Fabricated beam-column joint of frame structure and construction method thereof

Abstract

The application relates to the technical field of connecting nodes in general building construction, in particular to a fabricated beam-column node of a frame structure and a construction method thereof. The prefabricated concrete stand column, the bracket and the steel column sleeve are integrally cast and formed, the overall structural strength of the prefabricated concrete stand column, the bracket and the steel column sleeve is improved, and a structural support foundation is provided for the installation of a prefabricated concrete cross beam in the later period; the beam limiting column arranged at the front end of the prefabricated concrete cross beam is clamped with the beam limiting blind hole arranged in the steel column sleeve and the bracket, the connection and fixation between the beam and the column are realized; meanwhile, the front ends of the four prefabricated concrete cross beams are clamped with each other, the mutual locking between the four prefabricated concrete cross beams is realized; the connection and fixation of the fabricated beam-column can be realized without needing to open holes and arrange bolts in the area where the prefabricated concrete stand column and the cross beam body are located, and the beam and the column at the connection position are not prone to damage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of connecting nodes in general building construction, in particular to an assembled beam-column joint of a frame structure and a construction method thereof. BACKGROUND

[0002] The assembled building refers to a building which is manufactured by transferring a large number of on-site operations in the traditional construction mode to a factory, processing and manufacturing building components and accessories in the factory, transporting them to the building construction site, and assembling and installing them on the site through reliable connection methods. The connection structure of the beam and column is an important part of the assembled building.

[0003] At present, the connection of the beam and column is generally directly drilled on the concrete beam and the concrete column and fixed by high-strength bolts. If the number of drilled holes and connecting bolts is too small, the connection strength of the connecting joint is low and the stability is poor. If the number of drilled holes and connecting bolts is too large, the structural strength of the concrete beam and the concrete column is greatly reduced and damaged. In the later extreme situation of earthquake, there is great safety hazard.

[0004] Furthermore, the Chinese patent document with publication number CN113006274A discloses a novel prefabricated assembly type frame structure beam column dry type connecting joint, which comprises a prefabricated concrete beam, a prefabricated concrete lower column, a prefabricated concrete upper column, a connecting end, high-strength bolts, corbels, the end of the prefabricated concrete beam is provided with a connecting end, the connecting end is provided with a shear key on the side close to the prefabricated concrete upper column, the lower part of the connecting end is provided with a reserved vertical steel bar, the inside of the connecting end is provided with a reserved through hole, the lower part of the connecting end is provided with a rabbet joint one; the two sides of the reserved concrete lower column are respectively provided with corbels, the inside of the corbel is provided with a corbel reserved hole, the corbel is provided with a rabbet joint two on the upper part, the prefabricated concrete lower column is provided with a limiting block on the upper part, the inside of the prefabricated concrete lower column is provided with a longitudinal steel bar reserved hole, the connecting end and the corbel are connected by inserting the reserved vertical steel bar into the corbel reserved hole; the lower end of the prefabricated concrete upper column is provided with a reserved longitudinal steel bar, the reserved longitudinal steel bar is inserted into the longitudinal steel bar reserved hole of the prefabricated concrete lower column, the prefabricated concrete upper column is provided with a reserved steel sleeve and a shear key on the upper part; the prefabricated concrete upper column and the prefabricated concrete lower column are connected by inserting the prefabricated longitudinal steel bar into the longitudinal steel bar reserved hole, after the upper part reserved through hole of the connecting end is aligned with the reserved steel sleeve in the column body, the high-strength bolts are used for fixation, a gap is arranged between the shear keys, and high-strength concrete slurry is injected in the gap. By reserving the vertical steel bar in the connecting end, in the process of moving the beam downward, the reserved vertical steel bar is aligned and passes through the vertical reserved hole of the corbel, and the high-strength concrete slurry is injected, so that first fixation is realized; the horizontal through hole arranged at the top of the connecting end is connected with the column body, after the first fixation is completed, the horizontal through hole is automatically aligned, the high-strength bolt is directly inserted and screwed in without being tightened, then the high-strength concrete slurry is injected in the gap, so that the fixation is completed, the shear keys between the beam end and the column surface assist the corbel in resisting shearing, and the purposes of facilitating construction installation, good force transmission effect and high joint strength are realized. The above scheme still has the following disadvantages: the multiple corbels are independently arranged on the outer circumferential side of the reserved concrete lower column, and the corbels lack a protection structure, each cross beam is connected with the corbel and the prefabricated concrete upper column by using an independently arranged connecting structure, and the cross beams lack positioning connecting structures therebetween, so that the overall reliability needs to be further improved; although the prefabricated concrete upper column uses the reserved steel sleeve to connect the horizontal high-strength bolt, the essence is still to arrange the reserved opening in the prefabricated concrete upper column, which will affect the structural strength of the prefabricated concrete column to a certain extent; in addition, the grouting operation of the high-strength concrete slurry exists in the construction process, the dry type connection is not completely realized, and the construction is inconvenient to a certain extent. SUMMARY

[0005] The technical problem to be solved by the present application is to provide an assembly type beam column joint of a frame structure, which can effectively improve the connecting strength and reliability at the joint under the premise of facilitating construction.

[0006] The technical scheme adopted by the present application to solve its technical problems is: the assembled beam-column joint of the frame structure comprises prefabricated concrete cross beams, prefabricated concrete vertical columns and a bolt assembly, four prefabricated concrete cross beams are arranged in a cross shape around the prefabricated concrete vertical column, a corbel is arranged on the outer wall of the prefabricated concrete vertical column in an annular overall arrangement, a steel column sleeve is arranged outside the corbel, the steel column sleeve, the corbel and the prefabricated concrete vertical column are an integral structure fixed by pouring, the steel column sleeve at least comprises an annular main cylinder located outside the corbel, a main cylinder upper end plate located at the upper end surface of the corbel and a main cylinder lower end plate located at the lower end surface of the corbel, and the main cylinder upper end plate and the main cylinder lower end plate are both arranged horizontally; the front ends of the prefabricated concrete cross beams are all fixedly connected to the upper surface of the main cylinder upper end plate, the front ends of the prefabricated concrete cross beams are all fixedly provided with beam limiting columns, the main cylinder upper end plate is provided with beam limiting blind holes penetrating into the corbel in the vertical direction, and the beam limiting columns are respectively clamped in the beam limiting blind holes; each prefabricated concrete cross beam comprises a cross beam body, a left concrete clamping piece and a right concrete clamping piece, the left concrete clamping piece and the right concrete clamping piece are respectively arranged at the left and right sides of the front end of the cross beam body, the left concrete clamping piece of each cross beam body is clamped with the right concrete clamping piece of the cross beam body adjacent to the left side thereof, and the right concrete clamping piece of each cross beam body is clamped with the left concrete clamping piece of the prefabricated concrete cross beam adjacent to the right side thereof; the left concrete clamping piece is composed of a lower concrete base and an upper concrete clamping table, the lower concrete base is arranged at the lower part of the left side end surface of the front end of the prefabricated concrete cross beam, and the upper concrete clamping table is arranged at the upper end surface of the lower concrete base away from the cross beam body; the right concrete clamping piece comprises an upper concrete base arranged at the upper part of the right side end surface of the front end of the prefabricated concrete cross beam, and the upper concrete base is provided with an upper clamping notch at the end away from the cross beam body; the lower concrete base and the upper concrete base are mutually superimposed, and the upper concrete clamping table is clamped in the upper clamping notch; the bolt assembly comprises a consolidation main bolt and a locking nut in cooperation, the axes of the consolidation main bolts are all arranged vertically, the consolidation main bolt is arranged in the connecting part of each left concrete clamping piece and right concrete clamping piece, the consolidation main bolt penetrates through the connecting part of the left concrete clamping piece and the right concrete clamping piece, the main cylinder upper end plate, the corbel and the main cylinder lower end plate, and the left concrete clamping piece, the right concrete clamping piece, the corbel and the steel column sleeve are fixed into an integral structure by cooperation with the locking nut.

