Hybrid connection and assembly integral concrete frame beam column T-shaped joint

Abstract

The invention relates to a mixed dry type connection assembly integral concrete frame beam column T-shaped joint which comprises a semi-precast beam, a precast column, a first connecting steel bar, a second connecting steel bar, a first steel plate connecting key, a second steel plate connecting key, a K-shaped joint, a first plate hoop, a second plate hoop, a first inclined tie bar and a second inclined tie bar. Wherein the prefabricated columns are vertically through, the first beam bottom steel plate connecting keys are connected with the first inclined tie bars and are poured into a whole through concrete to form corbel-shaped shear keys, and the beam top and the beam bottom are vertically symmetrically arranged to jointly form K-shaped joints; the two ends of the connecting key are connected through steel plates to define a first plate hoop and a second plate hoop. The tail end of the connecting end of the semi-precast beam is arranged to be a trapezoid notch, main ribs on the upper portion and the lower portion of the semi-precast beam extend outwards and are provided with screw threads, penetrate through the through holes in the steel plate of the steel plate connecting key and the trapezoid notch to be inserted into the K-shaped joint, the contact faces are tightly attached, the steel plate of the steel plate connecting key is fixed through nuts, the dry-type T-shaped connecting joint is formed, and force can be directly transmitted without grouting. And the anti-corrosion protection is realized by plastering and leveling.

Description

Technical Field

[0001] The invention belongs to the field of reinforced concrete buildings and relates to a concrete structure installation node, in particular to a novel prefabricated assembled T-shaped node. Background Art

[0002] Prefabricated frame structures can greatly improve construction capacity and speed, save a lot of labor and ensure construction quality. The connection method in the prefabricated frame structure system is the core problem of the structure, and it is also the weak link of the structure. Only when the joints of the prefabricated components are reliably connected can the safety and reliability of the structure be guaranteed. At present, there are two conventional beam-column connections. One is to use the composite beam method. Although this method can well ensure the integrity and connection reliability of the node, there is a large amount of cast-in-place work. Most of the nodes are wet operations on site, the reinforcement is complex, difficult to operate, and the construction cycle is slow. The other is to use prestressed steel strands to penetrate the entire semi-prefabricated beam to reserve a channel, but the prestressed tendon perforation workload is large, the long channel grouting construction is inconvenient, and it is not easy to install, which reduces the construction flexibility and construction speed of the prefabricated frame structure. For the beam-column nodes of the prefabricated frame structure, in order to simplify the connection structure and construction process as much as possible and improve the construction efficiency of the beam-column node connection, it is urgent to develop a new frame beam-column connection node, which can simplify the on-site construction, facilitate on-site operation, simplify the construction process, and reduce the assembly time under the premise of meeting the bearing capacity performance.

[0003] In order to further improve the construction efficiency of beam-column node connections, reduce cast-in-place work, and well ensure the integrity and connection reliability of the nodes, the present invention has developed a hybrid connection assembled integral concrete frame beam-column T-node according to relevant regulations. Summary of the invention

