A sawtooth bite type full dry connection RC beam-column node and its connection method

Abstract

This application discloses a serrated interlocking, fully dry-connected RC beam-column joint and connection method, belonging to the field of building structure technology. This serrated interlocking, dry-connected RC beam-column joint comprises a precast column, a precast beam, and a steel sleeve. The steel sleeve's steel plate is provided with unidirectional serrations on its inner surface. The precast column's end is embedded with an end plate with reverse serrations. The precast column and steel sleeve are dry-connected via the interlocking serrations. The steel sleeve is provided with a protruding connecting piece on its outer surface, which connects to a connecting piece on the beam, thereby connecting the beam to the steel sleeve and, in turn, to the column. A corbel is provided at the lower edge of the precast column's head to support the end of the precast beam. A horizontal, perforated diaphragm is provided within the steel sleeve to engage the shear keys between the upper and lower precast columns. This serrated interlocking dry-connected joint eliminates the need for steel reinforcement and secondary casting. The precast components have no exposed steel bars, significantly reducing on-site wet work and significantly improving construction efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of building structures, and in particular to a sawtooth-engaging, fully dry-connected RC beam-column node and a connection method. Background Art

[0002] In recent years, prefabricated structures have received widespread attention in the industry due to their energy-saving and emission reduction, modular construction, short construction period, and low cost. However, the seismic performance of prefabricated structures depends to a large extent on the structure of the nodes.

[0003] At present, the nodes of prefabricated concrete structures mostly adopt the equivalent cast-in-place connection method, which includes grouting sleeves and post-cast integral types. However, it has certain limitations in practical applications. First, the anchor steel bars extending from the ends of prefabricated components bring higher requirements to the production and transportation of components. Secondly, during the installation of components, due to the small node area and the large number of steel bar sources, steel bars in different directions are very likely to have position conflicts in the node area. The installation process also needs to carefully set the installation sequence to avoid the steel bars extending from the ends of the first-installed components interfering with the installation of the later-installed components, which is inefficient and inconvenient.

[0004] Therefore, the present application provides a serrated bite type fully dry connection RC beam-column node and connection method to solve the above problems. Summary of the Invention

[0005] The present application provides a sawtooth bite type fully dry connection RC beam-column node and connection method, which aims to solve the problems of low installation efficiency and inconvenience in actual application of the existing prefabricated concrete structure proposed in the background art.

[0006] To achieve the above objectives, the present application provides the following technical solutions: a sawtooth interlocking fully dry-connected RC beam-column node and connection method, comprising a precast column, a precast beam, and a steel sleeve, wherein a perforated diaphragm is fixedly disposed within the steel sleeve for dividing the interior of the steel sleeve into an upper connecting end and a lower connecting end of the steel sleeve, wherein the cross-sectional shapes of the upper connecting end and the lower connecting end of the steel sleeve respectively match the cross-sectional shapes of the ends of the precast column;

[0007] The outer periphery of both ends of the prefabricated column is pre-buried with a column end connecting steel plate, on which a plurality of saw teeth B or a plurality of saw teeth A are fixedly provided, and the upper connecting end of the steel sleeve and the lower connecting end of the steel sleeve are fixedly provided with saw teeth A or saw teeth B that match the saw teeth B or saw teeth A on the column end connecting steel plate;

[0008] A connecting piece is provided at the end of the prefabricated beam, and a connected piece compatible with the connecting piece is provided on the outside of the steel sleeve; since the prefabricated column, prefabricated beam and steel sleeve are all prefabricated in the factory, they only need to be simply assembled and connected by the engagement of the corresponding saw teeth B and saw teeth A during on-site installation. There is no need to wait for the post-poured concrete to reach strength before it can withstand the load, which can greatly reduce the amount of wet work on site and also meet the environmental protection requirements of energy saving and carbon reduction. In addition, the steel bars do not extend from the ends of the prefabricated columns, prefabricated beams and steel sleeves, which avoids complicated steel bar alignment and welding work, makes the installation process faster, and effectively shortens the construction period.

