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

Abstract

The invention relates to the technical field of connecting joints in common building structures, in particular to a fabricated beam-column joint of a frame structure and a construction method of the fabricated beam-column joint. By means of the prefabricated concrete stand column, the bracket and the steel column sleeve which are integrally formed through pouring, the overall structural strength of the prefabricated concrete stand column, the bracket and the steel column sleeve is improved, and a structural supporting foundation is provided for later installation of the prefabricated concrete cross beam; beam limiting columns arranged at the front ends of the prefabricated concrete cross beams are clamped with beam limiting blind holes formed in the steel column sleeves and the brackets, so that connection and fixation between the beam columns are achieved; meanwhile, the front ends of the four prefabricated concrete cross beams are clamped with one another, so that the four prefabricated concrete cross beams are locked with one another; connection and fixation of the assembly type beam columns can be achieved without opening holes and arranging bolts in the areas where the prefabricated concrete stand columns and the cross beam bodies are located, and the beam columns at the connecting positions are not prone to damage.

Description

Technical Field

[0001] The present invention relates to the technical field of connection nodes in general building structures, and in particular to an assembled beam-column node of a frame structure and a construction method thereof. Background Art

[0002] Prefabricated buildings refer to buildings that transfer a large amount of on-site work in traditional construction methods to factories. Building components and accessories are processed and manufactured in factories, transported to the construction site, and assembled and installed on site through reliable connection methods. The connection structure of beams and columns is an important part of prefabricated buildings.

[0003] Currently, beam-column connections are typically made by drilling holes in the concrete beams and columns and securing them with high-strength bolts. Too few holes and too few bolts result in low joint strength and poor stability. Excessive holes and bolts significantly reduce and damage the structural strength of the concrete beams and columns, posing a significant safety hazard in extreme situations such as later earthquakes.

[0004] In addition, the Chinese patent document with publication number CN113006274A discloses a new type of prefabricated assembled frame structure beam-column dry connection node, including a precast concrete beam, a precast concrete lower column, a precast concrete upper column, a connecting end, a high-strength bolt, and a bracket. The end of the precast concrete beam is provided with a connecting end, the connecting end is provided with a shear key on the side close to the precast 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, and the lower part of the connecting end is provided with a tongue-and-groove seam; brackets are provided on both sides of the reserved concrete lower column, the brackets are provided with bracket reserved holes inside, and the brackets are provided with a tongue-and-groove seam. Second, a limit block is provided on the precast concrete lower column, and a longitudinal reinforcement hole is provided inside the precast concrete lower column. 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 precast concrete upper column is provided with a reserved longitudinal reinforcement, which is inserted into the longitudinal reinforcement reserved hole of the precast concrete lower column, and the precast concrete upper column is provided with a reserved steel sleeve and shear key; the precast concrete upper column and the precast concrete lower column are connected by inserting the precast longitudinal reinforcement into the longitudinal reinforcement reserved hole, and the upper reserved through hole of the connecting end is aligned with the reserved steel sleeve in the column body, and then fixed with high-strength bolts, and a gap is provided between the shear keys, and high-strength concrete slurry is injected into the gap. By reserving vertical steel bars at the connecting end, during the downward movement of the beam, the reserved vertical steel bars are aligned with and passed through the vertical reserved holes of the corbel, and high-strength concrete slurry is injected to achieve primary fixation; by connecting with the column body through the horizontal through hole set at the top of the connecting end, after the primary fixation is completed, the horizontal through hole will be automatically aligned, and the high-strength bolts can be directly inserted and screwed in without tightening, and then high-strength concrete slurry can be injected into the gap to complete the fixation. The shear key between the beam end and the column surface assists the corbel in shear resistance, achieving the purpose of easy construction and installation, good force transmission effect and high node strength. The above scheme still has the following shortcomings: multiple corbels are independently arranged on the outer peripheral side of the reserved concrete lower column, and the corbels lack a protective structure. Each beam is connected to the corbel and the precast concrete upper column by an independently arranged connection structure. There is a lack of positioning connection structure between the beams, and the overall reliability needs to be further improved; although the precast concrete upper column uses a reserved steel sleeve to connect the horizontal high-strength bolts, it is essentially still a reserved opening set in the precast concrete upper column, which will affect the structural strength of the precast concrete column to a certain extent; in addition, there is a grouting operation of high-strength concrete slurry during the construction process, and the dry connection is not fully realized, which also causes a certain degree of inconvenience in construction. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an assembled beam-column node of a frame structure, which can effectively improve the connection strength and reliability of the node while facilitating construction.