[0004] The purpose of the present invention is to solve the above defects and provide a hybrid dry connection assembled integral concrete frame beam-column T-type node, which has the characteristics of simple construction, clear force transmission, good force performance, and is conducive to improving the assembly efficiency of the beam-column node.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: A hybrid connection assembled integral concrete frame beam-column T-shaped node of the present invention comprises a semi-prefabricated beam, a prefabricated column, a connecting steel bar 1, a connecting steel bar 2, a steel plate connecting key 1, a steel plate connecting key 2, a K-shaped node, a plate hoop 1, a plate hoop 2, a diagonal tie bar 1, a diagonal tie bar 2 and a post-cast concrete superposition layer; The prefabricated column is connected vertically at the node, and the steel plate connection key 1 and the steel plate connection key 2 are arranged symmetrically in the node area; the surface of the prefabricated column connecting one side of the semi-prefabricated beam in the node area is flush with the upper and lower surfaces of the semi-prefabricated beam, and is fixed to the prefabricated column by the oblique tie bars 1 and the oblique tie bars 2, and the steel plate connection key 1 and the steel plate connection key 2 are prefabricated as a whole with the oblique tie bars 1 and the oblique tie bars 2 by concrete casting to form a K-type node; the K-type node is also used as a corbel in installation and positioning, and also serves as an upper and lower shear key in structural stress; The semi-prefabricated beam is inserted in the middle of the K-shaped node, and the steel plate connecting key 1 and the steel plate connecting key 2 on the prefabricated column are connected to the semi-prefabricated beam through the main reinforcement at the top of the beam and the main reinforcement at the bottom of the beam; The two ends of the two symmetrical steel plate connecting keys on both sides of the prefabricated column are connected with steel plates to form a rectangular plate hoop of the same size as the prefabricated column, the upper part of the node area is plate hoop 1, and the lower part of the node area is plate hoop 2; The post-cast concrete superimposed layer is arranged on the top of the semi-precast beam, and the post-cast reinforced concrete layer is formed by covering the main reinforcement skeleton on the upper part of the semi-precast beam by integrally pouring concrete for a second time; The first steel plate connecting key and the second steel plate connecting key are both provided with through holes at positions corresponding to the main reinforcement at the bottom of the semi-prefabricated beam and the main reinforcement at the top of the beam.

[0006] Furthermore, the oblique tie bars 1 and 2 form angles of 135° and 45° with the prefabricated columns respectively, and are provided with hooks at the ends to be connected to the vertical main bars in the columns.

[0007] Furthermore, the end of the semi-prefabricated beam is trapezoidal and inserted into the K-type node, so that the slope surface of the trapezoidal notch fits tightly with the slope surface of the K-type node of the prefabricated column.

[0008] Furthermore, the main reinforcement at the bottom of the semi-prefabricated beam and the main reinforcement at the top of the beam are provided with threaded extension sections, which respectively pass through the through holes on the steel plate on the side of the steel plate connecting key 1 and the steel plate connecting key 2 away from the column. The outer side of the steel plate on the side of the steel plate connecting key away from the column is fixed with a single nut, and the inner side is fixed with a double nut to form a dry connection node, thereby controlling the longitudinal force-bearing steel bars at the top of the beam to prevent slippage.

[0009] Furthermore, the dry connection node does not need grouting to directly transmit force, and plastering and leveling are performed on the bottom of the steel plate connection key to achieve anti-corrosion protection of the connection node; the plastering thickness should not exceed 35 mm.

[0010] Furthermore, the steel plate connecting key 1 and the steel plate connecting key 2 are respectively fixed to the prefabricated column through nuts through the pre-embedded connecting steel bars 1 and 2 in the prefabricated column, and are also used as corbels and corbel shear keys, thereby reducing the support erection process, shortening the construction period, and saving costs.

[0011] Furthermore, the steel plate connecting key 1 and the steel plate connecting key 2 are respectively connected to the main reinforcement at the top of the beam and the main reinforcement at the bottom of the beam to form a reinforced connection node of the beam main reinforcement, thereby improving the bonding and anchoring capacity of the beam main reinforcement and the ability to resist positive bending moment, thereby improving the bearing capacity of the beam-column node.

[0012] Furthermore, the plate hoop 1 and the plate hoop 2 are fixed to the prefabricated column by nuts, which limits the lateral deformation of the column, improves the lateral force resistance of the column, and prevents lateral deformation.

[0013] Furthermore, the width of the steel plate connecting key 1 and the steel plate connecting key 2 should be no less than 5t, the height should be consistent with the width, no more than 1 / 3 of the beam height, and the length should be consistent with the beam width, where t is the nut thickness, and the plate hoop size 1 and the plate hoop size 2 should be consistent with the size of the prefabricated column.