[0009] Preferably, in order to further improve the strength of the connection between the steel sleeve and the prefabricated columns at both ends, a corrugated steel pipe shear groove is opened at one end of the prefabricated column, and a corrugated steel pipe shear key that is compatible with the corrugated steel pipe shear groove is fixedly provided at the other end of the prefabricated column; the combined design of the corrugated steel pipe shear key and the corrugated steel pipe shear groove allows the prefabricated columns connected at both ends of the steel sleeve to be further connected to enhance the stability of the connection position.

[0010] Preferably, in order to facilitate the connection of the prefabricated columns at both ends of the steel sleeve, a through hole is provided on the open cross partition for the corrugated steel pipe shear key to pass through; due to the design of the through hole, when the prefabricated columns at both ends of the steel sleeve need to be connected, it is only necessary to make one end with the corrugated steel pipe shear key inserted directly pass through the through hole and plug it into the corrugated steel pipe shear groove of the other prefabricated column, so that the connection can be easily achieved, which greatly simplifies the connection process.

[0011] Preferably, in order to facilitate the observation of whether the prefabricated column and the steel sleeve are connected in place, an observation exhaust hole for observing the connection position of the prefabricated column is opened at the position of the open cross-partition on the outside of the steel sleeve corresponding to the position of the open cross-partition; the design of the observation exhaust hole makes it convenient for the operator to intuitively observe whether the insertion position of the prefabricated column is in place from the observation exhaust hole when the prefabricated column is inserted into the corresponding position in the steel sleeve, thereby ensuring the quality and safety of the construction.

[0012] Preferably, in order to facilitate the connection between the prefabricated beam and the steel sleeve, the connecting member is an E-shaped connecting keyway symmetrically fixedly arranged at the end of the prefabricated beam, and the connected member is an E-shaped connecting key fixedly arranged on the outside of the steel sleeve and adapted to the E-shaped connecting keyway; the adaptation design of the E-shaped connecting key and the E-shaped connecting groove can achieve precise positioning between the prefabricated beam and the steel sleeve, ensuring that no deviation will occur during the connection process, making the connection process more intuitive and simple.

[0013] Preferably, in order to facilitate the connection between the prefabricated beam and the steel sleeve, the connecting member is a serrated plate symmetrically fixedly arranged at the end of the prefabricated beam, and the connected member is a reverse serrated plate fixedly arranged on the outside of the steel sleeve and adapted to the serrated plate; the bite design of the serrated plate and the reverse serrated plate can ensure a tight bite relationship between the connecting member and the connected member, making the connection process of the prefabricated beam and the steel sleeve more intuitive and simple.

[0014] Preferably, in order to improve the connection strength of the E-shaped connecting keys, a number of stiffening ribs are welded between the E-shaped connecting keys located on two adjacent sides of the steel sleeve; the setting of the stiffening ribs can provide additional support and strength, and can withstand and transmit more shear force, tension and pressure, thereby enhancing the connection strength between the E-shaped connecting keys located on two adjacent sides of the steel sleeve, ensuring the quality and safety of construction.

[0015] Preferably, in order to improve the connection strength of the column end connecting steel plate, longitudinal reinforcement or steel bar connectors welded to the longitudinal reinforcement are pre-embedded in the prefabricated column, and the column end connecting steel plate is welded to the longitudinal reinforcement or the steel bar connectors welded to the longitudinal reinforcement; the pre-embedded method of welding the column end connecting steel plate to the longitudinal reinforcement or the steel bar connectors welded to the longitudinal reinforcement can enhance the strength of the connection, so that the column end connecting steel plate can better maintain its shape and stability when subjected to stress.

[0016] Preferably, in order to ensure the bite effect between the corresponding saw teeth A and saw teeth B, the cross-section of the saw tooth A is a right triangle, and the cross-section of the saw tooth B is an inverted right triangle; the right-angled triangle saw tooth A and the inverted right-angled triangle saw tooth B can form a close contact surface when biting, reducing the bite gap and improving the stability and reliability of the bite.

