A support-free assembled concrete beam-column connection structure and assembly method

Abstract

The present invention discloses a support-free assembled concrete beam-column connection structure and assembly method, comprising a prefabricated beam, prefabricated columns are respectively arranged on both sides of the prefabricated beam, first connectors are respectively sleeved on the two prefabricated columns, and second connectors are respectively arranged at the two ends of the prefabricated beam facing the prefabricated columns, and the second connectors are overlapped on the first connectors and connected as a whole to form a prefabricated beam-prefabricated column connection structure. By arranging connectors at the connection part of the prefabricated beam and the prefabricated column, and then fixing them with high-strength screws and nuts, the shear force transmission of the connection part between the beam and the column is completed. The bearing capacity of the component is improved, the stress concentration of the node is reduced, the integrity of the structure is further enhanced, and the seismic performance is better. All processes are on-site installation and connection of prefabricated components, and no wet operation is required, which greatly shortens the time required for on-site construction on the construction site, can greatly improve the construction speed, and save costs.

Description

Technical Field

[0001] The invention relates to the field of prefabricated assembled concrete structure buildings, and in particular to a support-free assembled concrete beam-column connection structure and an assembly method. Background Art

[0002] Prefabricated concrete structures have the advantages of fast construction speed, energy saving and environmental protection, and small amount of on-site wet work, and have been rapidly developed in China in recent years. Frame structure is one of the important structural forms of prefabricated concrete structure. In the construction process of connecting prefabricated frame beams with prefabricated frame columns, the original method requires the installation of temporary supports under the prefabricated beams, which consumes manpower and material resources and affects the construction progress. Therefore, the support-free construction of prefabricated beams has become one of the important research issues in the field of civil engineering. The support-free construction of prefabricated beams and prefabricated columns proposed in recent years mainly involves setting corbels on prefabricated columns, and supporting the prefabricated beams through the corbels. The present invention will provide a new type of support-free prefabricated concrete beam-column connection structure and assembly method without corbels, without the need for wet work, and with a structural form different from the above-mentioned structural form, providing more options for the design of prefabricated concrete frame structures. Summary of the invention

[0003] The purpose of the present invention is to provide a support-free assembled concrete beam-column connection structure and an assembly method, which does not require wet work at all while ensuring the connection between various prefabricated concrete components, thereby greatly improving the construction speed and construction quality.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The present invention provides a support-free assembled concrete beam-column connection structure, comprising a precast beam, precast columns are respectively arranged on both sides of the precast beam, first connecting pieces are respectively sleeved on the two precast columns, and second connecting pieces are respectively arranged at the two end portions of the precast beam facing the precast columns, and the second connecting pieces are overlapped and connected to the first connecting piece to form a precast beam-precast column connection structure;

[0006] The first connecting member comprises a rectangular sleeve member, wherein a first upper ring plate and a first lower ring plate are respectively provided at the upper and lower ends of the rectangular sleeve member, wherein first through holes are respectively provided on the first upper ring plate and the first lower ring plate, wherein the outer diameter of the first upper ring plate is smaller than the outer diameter of the first lower ring plate, and the inner diameter of the first upper ring plate is equal to the inner diameter of the first lower ring plate, and a limiting device is provided on the prefabricated column to fix the first connecting member;

[0007] The second connecting member comprises a T-shaped steel plate, and a corbel-shaped connecting steel plate is respectively arranged at the upper and lower ends of the web portion of the T-shaped steel plate, and a second upper ring plate and a second lower ring plate are respectively arranged at the upper and lower ends of the flange portion of the T-shaped steel plate, and second through holes are respectively opened on the second upper ring plate and the second lower ring plate, and the inner diameter of the second upper ring plate is equal to the inner diameter of the first upper ring plate, and the outer diameter of the second upper ring plate is equal to the outer diameter of the first upper ring plate, and the outer diameter of the second upper ring plate is smaller than the inner diameter of the second lower ring plate, so as to facilitate hoisting and overlapping during construction;

[0008] The distances from the first through hole, the second through hole to the outer diameter of the reinforcing ring plate are determined according to relevant specifications.