[0014] Further, the construction method of a hybrid connection assembled integral concrete frame beam-column T-node, the method implementation steps are as follows: S1: Prefabrication stage: The prefabricated column is connected vertically at the node, and the steel plate connection key 1 and the steel plate connection key 2 are arranged symmetrically in the node area. The surface of the prefabricated column connecting one side of the semi-prefabricated beam in the node area is flush with the upper and lower surfaces of the semi-prefabricated beam. The prefabricated column is fixed to the prefabricated column through the oblique tie bars 1 and 2, and the steel plate connection key 1 and the steel plate connection key 2 are cast and prefabricated with the oblique tie bars 1 and 2 by concrete to form a K-type node; the two ends of the two symmetrical steel plate connection keys are connected with steel plates to form a rectangular plate hoop of the same size as the prefabricated column, the plate hoop 1 on the node area and the plate hoop 2 at the bottom of the node area; the steel plate connection key 1 and the steel plate connection key 2 are respectively fixed to the prefabricated column through the pre-embedded connecting steel bars 1 and 2 in the prefabricated column through nuts, the end of the semi-prefabricated beam is trapezoidal, and the main bars at the top and bottom of the semi-prefabricated beam are provided with threaded extension sections; S2: The semi-precast beam is hoisted into place and inserted into the K-type node. It passes through the through holes on the steel plate on the side away from the column of the steel plate connection key 1 and the steel plate connection key 2 respectively. The outer side of the steel plate on the side away from the column is fixed with a single nut, and the inner side is fixed with a double nut. The composite layer concrete on the upper part of the precast beam is poured for the second time to complete the assembly of the T-beam-column node, and the bottom of the steel plate connection key is plastered and leveled to achieve an anti-corrosion effect.

[0015] Working principle: The present invention discloses a hybrid connection assembly integral concrete frame beam-column T-node, wherein the precast column is vertically penetrated at the node, and the first steel plate connection key and the second steel plate connection key are symmetrically arranged in the node area; the surface of the precast column connecting one side of the semi-precast beam in the node area is flush with the upper and lower surfaces of the semi-precast beam, and is fixed to the precast column by the first oblique tie bar and the second oblique tie bar, and the first steel plate connection key and the second steel plate connection key are prefabricated as a whole with the first oblique tie bar and the second oblique tie bar by concrete pouring to form a K-node; the semi-precast beam is inserted into the K-type In the middle of the node, the steel plate connection key 1 and the steel plate connection key 2 on the precast column are connected to the semi-precast beam through the main reinforcement at the top and bottom of the beam; the two symmetrical steel plate connection keys on both sides of the precast column are connected at both ends with steel plates to form a rectangular plate hoop of the same size as the precast column, the plate hoop 1 is at the upper part of the node area, and the plate hoop 2 is at the lower part of the node area; the post-cast reinforced concrete layer is formed by covering the main reinforcement skeleton on the upper part of the semi-precast beam through the overall secondary pouring of concrete, completing the T-beam-column node assembly, and the bottom of the steel plate connection key is plastered and leveled to achieve an anti-corrosion effect.

[0016] The beneficial effects of the present invention are: A dry connection method is designed, which connects the beam-column joints through steel plate connection keys, so that no grouting is required and the anti-corrosion effect is achieved through secondary plastering, and the connection stiffness of the node area is strengthened by bending steel bars and diagonal tie bars. The invention improves the connection stiffness of the beam-column joints, facilitates construction, and improves economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a hybrid dry-connected assembled integral concrete frame beam-column T-node structure; Figure 2 A schematic diagram of a hybrid dry-connected assembled monolithic concrete frame beam-column T-joint connection; Figure 3 It is a front view of the plate hoop and steel bar connection key of a hybrid dry connection assembled integral concrete frame beam-column T-joint; Figure 4 A side view of a plate hoop and a steel bar connection key of a T-shaped node of a hybrid dry-connected assembled integral concrete frame beam-column; Figure 5 A top view of a plate hoop and steel bar connection key of a T-shaped node of a hybrid dry-connected assembled integral concrete frame beam-column; Figure 6 The three-dimensional schematic diagram of plate hoop 1 and plate hoop 2 of a hybrid dry-connected assembled integral concrete frame beam-column T-joint.