[0007] In order to facilitate prefabrication and assembly and further improve the reliability of the joint, preferably, the lower concrete base is a cuboid structure, and the right side end surface thereof and the left side end surface of the cross beam body are an integral structure; the upper concrete clamping table is a right-angle quadrangular prism structure and is arranged at the left rear of the upper end surface of the lower concrete base; the upper concrete base is a cuboid structure, and the left side end surface thereof and the right side end surface of the cross beam body are an integral structure; and the upper clamping notch is a right-angle quadrangular prism structure and is arranged at the right rear of the upper concrete base.

[0008] For the convenience of assembly, preferably, the contact surface between the outer wall of the upper concrete clamping block and the inner wall of the upper clamping notch is arc-shaped.

[0009] To further improve the reliability at the node, preferably, the left and right concrete clamping blocks are respectively provided with a steel sheath.

[0010] To further improve the reliability at the node, preferably, the bolt assembly further comprises a metal adjusting piece, a metal fixing piece, and a second connecting bolt, the consolidation main bolt is a high-strength bolt, the consolidation main bolt is arranged in a rectangular shape, the metal fixing piece is arranged below the lower end plate of the main cylinder, the metal fixing piece is arranged in four, the metal fixing piece is fixed at the bottom of the consolidation main bolt one by one, the metal adjusting piece and the locking nut are arranged above the prefabricated concrete beam, and the metal adjusting piece is arranged between the prefabricated concrete beam and the locking nut, the metal adjusting piece is arranged in four, the metal adjusting piece is slidably sleeved on the consolidation main bolt one by one, and the adjacent two metal fixing pieces and the adjacent two metal adjusting pieces are connected and fixed by the second connecting bolt and the fixed nut.

[0011] To facilitate processing and assembly, and effectively ensure the structural reliability of the bolt assembly, preferably, the metal adjusting piece and the metal fixing piece are the same structure, and both comprise a metal base plate fixed as a whole, a metal sleeve, and two side wing plates; the metal base plate is in a fan shape and is fixed perpendicularly on the outer wall of the metal sleeve, the two side wing plates are perpendicular to each other and are both fixed on the outer wall of the metal sleeve, and one end of each of the two side wing plates is fixed perpendicularly on the metal base plate; the side wing plates are both provided with a connecting bolt hole for connecting the second connecting bolt, the lower end of the consolidation main bolt is arranged in the metal sleeve of the metal fixing piece and is welded and fixed, and the metal adjusting piece is slidably sleeved on the consolidation main bolt through the metal sleeve thereof.

[0012] To facilitate prefabrication and further improve the reliability at the node, preferably, the annular main cylinder, the upper end plate of the main cylinder, and the lower end plate of the main cylinder are welded and fixed as a whole, the steel column sleeve further comprises an upper column sleeve and a lower column sleeve, the upper column sleeve and the lower column sleeve are both fixedly sleeved on the outer periphery of the prefabricated concrete column, the lower end of the upper column sleeve is welded and fixed together with the upper end plate of the main cylinder, and the upper end of the lower column sleeve is welded and fixed together with the lower end plate of the main cylinder; the steel column sleeve is fixed as a whole with the corbel and the steel reinforcement frame arranged inside the prefabricated concrete column; the horizontal cross section of the prefabricated concrete column is rectangular, and the outer peripheral surface of the corbel is a conical quadrangular prism surface with the upper end longer than the lower end.

[0013] To further improve the connection strength at the node, and effectively protect the clamping positioning structure of the four prefabricated concrete cross beams, preferably, the overall formed after each left concrete clamping piece is clamped with the right concrete clamping piece is a cross beam clamping connection assembly, each cross beam clamping connection assembly is a cuboid structure, and the upper surface of the cross beam clamping connection assembly is flush with the upper surface of the prefabricated concrete cross beam, and the lower surface of the cross beam clamping connection assembly is flush with the lower surface of the prefabricated concrete cross beam; an upper cover plate assembly is installed above the upper end plate of the main cylinder, the upper cover plate assembly comprises a rectangular top plate and four L-shaped corner guard plates; the center of the rectangular top plate is provided with a center column through hole, and the rectangular top plate is sleeved outside the upper column sleeve through the center column through hole, and the lower surface of the rectangular top plate is attached to or has a set gap with the upper surface of the prefabricated concrete cross beam; the L-shaped corner guard plate is a columnar piece with an L-shaped horizontal cross section, the L-shaped corner guard plate is arranged outside the cross beam clamping connection assembly, the four L-shaped corner guard plates are respectively fixed at the four corners of the outer edge of the lower surface of the rectangular top plate, and the inner surface of the inner corner side of the L-shaped corner guard plate is attached to or has a set gap with the outer side of the cross beam clamping connection assembly; an axis vertically arranged cover limiting column is fixedly arranged on the lower end surface of each L-shaped corner guard plate, and the upper surface of the upper end plate of the main cylinder is provided with a limiting column hole corresponding to the cover limiting column, and the cover limiting column is clamped in the limiting column hole; the rectangular top plate is provided with a bolt hole corresponding to the consolidation main bolt, and the rectangular top plate, the left concrete clamping piece, the right concrete clamping piece, the corbel and the steel column sleeve are fixed as a whole through the cooperation of the consolidation main bolt and the locking nut.

[0014] To further improve the connection strength at the node, preferably, the upper cover plate assembly comprises four inner guard plates, the four inner guard plates are respectively fixed at the edges of the four sides of the center column through hole, the upper end of the inner guard plate is fixedly connected with the lower surface of the rectangular top plate, and the front end surface of the cross beam body is provided with a guard plate notch extending in the vertical direction, the inner guard plate is clamped in the guard plate notch of the front end surface of the cross beam body and inserted into the beam limiting blind hole.

[0015] Based on the frame structure assembly type beam column joint described in the foregoing, the application also provides a construction method of the frame structure assembly type beam column joint, which comprises the following steps:

[0016] Step S1, pouring and hoisting of the prefabricated concrete stand column:

[0017] According to the drawings, the steel bars inside the prefabricated concrete stand column and the corbel are bound, the steel column sleeve is then welded and assembled outside the steel bars of the prefabricated concrete stand column and the corbel, finally, the concrete formwork is installed and the concrete is poured to form the overall structure of the prefabricated concrete stand column, the corbel and the steel column sleeve, and the beam limiting blind hole and the bolt hole corresponding to the consolidation main bolt are reserved at the same time; the prefabricated concrete stand column poured is hoisted;

[0018] Step S2, pouring of the prefabricated concrete cross beam:

[0019] According to the drawings, the steel bars inside the four prefabricated concrete cross beams are bound, the concrete formwork is installed, and the concrete is poured to obtain four prefabricated concrete cross beams with left and right concrete engaging structures; at the same time, bolt holes corresponding to the main bolt are reserved;

[0020] Step S3, hoisting of the prefabricated concrete cross beam:

[0021] The four prefabricated concrete cross beams are hoisted to the prefabricated concrete column, the front ends of the four prefabricated concrete cross beams are arranged in a ring shape around the prefabricated concrete column and above the upper end plate of the main cylinder, the central axes of the four prefabricated concrete cross beams are located on the same horizontal plane and arranged in a cross shape; then the four prefabricated concrete cross beams are rotated at a certain angle along their central axes, so that the left concrete engaging part on one side of the bottom surface of each prefabricated concrete cross beam is lower than the right concrete engaging part on the other side; then the four prefabricated concrete cross beams are moved forward along their central axes to the designed position; then the four prefabricated concrete cross beams are rotated synchronously along their central axes, so that the left and right concrete engaging parts of all the prefabricated concrete cross beams are gradually engaged in place; after the four prefabricated concrete cross beams are connected as a whole through the left and right concrete engaging parts, the prefabricated concrete cross beams are lowered to the designed position, and the beam limiting columns at the front ends of the four prefabricated concrete cross beams are engaged in the beam limiting blind holes;

[0022] Step S4, fixing and connecting the bolt assembly.