[0009] The second upper ring plate of the second connecting member is overlapped on the first upper ring plate of the first connecting member, the second lower ring plate of the second connecting member is overlapped on the first lower ring plate of the first connecting member, the first through hole and the second through hole correspond one to one, and a third connecting member is inserted in the first through hole and the second through hole.

[0010] A return flange plate is also provided on the inner side of the first lower ring plate, the outer diameter of the return flange plate is equal to the inner diameter of the second lower ring plate, and the inner diameter of the return flange plate is equal to the inner diameter of the first lower ring plate.

[0011] A first reserved channel is provided at the position where the first connecting member is sleeved on the prefabricated column, and a second reserved channel is correspondingly provided on the wall of the rectangular sleeve member of the first connecting member. The first reserved channel and the second reserved channel correspond one to one, and the limiting device is inserted in the first reserved channel and the second reserved channel.

[0012] The prefabricated column includes a first steel frame, which includes four longitudinal stress-bearing steel bars arranged in a square shape in the prefabricated columns, one end of which is respectively sleeved with a vertical steel sleeve, and prefabricated column stirrups are evenly distributed vertically around the outer periphery of the longitudinal stress-bearing steel bars in the four prefabricated columns arranged in a square shape, and each of the prefabricated column stirrups is provided with prefabricated column tension bars arranged in a well shape.

[0013] A transverse circular steel pipe is arranged inside the first steel bar skeleton below the vertical steel bar sleeve to form the first reserved channel.

[0014] The prefabricated beam comprises a second steel bar skeleton, which comprises four transverse stress-bearing steel bars arranged in a square shape inside the prefabricated beam, and prefabricated beam stirrups are uniformly distributed in the transverse direction around the four transverse stress-bearing steel bars arranged in a square shape inside the prefabricated beam.

[0015] The first through hole and the second through hole are both screw holes, the third connecting member and the limiting device are both screw rods, and the screw rods are high-strength screw rods.

[0016] The length of the screw of the third connecting member is greater than the sum of the thicknesses of the first upper ring plate and the second upper ring plate, and at the same time greater than the sum of the thicknesses of the first lower ring plate and the second lower ring plate, specifically, the sum of the thicknesses of the first upper ring plate and the second upper ring plate plus twice the thickness of the nut and gasket used to fix the screw of the third connecting member.

[0017] The length of the screw of the limiting device is greater than the sum of the thickness of the prefabricated column and the thickness of the barrel wall on both sides of the first connecting member, specifically, the thickness of the prefabricated column plus twice the thickness of the side wall of the first connecting member plus twice the thickness of the nut and gasket used to fix the screw of the limiting device.

[0018] The opposite side and thickness of the nut are determined according to relevant specifications.

[0019] The length of the longitudinal force-bearing steel bars in the prefabricated column located in the vertical steel bar sleeve is half the height of the vertical steel bar sleeve of the prefabricated column.

[0020] The present invention provides an assembly method of a support-free assembled concrete beam-column connection structure, comprising the following specific steps:

[0021] Step S1: Fabrication of prefabricated columns

[0022] S11: Making the first steel frame

[0023] Arrange the longitudinal stress-bearing steel bars in four prefabricated columns in a square shape, insert vertical steel bar sleeves into the upper ends of the longitudinal stress-bearing steel bars in the four prefabricated columns, and evenly distribute prefabricated column stirrups vertically around the peripheries of the longitudinal stress-bearing steel bars in the four prefabricated columns arranged in a square shape, and each of the prefabricated column stirrups is provided with prefabricated column tension bars arranged in a well shape;

[0024] S12: Reserve the first hole

[0025] A transverse circular steel pipe is arranged inside the first steel bar skeleton below the vertical steel bar sleeve to form the first reserved channel;

[0026] S13: Concrete pouring

[0027] A formwork is supported outside the first steel frame, concrete is poured, and the formwork is removed after the concrete solidifies to complete the production of the precast column.