[0017] A node connection method for RC beam-columns with a sawtooth bite type full dry connection is disclosed. The node connection method is used for connecting the above-mentioned RC columns with a sawtooth bite type full dry connection. The method comprises the following steps:

[0018] S1. Prefabricate the required prefabricated columns, prefabricated beams and steel sleeves;

[0019] S2. Align the prefabricated steel sleeve in S1 with the prefabricated column to be installed in the lower layer, and use external force to squeeze the serrations B or A provided on the corresponding column end connecting steel plate and the serrations A or B provided in the lower connecting end of the steel sleeve to complete the bite connection between the steel sleeve and the prefabricated column in the lower layer;

[0020] S3, coupling the connector of the prefabricated beam prefabricated in S1 with the connected member provided on the steel sleeve in S2 to complete the connection between the prefabricated beam and the steel sleeve;

[0021] S4. Align the prefabricated columns in S1 that need to be installed on the upper layer with the steel sleeves in S3, and use external force to squeeze through the serrations B or A set on the corresponding column end connecting steel plates and the serrations A or B set in the lower connecting end of the steel sleeve to complete the bite connection between the steel sleeve and the prefabricated columns on the upper layer. At the same time, the corrugated steel pipe shear grooves installed under the prefabricated columns on the upper layer are coupled with the corrugated steel pipe shear keys installed on the prefabricated columns on the lower layer, thereby completing the connection process of the entire node.

[0022] Since the precast columns, precast beams and steel sleeves of this serrated engagement type fully dry-connected RC beam-column node are all prefabricated in the factory, on-site installation only requires simple assembly and connection through the engagement of the corresponding serrations B and A. There is no need to wait for the post-poured concrete to reach sufficient strength before it can withstand the load, which greatly reduces the amount of wet work on site and also meets the environmental protection requirements of energy conservation and carbon reduction. In addition, the ends of the precast columns, precast beams and steel sleeves do not extend out of the steel bars, avoiding complicated steel bar alignment and welding work, making the installation process faster and effectively shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a sawtooth-engaging full-dry connection node RC column in Example 1;

[0024] Figure 2 This is an exploded view of a zigzag interlocking full-dry connection node RC column in Example 1;

[0025] Figure 3 This is a schematic structural diagram of a prefabricated column in a sawtooth-engaging full-dry connection node in Example 1;

[0026] Figure 4 This is a schematic structural diagram of a sawtooth-engaging full-dry connection node connector in Example 1;

[0027] Figure 5 This is a schematic structural diagram of a connected component in a sawtooth-engaging, fully dry-type connection node in Example 1;

[0028] Figure 6 This is a schematic structural diagram of sawtooth A and sawtooth B, a sawtooth-engaging full-dry connection node in Example 1;

[0029] Figure 7 This is a schematic structural diagram of a sawtooth-engaging full-dry connection node RC column in Example 2;

[0030] Figure 8 This is an exploded view of a zigzag interlocking full-dry connection node RC column in Example 2;

[0031] Figure 9This is a schematic structural diagram of a connected component in a sawtooth-engaging, fully dry-type connection node in Example 2;

[0032] Figure 10 This is a structural schematic diagram of a connector in a sawtooth-engaging, fully dry connection node in Example 2;.