[0023] To further improve the connection strength at the node and effectively protect the clamping and positioning structure of the four prefabricated concrete cross beams, the preferred solution is that in step S1, when pouring and hoisting the prefabricated concrete column, each beam limiting blind hole can allow the beam limiting column and the inner guard plate of the upper cover plate assembly to be clamped in at the same time, and a limiting column hole for clamping with the cover limiting column of the upper cover plate assembly is provided on the upper surface of the upper end plate of the main cylinder in advance;

[0024] In step S2, a guard plate notch extending vertically is reserved on the front end face of the cross beam body;

[0025] Step S3, when hoisting the prefabricated concrete cross beam, four prefabricated concrete cross beams are connected into a whole through the left concrete clamping piece and the right concrete clamping piece, and the whole formed after each left concrete clamping piece and right concrete clamping piece are clamped is a cross beam clamping connection assembly, each cross beam clamping connection assembly is a cuboid structure, and the upper surface of the cross beam clamping connection assembly is flush with the upper surface of the prefabricated concrete cross beam, and the lower surface of the cross beam clamping connection assembly is flush with the lower surface of the prefabricated concrete cross beam; then an upper cover plate assembly prepared in advance is installed above the upper end plate of the main cylinder, the upper cover plate assembly comprises a rectangular top plate and four L-shaped corner guards, the center of the rectangular top plate is provided with a center column through hole, and the rectangular top plate is provided with a bolt hole one corresponding to the consolidation main bolt; the L-shaped corner guard is a columnar piece with an L-shaped horizontal cross section, the inner corner side of the L-shaped corner guard faces the axis of the center column through hole, the four L-shaped corner guards are respectively fixed at the four corners of the outer edge of the lower surface of the rectangular top plate, and the lower end face of each L-shaped corner guard is fixedly provided with a cover limiting column with an axis vertically arranged; the upper cover plate assembly comprises four inner guards, the four inner guards are respectively fixed at the edges of the four sides of the center column through hole, and the upper end of the inner guard is fixedly connected with the lower surface of the rectangular top plate; when the upper cover plate assembly is installed, the center column through hole is sleeved outside the prefabricated concrete column, if the steel column sleeve further comprises an upper column sleeve, the upper cover plate assembly is sleeved outside the upper column sleeve through the center column through hole, the lower surface of the rectangular top plate is attached to the upper surface of the prefabricated concrete cross beam or has a set gap; the L-shaped corner guard is arranged outside the cross beam clamping connection assembly, and the inner surface of the inner corner side of the L-shaped corner guard is attached to the outer side surface of the cross beam clamping connection assembly or has a set gap, the cover limiting column is clamped in the limiting column hole, and the inner guard is clamped in the guard notch of the front end face of the beam body and inserted into the beam limiting blind hole;

[0026] Step S4, when fixing the connecting bolt assembly, the rectangular top plate, the left concrete clamping piece, the right concrete clamping piece, the corbel and the steel column sleeve are fixed into a whole through the cooperation of the consolidation main bolt and the locking nut.

[0027] The beneficial effects of the present application are:

[0028] (1) The prefabricated concrete column, the corbel and the steel column sleeve integrally formed improve the overall structural strength of the prefabricated concrete column, the corbel and the steel column sleeve, and provide a structural support foundation for the installation of the prefabricated concrete cross beam in the later stage; at the same time, the prefabricated concrete column and the corbel can be protected by the steel column sleeve, preventing damage to the prefabricated concrete column and the corbel at the stress point, and improving the connection quality of the connection structure.

[0029] (2) through the precast concrete beam front end set beam limiting column and steel column sleeve and the beam limiting blind hole in the bracket of the card, to realize the connection between beam column fixed; At the same time, the front end of four precast concrete beams are placed on the bracket of the four side end faces of the precast concrete column, and the left concrete clamping piece and the right concrete clamping piece of each precast concrete beam are respectively clamped with the right concrete clamping piece of the left adjacent precast concrete beam and the left concrete clamping piece of the right adjacent precast concrete beam, so as to realize the mutual locking of the four precast concrete beams.

[0030] (3) the frame structure of the assembled beam column node, the structure is compact, and the precast concrete column (not including bracket and steel column sleeve) and the beam body in the area need not be opened and bolted to realize the connection of the assembled beam column, the beam column at the connection is not easy to be damaged, the firmness and stability are high, and the connection strength is high.

[0031] (4) the construction method avoids the secondary grouting of concrete in the construction site, and is simple, convenient, fast, safe and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 the overall structure schematic diagram of the frame structure of the assembled beam column node of the application;

[0033] Figure 2 is Figure 1 the vertical section view of the elevation in the A-A direction (that is, the vertical section view through the axis of the precast concrete column, the axis of the concrete beam one and the axis of the concrete beam three);

[0034] Figure 3 the overall structure schematic diagram of the precast concrete column, bracket and steel column sleeve of the application;

[0035] Figure 4 the overall structure schematic diagram of the four precast concrete beams of the application after being clamped and assembled;

[0036] Figure 5 is Figure 4 the structure schematic diagram of the concrete beam one in the;

[0037] Figure 6 the structure schematic diagram of the concrete beam two in the; Figure 4

[0038] Figure 7 the structure schematic diagram of the upper cover plate assembly of the application;

[0039] Figure 8 the structure schematic diagram of the bolt assembly of the application;

[0040] ​Figure 9 Structure diagram of metal adjusting member (or metal fixing member) of bolt assembly of the present application.

[0041] In the figure, the components are marked as: prefabricated concrete cross beam 1, concrete cross beam one 11, concrete cross beam two 12, concrete cross beam three 13, concrete cross beam four 14, cross beam body 15, left concrete clamping member 16, lower concrete base 161, upper concrete clamping table 162, right concrete clamping member 17, upper concrete base 171, upper clamping notch 172, bolt hole two 18, guard plate notch 19, prefabricated concrete column 2, steel column sleeve 3, annular main cylinder 31, upper column sleeve 32, lower column sleeve 33, beam limiting blind hole 34, limiting column hole 35, bolt hole three 36, upper cover plate assembly 4, rectangular top plate 41, L-shaped corner guard plate 42, cover limiting column 43, center column through hole 44, bolt hole one 45, inner guard plate 46, bolt assembly 5, consolidation main bolt 51, metal adjusting member 52, metal fixing member 53, second connecting bolt 54, locking nut 55, metal base plate 521, metal sleeve 522, side wing plate 523, connecting bolt hole 524, sleeve center hole 525. DETAILED DESCRIPTION

[0042] The present application will be further described below in conjunction with the drawings and examples.

[0043] As Figures 1 to 9 shown, the frame structure's fabricated beam-column joint of the present application includes prefabricated concrete cross beam 1, prefabricated concrete column 2 and bolt assembly 5, and the prefabricated concrete cross beam 1 is arranged in a cross shape around the prefabricated concrete column 2 with four. The four prefabricated concrete cross beams 1 are arranged in a cross shape around the prefabricated concrete column 2, that is, each prefabricated concrete cross beam 1 is orthogonal to the prefabricated concrete column 2, and the axis lines of the adjacent two prefabricated concrete cross beams 1 form an angle of 90°. In the embodiment shown in the figure, the four prefabricated concrete cross beams correspond to concrete cross beam one 11, concrete cross beam two 12, concrete cross beam three 13 and concrete cross beam four 14 respectively, and the concrete cross beam one 11 and the concrete cross beam three 13 are coaxially arranged (the axis lines of the two are set as the first axis line), the concrete cross beam two 12 and the concrete cross beam four 14 are coaxially arranged (the axis lines of the two are set as the second axis line), and the first axis line and the second axis line are perpendicular to each other.

[0044] The outer wall of the prefabricated concrete column 2 is provided with a corbel arranged in an annular whole, and the outer side of the corbel is provided with a steel column sleeve 3, the steel column sleeve 3, the corbel and the prefabricated concrete column 2 are integrally formed by pouring, the steel column sleeve 3 at least includes an annular main cylinder 31 located on the outer side of the corbel, a main cylinder upper end plate located on the upper end surface of the corbel and a main cylinder lower end plate located on the lower end surface of the corbel, and the main cylinder upper end plate and the main cylinder lower end plate are both horizontally arranged. The prefabricated concrete column 2, the corbel and the steel column sleeve 3 are integrally formed by pouring first, which improves the overall structural strength of the prefabricated concrete column 2, the corbel and the steel column sleeve 3, and provides a structural support foundation for the installation of the prefabricated concrete beam 1 in the later stage. At the same time, the prefabricated concrete column 2 and the corbel can be protected by the steel column sleeve 3, which prevents the prefabricated concrete column 2 and the corbel at the stress point from being damaged, and improves the connection quality of the connection structure.