[0028] Step S2: Fabrication of precast beams

[0029] S21: Making the second steel frame

[0030] Arrange the transverse stress-bearing steel bars in four prefabricated beams in a square shape, and uniformly distribute prefabricated beam stirrups in the transverse direction around the transverse stress-bearing steel bars in the four prefabricated beams arranged in a square shape;

[0031] S22: Install the second connecting piece

[0032] Install the second connecting member at both ends of the prefabricated beam, and fix the bracket-type connecting steel plate of the second connecting member to the transverse force-bearing steel bars of the prefabricated beam;

[0033] S23: Concrete pouring

[0034] The formwork is supported outside the second steel bar skeleton, concrete is poured, and the formwork is removed after the concrete solidifies to complete the production of the precast beam.

[0035] Step S3: Assembly of precast columns and precast beams

[0036] S31: Install the first connecting piece

[0037] Two prefabricated columns are arranged at the pre-installation position, the first connecting member is respectively mounted on the two prefabricated columns, and the first connecting member is fixed by the limiting device;

[0038] S32: Hoisting of precast beams

[0039] The precast beam is hoisted above the two precast columns, and the second connecting pieces arranged at both ends of the precast beam are lowered from top to bottom and overlapped on the first connecting pieces of the precast columns. The first connecting piece and the second connecting piece are connected as a whole through the third connecting piece to obtain the final support-free assembled concrete beam-column connection structure.

[0040] The beneficial effects of the support-free assembled concrete beam-column connection structure and assembly method of the present invention are:

[0041] 1. The main process of the present invention does not include on-site grouting or concrete pouring and other processes. All processes are on-site installation and connection of prefabricated components. No wet work is required, which greatly shortens the time required for on-site construction, can greatly improve the construction speed and save costs.

[0042] 2. The structure of the present invention completes the shear force transmission of the connection part between the beam and the column by setting a connector at the connection part between the prefabricated beam and the prefabricated column, and then fixing it with high-strength screws and nuts. At the same time, the support of the upper and lower circular reinforcement rings improves the bearing capacity of the components and the force transmission of the corbel-shaped steel plate, reduces the stress concentration of the node, further enhances the integrity of the structure, and has better seismic performance.

[0043] 3. The parts of the present invention that require high precision, including prefabricated columns, prefabricated beams, first connectors, second connectors, third connectors and limit devices, are all completed in the factory. The difficulty of on-site assembly is not high, which can save the learning cost of construction workers and greatly improve construction efficiency.

[0044] 4. The force transmission between the components of the present invention relies on the welding of the connecting parts and the main reinforcement and the fixation of the high-strength screws. The support of the upper and lower reinforcing rings on the connecting parts makes the structural force transmission more stable and more reliable than the structure that relies solely on weld force transmission.

[0045] 5. The present invention uses a large number of assembly operations, which greatly reduces the original cast-in-place operations, and meets the advantages of assembled concrete structures such as energy conservation, environmental protection, economical and safe green building development requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a structural schematic diagram of a first connecting member;

[0047] Figure 2 It is a structural schematic diagram of the limiting device;

[0048] Figure 3 is a schematic structural diagram of a second connecting member;

[0049] Figure 4 is a schematic structural diagram of a third connecting member;

[0050] Figure 5 The structural diagram of the first steel bar skeleton is;

[0051] Figure 6 A schematic diagram of the structure of a first steel bar skeleton for setting a first reserved hole;

[0052] Figure 7 It is a structural schematic diagram of a prefabricated column;

[0053] Figure 8 It is a schematic diagram of the assembly process of the prefabricated column and the first connecting member;

[0054] Fig. 9 It is a schematic diagram of the assembled structure of the prefabricated column and the first connecting member;

[0055] Fig.10 is a schematic structural diagram of a second steel reinforcement skeleton;

[0056] Fig.11 A schematic diagram of the structure of a second steel reinforcement frame for installing a second connecting member;

[0057] Fig.12 This is a structural diagram of a precast beam;

[0058] Fig.13 This is a schematic diagram of the assembly process of precast beams and precast columns;

[0059] Fig.14 This is a schematic diagram of the assembled structure of precast beams and precast columns.