[0018] In the figure: 1. Main reinforcement at the top of the beam; 2. Stirrups inside the beam; 3. Main reinforcement at the bottom of the beam; 4. Main reinforcement at the column; 5. One oblique tie bar; 6. One steel plate connection key; 7. One connecting steel bar; 8. Two connecting steel bars; 9. Thread; 10. Nut; 11. One plate hoop; 12. Precast column; 13. Semi-precast beam; 14. Pad; 15. Two plate hoop; 16. K-type node; 17 Two oblique tie bars; 18. Two steel plate connection keys. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention. Example 1

[0020] like Figures 1 to 6 , which are, in sequence, a structural schematic diagram of a specific embodiment of an assembled beam-column node of a hybrid-connected assembled integral concrete frame beam-column T-node provided in the present invention, a schematic diagram of the connection between the main reinforcement of the beam and the main reinforcement of the beam in the column, a front view, a side view, a top view of a plate hoop 1, a plate hoop 2 and a steel bar connection key, and a three-dimensional schematic diagram of the plate hoop 1 and the plate hoop 2. An embodiment of the present invention provides a hybrid-connected assembled integral concrete frame beam-column T-node, comprising: a semi-prefabricated beam 13, a prefabricated column 12, a connecting steel bar 1 7, a connecting steel bar 2 8, a steel plate connection key 1 6, a steel plate connection key 2 18, a K-type node 16, a plate hoop 1 11, a plate hoop 2 15, an oblique tie bar 1 5 and an oblique tie bar 2 17; the prefabricated column 12 is continuously connected from top to bottom, and the steel plate connection key 1 6 and the steel plate connection key 2 18 are symmetrically arranged in the node area from top to bottom. In the node area, the prefabricated column 12 is connected to the surface of one side of the semi-prefabricated beam 13, which is flush with the upper and lower surfaces of the semi-prefabricated beam 13. The above-mentioned steel plate connection key 1 6 (steel bar connection key 2 18) refers to Figure 3-5 It is a steel plate box assembled from steel plates, with through holes opened on both sides of the steel plate box at the positions corresponding to the main reinforcement 1 at the top of the semi-prefabricated beam 12 and the main reinforcement 3 at the bottom of the beam. Figure 6 As shown, the two ends of the steel plate connection key 1 6 (rebar connection key 2 18) are connected with steel plates to form a rectangular plate hoop of the same size as the prefabricated column 12. The upper part of the node area is the plate hoop 11, and the lower part of the node area is the plate hoop 2 15. For specific plate hoop construction, refer to Figure 3-5 .

[0021] like Figure 1As shown, the steel plate connection key 1 6 is prefabricated with the oblique tie bar 1 5 and the concrete casting to form a trapezoidal shear key, and the connecting steel bar 1 7 passes through the steel plate through hole and is connected to the steel plate connection key 1 through the nut 10. The steel plate connection key 2 6 is prefabricated with the oblique tie bar 2 17 and the concrete casting to form an inverted bracket shear key, and the connecting steel bar 2 8 passes through the steel plate through hole and is connected to the steel plate connection key 2 17 through the nut 10. The trapezoidal shear key and the inverted bracket shear key form a K-type node 16. The semi-precast beam 13 is inserted in the middle of the K-type node 16, and the precast column 12 is connected to the semi-precast beam 13 through the main bars 1 and 3 at the top and bottom of the beam. The post-cast concrete superposition layer 17 is set on the top of the semi-precast beam 13, and the post-cast reinforced concrete layer 17 is formed by covering the upper main bar skeleton of the semi-precast beam 13 through the overall secondary concrete casting. Example 2

