A precast reinforced concrete beam-column connection structure

Abstract

The present invention discloses a prefabricated reinforced concrete beam-column connection structure, which specifically relates to the field of concrete building construction, including prefabricated reinforced concrete beams, prefabricated reinforced concrete upper columns and prefabricated reinforced concrete lower columns, wherein a detachable lower shaping mold is provided between the top of the prefabricated reinforced concrete lower column and the prefabricated reinforced concrete beam, and a detachable upper shaping mold is provided between the bottom of the prefabricated reinforced concrete upper column and the prefabricated reinforced concrete beam. The present invention uses a shaping mold to prepare and cast a connection method for a connecting column on site, and forms a non-standard flat contact surface structure and then casts the contact surface to form an occlusal contact, which greatly improves the surface stress and transverse shear force. The on-site wet connection only needs to prepare and cast the connecting column by a shaping mold, which can ensure that it is suitable for occasions requiring rapid construction, ensure the construction speed, and at the same time ensure the connection strength, transverse shear force and other stress requirements at the interface of the connector.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete building structures, and more specifically, the present invention relates to a precast reinforced concrete beam-column connection structure. Background Art

[0002] Precast concrete is a commonly used building material with the characteristics of high strength and modularity. In the construction of prefabricated buildings, the beam-column connection technology is one of the key links. With the acceleration of the urbanization process and the continuous improvement of people's requirements for building quality, the traditional on-site casting method gradually fails to meet the needs. The adoption of precast concrete structures can improve the building quality, shorten the construction period, and cause less environmental pollution, and an important link among them is the beam-column connection technology.

[0003] In the prior art, the main connection methods of precast reinforced concrete beam-columns include two types: wet connection and dry connection. The wet connection is to connect precast components together by cast-in-place concrete to form an integral structure;

[0004] The dry connection connects precast components together through mechanical connectors (such as sleeves, bolts, etc.) without the need to pour concrete. Among them, the main disadvantages of the wet connection method are the long cycle and the weak joint strength at the joint, while although the dry connection has a fast construction speed, the corrosion of metal parts, the oxidation of bonding materials, and the weak stress surface bearing strength and other situations may all have a certain impact on the structural integrity. Summary of the Invention

[0005] In order to overcome the above defects of the prior art, an embodiment of the present invention provides a precast reinforced concrete beam-column connection structure. The technical problem to be solved by the present invention is: how to effectively improve the corresponding disadvantages of the wet and dry connection methods in the existing precast reinforced concrete beam-column connection technology and provide a precast reinforced concrete beam-column connection solution superior to the prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: A precast reinforced concrete beam-column connection structure includes a precast reinforced concrete beam, a precast reinforced concrete upper column, and a precast reinforced concrete lower column. A detachable lower shaping mold is provided between the top end of the precast reinforced concrete lower column and the precast reinforced concrete beam, and a detachable upper shaping mold is provided between the bottom end of the precast reinforced concrete upper column and the precast reinforced concrete beam;

[0007] Both the precast reinforced concrete upper column and the precast reinforced concrete lower column include a main column body. A precast end column is fixedly provided at the connection end of the main column body and the precast reinforced concrete beam. A shaping arc surface is provided at the edge of the precast end column. A settlement groove is opened at the top end of the precast end column. A wedge-shaped guiding groove is longitudinally opened at the center of the bottom edges of the four sides of the precast end column, and the guiding groove is communicated with the settlement groove;

[0008] The precast reinforced concrete beam includes a main beam body. A connection platform is fixedly provided at the cross intersection of two groups of main beam bodies. Coordination grooves are provided at both the top and bottom ends of the connection platform, and a pouring channel longitudinally penetrating the connection platform is also opened at the center of the coordination groove, which is used for pouring wet connection at the joint between the top end of the precast reinforced concrete lower column and the precast reinforced concrete beam. Through the pouring of the pouring channel, a pouring carrier column is formed on the connection platform in the lower shaping mold.

[0009] The precast carrier column corresponding to the precast reinforced concrete upper column is formed by pouring in the upper shaping mold. Dry connection external fittings are installed on the outer sides of the corresponding pouring carrier columns of the precast reinforced concrete upper column and the precast reinforced concrete lower column.

