annular pattern at equal distances, and the outer wall of the top tenon column 3081 is fixed with a convex strip 3083 which is inserted into the groove 3085. The above-mentioned reinforced connection component 308 is used to achieve the preliminary positioning between the precast concrete beam 2 and the T-shaped embedded steel plate 305, and can also alleviate the impact force under the action of vibration to a certain extent, prevent the node from sliding or detaching relative to each other when subjected to force, enhance the shear resistance of the node in the horizontal direction, and further strengthen the connection strength between the beam and the column.

[0039] Example 3 Reference Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 and Figure 9Compared with the first embodiment, the present embodiment adds the following structure, so that the present invention has the function of improving the node stiffness and crack resistance. The two ends of the top side of the T-shaped embedded steel beam 302 and the two ends of the top of one side of the embedded frame 301 are provided with prestressed components 5 that pass through the precast concrete column 1 and the precast concrete beam 2. The prestressed component 5 includes a plurality of first prestressed strands 501 fixed to one side of the top of the T-shaped embedded steel beam 302, and a plurality of second prestressed strands 504 are fixed to the top of one side of the embedded frame 301. The second prestressed strands 504 and the first prestressed strands 501 are twisted together by a plurality of unbonded prestressed steel strands. One end of the first prestressed strand 501 is connected to the second prestressed strand 504. 04 is fixed with a connecting screw 502 at one end, and a threaded sleeve 505 is screwed on the two connecting screws 502, and a reinforcement rod 503 is fixed on the two threaded sleeves 505. One end of the connecting screw 502 is screwed with a second nut 506. By using the above-mentioned prestressed component 5, prestress is applied to the first prestressed strand 501 and the second prestressed strand 504 by rotating the threaded sleeve 505 and tightening the second nut 506, which can increase the initial stiffness of the node area and reduce the deformation of the structure under normal use. At the same time, the existence of prestress can offset part of the tensile stress generated by the load, reduce the possibility of cracks in the structure, improve the crack resistance of the structure, and extend the service life of the structure.

[0040] In summary, with the aid of the above technical solutions of the present invention, the working principle of the present invention is as follows: by passing the first high-strength bolt 310 through the mounting hole 313 and screwing it onto the first nut 311, and the first nut 311 being in contact with the inner wall of the mild steel energy-absorbing connector 303, a firm screw connection is achieved between the precast concrete column 1 and the mild steel energy-absorbing connector 303, so that the two become a relatively stable whole; Then, the precast concrete beam 2 is hoisted onto the bracket 4 by a crane, so that the T-shaped embedded steel beam 302 is inserted into the slot 314, and then the T-shaped twisted shaft 312 is passed through the mounting hole 313, and the cap 316 is fixed to one end of the T-shaped twisted shaft 312 by the second high-strength bolt 317. At this time, the T-shaped embedded steel beam 302 is hingedly connected to the mild steel energy-absorbing connector 303 through the cooperation of the T-shaped twisted shaft 312, the cap 316 and the second high-strength bolt 317. At this time, the precast concrete beam 2 and the precast concrete column 1 are preliminarily connected together through the node connection assembly 3, which can withstand a certain static load and realize the preliminary transmission of force. Then, the reinforcement frame 304 is welded to the other end of the top of the T-shaped embedded steel plate 305 and the bottom of the mild steel energy-absorbing connector 303; When dynamic loads such as vibration act on the structure, the soft steel energy-absorbing connector 303 will first undergo plastic deformation due to the soft steel characteristics of its own material. The plastic deformation of the soft steel energy-absorbing connector 303 can absorb and dissipate a large amount of vibration energy, thereby reducing the vibration force transmitted to the precast concrete column 1 and the precast concrete beam 2, and playing a preliminary energy dissipation and shock absorption role. In addition, the first viscoelastic damper 306 installed on both ends of the outer wall of one side of the reinforcement frame 304 and on both sides of one end of the precast concrete beam 2, and the second viscoelastic damper 307 installed on both sides of the top end of the T-shaped embedded steel plate 305 and the bottom of the precast concrete beam 2 The viscoelastic material inside the viscoelastic damper will deform during vibration, and through the friction between the molecules inside the material, the vibration energy will be converted into heat and dissipated, further reducing the vibration response of the structure, reducing the displacement and acceleration of the structure, and protecting the beam and column components. The Z-shaped damping pads 309 installed at the corners of the two sides of the T-shaped embedded steel beam 302 and the surface of the soft steel energy-absorbing connector 303 will elastically deform when the structural components produce relative movement due to the vibration force, buffering the collision and friction between the components, absorbing part of the vibration energy, and reducing structural damage. Next, the reinforcing connection component 308 provided at the middle of one end of the top of the T-shaped embedded steel plate 305 and the bottom of the precast concrete beam 2 comes into play. Since the mortise and tenon 3084 and the top mortise column 3081 are mortised with each other, the top surface of the mortise and tenon 3084 is designed to be spherical, and the top of the top mortise column 3081 is fixed with a damping ball 3082, as well as a matching groove 3085 and a ridge 3083. This structure realizes the preliminary positioning between the precast concrete beam 2 and the T-shaped embedded steel plate 305 during installation, which is convenient for accurate installation. Under the action of external forces such as vibration, the cooperation between the top mortise column 3081 and the mortise and tenon 3084, and the buffering effect of the damping ball 3082 can effectively alleviate the impact force and prevent relative sliding or separation between the precast concrete beam 2 and the T-shaped embedded steel plate 305, thereby enhancing the connection stability of the node and ensuring reliable transmission of force. The reinforcing rod 503 is also rotated to drive the threaded sleeve 505 to rotate, and the position of the connecting screw 502 is adjusted by the threaded connection between the threaded sleeve 505 and the connecting screw 502, so as to change the distance between the two adjacent connecting screws 502, and then the two adjacent second nuts 506 are tightened to apply prestress to the first prestressed strand 501 and the second prestressed strand 504. Under normal use, the prestress increases the initial stiffness of the node area and reduces the deformation of the structure. When the structure bears loads including vibration loads, the prestress can offset part of the tensile stress generated by the load, reduce the possibility of cracks in the structure, improve the crack resistance of the structure, and enable the structure to maintain better integrity and stability during the stress process.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 seismic node structure for prefabricated assembled concrete beams and columns, comprising a prefabricated concrete column (1), a prefabricated concrete beam (2), and a node connection assembly (3) connecting the two, characterized in that: The node connection assembly (3) comprises an embedded frame (301) embedded in the precast concrete column (1) and a T-shaped embedded steel beam (302) embedded in the precast concrete beam (2), and a soft steel energy-absorbing connector (303) screwed to the embedded frame (301) is provided on one side of the precast concrete column (1), and a slot (314) for inserting the T-shaped embedded steel beam (302) is provided in the middle of the soft steel energy-absorbing connector (303). ) is hingedly connected to the soft steel energy-absorbing connector (303), one side of the precast concrete column (1) is integrally cast with a corbel (4), and a T-shaped embedded steel plate (305) is embedded in the top of the corbel (4), and seismic resistant components are provided on both sides of one end of the top of the T-shaped embedded steel plate (305) and one end of the precast concrete beam (2), and a reinforced connection component (308) is provided in the middle of one end of the top of the T-shaped embedded steel plate (305) and the bottom of the precast concrete beam (2).