[0045] The front ends of the prefabricated concrete cross beams 1 are fixedly connected to the upper surface of the upper end plate of the main cylinder, and the front ends of the prefabricated concrete cross beams 1 are fixedly provided with beam limiting columns, the upper end plate of the main cylinder is provided with beam limiting blind holes 34 penetrating into the corbels in the vertical direction, and the beam limiting columns are respectively clamped in the beam limiting blind holes 34; each prefabricated concrete cross beam 1 comprises a cross beam body 15, a left concrete clamping piece 16 and a right concrete clamping piece 17, the left concrete clamping piece 16 and the right concrete clamping piece 17 are respectively arranged at the front ends of the two sides of the cross beam body 15, the left concrete clamping piece 16 of each cross beam body 15 is clamped with the right concrete clamping piece 17 of the cross beam body 15 adjacent to the left side of the cross beam body 15, and the right concrete clamping piece 17 of each cross beam body 15 is clamped with the left concrete clamping piece 16 of the prefabricated concrete cross beam 1 adjacent to the right side of the cross beam body 15; the left concrete clamping piece 16 is composed of a lower concrete base 161 and an upper concrete clamping table 162, the lower concrete base 161 is arranged at the lower part of the left side end surface of the front end of the prefabricated concrete cross beam 1, and the upper concrete clamping table 162 is arranged at the upper end surface of the lower concrete base 161 away from the cross beam body 15; the right concrete clamping piece 17 comprises an upper concrete base 171 arranged at the upper part of the right side end surface of the front end of the prefabricated concrete cross beam 1, and the end of the upper concrete base 171 away from the cross beam body 15 is provided with an upper clamping notch 172; the lower concrete base 161 and the upper concrete base 171 are mutually superimposed, and the upper concrete clamping table 162 is clamped in the upper clamping notch 172; the bolt assembly 5 comprises a consolidation main bolt 51 and a locking nut 55 in cooperation, the axis of the consolidation main bolt 51 is vertically arranged, the connection part of each left concrete clamping piece 16 and right concrete clamping piece 17 is provided with a consolidation main bolt 51, the consolidation main bolt 51 simultaneously penetrates through the connection part of the left concrete clamping piece 16 and the right concrete clamping piece 17, the upper end plate of the main cylinder, the corbel and the lower end plate of the main cylinder, and the left concrete clamping piece 16, the right concrete clamping piece 17, the corbel and the steel column sleeve 3 are fixed as a whole through cooperation with the locking nut 55. It can be understood that the consolidation main bolt 51 should meet the design strength requirement, and a high-strength bolt can be preferably used, the "high-strength bolt" is a general term in the art, which is made of high-strength steel, or a bolt that needs to be applied with a large pre-tightening force, and the performance grade of the bolt is usually above 8.8. Correspondingly, the area where the corbel of the prefabricated concrete column 2 and the steel column sleeve 3 are arranged is provided with a bolt hole corresponding to the consolidation main bolt 51, which is the bolt hole three 36 shown in the drawing; the whole formed after the clamping of each left concrete clamping piece 16 and right concrete clamping piece 17 is a cross beam clamping connection assembly, and each cross beam clamping connection assembly is provided with a bolt hole corresponding to the consolidation main bolt 51, which is the bolt hole two 18 shown in the drawing, that is, each left concrete clamping piece 16 and right concrete clamping piece 17 is correspondingly provided with the bolt hole two 18.

[0046] The present application realizes the connection and fixation between the beam and the column by the engagement of the beam limiting column arranged at the front end of the prefabricated concrete beam 1 with the beam limiting blind hole 34 arranged in the bracket of the steel column sleeve 3; meanwhile, the front ends of the four prefabricated concrete beams 1 are arranged on the brackets of the four side end faces of the prefabricated concrete column 2, and the left concrete clamping piece 16 and the right concrete clamping piece 17 of each prefabricated concrete beam 1 are engaged with the right concrete clamping piece 17 of the left adjacent prefabricated concrete beam 1 and the left concrete clamping piece 16 of the right adjacent prefabricated concrete beam 1 respectively, so as to realize the mutual locking of the four prefabricated concrete beams 1. The present application realizes the connection and fixation of the fabricated beam column without opening holes and arranging bolts in the area where the prefabricated concrete column 2 (not including the bracket and the steel column sleeve 3) and the beam body 15 are located, the beam and the column at the connection position are not easy to be damaged, and the fabricated beam column has high firmness, stability and connection strength.

[0047] In order to facilitate prefabrication and further improve the reliability at the joint, in some preferred embodiments, the annular main cylinder 31, the upper end plate and the lower end plate of the main cylinder are welded and fixed as a whole, the steel column sleeve 3 further includes an upper column sleeve 32 and a lower column sleeve 33, the upper column sleeve 32 and the lower column sleeve 33 are fixedly sleeved on the outer periphery of the prefabricated concrete column 2, the lower end of the upper column sleeve 32 is welded and fixed with the upper end plate of the main cylinder, and the upper end of the lower column sleeve 33 is welded and fixed with the lower end plate of the main cylinder; the steel column sleeve 3 is fixed as a whole with the steel reinforcement frame arranged inside the bracket and the prefabricated concrete column 2; the horizontal cross section of the prefabricated concrete column 2 is rectangular, and the outer peripheral surface of the bracket is a conical quadrangular prism surface with the upper end side length greater than the lower end side length, that is, the annular main cylinder 31 is a quadrangular pyramid cylinder structure with the upper end inner diameter greater than the lower end inner diameter.

[0048] The corresponding construction method of the frame structure fabricated beam column joint in the above embodiment includes the following steps:

[0049] Step S1, pouring and hoisting of the prefabricated concrete column 2:

[0050] According to the drawings, the steel reinforcement inside the prefabricated concrete column 2 and the bracket is bound, the steel column sleeve 3 is welded and assembled outside the steel reinforcement of the prefabricated concrete column 2 and the bracket, finally the concrete formwork is installed and the concrete is poured to form the overall structure of the prefabricated concrete column 2, the bracket and the steel column sleeve 3, and the bolt hole (i.e. the bolt hole three 36) corresponding to the beam limiting blind hole 34 and the fixation main bolt 51 is reserved; then the prefabricated concrete column 2 poured is hoisted;

[0051] Step S2, pouring of the prefabricated concrete beam 1:

[0052] According to the drawing, the steel bars inside the four prefabricated concrete beams 1 are bound, the concrete formwork is installed and the concrete is poured to obtain the four prefabricated concrete beams 1 with left concrete engaging members 16 and right concrete engaging members 17; at the same time, the bolt hole (i.e. the second bolt hole 18) corresponding to the fixed main bolt 51 is reserved;

[0053] Step S3: hoisting of the prefabricated concrete beams 1:

[0054] The four prefabricated concrete beams 1 are hoisted to the position of the poured prefabricated concrete columns 2, the front ends of the four prefabricated concrete beams 1 are arranged in a ring shape around the prefabricated concrete columns 2 and above the upper end plate of the main cylinder, the axis lines of the four prefabricated concrete beams 1 are located in the same horizontal plane and arranged in a cross shape (the bottom surfaces of the four prefabricated concrete beams 1 have no specific requirements in the initial state, and for the convenience of synchronous control of the rotation angle, the preferred mode is usually that the bottom surfaces of the four prefabricated concrete beams 1 are horizontally arranged); then the four prefabricated concrete beams 1 are rotated by a certain angle along their own axis lines, so that the side of the bottom surface of each prefabricated concrete beam 1 on which the left concrete engaging member 16 is located is lower than the side on which the right concrete engaging member 17 is located (the specific rotation angle is reasonably designed according to the principle of meeting the subsequent forward movement of the four prefabricated concrete beams 1 along their own axis lines to the designed position; if the bottom surfaces of the four prefabricated concrete beams 1 are horizontally arranged, the left concrete engaging member 16 and the right concrete engaging member 17 of adjacent two prefabricated concrete beams 1 will interfere with each other, so it is necessary to rotate by a certain angle along the own axis line to provide installation space for the subsequent engaging assembly); then the four prefabricated concrete beams 1 are moved forward to the designed position along their own axis lines; then the four prefabricated concrete beams 1 are synchronously rotated along their own axis lines, so that the left concrete engaging members 16 and the right concrete engaging members 17 of all the prefabricated concrete beams 1 are gradually engaged in place at the same time; after the four prefabricated concrete beams 1 are connected into a whole through the engagement of the left concrete engaging members 16 and the right concrete engaging members 17, the prefabricated concrete beams 1 are lowered to the designed position, and the beam limiting columns at the front ends of the four prefabricated concrete beams 1 are engaged in the beam limiting blind holes 34, respectively.