[0060] In the figure: 1-vertical steel sleeve, 2-rectangular sleeve member, 3-first upper ring plate, 4-first lower ring plate, 5-return flange plate, 6-rectangular sleeve member wall, 7-first through hole, 8-second, 9-first screw, 10-steel gasket, 11-nut, 12-second connecting member, 13-second upper ring plate, 14-second lower ring plate, 15-upper bracket type connecting steel plate, 16-lower bracket type connecting steel plate, 17-T-shaped steel plate, 18-second screw, 19-longitudinal force-bearing steel bars in precast column, 20-precast column stirrups, 21- precast column reinforcement, 22- first reserved channel, 23- precast column, 24- transverse force-bearing steel bars in precast beam, 25- precast beam stirrups, 26- precast beam, 27- second through hole, 28- first steel bar skeleton, 29- second steel bar skeleton, 30- limiting device, 31- first connecting piece, 32- third connecting piece. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0062] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0063] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0064] like Figure 1-Figure 14As shown, the present invention provides a support-free assembled concrete beam-column connection structure, including a precast beam 26, precast columns 23 are respectively arranged on both sides of the precast beam 26, and first connecting members 31 are respectively sleeved on the two precast columns 23, and second connecting members 12 are respectively arranged at the end portions of the precast beam 26 facing the precast columns 23, and the second connecting members 12 are overlapped on the first connecting member 31 to form a precast beam-precast column connection structure.

[0065] The beams and columns of the structure of the present invention are overlapped by a circular reinforcing ring steel plate. The structure includes a precast column 23, a precast beam 26, a first, a second and a third connecting member 32. The precast beam 26 is located between two precast columns 23. By hoisting the precast beam 26, the second connecting member 12 is made to fall from the top to overlap with the first connecting member 31 on the precast column 23, and is fixed by the third connecting member 32. The structure of the present invention completes the transmission of shear force and bending moment of the beam-column connection part by arranging the first connecting member 31 on the precast column 23 and the second connecting member 12 on the precast beam 26, and is combined by overlapping connecting members, so as to further enhance the integrity of the structure and improve the seismic performance. There is no need to overlap the truss support of the precast beam 26 on site, and no on-site grouting or concrete pouring and other processes are included. All processes are on-site installation and connection of precast components, and no wet work is required, which greatly shortens the time required for on-site construction on the construction site and can greatly improve the construction speed.

[0066] The first connecting member 31 includes a rectangular sleeve member 2, and the upper and lower ends of the rectangular sleeve member 2 are respectively provided with a first upper ring plate 3 and a first lower ring plate 4, and the first upper ring plate 3 and the first lower ring plate 4 are both rectangular members, and the first upper ring plate 3 and the first lower ring plate 4 are respectively provided with first through holes 7. Specifically, four first through holes are respectively provided on the first upper ring plate 3 and the first lower ring plate 4, and are distributed at the four corners of the first upper ring plate 3 and the first lower ring plate 4. The outer diameter of the first upper ring plate 3 is smaller than the outer diameter of the first lower ring plate 4, and the inner diameter of the first upper ring plate 3 is equal to the inner diameter of the first lower ring plate 4. A limiting device 30 is provided on the prefabricated column 23 to fix the first connecting member 31.

[0067] The second connecting member 12 includes a T-shaped steel plate 17, and an upper corbel-type connecting steel plate 15 and a lower corbel-type connecting steel plate 16 are respectively arranged at the upper and lower ends of the web portion of the T-shaped steel plate 17, and a second upper ring plate 13 and a second lower ring plate 14 are respectively arranged at the upper and lower ends of the flange portion of the T-shaped steel plate 17, and the second upper ring plate 13 and the second lower ring plate 14 are both rectangular members, and the second upper ring plate 13 and the second lower ring plate 14 are respectively provided with second through holes 27, specifically, four are respectively arranged on the second upper ring plate 13 and the second lower ring plate 14, and are distributed at the four corners of the second upper ring plate 13 and the second lower ring plate 14, the inner diameter of the second upper ring plate 13 is equal to the inner diameter of the first upper ring plate 3, the outer diameter of the second upper ring plate 13 is equal to the outer diameter of the first upper ring plate 3, and the outer diameter of the second upper ring plate 13 is smaller than the inner diameter of the second lower ring plate 14, so that the second lower ring plate 14 can be effectively overlapped on the first lower ring plate 4.