2. The seismic node structure for prefabricated concrete beams and columns according to claim 1, characterized in that: First high-strength bolts (310) extending equidistantly from the precast concrete column (1) are fixed to both ends of the outer wall of one side of the embedded frame (301), and mounting holes (313) for the first high-strength bolts (310) to pass through are opened at both ends of one side of the soft steel energy-absorbing connector (303), and one end of the first high-strength bolt (310) is screwed with a first nut (311), and the first nut (311) is attached to the inner wall of the soft steel energy-absorbing connector (303).

3. The seismic node structure for prefabricated concrete beams and columns according to claim 2, characterized in that: The mild steel energy-absorbing connector (303) and the T-shaped embedded steel beam (302) are both provided with hinge holes (315), and a T-shaped twisted shaft (312) is inserted into the inner wall of the hinge hole (315), a cap (316) is sleeved on one end of the T-shaped twisted shaft (312), and screw holes (318) distributed in an annular pattern at equal distances are provided on the cap (316) and one end of the T-shaped twisted shaft (312), and second high-strength bolts (317) are screwed to the inner walls of two adjacent screw holes (318).

4. The seismic node structure for prefabricated concrete beams and columns according to claim 3, characterized in that: A reinforcement frame (304) is welded between the other end of the top of the T-shaped embedded steel plate (305) and the bottom of the mild steel energy-absorbing connector (303), and the reinforcement frame (304) is attached to the side wall of the precast concrete column (1).

5. The seismic node structure for prefabricated assembled concrete beams and columns according to claim 4, characterized in that: The anti-seismic assembly comprises a first viscoelastic damper (306) installed at both ends of an outer wall of one side of the reinforcement frame (304) and at both sides of one end of the precast concrete beam (2), and a second viscoelastic damper (307) is installed at both sides of the top end of the T-shaped embedded steel plate (305) and at the bottom of the precast concrete beam (2).

6. The seismic node structure for prefabricated concrete beams and columns according to claim 5, characterized in that: The reinforced connection assembly (308) includes a mortise and tenon groove (3084) provided in the middle of one end of the bottom of the precast concrete beam (2), and a top mortise and tenon column (3081) mortised in the mortise and tenon groove (3084) is fixed on the top of the T-shaped embedded steel plate (305), the top surface of the mortise and tenon groove (3084) being designed to be spherical, and a damping ball (3082) affixed to the top surface of the mortise and tenon groove (3084) is fixed on the top of the top mortise and tenon column (3081).

7. The seismic node structure for prefabricated concrete beams and columns according to claim 6, characterized in that: The inner wall of the tenon groove (3084) is provided with grooves (3085) distributed in an annular pattern at equal distances, and the outer wall of the top tenon column (3081) is fixed with a convex strip (3083) inserted into the groove (3085).

8. The seismic node structure for prefabricated concrete beams and columns according to claim 7, characterized in that: Z-shaped damping pads (309) are installed at the corners on both sides of the T-shaped embedded steel beam (302) and on the surface of the soft steel energy-absorbing connector (303), and prestressed components (5) passing through the precast concrete column (1) and the precast concrete beam (2) are provided at both ends of one side of the top of the T-shaped embedded steel beam (302) and at both ends of one side of the top of the embedded frame (301).

9. The seismic node structure for prefabricated concrete beams and columns according to claim 8, characterized in that: The prestressed component (5) comprises a plurality of first prestressed strands (501) fixed to one side of the top of the T-shaped embedded steel beam (302), and a plurality of second prestressed strands (504) are fixed to the top of one side of the embedded frame (301), the second prestressed strands (504) and the first prestressed strands (501) are twisted together by a plurality of unbonded prestressed steel strands, one end of the first prestressed strand (501) and one end of the second prestressed strand (504) are fixed with connecting screws (502), and the two connecting screws (502) are both screwed with screw sleeves (505), and the two screw sleeves (505) are fixed with reinforcing rods (503), and one end of the connecting screws (502) is both screwed with second nuts (506).

10. The seismic node structure for prefabricated concrete beams and columns according to claim 9, characterized in that: The gaps in the node connection assembly (3) are completely filled with concrete.

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