[0022] The specific implementation method of the above beam-column node includes the following steps: S1: Prefabrication stage: The prefabricated column 12 is connected vertically at the node, and the steel plate connection key 16 and the steel plate connection key 2 18 are arranged symmetrically in the node area. The prefabricated column 12 is connected to the surface of one side of the semi-prefabricated beam 13 in the node area, and is flush with the upper and lower surfaces of the semi-prefabricated beam 13. The prefabricated column 12 is fixed with the oblique tie bar 15 and the oblique tie bar 26, and the steel plate connection key 16 and the steel plate connection key 2 18 are cast and prefabricated as a whole with the oblique tie bar 15 and the oblique tie bar 26 to form a K-type node 16. The two ends of the steel plate connection key 16 and the steel plate connection key 2 18 are connected with steel plates to form a rectangular plate hoop of the same size as the prefabricated column, the plate hoop 11 is on the node area, and the plate hoop 2 15 is at the bottom of the node area. The steel plate connecting key 1 6 and the steel plate connecting key 2 18 are respectively fixed to the prefabricated column through the pre-buried connecting steel bar 1 7 and the connecting steel bar 2 8 in the prefabricated column 12 through nuts. The end of the semi-prefabricated beam 13 is trapezoidal, and the main reinforcement 1 at the top and the main reinforcement 4 at the bottom of the semi-prefabricated beam 13 are provided with threaded extension sections. S2: The semi-prefabricated beam is hoisted in place and inserted into the K-type node, passing through the through holes on the steel plate connecting key 1 6 and the steel plate connecting key 2 18 on the side away from the column, and the outer side of the steel plate on the side of the steel plate connecting key away from the column is fixed with a single nut 10, and the inner side is fixed with a double nut 10. The T-beam-column node is assembled, and the bottom of the steel plate connecting key is plastered and leveled to achieve an anti-corrosion effect.

[0023] In the embodiment of the present invention, the angles between the oblique tie bar 1 5 and the oblique tie bar 2 17 and the prefabricated column 12 are 45° and 135° respectively, and hooks are provided at the ends to connect with the vertical main bars in the column.

[0024] In the embodiment of the present invention, the end of the semi-prefabricated beam 13 is trapezoidal, and the main reinforcement 3 at the bottom of the semi-prefabricated beam 13 and the main reinforcement 1 at the top of the beam are provided with a threaded extension section, which respectively passes through the through holes on the steel plate connecting key 6 and the steel plate connecting key 18 on the side of the steel plate away from the column. The outer side surface of the steel plate on the side of the steel plate connecting key away from the column is fixed with a single nut 10, and the inner side surface is fixed with a double nut 10 to form a dry connection node, thereby controlling the longitudinal force-bearing steel bars at the top of the beam to prevent slippage.

[0025] In the embodiment of the present invention, the steel plate connecting key 1 6 and the steel plate connecting key 18 are respectively fixed to the prefabricated column 12 by means of nuts 10 through the pre-embedded connecting steel bars 1 7 and 8 in the prefabricated column, and are also used as corbels and corbel shear keys to reduce support and prevent the semi-prefabricated beam 13 from slipping.

[0026] In the embodiment of the present invention, the semi-prefabricated beam 13 is provided with a trapezoidal overhanging section, and during installation, the slope surface of the trapezoidal notch is closely fitted with the slope surface of the K-type node of the prefabricated column 12.

[0027] In the embodiment of the present invention, the dry connection node formed by connecting the steel plate connection key 1 and the steel plate connection key 2 with the main reinforcement 3 and 1 at the bottom and top of the beam does not need to be grouted to directly transmit force. Plastering and leveling are performed at the bottom of the steel plate connection key to achieve anti-corrosion protection of the connection node; the plastering thickness should not exceed 35 mm.