[0068] The second upper ring plate 13 of the second connecting member 12 is overlapped on the first upper ring plate 3 of the first connecting member 31, the second lower ring plate 14 of the second connecting member 12 is overlapped on the first lower ring plate 4 of the first connecting member 31, the first through hole 7 and the second through hole 27 correspond one to one, and the third connecting member 32 is inserted in the first through hole 7 and the second through hole 27.

[0069] Furthermore, in the present embodiment, a return flange plate 5 is also provided on the inner side of the first lower ring plate 4, the outer diameter of the return flange plate 5 is equal to the inner diameter of the second lower ring plate 14, and the inner diameter of the return flange plate 5 is equal to the inner diameter of the first lower ring plate 4. During installation, the second lower ring plate 14 of the second connecting member 12 is overlapped on the first lower ring plate 4 of the first connecting member 31, and the inner edge of the second lower ring plate 14 is in contact with the return flange plate 5. The second lower ring plate 14 is limited by the return flange plate 5 to enhance the stability of the overall structure.

[0070] Furthermore, in this embodiment, the bracket-type connecting steel plates respectively arranged at the upper and lower ends of the web portion of the T-shaped steel plate 17 can not only enhance the stability of the second connecting member but also reduce the stress concentration at the connection with the reinforcing ring plate. At the same time, when the integral bracket-type connecting steel plate is installed and used, it is fixed to the transverse force-bearing steel bars 24 in the prefabricated beam to complete the transmission of part of the internal force between the column and the beam, thereby achieving the purpose of strengthening the node.

[0071] Further, in this embodiment, a first reserved channel 22 is provided at the position where the first connecting member 31 is sleeved on the prefabricated column 23, and a second reserved channel 8 is correspondingly provided on the rectangular sleeve member wall 6 of the first connecting member 31. The first reserved channel 22 and the second reserved channel 8 correspond to each other. Specifically, four second reserved channels 8 are provided on each side of the rectangular sleeve member 2, which are arranged in parallel in pairs and distributed in a rectangular shape. The first reserved channel 22 and the second reserved channel 8 are inserted with the limiting device 30. Specifically, the limiting device 30 is a high-strength screw, and the screw length of the limiting device 30 is greater than the sum of the thickness of the prefabricated column 23 and the thickness of the cylinder wall on both sides of the rectangular sleeve 2. During actual installation, the limiting device 30 includes a first screw 9, a nut 11 connected at both ends of the first screw 9, and a steel gasket 10. The first screw 9 is respectively inserted into the first reserved channel 22 and the second reserved channel 8 corresponding to the prefabricated column 23 and the rectangular sleeve 2, and the steel gaskets 10 are respectively sleeved on both ends of the first screw 9, and then the nut 11 is screwed on.

[0072] Furthermore, in the present embodiment, the prefabricated column 23 comprises a first steel bar skeleton 28, the first steel bar skeleton 28 comprises four prefabricated column inner longitudinal stress-bearing steel bars 19 arranged in a square shape, one end of each of the four prefabricated column inner longitudinal stress-bearing steel bars 19 is respectively sleeved with a vertical steel bar sleeve 1, specifically, the length of the prefabricated column inner longitudinal stress-bearing steel bars 19 located in the vertical steel bar sleeve 1 is half of the height of the prefabricated column vertical steel bar sleeve 1, prefabricated column stirrups 20 are evenly distributed vertically around the outer periphery of the four prefabricated column inner longitudinal stress-bearing steel bars 19 arranged in a square shape, each of the prefabricated column stirrups 20 is provided with a prefabricated column tension bar 21 arranged in a well shape, and because the prefabricated column 23 is subjected to the largest bending moment at both ends, in order to more fully meet the stress requirements, stirrups are used to increase the density at both ends of the prefabricated column 23, that is, it can be clearly seen from the accompanying drawings that the density of the prefabricated column stirrups 20 distributed at both ends of the prefabricated column 23 structure is higher than that of the prefabricated column 23. The density in the middle part is high. Specifically, a transverse circular steel pipe is arranged inside the first steel bar skeleton 28 below the vertical steel bar sleeve 1 to form the first reserved channel 22 .