[0010] In a preferred embodiment, the precast end column is integrally cast and preformed with the main column body, and the precast end column is set in a trapezoidal shape with a narrower top and a wider bottom.

[0011] The settlement groove is set in a cross shape. The top end of the precast end column is divided into four independent upper platforms by the settlement groove, and the guiding groove and the settlement groove divide the center of the precast end column into a center platform with a height lower than that of the upper platform.

[0012] Reinforcing steel column bars are arranged on the upper platform during precasting, and a steel bar framework is arranged on the center platform during precasting.

[0013] In a preferred embodiment, both the upper shaping mold and the lower shaping mold include a mold cylinder shell Ⅰ and a mold cylinder shell Ⅱ. The mold cylinder shell Ⅰ and the mold cylinder shell Ⅱ jointly form a cylindrical mold. Flanging grooves are opened at the upper and lower edges of the inner cavities of the mold cylinder shell Ⅰ and the mold cylinder shell Ⅱ, and the diameter of the flanging groove is larger than the diameter of the inner cavity of the cylindrical mold.

[0014] A hanging ear frame Ⅰ is fixedly provided on the outer wall of the edge of the mold cylinder shell Ⅰ, and a hanging ear frame Ⅱ is fixedly provided on the outer wall of the edge of the mold cylinder shell Ⅱ. Card slotting grooves are opened on both the hanging ear frame Ⅰ and the hanging ear frame Ⅱ, and a clamping assembly is rotatably provided at the position of the card slotting groove at the alignment position of the hanging ear frame Ⅱ.

[0015] In a preferred embodiment, a pouring hopper is further fixedly provided at the top end of the mold cylinder shell Ⅱ corresponding to the upper shaping mold, and the pouring hopper is communicated with the inner cavity of the cylindrical mold.

[0016] The clamping assembly includes a hand-held button head and a main connecting rod. A clamping gasket is provided at the connection between the hand-held button head and the main connecting rod, and the clamping gasket is set in a circular ring shape.

[0017] A steering pin is fixedly provided on the outer wall of one end of the main connecting rod, and a threaded column head is fixedly provided at the other end of the main connecting rod. The main connecting rod is rotatably connected with the card slotting groove through the steering pin. The inner diameter of the clamping gasket is larger than the outer diameter of the threaded column head and smaller than the outer diameter of the main connecting rod.

[0018] An adjustment hole is provided at the center of the handheld button head, and the handheld button head is threadedly connected to the threaded column head through the adjustment hole.

[0019] In a preferred embodiment, the distance between the two shaped arc surfaces corresponding to the precast end column is equivalent to the inner cavity size of the cylindrical mold; an assembly hole is provided at the position where the coordination groove is aligned with the reinforcing steel column, and the inner diameter of the coordination groove is greater than the outer diameter of the upper shaping mold / lower shaping mold.

[0020] In a preferred embodiment, the dry connection external fitting includes an outer peripheral plate and an expansion bolt;

[0021] The contact surface between adjacent outer peripheral plates is set as an inclined surface of 45°, and mounting holes equivalent to the expansion bolts are provided on the outer peripheral plate.

[0022] In a preferred embodiment, the thickness and height of the outer peripheral plate are both set to the same size, the height of the outer peripheral plate is equal to the height of the casting connection column, and the length of the outer peripheral plate is the same as the size of the alignment installation edge of the main column body;

[0023] An anti-rust coating equivalent to the color of the main column body is sprayed on the outer surface of the outer peripheral plate.

[0024] The technical effects and advantages of the present invention:

[0025] 1. Through the connection method of preparing the casting connection column on-site by the shaping mold, with a non-standard structure of flush contact surfaces, when the subsequent precast reinforced concrete upper column, precast reinforced concrete lower column and precast reinforced concrete beam are connected for casting, a bite contact is formed on the re-cast contact surface, resulting in a significant improvement in both surface stress and transverse shear force. Moreover, steel bars are additionally provided at the connection surface, and by directly extending the longitudinal steel bars into the connection surface area for anchoring, and through casting concrete, the precast components are connected into a whole, further ensuring the overall connection and anchoring performance of the contact surface between the cast-in-place casting connection column and the precast end column. Each component is prefabricated, and on-site wet connection only requires preparing the casting connection column by the shaping mold, which can ensure its applicability to occasions requiring rapid construction, guarantee the construction speed, and at the same time ensure the stress requirements such as the connection strength and transverse shear force at the interface of the connecting piece;