[0033] In the picture:

[0034] 110. Precast column; 1101. Corrugated steel pipe shear trough; 1102. Corrugated steel pipe shear key; 1103. Rebar connector; 1104. Column end connecting steel plate;

[0035] 120. Precast beam; 1201. Connector;

[0036] 130, steel sleeve; 1301, stiffening rib; 1302, observation vent; 1303, connected part; 1304, perforated diaphragm; 13041, through hole; 1305, upper connecting end of steel sleeve; 1306, lower connecting end of steel sleeve;

[0037] 140, sawtooth B;

[0038] 150. Sawtooth A. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application. Example

[0040] This embodiment provides a sawtooth bite type full dry connection RC beam-column node and connection method, such as Figures 1-6As shown, the sawtooth bite type full dry connection RC beam-column node includes a precast column 110, a precast beam 120 and a steel sleeve 130. The steel sleeve 130 is fixedly provided with an open cross-section plate 1304 for dividing the interior of the steel sleeve 130 into an upper connection end 1305 of the steel sleeve and a lower connection end 1306 of the steel sleeve. The cross-sectional shapes of the upper connection end 1305 of the steel sleeve and the lower connection end 1306 of the steel sleeve respectively match the cross-sectional shapes of the two ends of the precast column 110; the outer periphery of the two ends of the precast column 110 is pre-buried with The column end is connected to the steel plate 1104, on which a plurality of serrations B140 or a plurality of serrations A150 are fixedly provided, and the upper connecting end 1305 of the steel sleeve and the lower connecting end 1306 of the steel sleeve are both fixedly provided with serrations A150 or serrations B140 that match the serrations B140 or serrations A150 on the column end connecting steel plate 1104; a connecting piece 1201 is provided at the end of the prefabricated beam 120, and a connected piece 1303 that matches the connecting piece 1201 is provided on the outside of the steel sleeve 130.

[0041] Among them, the connecting part 1201 is an E-shaped connecting keyway symmetrically fixedly arranged at the end of the prefabricated beam 120, and the connected part 1303 is an E-shaped connecting key fixedly arranged on the outside of the steel sleeve 130 and adapted to the E-shaped connecting keyway. Except for the groove part, the rest of the E-shaped connecting keyway is welded to the longitudinal reinforcement web reinforcement in the prefabricated beam 120 to ensure a clear force transmission path.

[0042] It is worth mentioning that the length of the column end connecting steel plate 1104 is 1 / 10~1 / 12 of the height of the prefabricated column 110.

[0043] When in use, first place the prefabricated column 110 on the lower layer, and align the lower connecting end 1306 of the steel sleeve 130 with the prefabricated column 110 of the lower layer. Then, apply pressure to squeeze the serrations A150 or B140 on the column end connecting steel plate 1104 set around the prefabricated column 110 of the lower layer and the serrations B140 or A150 set in the lower connecting end 1306 of the steel sleeve. When elastic deformation occurs, they can be engaged with each other to complete the connection between the prefabricated column 110 of the lower layer and the steel sleeve 130. Then, before installing the prefabricated column 110 of the upper layer, first align the part of the prefabricated beam 120 with the E-shaped connecting keyway with the steel sleeve 1 The parts of 30 provided with E-shaped connecting keys are aligned, and pressure is applied to connect the E-shaped connecting key groove and the E-shaped connecting key, thereby completing the connection between the prefabricated beam 120 and the steel sleeve 130. Afterwards, the prefabricated column 110 installed on the upper layer is aligned with the part of the upper connecting end 1305 of the steel sleeve 130, and pressure is also applied to squeeze the serrations A150 or B140 provided on the column end connecting steel plate 1104 on the upper prefabricated column 110 and the serrations B140 and A150 provided in the upper connecting end 1305 of the steel sleeve. Elastic deformation occurs, so that they can engage with each other, thereby completing the connection between the prefabricated column 110 on the upper layer and the steel sleeve 130.

[0044] Specifically, a corrugated steel pipe shear groove 1101 is formed at one end of the prefabricated column 110, and a corrugated steel pipe shear key 1102 adapted to the corrugated steel pipe shear groove 1101 is fixedly provided at the other end of the prefabricated column 110; wherein, a through hole 13041 is formed on the perforated diaphragm 1304 for the corrugated steel pipe shear key 1102 to pass through;

[0045] When the prefabricated columns 110 are connected at both ends of the steel sleeve 130 through the engagement between the corresponding serrations B140 and serrations A150, one end of one of the inserted prefabricated columns 110 equipped with a corrugated steel pipe shear key 1102 can be simultaneously passed through the through hole 13041 set on the open cross-partition 1304 in the steel sleeve 130, and plugged into the corrugated steel pipe shear groove 1101 set on the other prefabricated column 110, so as to further ensure the stability and strength of the connection of the prefabricated columns 110 at both ends of the steel sleeve 130.