[0028] In the embodiment of the present invention, the steel plate connecting key 1 6 and the steel plate connecting key 2 18 are respectively connected to the main reinforcement 1 at the top of the beam and the main reinforcement 3 at the bottom of the beam to form a reinforced connection node of the main reinforcement of the beam, thereby improving the anchoring capacity of the main reinforcement of the beam and the ability to resist positive bending moment, thereby improving the bearing capacity of the beam-column node.

[0029] In the embodiment of the present invention, the plate hoop 11 and the plate hoop 2 15 are connected and fixed to the prefabricated column 12 by the nut 10, which limits the lateral deformation of the column, improves the lateral force resistance of the column, and prevents lateral deformation.

[0030] In the embodiment of the present invention, the width of the steel plate connecting key should be no less than 5t, the height should be consistent with the width, no more than 1 / 3 of the height of the semi-prefabricated beam 13, and the length should be consistent with the beam width, where t is the thickness of the nut 10, and the sizes of the plate hoops one and two should be consistent with the sizes of the prefabricated column 12.

[0031] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. The prefabricated beam-column node provided by the present invention is introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A hybrid connection assembled integral concrete frame beam-column T-joint, characterized in that: It includes semi-precast beams, precast columns, connecting steel bars 1, connecting steel bars 2, steel plate connecting keys 1, steel plate connecting keys 2, K-type nodes, plate hoops 1, plate hoops 2, oblique tie bars 1, oblique tie bars 2 and post-cast concrete superposition layers; The prefabricated column is connected vertically at the node, and the steel plate connection key 1 and the steel plate connection key 2 are arranged symmetrically in the node area; the surface of the prefabricated column connecting one side of the semi-prefabricated beam in the node area is flush with the upper and lower surfaces of the semi-prefabricated beam, and is fixed to the prefabricated column by the oblique tie bars 1 and the oblique tie bars 2, and the steel plate connection key 1 and the steel plate connection key 2 are prefabricated as a whole with the oblique tie bars 1 and the oblique tie bars 2 by concrete casting to form a K-type node; the K-type node is also used as a corbel in installation and positioning, and also serves as an upper and lower shear key in structural stress; The semi-prefabricated beam is inserted in the middle of the K-shaped node, and the steel plate connecting key 1 and the steel plate connecting key 2 on the prefabricated column are connected to the semi-prefabricated beam through the main reinforcement at the top of the beam and the main reinforcement at the bottom of the beam; The two ends of the two symmetrical steel plate connecting keys on both sides of the prefabricated column are connected with steel plates to form a rectangular plate hoop of the same size as the prefabricated column, the upper part of the node area is plate hoop 1, and the lower part of the node area is plate hoop 2; The post-cast concrete superimposed layer is arranged on the top of the semi-precast beam, and the post-cast reinforced concrete layer is formed by covering the main reinforcement skeleton on the upper part of the semi-precast beam by integrally pouring concrete for a second time; The first steel plate connecting key and the second steel plate connecting key are both provided with through holes at positions corresponding to the main reinforcement at the bottom of the semi-prefabricated beam and the main reinforcement at the top of the beam.

2. According to claim 1, a hybrid connection assembled integral concrete frame beam-column T-node is characterized in that: The oblique tie bars 1 and 2 respectively form angles of 135° and 45° with the prefabricated columns, and are provided with hooks at the ends to be connected with the vertical main bars in the columns.

3. According to claim 1, a hybrid connection assembled integral concrete frame beam-column T-node is characterized in that: The end of the semi-prefabricated beam is trapezoidal and inserted into the K-type node so that the slope surface of the trapezoidal notch fits tightly with the slope surface of the K-type node of the prefabricated column.

4. According to claim 1, a hybrid connection assembled integral concrete frame beam-column T-node is characterized in that: The main reinforcement at the bottom of the semi-prefabricated beam and the main reinforcement at the top of the beam are provided with threaded extension sections, which respectively pass through the through holes on the steel plate on the side of the steel plate connecting key 1 and the steel plate connecting key 2 away from the column. The outer side of the steel plate on the side of the steel plate connecting key away from the column is fixed with a single nut, and the inner side is fixed with a double nut to form a dry connection node, thereby controlling the longitudinal force-bearing steel bars at the top of the beam to prevent slippage.