[0026] 2. By adding dry connection external fittings outside the casting connection column, the outer peripheral plates form a frame-shaped dry connection external fitting through the inclined contact surfaces, and the dry connection external fitting is fixed to the casting connection column along the mounting holes by using expansion bolts, making the overall appearance of the completed beam-column connection unified. By using the method of dry connection between the dry connection external fitting and reinforced concrete in cooperation with the wet connection cast on-site by the shaping mold, compared with wet connection casting, it can reduce the amount of concrete used, guarantee the shortening of the construction period, and ensure the connection strength and seismic performance at the connection by using the shaping mold for casting the casting connection column, effectively solving the relative drawbacks in the traditional process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the decomposed structure of the assembled state of the present invention.

[0028] Figure 2 It is a schematic diagram of the assembled and formed structure of the present invention.

[0029] Figure 3 It is a schematic diagram of the pouring connection structure of the pouring load-bearing column of the present invention.

[0030] Figure 4 It is a schematic diagram of the assembled structure of the dry connection external fitting of the present invention.

[0031] Figure 5 It is a schematic diagram of the precast reinforced concrete beam structure of the present invention.

[0032] Figure 6 It is a schematic diagram of the precast reinforced concrete lower column structure of the present invention.

[0033] Figure 7 It is a schematic diagram of the disassembled and assembled structure of the dry connection external fitting of the present invention.

[0034] Figure 8 It is a schematic diagram of the lower sizing die structure of the present invention.

[0035] Figure 9 It is a schematic diagram of the upper sizing die structure of the present invention.

[0036] Figure 10 It is a schematic diagram of the disassembled and exploded structure of the clamping assembly of the present invention.

[0037] Reference numerals are: 10 precast reinforced concrete beam, 20 precast reinforced concrete upper column, 30 precast reinforced concrete lower column, 40 upper sizing die, 50 lower sizing die;

[0038] 101 main beam body, 102 connection platform, 103 coordination groove, 104 assembly hole, 105 pouring channel;

[0039] 301 main column body, 302 precast end column, 303 sizing arc surface, 304 settlement groove, 305 guide groove, 306 steel bar cage, 307 reinforcing steel column;

[0040] 01 pouring load-bearing column, 02 dry connection external fitting;

[0041] 021 peripheral plate, 022 expansion bolt;

[0042] 501 die barrel shell I, 502 die barrel shell II, 503 folding edge groove, 504 hanging ear frame I, 505 clamping groove, 506 hanging ear frame II, 507 clamping assembly, 508 pouring hopper;

[0043] 5071 Handheld button head, 5072 Main connecting rod, 5073 Clamping gasket, 5074 Steering pin, 5075 Threaded stud, 5076 Adjusting hole. Detailed implementation manner

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0045] Embodiment 1:

[0046] Please refer to the attached Figure 1-2 , the present invention provides a precast reinforced concrete beam-column connection structure, including a precast reinforced concrete beam 10, a precast reinforced concrete upper column 20, and a precast reinforced concrete lower column 30. A detachable lower shaping mold 50 is provided between the top end of the precast reinforced concrete lower column 30 and the precast reinforced concrete beam 10, and a detachable upper shaping mold 40 is provided between the bottom end of the precast reinforced concrete upper column 20 and the precast reinforced concrete beam 10;

[0047] Please refer to the attached Figure 6 As shown, both the precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30 include a main column body 301. A precast end column 302 is fixedly provided at the connection end of the main column body 301 and the precast reinforced concrete beam 10. A shaping arc surface 303 is provided at the edge of the precast end column 302. A settlement groove 304 is opened at the top end of the precast end column 302. A wedge-shaped guide groove 305 is longitudinally opened at the center of the four bottom edges of the precast end column 302, and the guide groove 305 is communicated with the settlement groove 304; The precast end column 302 and the main column body 301 are integrally cast and preformed, and the precast end column 302 is set as a trapezoidal shape with a narrow top and a wide bottom; The settlement groove 304 is set in a cross shape. The top end of the precast end column 302 is divided into four groups of independent upper platforms by the settlement groove 304, and the guide groove 305 and the settlement groove 304 divide the center of the precast end column 302 into a center platform with a height lower than the upper platform; Reinforcing steel columns 307 are arranged on the upper platform during precast, and a steel bar framework 306 is arranged on the center platform during precast. The precast end column 302 corresponding to the precast reinforced concrete upper column 20 is formed into a casting and receiving column 01 by pouring with the upper shaping mold 40;