[0046] The corrugated steel pipe shear key 1102 is made of concrete poured inside the corrugated steel pipe, with a height of 50~80mm. It passes through the through hole 13041 and extends out of the open cross-section 1304 with a height of 40~70mm, which requires subtracting the thickness of the open cross-section 1304 by 10mm. Accordingly, the depth of the corrugated steel pipe shear groove 1101 is also 40~70mm to ensure that the two are coupled with each other.

[0047] In addition, in order to facilitate the observation of whether the prefabricated column 110 and the steel sleeve 130 are in place, an observation exhaust hole 1302 for observing the connection position of the prefabricated column 110 is opened at the position of the corresponding open cross partition 1304 on the outside of the steel sleeve 130; the design of the observation exhaust hole 1302 makes it convenient for the operator to intuitively observe whether the insertion position of the prefabricated column 110 is in place from the observation exhaust hole 1302 when the prefabricated column 110 is inserted into the corresponding position in the steel sleeve 130, thereby ensuring the quality and safety of the construction.

[0048] Furthermore, a plurality of stiffening ribs 1301 are welded between the connected parts 1303 on two adjacent surfaces of the steel sleeve 130;

[0049] When the steel sleeve 130 is prefabricated in the factory and the connected parts 1303 are assembled on the steel sleeve 130, a number of stiffening ribs 1301 can be welded between the connected parts 1303 on the two connected sides. Therefore, when in use, the stiffening ribs 1301 can provide additional support and strength, and can withstand and transmit more shear force, tension and pressure, thereby ensuring the quality and safety of construction.

[0050] Furthermore, longitudinal reinforcement or steel bar connectors 1103 welded to the longitudinal reinforcement are embedded in the prefabricated column 110, and the column end connecting steel plates 1104 are welded to the longitudinal reinforcement or steel bar connectors 1103 welded to the longitudinal reinforcement;

[0051] When the prefabricated column 110 is prefabricated in the factory and the column end connecting steel plate 1104 is embedded in the prefabricated column 110, the column end connecting steel plate 1104 can be directly welded to the longitudinal reinforcement or the steel bar connector 1103 can be welded to the longitudinal reinforcement, and then the column end connecting steel plate 1104 and the steel bar connector 1103 are welded. This can enhance the strength of the connection and enable the column end connecting steel plate 1104 to better maintain its shape and stability when subjected to stress.

[0052] Furthermore, the cross-section of sawtooth A150 is a right triangle, and the cross-section of sawtooth B140 is an inverted right triangle; the right triangle sawtooth A150 and the inverted right triangle sawtooth B140 can form a close contact surface when biting, reducing the biting gap and improving the stability and reliability of the biting. Example

[0053] The difference from Example 1 is that, in order to facilitate the connection between the prefabricated beam 120 and the steel sleeve 130, as shown in FIG. Figure 7-10 As shown, the connecting member 1201 is a serrated plate symmetrically fixedly arranged at the end of the prefabricated beam 120, and the connected member 1303 is a reverse serrated plate fixedly arranged outside the steel sleeve 130 and adapted to the serrated plate;

[0054] Align the serrated plate on the prefabricated beam 120 with the reverse serrated plate on the steel sleeve 130, and then squeeze the serrated plate and the reverse concave serrations to make an inverted connection until they are fully engaged, thereby completing the connection between the prefabricated beam 120 and the steel sleeve 130.