[0073] Further, in this embodiment, the prefabricated beam 26 includes a second steel bar skeleton 29, and the second steel bar skeleton 29 includes four prefabricated beam inner transverse force-bearing steel bars 24 arranged in a square shape, and the outer periphery of the four prefabricated beam inner transverse force-bearing steel bars 24 arranged in a square shape is uniformly distributed with prefabricated beam stirrups 25 along the transverse direction. Specifically, the first through hole 7 The third connecting member 32 is a high-strength screw, and the screw length of the third connecting member 32 is greater than the sum of the thicknesses of the first upper ring plate 3 and the second upper ring plate 13, and greater than the sum of the thicknesses of the first lower ring plate 4 and the second lower ring plate 14. During actual installation, the third connecting member 32 includes a second screw 18, a nut 11 connected at both ends of the second screw 18, and a steel gasket 10. The second screw 18 is respectively inserted into the first through hole 7 and the second through hole 27 corresponding to the first upper ring plate 3 and the second upper ring plate 13, the first lower ring plate 4 and the second lower ring plate 14. The steel washers 10 are respectively sleeved on both ends of the second screw 18, and then the nut 11 is screwed on.

[0074] The present invention provides a method for assembling a support-free assembled concrete beam-column connection structure, comprising the following specific steps:

[0075] Step S1: Fabrication of prefabricated columns

[0076] S11: Making the first steel frame

[0077] Arrange the longitudinal stress-bearing steel bars 19 in four prefabricated columns in a square shape, insert the vertical steel bar sleeve 1 into the upper ends of the longitudinal stress-bearing steel bars 19 in the four prefabricated columns, and evenly distribute prefabricated column stirrups 20 vertically around the periphery of the longitudinal stress-bearing steel bars 19 in the four prefabricated columns arranged in a square shape, and each of the prefabricated column stirrups 20 is provided with a prefabricated column tie bar 21 arranged in a well shape;

[0078] S12: Reserve the first hole

[0079] A transverse circular steel pipe is arranged inside the first steel bar skeleton 28 below the vertical steel bar sleeve 1 to form the first reserved channel 22;

[0080] S13: Concrete pouring

[0081] A formwork is supported outside the first steel frame 28 , concrete is poured, and the formwork is removed after the concrete solidifies, thereby completing the production of the prefabricated column 23 .

[0082] Step S2: Fabrication of precast beams

[0083] S21: Making the second steel frame

[0084] Arrange the transverse stress-bearing steel bars 24 in four precast beams in a square shape, and uniformly distribute precast beam stirrups 25 in the transverse direction around the transverse stress-bearing steel bars 24 in the four precast beams arranged in a square shape;

[0085] S22: Install the second connecting piece

[0086] Install the second connecting member 12 at both ends of the precast beam 26, and fix the bracket-type connecting steel plate of the second connecting member 12 to the transverse force-bearing steel bars 24 of the precast beam;

[0087] S23: Concrete pouring

[0088] A formwork is supported outside the second steel bar skeleton 29 , concrete is poured, and the formwork is removed after the concrete solidifies, thereby completing the manufacture of the precast beam 26 .

[0089] Step S3: Assembly of precast columns and precast beams

[0090] S31: Install the first connecting piece

[0091] Two prefabricated columns 23 are arranged at the pre-installation position, the first connecting members 31 are respectively mounted on the two prefabricated columns 23, and the first connecting members 31 are fixed by the limiting device 30;

[0092] S32: Hoisting of precast beams

[0093] The precast beam 26 is hoisted above the two precast columns 23, and the second connecting members 12 provided at both ends of the precast beam 26 are lowered from top to bottom and overlapped on the first connecting members 31 of the precast columns 23. The first connecting member 31 and the second connecting member 12 are connected as a whole through the third connecting member 32 to obtain the final support-free assembled concrete beam-column connection structure.