[0048] Specifically, when prefabricating the precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30, in addition to the conventional formwork molds, molds adapted to the shape of the precast end column 302 are added at the ends, so that the precast reinforced concrete upper column 20 or the precast reinforced concrete lower column 30 generates an integral precast reinforced concrete column when precast and poured using concrete and steel bars. Moreover, the settlement groove 304 and the guiding groove 305 on the precast end column 302 provided at the port of the precast reinforced concrete column form a connected gully-shaped groove. With the structure of a non-standard flush contact surface, when the subsequent precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30 are connected to the precast reinforced concrete beam 10 for pouring, a "biting" contact is formed at the re-pouring contact surface, which has a greater degree of improvement in surface stress and transverse shear force compared with the plane contact method. Additionally, a reinforcing steel column 307 is added at the connection surface and a steel bar framework 306 is arranged on the central table surface. By directly extending the longitudinal steel bars into the connection surface area for anchoring and pouring concrete, the precast components are connected into a whole, further ensuring the anchoring performance of the overall connection between the cast-in-place column 01 and the contact surface of the precast end column 302;

[0049] Please refer to the appendix Figure 5 As shown, the precast reinforced concrete beam 10 includes a main beam body 101. A connection platform 102 is fixedly provided at the cross intersection of the two groups of main beam bodies 101. Coordination grooves 103 are provided at the top and bottom ends of the connection platform 102, and a pouring channel 105 longitudinally penetrating the connection platform 102 is also opened at the center of the coordination groove 103, which is used for wet connection pouring at the connection between the top end of the precast reinforced concrete lower column 30 and the precast reinforced concrete beam 10. Through the pouring of the pouring channel 105, the connection platform 102 in the lower shaping mold 50 generates a cast-in-place column 01;

[0050] Please refer to the appendix Figure 8 As shown, both the upper shaping mold 40 and the lower shaping mold 50 include a mold barrel shell I 501 and a mold barrel shell II 502. The mold barrel shell I 501 and the mold barrel shell II 502 jointly form a cylindrical mold. Flanging grooves 503 are opened at the upper and lower edges of the inner cavities of the mold barrel shell I 501 and the mold barrel shell II 502, and the diameter of the flanging groove 503 is larger than the diameter of the inner cavity of the cylindrical mold; A hanging ear frame I 504 is fixedly provided on the outer wall of the edge of the mold barrel shell I 501, and a hanging ear frame II 506 is fixedly provided on the outer wall of the edge of the mold barrel shell II 502. Clamping grooves 505 are opened on both the hanging ear frame I 504 and the hanging ear frame II 506, and a clamping component 507 is rotatably provided at the position of the clamping groove 505 opposite to the hanging ear frame II 506;

[0051] Please refer to the appendix Figure 9 As shown, a pouring hopper 508 is further fixedly provided at the top end of the mold barrel shell II 502 corresponding to the upper shaping mold 40, and the pouring hopper 508 is communicated with the inner cavity of the cylindrical mold;

[0052] Please refer to the appendix Figure 10 As shown, the clamping assembly 507 includes a hand-held button head 5071 and a main connecting rod 5072. A clamping gasket 5073 is provided at the connection between the hand-held button head 5071 and the main connecting rod 5072, and the clamping gasket 5073 is arranged in a circular ring shape; a steering pin 5074 is fixedly provided on the outer wall at one end of the main connecting rod 5072, a threaded stud head 5075 is fixedly provided at the other end of the main connecting rod 5072, the main connecting rod 5072 is rotatably connected to the clamping groove 505 through the steering pin 5074, the inner diameter of the clamping gasket 5073 is larger than the outer diameter of the threaded stud head 5075 and smaller than the outer diameter of the main connecting rod 5072; an adjustment hole 5076 is opened at the center of the hand-held button head 5071, and the hand-held button head 5071 is threadedly connected to the threaded stud head 5075 through the adjustment hole 5076;