[0055] Step S4: fixing and connecting the bolt assembly 5. In the preferred embodiment, the locking nut 55 is arranged above the upper end plate of the main cylinder, the bolt head of the fixed main bolt 51 is located below the lower end plate of the main cylinder, and during the specific connection, the fixed main bolt 51 passes through the lower end plate of the main cylinder, the corbel, the upper end plate of the main cylinder and the prefabricated concrete beam 1 in turn from bottom to top, and finally the locking nut 55 is tightened.

[0056] The construction method avoids the secondary concrete grouting on the construction site, and is simple, convenient, fast, safe and reliable.

[0057] It can be understood that the scheme of the present application is dedicated to the beam-column joint of cross shape. For the rear end of the four prefabricated concrete cross beams 1, the connection with other concrete columns, load-bearing walls and the like is designed to be a non-cross joint structure as much as possible, and a conventional bolt is used for fixation. For example, bolt connecting end heads can be respectively arranged on the left side face and the right side face of the rear end of the cross beam body 15. After the four prefabricated concrete cross beams 1 are connected into a whole through the left concrete clamping piece 16 and the right concrete clamping piece 17 as described in step S3, the prefabricated concrete cross beams 1 are lowered to the designed position, and the beam limiting columns at the front end of the four prefabricated concrete cross beams 1 are respectively clamped in the beam limiting blind holes 34. At the same time, the bolt connecting end heads at the rear end of the cross beam body 15 are also lowered into position, and finally the bolt connecting end heads are fixedly connected with the corresponding connection objects (other concrete columns, load-bearing walls) through the cooperation of the bolts, so that the connection is completed.

[0058] In some other preferred embodiments, each beam limiting blind hole 34 can simultaneously allow the beam limiting column and the inner guard plate 46 in the upper cover plate assembly 4 to be clamped in when the prefabricated concrete column 2 is cast and hoisted in step S1, and a limiting column hole 35 for clamping with the cover limiting column 43 in the upper cover plate assembly 4 is arranged in advance on the upper surface of the upper end plate of the main cylinder.

[0059] In step S2, the prefabricated concrete cross beam 1 is cast, and the guard plate notches 19 extending in the vertical direction are reserved on the front end face of the cross beam body 15.

[0060] Step S3, when hoisting the prefabricated concrete cross beam 1, four prefabricated concrete cross beams 1 are connected into a whole through the left concrete clamping piece 16 and the right concrete clamping piece 17, and the whole formed after each left concrete clamping piece 16 and right concrete clamping piece 17 are clamped is a cross beam clamping connection assembly, each cross beam clamping connection assembly is a cuboid structure, and the upper surface of the cross beam clamping connection assembly is flush with the upper surface of the prefabricated concrete cross beam 1, and the lower surface of the cross beam clamping connection assembly is flush with the lower surface of the prefabricated concrete cross beam 1; then an upper cover plate assembly 4 prepared in advance is installed above the upper end plate of the main cylinder, the upper cover plate assembly 4 includes a rectangular top plate 41 and four L-shaped corner guard plates 42, the center of the rectangular top plate 41 is provided with a center column through hole 44, and the rectangular top plate 41 is provided with a bolt hole one 45 corresponding to the consolidation main bolt 51; the L-shaped corner guard plate 42 is a columnar piece with an L-shaped horizontal cross section, the inner corner side of the L-shaped corner guard plate 42 faces the axis of the center column through hole 44 (that is, the outer corner side of the L-shaped corner guard plate 42 faces away from the axis of the center column through hole 44, and in the preferred embodiment, the outer corner side of the L-shaped corner guard plate 42 is flush with the side end surface of the rectangular top plate 41), and the four L-shaped corner guard plates 42 are respectively fixed at the four corners of the outer edge of the lower surface of the rectangular top plate 41, and the lower end surface of each L-shaped corner guard plate 42 is fixedly provided with a cover limiting column 43 with a vertical axis; the upper cover plate assembly 4 includes four inner guard plates 46, which are respectively fixed at the edges of the four sides of the center column through hole 44, and the upper end of the inner guard plate 46 is fixedly connected with the lower surface of the rectangular top plate 41; when the upper cover plate assembly 4 is installed, the center column through hole 44 is sleeved outside the prefabricated concrete column 2, if the steel column sleeve 3 further includes an upper column sleeve 32, the upper cover plate assembly 4 is sleeved outside the upper column sleeve 32 through the center column through hole 44, the lower surface of the rectangular top plate 41 is attached to the upper surface of the prefabricated concrete cross beam 1 or has a set gap; the L-shaped corner guard plate 42 is arranged outside the cross beam clamping connection assembly, and the inner surface of the inner corner side of the L-shaped corner guard plate 42 is attached to the outer side surface of the cross beam clamping connection assembly or has a set gap, the cover limiting column 43 is clamped in the limiting column hole 35, and the inner guard plate 46 is clamped in the guard plate notch 19 of the front end surface of the beam body 15 and inserted into the beam limiting blind hole 34;

[0061] Step S4, when fixing the connecting bolt assembly 5, the rectangular top plate 41, the left concrete clamping piece 16, the right concrete clamping piece 17, the corbel and the steel column sleeve 3 are fixed into a whole through the cooperation of the consolidation main bolt 51 and the locking nut 55.

[0062] Adopting the above preferred scheme, the overall clamping structure of the four prefabricated concrete cross beams 1 is more reliable, and the four prefabricated concrete cross beams 1 can form a larger contact surface with the upper end plate of the main cylinder, and through the clamping between the upper cover plate assembly 4 and the steel column sleeve 3, the connection of the beam column in the horizontal and vertical directions can be limited and protected, further improving the connection strength and stability of the assembled beam column joint of the frame structure of the present application. Through the clamping between the upper cover plate assembly 4 and the steel column sleeve 3, the connection of the beam column in the horizontal and vertical directions can be limited and protected, further improving the connection strength and stability of the assembled beam column joint of the frame structure of the present application. In specific implementation, the vertical length of the guard plate notch 19 is not less than the vertical length of the inner guard plate 46, and the depth of the guard plate notch 19 is slightly smaller than the thickness of the inner guard plate 46, so that the installed cross beam body 15 and the steel column sleeve 3 both extrude the inner guard plate 46 of the upper cover plate assembly 4, so that the upper cover plate assembly 4 will have a certain limiting effect on the cross beam body 15 in the vertical direction, further improving the connection strength and stability of the beam column joint of the present application.