[0094] The force transmission mechanism of the above structure is as follows: the shear force generated at the beam end by the deadweight of the precast beam 26 is transmitted to the first connecting member 31 through the second connecting member 12, and the first connecting member 31 finally transmits the force received to the precast column 23 through the third connecting member 32; the tensile stress generated by the bending moment at the beam end of the precast beam 26 is transmitted to the first connecting member 31 through the upper corbel-type connecting steel plate 15 and the second upper ring plate 13, and the first connecting member 31 transmits the force received to the precast column 23; the compressive stress generated by the bending moment is transmitted to the first connecting member 31 through the lower corbel-type connecting steel plate 16 and the second lower ring plate 14 at the beam end, and the first connecting member 31 transmits the force received to the precast column 23.

[0095] The implementation results show that the main process of the present invention does not include on-site grouting or concrete pouring and other processes. All processes are on-site installation and connection of prefabricated components, and no wet work is required, which greatly shortens the time required for on-site construction on the construction site. When the prefabricated beam 26 is hoisted, it is directly overlapped on the prefabricated column 23, and there is no need to overlap the support formwork on site, which greatly improves the construction speed and saves costs. Prefabricated columns 23 and prefabricated beams 26 are provided with connectors at the connecting parts of prefabricated beams 26 and prefabricated columns 23 to complete the transmission of shear force between the beam-column connecting part, further enhance the integrity of the structure, and have better seismic performance. The parts with high production precision requirements, including the production of prefabricated columns 23, prefabricated beams 26, and connectors, are all completed in the factory. The difficulty of on-site assembly is not high, which can save the learning cost of construction personnel and greatly improve construction efficiency. The force transmission between the components of the present invention relies on the welding of the connectors and the friction force of the screw, making the structure more reliable. It uses a large number of assembly operations, which greatly reduces the original cast-in-place operations. It meets the advantages of prefabricated concrete structures such as energy conservation, environmental protection, economic safety and green building development requirements, and has good engineering application prospects.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be included in the scope of the present claims.

Claims

1. A support-free assembled concrete beam-column connection structure, characterized in that: include: Precast beams, precast columns are respectively arranged on both sides of the precast beams, first connectors are respectively sleeved on the two precast columns, second connectors are respectively arranged on both ends of the precast beams facing the precast columns, and the second connectors are overlapped and connected to the first connectors to form a precast beam-precast column connection structure; The first connecting member comprises a rectangular sleeve member, wherein a first upper ring plate and a first lower ring plate are respectively provided at the upper and lower ends of the rectangular sleeve member, wherein first through holes are respectively provided on the first upper ring plate and the first lower ring plate, wherein the outer diameter of the first upper ring plate is smaller than the outer diameter of the first lower ring plate, and the inner diameter of the first upper ring plate is equal to the inner diameter of the first lower ring plate, and a limiting device is provided on the prefabricated column to fix the first connecting member; The second connecting member comprises a T-shaped steel plate, wherein the upper and lower ends of the web portion of the T-shaped steel plate are respectively provided with a corbel-shaped connecting steel plate, the upper and lower ends of the flange portion of the T-shaped steel plate are respectively provided with a second upper ring plate and a second lower ring plate, wherein the second upper ring plate and the second lower ring plate are respectively provided with a second through hole, wherein the inner diameter of the second upper ring plate is equal to the inner diameter of the first upper ring plate, the outer diameter of the second upper ring plate is equal to the outer diameter of the first upper ring plate, and the outer diameter of the second upper ring plate is smaller than the inner diameter of the second lower ring plate; The second upper ring plate of the second connecting member is overlapped on the first upper ring plate of the first connecting member, the second lower ring plate of the second connecting member is overlapped on the first lower ring plate of the first connecting member, the first through hole and the second through hole correspond to each other one by one, and a third connecting member is inserted into the first through hole and the second through hole; A return flange plate is also provided on the inner side of the first lower ring plate, the outer diameter of the return flange plate is equal to the inner diameter of the second lower ring plate, and the inner diameter of the return flange plate is equal to the inner diameter of the first lower ring plate; A first reserved hole is provided at the position where the first connecting member is sleeved on the prefabricated column, and a second reserved hole is correspondingly provided on the wall of the rectangular sleeve of the first connecting member, the first reserved hole and the second reserved hole correspond one to one, and the limiting device is inserted in the first reserved hole and the second reserved hole; The prefabricated column comprises a first steel bar skeleton, the first steel bar skeleton comprises four prefabricated column inner longitudinal stress-bearing steel bars arranged in a square shape, one end of the four prefabricated column inner longitudinal stress-bearing steel bars are respectively sleeved with vertical steel bar sleeves, prefabricated column stirrups are evenly distributed vertically around the outer periphery of the four prefabricated column inner longitudinal stress-bearing steel bars arranged in a square shape, and each of the prefabricated column stirrups is provided with prefabricated column tension bars arranged in a well shape; A transverse circular steel pipe is arranged inside the first steel bar skeleton below the vertical steel bar sleeve to form the first reserved channel; The prefabricated beam comprises a second steel bar skeleton, wherein the second steel bar skeleton comprises four prefabricated beam inner transverse force-bearing steel bars arranged in a square shape, and prefabricated beam stirrups are uniformly distributed in the transverse direction around the four prefabricated beam inner transverse force-bearing steel bars arranged in a square shape; The first through hole and the second through hole are both screw holes, and the third connecting member and the limiting device are both high-strength screws; The length of the screw of the third connecting member is greater than the sum of the thickness of the first upper ring plate and the second upper ring plate, and greater than the sum of the thickness of the first lower ring plate and the second lower ring plate, and the length of the screw of the limiting device is greater than the sum of the thickness of the prefabricated column and the thickness of the cylinder wall on both sides of the first connecting member; The length of the longitudinal force-bearing steel bars in the prefabricated column located in the vertical steel bar sleeve is half the height of the vertical steel bar sleeve of the prefabricated column.