[0053] Please refer to the appendix Figure 5-6 As shown, the distance between the two shaped arc surfaces 303 corresponding to the precast end column 302 is equivalent to the inner cavity size of the cylindrical mold; an assembly hole 104 is opened at the position where the coordination groove 103 is aligned with the reinforced steel column 307, and the inner diameter of the coordination groove 103 is larger than the outer diameter of the upper shaping mold 40 / lower shaping mold 50;

[0054] Specifically, first transport the precast reinforced concrete lower column 30 to the cross intersection of the precast reinforced concrete beam 10, move the main column body 301 to align with the connection platform 102, insert the reinforced steel column 307 corresponding to the precast reinforced concrete lower column 30 into the assembly hole 104 at the bottom surface of the connection platform 102 to complete the installation / fixation of the main column body 301 at the ground. Subsequently, clamp the corresponding mold cylinder shell I 501 and mold cylinder shell II 502 of the lower shaping mold 50 at the position of the precast end column 302 at the top of the precast reinforced concrete lower column 30. In the body position limitation of the shaped arc surface 303 and the coordination groove 103 at the bottom surface of the connection platform 102 (i.e., Figures 1 to 2 of the assembly drawing), first, use the pouring channel 105 at the top of the connection platform 102 as the pouring port, pour the concrete into the lower shaping mold 50 between the top of the precast reinforced concrete lower column 30 and the precast reinforced concrete beam 10, so as to pour the lower half of the pouring load-bearing column 01 between the top of the precast reinforced concrete lower column 30 and the pouring channel 105. Then, by the same steps, align and install the precast reinforced concrete upper column 20 and the upper shaping mold 40 at the coordination groove 103 at the top of the connection platform 102, and pour the concrete into the inner cavity of the upper shaping mold 40 by the pouring hopper 508 to complete the pouring preparation of the upper half of the pouring load-bearing column 01;

[0055] In addition, the reinforcing steel column 307 that can directly align the precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30 can be respectively assembled into the top and bottom assembly holes 104 of the connection platform 102. Then, the barrel shell I 501 and the barrel shell II 502 of the upper shaping mold 40 and the lower shaping mold 50 are aligned and installed respectively. Through the rotation of the main connecting rod 5072 of the clamping assembly 507 via the steering pin 5074, the end of the main connecting rod 5072 near the threaded column head 5075 is clamped into the clamping groove 505 aligned with the hanging ear frame I 504. Rotate the hand-held button head 5071. Through the threaded connection between the threaded column head 5075 and the adjustment hole 5076, adjust the position of the hand-held button head 5071 relative to the hanging ear frame I 504, so that the end of the hand-held button head 5071 together with the clamping gasket 5073 clamps and fixes the positions of the hanging ear frame I 504 and the hanging ear frame II 506, and then completes the assembly of the upper shaping mold 40 and the lower shaping mold 50 (i.e., Figure 2 ). Subsequently, directly pour concrete by the pouring hopper 508. During this period, a bulkhead vibrator can be used to remove air bubbles in the concrete. After the concrete solidifies, rotate the hand-held button head 5071 and then disassemble the upper shaping mold 40 and the lower shaping mold 50 respectively, and carve and remove the overflow spout convex block of the pouring hopper 508 at the alignment position of the upper shaping mold 40, so as to form a pouring and connecting column 01 that connects the precast reinforced concrete beam 10, the precast reinforced concrete upper column 20, and the precast reinforced concrete lower column 30 together (i.e., Figure 3 ). The integration connection is carried out in the way of on-site mold pouring wet connection. Through the direct connection between the pouring and connecting column 01 and the precast reinforced concrete beam 10, the pouring and connecting column 01 is made by grouting the precast parts in the shaping mold, and the wet connection between the pouring and connecting column 01 and the precast end column 302 is of a bite type, and steel bars are arranged at the connection interface to form a mechanical connection, so as to form an integrated pouring and connecting column 01 for connection, which can better transfer internal forces, improve the integrity and seismic performance of the beam and column. Each component is prefabricated. The on-site wet connection only needs to prepare the pouring and connecting column 01 by the shaping mold, which can ensure its applicability to the occasions requiring rapid construction, ensure the construction speed, and at the same time ensure the stress requirements such as the connection strength and transverse shear force at the interface of the connecting piece, meeting the requirements of the society with continuous technological development for the construction speed and stress strength of precast concrete;