[0063] From the preferred embodiments of the construction method described above, for the fabricated beam-column joint of the frame structure of the present application, the specific structure of some preferred examples is as follows: the whole formed after the engagement of each left concrete engaging piece 16 and right concrete engaging piece 17 is a beam engaging connection assembly, each beam engaging connection assembly is a cuboid structure, and the upper surface of the beam engaging connection assembly is flush with the upper surface of the prefabricated concrete beam 1, and the lower surface of the beam engaging connection assembly is flush with the lower surface of the prefabricated concrete beam 1; the upper region of the main cylinder upper end plate is provided with an upper cover plate assembly 4, the upper cover plate assembly 4 comprises a rectangular top plate 41 and four L-shaped corner guard plates 42; the center of the rectangular top plate 41 is provided with a center column through hole 44, and the rectangular top plate 41 is sleeved outside the upper column sleeve 32 through the center column through hole 44, and the lower surface of the rectangular top plate 41 is flush with or has a set gap with the upper surface of the prefabricated concrete beam 1; the L-shaped corner guard plate 42 is a columnar piece with an L-shaped horizontal cross section, the L-shaped corner guard plate 42 is arranged outside the beam engaging connection assembly, the four L-shaped corner guard plates 42 are respectively fixed at the four corners of the outer edge of the lower surface of the rectangular top plate 41, and the inside corner side of the L-shaped corner guard plate 42 faces the axis of the center column through hole 44, and the inside corner side of the L-shaped corner guard plate 42 is flush with or has a set gap with the outer side of the beam engaging connection assembly; the lower end surface of each L-shaped corner guard plate 42 is fixedly provided with a cover limiting column 43 with an axis vertically arranged, the upper surface of the main cylinder upper end plate is provided with a limiting column hole 35 corresponding to the cover limiting column 43, and the cover limiting column 43 is respectively engaged in the limiting column hole 35; the rectangular top plate 41 is provided with a bolt hole 145 corresponding to the consolidation main bolt 51, and the rectangular top plate 41, the left concrete engaging piece 16, the right concrete engaging piece 17, the corbel and the steel column sleeve 3 are fixed as a whole by the cooperation of the consolidation main bolt 51 and the locking nut 55. The number of cover limiting columns 43 can be reasonably arranged according to actual conditions, generally two cover limiting columns 43 are arranged on the lower end surface of each L-shaped corner guard plate 42, and the two cover limiting columns 43 are located on different sides of the L-shaped corner guard plate 42, and one cover limiting column 43 is arranged on each side.

[0064] In order to further improve the connection strength at the joint, in some preferred embodiments, the upper cover plate assembly 4 comprises four inner guard plates 46, the four inner guard plates 46 are respectively fixed at the edges of the four sides of the center column through hole 44, the upper end of the inner guard plate 46 is fixedly connected with the lower surface of the rectangular top plate 41, and the front end surface of the beam body 15 is provided with a guard plate notch 19 extending in the vertical direction, and the inner guard plate 46 is engaged in the guard plate notch 19 of the front end surface of the beam body 15 and inserted into the beam limiting blind hole 34. That is, in some alternative embodiments, the inner guard plate 46 can be considered not to be arranged according to actual conditions.

[0065] In order to facilitate prefabrication and assembly, and further improve the reliability at the joint, in some preferred embodiments, the lower concrete base 161 is a cuboid structure, and the right end surface thereof is integrated with the left end surface of the beam body 15; the upper concrete abutment 162 is a right-angled quadrangular prism structure, and is arranged at the left rear upper end surface of the lower concrete base 161; and the upper concrete base 171 is a cuboid structure, and the left end surface thereof is integrated with the right end surface of the beam body 15; the upper abutting recess 172 is a right-angled quadrangular prism structure, and is arranged at the right rear of the upper concrete base 171.

[0066] In order to facilitate assembly, in some other preferred embodiments, the contact surface between the outer wall of the upper concrete abutment 162 and the inner wall of the upper abutting recess 172 is arranged in an arc shape.

[0067] In some other preferred embodiments, the above-mentioned preferred modes of the left concrete abutting member 16 and the right concrete abutting member 17 can be combined for use, and the specific structure is as follows: the lower concrete base 161 is a cuboid structure, and the right end surface thereof is integrated with the left end surface of the beam body 15; the upper concrete abutment 162 is a hexahedron structure, and is arranged at the left rear upper end surface of the lower concrete base 161; the lower surface of the upper concrete abutment 162 is integrated with the upper surface of the lower concrete base 161; the upper surface of the upper concrete abutment 162 is arranged horizontally; the two outer side end surfaces of the upper concrete abutment 162 are two vertical planes arranged in an L shape; and the two inner side end surfaces of the upper concrete abutment 162 are first arc surfaces; the upper concrete base 171 is a cuboid structure, and the left end surface thereof is integrated with the right end surface of the beam body 15; the upper abutting recess 172 is an L-shaped structure, and is arranged at the right rear of the upper concrete base 171; the two inner side walls of the upper abutting recess 172 are second arc surfaces; and the first arc surfaces and the second arc surfaces are adapted to each other. In further preferred embodiments, each left concrete abutting member 16 and right concrete abutting member 17 forms a beam abutting connecting assembly after being abutted, each beam abutting connecting assembly is a cuboid structure, the upper surface of the beam abutting connecting assembly is flush with the upper surface of the prefabricated concrete beam 1, and the lower surface of the beam abutting connecting assembly is flush with the lower surface of the prefabricated concrete beam 1.

[0068] In order to further improve the reliability at the joint, in some other preferred embodiments, the left concrete abutting member 16 and the right concrete abutting member 17 are respectively provided with a steel sheath, which can further prevent damage to the prefabricated concrete beam 1 at the stress point, and improve the connection quality of the connection structure. In further preferred embodiments, the steel sheath can wrap and protect the front end of the prefabricated concrete beam 1 as a whole, which can further improve the structural reliability, and facilitate the disassembly and assembly of the formwork during concrete pouring.

[0069] In order to further improve the reliability of the node, in some other preferred embodiments, the bolt assembly 5 further comprises a metal adjusting piece 52, a metal fixing piece 53 and a second connecting bolt 54, the consolidation main bolt 51 is provided with four in a rectangular arrangement, the metal fixing piece 53 is arranged in the lower area of the lower end plate of the main cylinder, the metal fixing piece 53 is provided with four, and the metal fixing piece 53 is fixed at the bottom of the consolidation main bolt 51 one by one in a corresponding manner. In some embodiments, the metal fixing piece 53 can also serve as the bolt head of the consolidation main bolt 51, and in some other embodiments, the consolidation main bolt 51 can also be provided with a bolt head, and the metal fixing piece 53 is fixed relative to the bolt head. The metal adjusting piece 52 and the locking nut 55 are arranged above the prefabricated concrete beam 1, and the metal adjusting piece 52 is arranged between the prefabricated concrete beam 1 and the locking nut 55. The metal adjusting piece 52 is provided with four, and the metal adjusting piece 52 is sleeved on the consolidation main bolt 51 one by one in a corresponding manner. The adjacent two metal fixing pieces 53 and the adjacent two metal adjusting pieces 52 are connected and fixed by the second connecting bolt 54 and the fixed nut. In the above preferred embodiments, the consolidation main bolt 51 can further adopt a high-strength bolt. It can be understood that the above-mentioned "metal adjusting piece 52 and locking nut 55 are arranged above the prefabricated concrete beam 1, and the metal adjusting piece 52 is arranged between the prefabricated concrete beam 1 and the locking nut 55" only refers to the relative position relationship among the metal adjusting piece 52, the locking nut 55 and the prefabricated concrete beam 1. Other components can also be arranged between the prefabricated concrete beam 1 and the locking nut 55 according to the actual situation, such as a gasket. For example, in some preferred embodiments of the present application, an upper cover plate assembly 4 is also arranged, and the metal adjusting piece 52 is actually located on the upper surface of the rectangular top plate 41.