[0055] It should be noted that the spacing of the upper connection part of the reverse serrated plate on the steel sleeve 130 can pass through the lower end of the serrated plate on the prefabricated beam 120, and the upper connection part of the reverse serrated plate and the serrated plate is a reversely set horizontal serrated plate, and the two are connected by mutual extrusion to achieve an inverted connection, and the lower connection part of the reverse serrated plate and the serrated plate is a reversely set vertical serrated plate, and the two are connected by mutual extrusion to achieve an inverted connection.

[0056] This embodiment provides a zigzag interlocking full-dry connection RC beam-column node and connection method. The node connection method is used to connect the above-mentioned zigzag interlocking full-dry connection RC columns, including the following steps:

[0057] S1. Prefabricate the required prefabricated columns 110, prefabricated beams 120 and steel sleeves 130;

[0058] S2. Align the prefabricated steel sleeve 130 in S1 with the prefabricated column 110 to be installed in the lower layer, and use external force to squeeze the serrations B140 or A150 provided on the corresponding column end connecting steel plate 1104 and the serrations A150 or B140 provided in the lower connecting end 1306 of the steel sleeve to complete the engagement connection between the steel sleeve 130 and the prefabricated column 110 in the lower layer;

[0059] S3, coupling the connecting piece 1201 of the prefabricated beam 120 prefabricated in S1 with the connected piece 1303 provided on the steel sleeve 130 in S2, thereby completing the connection between the prefabricated beam 120 and the steel sleeve 130;

[0060] S4. Align the prefabricated column 110 in S1 that needs to be installed on the upper layer with the steel sleeve 130 in S3, and use external force to extrude the serrations B140 or A150 set on the corresponding column end connecting steel plate 1104 and the serrations A150 or B140 set in the lower connecting end 1306 of the steel sleeve to complete the bite connection between the steel sleeve 130 and the prefabricated column 110 on the upper layer. At the same time, the corrugated steel pipe shear groove 1101 installed under the prefabricated column 110 on the upper layer is coupled with the corrugated steel pipe shear key 1102 installed on the prefabricated column 110 on the lower layer, thereby completing the connection process of the entire node.

[0061] Since the precast columns, precast beams and steel sleeves of this serrated engagement type fully dry-connected RC beam-column node are all prefabricated in the factory, on-site installation only requires simple assembly and connection through the engagement of the corresponding serrations B and A. There is no need to wait for the post-poured concrete to reach sufficient strength before it can withstand the load, which greatly reduces the amount of wet work on site and also meets the environmental protection requirements of energy conservation and carbon reduction. In addition, the ends of the precast columns, precast beams and steel sleeves do not extend out of the steel bars, avoiding complicated steel bar alignment and welding work, making the installation process faster and effectively shortening the construction period.

[0062] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A sawtooth bite type fully dry connection RC beam-column node, comprising a prefabricated column (110), a prefabricated beam (120) and a steel sleeve (130), characterized in that: A perforated transverse partition (1304) is fixedly provided inside the steel sleeve (130) for dividing the interior of the steel sleeve (130) into an upper connecting end (1305) of the steel sleeve and a lower connecting end (1306) of the steel sleeve, wherein the cross-sectional shapes of the upper connecting end (1305) of the steel sleeve and the lower connecting end (1306) of the steel sleeve respectively match the cross-sectional shapes of the two ends of the prefabricated column (110); Column end connecting steel plates (1104) are pre-buried around the exterior of both ends of the prefabricated column (110), a plurality of saw teeth B (140) or a plurality of saw teeth A (150) are fixedly provided on the column end connecting steel plates (1104), and saw teeth A (150) or saw teeth B (140) that match the saw teeth B (140) or saw teeth A (150) on the column end connecting steel plates (1104) are fixedly provided inside the upper connecting end (1305) and the lower connecting end (1306) of the steel sleeve; A connecting piece (1201) is provided at the end of the prefabricated beam (120), and a connected piece (1303) adapted to the connecting piece (1201) is provided on the outside of the steel sleeve (130).