[0056] Example 2:

[0057] Based on Example 1, please refer to Figures 4 to 7 , this example provides a solution for sealing the connection between the pouring and connecting column 01 and the precast reinforced concrete beam 10, which is as follows: As Figure 4 , dry connection external fittings 02 are installed on the outer sides of the corresponding pouring and connecting column 01 of the precast reinforced concrete upper column 20 and the precast reinforced concrete lower column 30;

[0058] As Figure 7The dry connection external accessories 02 include an outer plate 021 and expansion bolts 022; the contact surface of adjacent outer plates 021 is set to a 45° surface, and the outer plate 021 is provided with a mounting hole equivalent to the expansion bolt 022; the thickness and height of the outer plate 021 are set to the same size, and the height of the outer plate 021 is equal to the height of the cast supporting column 01, and the length of the outer plate 021 is the same as the size of the mounting edge of the main column 301; the outer surface of the outer plate 021 is sprayed with anti-rust paint of the same color as the main column 301.

[0059] The specific implementation method is as follows: after the upper shaping mold 40 and the lower shaping mold 50 are used to cast the loading column 01, the outer plate 021 is selected to form a frame-shaped dry connection external accessory 02 through the inclined contact surface, and a hole is opened in the loading column 01 along the installation hole using an electric hammer, and the expansion bolt 022 is used to complete the fixation of the dry connection external accessory 02 and the loading column 01 along the installation hole, and the outer plate 021 is sprayed with an anti-rust paint of the same color as the main column 301, and the overall installation of the dry connection external accessory 02 and the reinforced concrete component is completed, so that the overall appearance of the assembled beam-column connection is unified, and the thin lines caused by the difference in appearance of the connection on site are avoided. In order to reduce the deviation of the greasy degree, the dry connection method of the dry connection external accessories 02 and the reinforced concrete is coordinated with the wet connection of the fixed mold on-site casting to replace the traditional separate dry connection or wet connection. On the one hand, the dry connection method of the dry connection external accessories 02 can be used to reduce the amount of concrete used compared with the wet connection casting, thereby shortening the solidification and oxidation time of the concrete at the casting point and ensuring the shortening of the construction period; on the other hand, the fixed mold is used to cast the loading column 01 to ensure the wet connection at the connection to the reinforced concrete. Guarantee the connection strength and seismic performance, effectively solve the relative disadvantages of the separate reinforced concrete dry connection and reinforced concrete wet connection in the traditional process.

[0060] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0061] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0062] Finally, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A precast reinforced concrete beam-column connection structure, comprising a precast reinforced concrete beam (10), a precast reinforced concrete upper column (20) and a precast reinforced concrete lower column (30), characterized in that: A detachable lower shaping mold (50) is provided between the top end of the precast reinforced concrete lower column (30) and the precast reinforced concrete beam (10), and a detachable upper shaping mold (40) is provided between the bottom end of the precast reinforced concrete upper column (20) and the precast reinforced concrete beam (10). Both the precast reinforced concrete upper column (20) and the precast reinforced concrete lower column (30) include a main column body (301) and a precast end column (302). A settlement groove (304) is provided at the top end of the precast end column (302). Wedge-shaped guiding grooves (305) are longitudinally provided at the centers of the four bottom edges of the precast end column (302). The settlement groove (304) is arranged in a cross shape. The top end of the precast end column (302) is divided into four groups of independent upper platforms by the settlement groove (304), and the guiding grooves (305) and the settlement groove (304) divide the center of the precast end column (302) into a center platform with a height lower than that of the upper platform. A precast end column (302) is fixedly provided at the connection end of the main column body (301) and the precast reinforced concrete beam (10). A shaping arc surface (303) is provided at the edge of the precast end column (302), and the guiding groove (305) communicates with the settlement groove (304). The precast end column (302) and the main column body (301) are integrally cast and preformed, and the precast end column (302) is arranged in a trapezoidal shape with a narrower top and a wider bottom. Reinforcing steel column (307) is arranged on the upper platform during prefabrication, and a steel bar framework (306) is arranged on the center platform during prefabrication. The precast reinforced concrete beam (10) includes a main beam body (101). A connection platform (102) is fixedly provided at the cross intersection of the two main beam bodies (101). Coordination grooves (103) are provided at both the top and bottom ends of the connection platform (102), and a pouring channel (105) longitudinally penetrating the connection platform (102) is further provided at the center of the coordination groove (103) for performing wet connection pouring at the connection between the top end of the precast reinforced concrete lower column (30) and the precast reinforced concrete beam (10). Through the pouring of the pouring channel (105), a pouring load-bearing column (01) is formed on the connection platform (102) within the lower shaping mold (50).