[0070] For the convenience of processing and assembling, and effectively ensuring the structural reliability of the bolt assembly, in some other preferred embodiments, the metal adjusting member 52 and the metal fixing member 53 are of the same structure, and each includes a metal base plate 521, a metal sleeve 522 and two side wing plates 523 which are fixed integrally (preferably by machining) ; the metal base plate 521 is of a fan-shaped structure and is fixed vertically on the outer wall of the metal sleeve 522 (i.e. the axis of the metal sleeve 522 is arranged vertically relative to the two large faces of the metal base plate 521), the two side wing plates 523 are perpendicular to each other and are each fixed on the outer wall of the metal sleeve 522, and one end of each of the two side wing plates 523 is fixed vertically on the metal base plate 521; each of the side wing plates 523 is provided with a connecting bolt hole 524 for cooperating with the second connecting bolt 54, the lower end of the consolidation main bolt 51 is arranged in the metal sleeve 522 of the metal fixing member 53 (i.e. inserted into the sleeve center hole 525) and is welded and fixed, and the metal adjusting member 52 is sleeved on the consolidation main bolt 51 through the metal sleeve 522 thereof. In the specific assembly, the metal adjusting member 52 is locked and fixed by the lock nut 55. In the specific implementation, in the step S4 of fixing the connecting bolt assembly 5, the metal adjusting member 52 is first locked and fixed by the lock nut 55, at this time, the metal adjusting member 52, the metal fixing member 53, the upper cover plate assembly 4, the left concrete clamping member 16, the right concrete clamping member 17, the corbel and the steel column sleeve 3 are fixed integrally; finally, the two adjacent metal fixing members 53 and the two adjacent metal adjusting members 52 are connected and fixed by the second connecting bolt 54 and the cooperating fixing nut, respectively.

[0071] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but that the application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments should, therefore, be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A fabricated beam-column joint of a frame structure, comprising a precast concrete beam (1), a precast concrete column (2), and a bolt assembly (5), four of the precast concrete beams (1) being provided in a cross shape around the precast concrete column (2), characterized in that, The outer wall of the prefabricated concrete column (2) is provided with a corbel arranged in an annular whole, and a steel column sleeve (3) is arranged outside the corbel. The steel column sleeve (3) is pre-welded and assembled outside the steel bars of the prefabricated concrete column (2) and the corbel, and then the steel column sleeve (3), the corbel and the prefabricated concrete column (2) are poured together to form an integral structure. The steel column sleeve (3) at least includes an annular main cylinder (31) located outside the corbel, a main cylinder upper end plate located at the upper end surface of the corbel, and a main cylinder lower end plate located at the lower end surface of the corbel. The main cylinder upper end plate and the main cylinder lower end plate are both arranged horizontally. The front ends of the prefabricated concrete beams (1) are all fixedly connected to the upper surface of the main cylinder upper end plate, and the front ends of the prefabricated concrete beams (1) are all fixedly provided with beam limiting columns. The main cylinder upper end plate is provided with beam limiting blind holes (34) penetrating vertically into the corbel, and the beam limiting columns are respectively clamped in the beam limiting blind holes (34). Each prefabricated concrete beam (1) includes a beam body (15), a left concrete clamping piece (16) and a right concrete clamping piece (17). The left concrete clamping piece (16) and the right concrete clamping piece (17) are respectively arranged at the two sides of the front end of the beam body (15). The left concrete clamping piece (16) of each beam body (15) is clamped with the right concrete clamping piece (17) of the beam body (15) adjacent to the left side thereof. The right concrete clamping piece (17) of each beam body (15) is clamped with the left concrete clamping piece (16) of the prefabricated concrete beam (1) adjacent to the right side thereof. The left concrete clamping piece (16) is composed of a lower concrete base (161) and an upper concrete clamping platform (162). The lower concrete base (161) is arranged at the lower part of the left side end surface of the front end of the prefabricated concrete beam (1), and the upper concrete clamping platform (162) is arranged at the upper end surface of the lower concrete base (161) away from the beam body (15). The right concrete clamping piece (17) includes an upper concrete base (171) arranged at the upper part of the right side end surface of the front end of the prefabricated concrete beam (1). The end of the upper concrete base (171) away from the beam body (15) is provided with an upper clamping notch (172). The lower concrete base (161) and the upper concrete base (171) are mutually superimposed, and the upper concrete clamping platform (162) is clamped in the upper clamping notch (172). The bolt assembly (5) includes a consolidation main bolt (51) and a locking nut (55) connected in cooperation. The axis of the consolidation main bolt (51) is vertically arranged. The connection part of each left concrete clamping piece (16) and right concrete clamping piece (17) is provided with a consolidation main bolt (51). The consolidation main bolt (51) penetrates through the connection part of the left concrete clamping piece (16) and the right concrete clamping piece (17), the main cylinder upper end plate, the corbel and the main cylinder lower end plate, and cooperates with the locking nut (55) to fix the left concrete clamping piece (16), the right concrete clamping piece (17), the corbel and the steel column sleeve (3) into an integral whole.

2. The fabricated beam-column joint of a framed structure according to claim 1, wherein The lower concrete base (161) is a cuboid structure, and its right end surface is integrated with the left end surface of the beam body (15); the upper concrete clamping table (162) is a right-angle quadrangular table structure, and is arranged at the left rear upper end surface of the lower concrete base (161); the upper concrete base (171) is a cuboid structure, and its left end surface is integrated with the right end surface of the beam body (15); and the upper clamping notch (172) is a right-angle quadrangular table structure, and is arranged at the right rear of the upper concrete base (171).

3. The fabricated beam-column joint of a framed structure according to claim 1, wherein The contact surface between the outer wall of the upper concrete clamping table (162) and the inner wall of the upper clamping notch (172) is arc-shaped; and the left concrete clamping piece (16) and the right concrete clamping piece (17) are respectively provided with a steel sheath.

4. The fabricated beam-column joint of a framed structure according to claim 1, wherein The bolt assembly (5) further comprises metal adjusting pieces (52), metal fixing pieces (53) and second connecting bolts (54), the consolidation main bolts (51) are high-strength bolts, four of the consolidation main bolts (51) are arranged in a rectangular manner, the metal fixing pieces (53) are arranged below the lower end plate of the main cylinder body, four of the metal fixing pieces (53) are arranged, and the metal fixing pieces (53) are fixed one by one and correspondingly at the bottom of the consolidation main bolts (51); the metal adjusting pieces (52) and the locking nuts (55) are both arranged above the prefabricated concrete beam (1), the metal adjusting pieces (52) are arranged between the prefabricated concrete beam (1) and the locking nuts (55), four of the metal adjusting pieces (52) are arranged, and the metal adjusting pieces (52) are slidably sleeved one by one and correspondingly on the consolidation main bolts (51); the second connecting bolts (54) are used for connecting and fixing the metal fixing pieces (53) and the metal adjusting pieces (52) which are adjacent to each other.

5. The fabricated beam-column joint of a framed structure according to claim 4, wherein The metal adjusting pieces (52) and the metal fixing pieces (53) are the same in structure, and each comprise a metal base plate (521) fixed as a whole, a metal sleeve (522) and two side wing plates (523); the metal base plate (521) is a fan-shaped structure and is fixed perpendicularly on the outer wall of the metal sleeve (522), the two side wing plates (523) are perpendicular to each other and are both fixed on the outer wall of the metal sleeve (522), and one end of each of the two side wing plates (523) is fixed perpendicularly on the metal base plate (521); each of the side wing plates (523) is provided with a connecting bolt hole (524) used for connecting the second connecting bolt (54); the lower end of the consolidation main bolt (51) is arranged in the metal sleeve (522) of the metal fixing piece (53) and is welded and fixed; and the metal adjusting piece (52) is slidably sleeved on the consolidation main bolt (51) through the metal sleeve (522) thereof.

6. The fabricated beam-column joint of a frame structure according to any one of claims 1 to 5, wherein The annular main cylinder (31), the main cylinder upper end plate and the main cylinder lower end plate are welded and fixed as a whole, the steel column sleeve (3) further comprises an upper column sleeve (32) and a lower column sleeve (33), the upper column sleeve (32) and the lower column sleeve (33) are fixedly sleeved on the outer periphery of the prefabricated concrete stand column (2), the lower end of the upper column sleeve (32) is welded and fixed with the main cylinder upper end plate, and the upper end of the lower column sleeve (33) is welded and fixed with the main cylinder lower end plate; the steel column sleeve (3) is fixed as a whole with the corbels and the steel reinforcement frame arranged in the prefabricated concrete stand column (2); the horizontal cross section of the prefabricated concrete stand column (2) is rectangular, and the outer peripheral surface of the corbel is a conical quadrangular prism surface with the length of the upper end longer than that of the lower end.