2. The sawtooth bite type fully dry connection RC beam-column node according to claim 1, characterized in that: A corrugated steel pipe shear groove (1101) is provided at one end of the prefabricated column (110), and a corrugated steel pipe shear key (1102) adapted to the corrugated steel pipe shear groove (1101) is fixedly provided at the other end of the prefabricated column (110).

3. The sawtooth bite type fully dry connection RC beam-column node according to claim 2, characterized in that: The perforated transverse diaphragm (1304) is provided with a through hole (13041) for the corrugated steel pipe shear key (1102) to pass through.

4. The sawtooth bite type fully dry connection RC beam-column node according to claim 3, characterized in that: An observation exhaust hole (1302) for observing the connection position of the prefabricated column (110) is provided on the outside of the steel sleeve (130) at a position corresponding to the open diaphragm (1304).

5. The sawtooth bite type fully dry connection RC beam-column node according to claim 1, characterized in that: The connecting member (1201) is an E-shaped connecting keyway symmetrically fixedly arranged at the end of the prefabricated beam (120), and the connected member (1303) is an E-shaped connecting key fixedly arranged outside the steel sleeve (130) and adapted to the E-shaped connecting keyway.

6. The sawtooth bite type fully dry connection RC beam-column node according to claim 1, characterized in that: The connecting member (1201) is a serrated plate member symmetrically fixedly arranged at the end of the prefabricated beam (120), and the connected member (1303) is a reverse serrated plate member fixedly arranged outside the steel sleeve (130) and adapted to the serrated plate member.

7. The sawtooth bite type fully dry connection RC beam-column node according to claim 5 or 6, characterized in that: A plurality of stiffening ribs (1301) are welded between the connected parts (1303) located on two adjacent surfaces of the steel sleeve (130).

8. The sawtooth bite type fully dry connection RC beam-column node according to claim 1, characterized in that: Longitudinal reinforcement or a reinforcement connector (1103) welded to the longitudinal reinforcement is pre-embedded in the prefabricated column (110), and the column end connecting steel plate (1104) is welded to the longitudinal reinforcement or the reinforcement connector (1103) welded to the longitudinal reinforcement.

9. The sawtooth bite type fully dry connection RC beam-column node according to claim 1, characterized in that: The cross section of the saw tooth A (150) is a right triangle, and the cross section of the saw tooth B (140) is an inverted right triangle.

10. A method for connecting RC beam-column joints with a sawtooth-engaging, fully dry connection, characterized in that: The node connection method is used for connecting the zigzag interlocking full-dry connection RC beam-column node according to any one of claims 1 to 7, and the method comprises the following steps: S1, prefabricate the required prefabricated columns (110), prefabricated beams (120) and steel sleeves (130); S2, aligning the prefabricated steel sleeve (130) in S1 with the prefabricated column (110) to be installed on the lower layer, and using external force to squeeze the saw teeth B (140) or saw teeth A (150) provided on the corresponding column end connecting steel plate (1104) and the saw teeth A (150) or saw teeth B (140) provided in the lower connecting end (1306) of the steel sleeve, thereby completing the bite connection between the steel sleeve (130) and the prefabricated column (110) of the lower layer; S3, coupling the connecting piece (1201) of the prefabricated beam (120) prefabricated in S1 with the connected piece (1303) provided on the steel sleeve (130) in S2, thereby completing the connection between the prefabricated beam (120) and the steel sleeve (130); S4. Align the prefabricated column (110) to be installed on the upper layer in S1 with the steel sleeve (130) in S3, and use external force to squeeze the sawtooth B (140) or sawtooth A (150) provided on the corresponding column end connecting steel plate (1104) and the sawtooth A (150) or sawtooth B (140) provided in the lower connecting end (1306) of the steel sleeve to complete the bite connection between the steel sleeve (130) and the prefabricated column (110) on the upper layer. At the same time, the corrugated steel pipe shear groove (1101) installed under the prefabricated column (110) on the upper layer is coupled with the corrugated steel pipe shear key (1102) installed on the prefabricated column (110) on the lower layer, thereby completing the connection process of the entire node.

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