2. The precast reinforced concrete beam-column connection structure according to claim 1, characterized in that: Both the upper shaping mold (40) and the lower shaping mold (50) include a mold cylinder shell I (501) and a mold cylinder shell II (502). The mold cylinder shell I (501) and the mold cylinder shell II (502) jointly form a cylindrical mold. Flanging grooves (503) are provided at the upper and lower edges of the inner cavities of the mold cylinder shell I (501) and the mold cylinder shell II (502), and the diameter of the flanging groove (503) is larger than the diameter of the inner cavity of the cylindrical mold. A hanging ear frame I (504) is fixedly provided on the outer wall of the edge of the mold cylinder shell I (501), and a hanging ear frame II (506) is fixedly provided on the outer wall of the edge of the mold cylinder shell II (502). Locking grooves (505) are provided on both the hanging ear frame I (504) and the hanging ear frame II (506), and a clamping assembly (507) is rotatably provided at the position of the locking groove (505) at the alignment position of the hanging ear frame II (506).

3. A precast reinforced concrete beam-column connection structure according to claim 2, characterized in that: At the top of the mold barrel shell II (502) corresponding to the upper shaping mold (40), a pouring hopper (508) is fixedly provided, and the pouring hopper (508) is communicated with the inner cavity of the cylindrical mold; The clamping assembly (507) includes a hand-held button head (5071) and a main connecting rod (5072). A clamping gasket (5073) is provided at the connection between the hand-held button head (5071) and the main connecting rod (5072), and the clamping gasket (5073) is arranged in a circular ring shape; A steering pin (5074) is fixedly provided on the outer wall at one end of the main connecting rod (5072), and a threaded stud head (5075) is fixedly provided at the other end of the main connecting rod (5072). The main connecting rod (5072) is rotationally connected to the clamping groove (505) through the steering pin (5074). The inner diameter of the clamping gasket (5073) is larger than the outer diameter of the threaded stud head (5075) and smaller than the outer diameter of the main connecting rod (5072); An adjustment hole (5076) is opened at the center of the hand-held button head (5071), and the hand-held button head (5071) is threadedly connected to the threaded stud head (5075) through the adjustment hole (5076).

4. A precast reinforced concrete beam-column connection structure according to claim 1, characterized in that: The distance between the two shaping arc surfaces (303) corresponding to the precast end column (302) is equivalent to the size of the inner cavity of the cylindrical mold; an assembly hole (104) is opened at the position where the coordination groove (103) is aligned with the reinforced steel column (307), and the inner diameter of the coordination groove (103) is larger than the outer diameter of the upper shaping mold (40) / lower shaping mold (50).

5. A precast reinforced concrete beam-column connection structure according to claim 1, characterized in that: The precast end column (302) corresponding to the precast reinforced concrete upper column (20) is formed into a casting load-bearing column (01) by pouring with the upper shaping mold (40). Dry connection external fittings (02) are installed on the outer sides of the casting load-bearing columns (01) corresponding to the precast reinforced concrete upper column (20) and the precast reinforced concrete lower column (30); The dry connection external fitting (02) includes an outer peripheral plate (021) and an expansion bolt (022); The contact surface between adjacent outer peripheral plates (021) is set as an inclined surface of 45°, and installation holes corresponding to the expansion bolts (022) are opened on the outer peripheral plates (021).

6. The precast reinforced concrete beam-column connection structure according to claim 5, characterized in that: The thickness and height of the outer peripheral plate (021) are both set to the same size, and the height of the outer peripheral plate (021) is equal to the height of the casting load-bearing column (01), and the length of the outer peripheral plate (021) is the same as the size of the alignment installation edge of the main column body (301); An anti-rust paint equivalent to the color of the main column body (301) is sprayed on the outer surface of the outer peripheral plate (021).

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