5. According to claim 4, a hybrid connection assembled integral concrete frame beam-column T-node is characterized in that: The dry connection node does not require grouting to directly transmit force, and plastering and leveling are performed at the bottom of the steel plate connection key to achieve anti-corrosion protection for the connection node; the plastering thickness should not exceed 35 mm.

6. The hybrid connection assembled integral concrete frame beam-column T-node according to claim 1, characterized in that: The steel plate connecting key 1 and the steel plate connecting key 2 are respectively fixed to the prefabricated column through nuts through the pre-embedded connecting steel bars 1 and 2 in the prefabricated column, and are also used as corbels and corbel shear keys, reducing the support erection process, shortening the construction period, and saving costs.

7. The hybrid connection assembled integral concrete frame beam-column T-joint according to claim 1, characterized in that: The steel plate connecting key 1 and the steel plate connecting key 2 are respectively connected to the main reinforcement at the top of the beam and the main reinforcement at the bottom of the beam to form a reinforced connection node of the beam main reinforcement, thereby improving the bonding and anchoring capacity of the beam main reinforcement and the ability to resist positive bending moment, thereby improving the bearing capacity of the beam-column node.

8. The hybrid connection assembled integral concrete frame beam-column T-joint according to claim 1, characterized in that: The plate hoop 1 and the plate hoop 2 are connected and fixed on the prefabricated column by nuts, which limits the lateral deformation of the column, improves the lateral force resistance of the column, and prevents lateral deformation.

9. The hybrid connection assembled integral concrete frame beam-column T-joint according to claim 1, characterized in that: The width of the steel plate connecting key 1 and the steel plate connecting key 2 should be no less than 5t, the height should be consistent with the width, no more than 1 / 3 of the beam height, and the length should be consistent with the beam width, where t is the nut thickness, and the plate hoop size 1 and the plate hoop size 2 should be consistent with the size of the prefabricated column.

10. A construction method for a hybrid connection assembled integral concrete frame beam-column T-joint as claimed in claim 1, characterized in that: The method is implemented as follows: S1: Prefabrication stage: The prefabricated column is connected vertically at the node, and the steel plate connection key 1 and the steel plate connection key 2 are arranged symmetrically in the node area. The surface of the prefabricated column connecting one side of the semi-prefabricated beam in the node area is flush with the upper and lower surfaces of the semi-prefabricated beam. The prefabricated column is fixed to the prefabricated column through the oblique tie bars 1 and 2, and the steel plate connection key 1 and the steel plate connection key 2 are cast and prefabricated with the oblique tie bars 1 and 2 by concrete to form a K-type node; the two ends of the two symmetrical steel plate connection keys are connected with steel plates to form a rectangular plate hoop of the same size as the prefabricated column, the plate hoop 1 on the node area and the plate hoop 2 at the bottom of the node area; the steel plate connection key 1 and the steel plate connection key 2 are respectively fixed to the prefabricated column through the pre-embedded connecting steel bars 1 and 2 in the prefabricated column through nuts, the end of the semi-prefabricated beam is trapezoidal, and the main bars at the top and bottom of the semi-prefabricated beam are provided with threaded extension sections; S2: The semi-precast beam is hoisted into place and inserted into the K-type node. It passes through the through holes on the steel plate on the side away from the column of the steel plate connection key 1 and the steel plate connection key 2 respectively. The outer side of the steel plate on the side away from the column is fixed with a single nut, and the inner side is fixed with a double nut. The composite layer concrete on the upper part of the precast beam is poured for the second time to complete the assembly of the T-beam-column node, and the bottom of the steel plate connection key is plastered and leveled to achieve an anti-corrosion effect.

Images