2. The method for assembling a support-free assembled concrete beam-column connection structure according to claim 1, characterized in that: The following specific steps are included: Step S1: Fabrication of prefabricated columns S11: Making the first steel frame Arrange the longitudinal stress-bearing steel bars in four prefabricated columns in a square shape, insert vertical steel bar sleeves into the upper ends of the longitudinal stress-bearing steel bars in the four prefabricated columns, and evenly distribute prefabricated column stirrups vertically around the peripheries of the longitudinal stress-bearing steel bars in the four prefabricated columns arranged in a square shape, and each of the prefabricated column stirrups is provided with prefabricated column tension bars arranged in a well shape; S12: Reserve the first hole A transverse circular steel pipe is arranged inside the first steel bar skeleton below the vertical steel bar sleeve to form the first reserved channel; S13: Concrete pouring Supporting the formwork outside the first steel frame, pouring concrete, and removing the formwork after the concrete solidifies to complete the production of the precast column; Step S2: Fabrication of precast beams S21: Making the second steel frame Arrange the transverse stress-bearing steel bars in four prefabricated beams in a square shape, and uniformly distribute prefabricated beam stirrups in the transverse direction around the transverse stress-bearing steel bars in the four prefabricated beams arranged in a square shape; S22: Install the second connecting piece Install the second connecting member at both ends of the prefabricated beam, and fix the bracket-type connecting steel plate of the second connecting member to the transverse force-bearing steel bars of the prefabricated beam; S23: Pouring concrete Supporting the formwork outside the second steel reinforcement skeleton, pouring concrete, and removing the formwork after the concrete solidifies to complete the production of the precast beam; Step S3: Assembly of precast columns and precast beams S31: Install the first connecting piece Two prefabricated columns are arranged at the pre-installation position, the first connecting member is respectively mounted on the two prefabricated columns, and the first connecting member is fixed by the limiting device; S32: Hoisting precast beams The precast beam is hoisted above the two precast columns, and the second connecting pieces arranged at both ends of the precast beam are lowered from top to bottom and overlapped on the first connecting pieces of the precast columns. The first connecting piece and the second connecting piece are connected as a whole through the third connecting piece to obtain the final support-free assembled concrete beam-column connection structure.

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