7. The fabricated beam-column joint of a framed structure according to claim 6, wherein The whole formed after each left concrete clamping piece (16) and right concrete clamping piece (17) are clamped is a beam clamping connection assembly, each beam clamping connection assembly is a cuboid structure, and the upper surface of the beam clamping connection assembly is flush with the upper surface of the prefabricated concrete beam (1), and the lower surface of the beam clamping connection assembly is flush with the lower surface of the prefabricated concrete beam (1); An upper cover plate assembly (4) is arranged above the main cylinder upper end plate, the upper cover plate assembly (4) comprises a rectangular top plate (41) and four L-shaped corner guard plates (42); a center column through hole (44) is arranged at the center of the rectangular top plate (41), and the rectangular top plate (41) is sleeved outside the upper column sleeve (32) through the center column through hole (44), and the lower surface of the rectangular top plate (41) is attached to the upper surface of the prefabricated concrete beam (1) or has a set gap; the L-shaped corner guard plate (42) is a columnar piece with an L-shaped horizontal cross section, the L-shaped corner guard plate (42) is arranged outside the beam clamping connection assembly, the four L-shaped corner guard plates (42) are respectively fixed at the four corners of the outer edge of the lower surface of the rectangular top plate (41), and the inner surface of the inner corner side of the L-shaped corner guard plate (42) is attached to the outer side surface of the beam clamping connection assembly or has a set gap; an axis vertically arranged cover limiting column (43) is fixedly arranged on the lower end surface of each L-shaped corner guard plate (42), and the upper surface of the main cylinder upper end plate is provided with a limiting column hole (35) corresponding to the cover limiting column (43), and the cover limiting column (43) is clamped in the limiting column hole (35) respectively; the rectangular top plate (41) is provided with a bolt hole (45) corresponding to the consolidation main bolt (51), and the rectangular top plate (41), the left concrete clamping piece (16), the right concrete clamping piece (17), the corbel and the steel column sleeve (3) are fixed as a whole through cooperation of the consolidation main bolt (51) and the locking nut (55).

8. The fabricated beam-column joint of a framed structure according to claim 7, wherein The upper cover plate assembly (4) comprises four inner guards (46) respectively fixed at the edges of the four sides of the center column through hole (44), the upper end of the inner guard (46) is fixedly connected with the lower surface of the rectangular top plate (41), the front end face of the beam body (15) is provided with a guard recess (19) extending in the vertical direction, the inner guard (46) is clamped in the guard recess (19) of the front end face of the beam body (15) and inserted into the beam limiting blind hole (34).

9. A construction method of a fabricated beam-column joint of a frame structure, characterized by, The fabricated beam-column joint of the frame structure according to any one of claims 1 to 6 is implemented and comprises the following steps: Step S1, pouring and hoisting of the prefabricated concrete stand column (2): According to the drawings, the steel bars inside the prefabricated concrete stand column (2) and the bracket are bound, the steel column sleeve (3) is welded and assembled outside the steel bars of the prefabricated concrete stand column (2) and the bracket, finally the concrete formwork is installed and the concrete is poured to form the overall structure of the prefabricated concrete stand column (2), the bracket and the steel column sleeve (3), and the bolt holes corresponding to the beam limiting blind hole (34) and the fixed main bolt (51) are reserved; then the poured prefabricated concrete stand column (2) is hoisted; Step S2, pouring of the prefabricated concrete beam (1): According to the drawings, the steel bars inside the four prefabricated concrete beams (1) are bound, the concrete formwork is installed and the concrete is poured to obtain the four prefabricated concrete beams (1) with left and right concrete clamping members (16) and (17); at the same time, the bolt holes corresponding to the fixed main bolt (51) are reserved; Step S3, hoisting of the prefabricated concrete beam (1): The four prefabricated concrete beams (1) are hoisted to the poured prefabricated concrete stand column (2), the front ends of the four prefabricated concrete beams (1) are arranged in a ring shape above the upper end plate of the main cylinder body with a certain interval, the center lines of the four prefabricated concrete beams (1) are located on the same horizontal plane and arranged in a cross shape; then the four prefabricated concrete beams (1) are rotated at a certain angle along their own center lines, so that the left concrete clamping member (16) on one side of the bottom surface of each prefabricated concrete beam (1) is lower than the right concrete clamping member (17) on the other side; then the four prefabricated concrete beams (1) are moved forward along their own center lines to the designed position; then the four prefabricated concrete beams (1) are rotated synchronously along their own center lines, so that the left and right concrete clamping members (16) and (17) of all the prefabricated concrete beams (1) are gradually clamped in place synchronously; after the four prefabricated concrete beams (1) are connected into a whole through the left and right concrete clamping members (16) and (17), the prefabricated concrete beams (1) are lowered to the designed position, and the beam limiting columns at the front ends of the four prefabricated concrete beams (1) are clamped in the beam limiting blind holes (34); Step S4, fixed connection bolt assembly (5).

10. The construction method of the fabricated beam-column joint of a frame structure according to claim 9, characterized in that, Step S1, when pouring and hoisting the precast concrete column (2), each beam limiting blind hole (34) can simultaneously allow the beam limiting column and the inner guard plate (46) in the upper cover plate assembly (4) to be clamped in, and the limiting column hole (35) for clamping with the cover limiting column (43) in the upper cover plate assembly (4) is arranged on the upper surface of the upper end plate of the main cylinder in advance; Step S2, when pouring the precast concrete cross beam (1), the guard plate notch (19) extending vertically is reserved on the front end surface of the cross beam body (15); Step S3, when hoisting the precast concrete cross beam (1), four precast concrete cross beams (1) are connected into a whole through the left concrete clamping piece (16) and the right concrete clamping piece (17), each left concrete clamping piece (16) and right concrete clamping piece (17) after clamping form a whole, each cross beam clamping connection assembly is a cuboid structure, and the upper surface of the cross beam clamping connection assembly is flush with the upper surface of the precast concrete cross beam (1), and the lower surface of the cross beam clamping connection assembly is flush with the lower surface of the precast concrete cross beam (1); then the precast upper cover plate assembly (4) is installed in the upper region of the main cylinder upper end plate, the upper cover plate assembly (4) includes a rectangular top plate (41) and four L-shaped corner guard plates (42), the center of the rectangular top plate (41) is provided with a center column through hole (44), and the rectangular top plate (41) is provided with a bolt hole one (45) corresponding to the consolidation main bolt (51); the L-shaped corner guard plate (42) is a columnar piece with an L-shaped horizontal cross section, the female corner side of the L-shaped corner guard plate (42) faces the axis of the center column through hole (44), the four L-shaped corner guard plates (42) are respectively fixed at the four corners of the outer edge of the lower surface of the rectangular top plate (41), and the lower end surface of each L-shaped corner guard plate (42) is fixedly provided with a cover limiting column (43) with a vertical axis; the upper cover plate assembly (4) includes four inner guard plates (46), the four inner guard plates (46) are respectively fixed at the edges of the four sides of the center column through hole (44), and the upper end of the inner guard plate (46) is fixedly connected with the lower surface of the rectangular top plate (41); when the upper cover plate assembly (4) is installed, the center column through hole (44) is sleeved outside the precast concrete column (2), if the steel column sleeve (3) further includes an upper column sleeve (32), the upper cover plate assembly (4) is sleeved outside the upper column sleeve (32) through the center column through hole (44), the lower surface of the rectangular top plate (41) is attached to the upper surface of the precast concrete cross beam (1) or has a set gap; the L-shaped corner guard plate (42) is arranged outside the cross beam clamping connection assembly, the inner surface of the female corner side of the L-shaped corner guard plate (42) is attached to the outer side surface of the cross beam clamping connection assembly or has a set gap, the cover limiting column (43) is clamped in the limiting column hole (35), and the inner guard plate (46) is clamped in the guard plate notch (19) of the front end surface of the cross beam body (15) and inserted into the beam limiting blind hole (34). Step S4, when fixing the connecting bolt assembly (5), the rectangular top plate (41), the left concrete engaging member (16), the right concrete engaging member (17), the corbel and the steel column sleeve (3) are fixed as a whole by cooperation of the main bolt (51) and the locking nut (55).

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