[0006] The technical solution adopted by the present invention to solve its technical problem is: an assembled beam-column node of a frame structure, comprising a precast concrete crossbeam, a precast concrete column and a bolt assembly, wherein four precast concrete crossbeams are arranged in a cross shape around the precast concrete column, and a corbel arranged in an annular overall manner is provided on the outer wall of the precast concrete column, and a steel column sleeve is provided on the outer side of the corbel, and the steel column sleeve, the corbel and the precast concrete column are an integral structure cast and fixed together, and the steel column sleeve comprises at least an annular main cylinder body located on the outer side of the corbel, an upper end plate of the main cylinder body located on the upper end face of the corbel, and a main cylinder located on the lower end face of the corbel The lower end plate of the main body, the upper end plate of the main cylinder and the lower end plate of the main cylinder are all arranged horizontally; the front ends of the precast concrete beams are fixedly connected to the upper surface of the upper end plate of the main cylinder, the front ends of the precast concrete beams are fixedly provided with beam limiting columns, and the upper end plate of the main cylinder is provided with beam limiting blind holes that vertically penetrate into the corbels, and the beam limiting columns are respectively engaged in the beam limiting blind holes; each precast concrete beam includes a beam body, a left concrete clamping piece and a right concrete clamping piece, and the left concrete clamping piece and the right concrete clamping piece are respectively arranged on both sides of the front end of the beam body, and the left concrete clamping piece of each beam body is respectively engaged with its The right concrete clamping piece of the adjacent beam body on the left is clamped, and the right concrete clamping piece of each beam body is respectively clamped with the left concrete clamping piece of the precast concrete beam adjacent to its right side; the left concrete clamping piece is composed of a lower concrete base and an upper concrete clamping platform, the lower concrete base is arranged at the lower part of the left end surface of the front end of the precast concrete beam, and the upper concrete clamping platform is arranged at the upper end surface of the left concrete base away from the beam body; the right concrete clamping piece includes an upper concrete base arranged at the upper part of the right end surface of the front end of the precast concrete beam, and an upper concrete base is arranged at one end of the upper concrete base away from the beam body The locking recess; the lower concrete base and the upper concrete base overlap with each other, and the upper concrete base is locked in the upper locking recess; the bolt assembly includes a mating consolidation main bolt and a locking nut, the axes of the consolidation main bolts are arranged vertically, and each connection part of the left concrete clamping part and the right concrete clamping part is provided with a consolidation main bolt, which passes through the connection part of the left concrete clamping part and the right concrete clamping part, the upper end plate of the main cylinder, the bracket and the lower end plate of the main cylinder at the same time, and through the cooperation with the locking nut, the left concrete clamping part, the right concrete clamping part, the bracket and the steel column sleeve are fixed into a whole.

[0007] In order to facilitate prefabrication and assembly, and further improve the reliability of the nodes, the preferred solution is that the lower concrete base is a rectangular structure and its right end face is an integrated structure with the left end face of the beam body, and the upper concrete clamping platform is a right-angled quadrangular pyramid structure and is arranged at the left rear of the upper end face of the lower concrete base; the upper concrete base is a rectangular structure and its left end face is an integrated structure with the right end face of the beam body, and the upper clamping recess is a right-angled quadrangular pyramid structure and is arranged at the right rear of the upper concrete base.

[0008] To facilitate assembly, a preferred solution is that the contact surface between the outer wall of the upper concrete clamping platform and the inner wall of the upper clamping recess is set to be arc-shaped.

[0009] In order to further improve the reliability of the node, the preferred solution is that the left concrete clamping piece and the right concrete clamping piece are respectively equipped with steel sheaths.

[0010] In order to further improve the reliability of the node, the preferred solution is that the bolt assembly also includes a metal adjusting part, a metal fixing part, and a second connecting bolt. The consolidation main bolt is a high-strength bolt. There are four consolidation main bolts arranged in a rectangular shape. The metal fixing part is arranged in the lower area of ​​the lower end plate of the main cylinder. There are four metal fixing parts. The metal fixing parts are fixed one by one at the bottom of the consolidation main bolt. The metal adjusting part and the locking nut are both arranged above the precast concrete beam, and the metal adjusting part is arranged between the precast concrete beam and the locking nut. There are four metal adjusting parts. The metal adjusting parts are slidably mounted on the consolidation main bolt one by one. The two adjacent metal fixing parts and the two adjacent metal adjusting parts are connected and fixed by the second connecting bolt and the fixing nut.

[0011] To facilitate processing and assembly, and effectively ensure the structural reliability of the bolt assembly, the preferred solution is that the metal adjusting part and the metal fixing part have the same structure, both including a metal base plate, a metal sleeve and two side wing plates fixed into a whole; the metal base plate is a fan-shaped structure and is vertically fixed 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 the two side wing plates is vertically fixed on the metal base plate; the side wing plates are provided with connecting bolt holes for matching the connection of the second connecting bolt, the lower end of the consolidation main bolt is provided in the metal sleeve of the metal fixing part and is welded and fixed, and the metal adjusting part is slidably mounted on the consolidation main bolt through its metal sleeve.

[0012] To facilitate prefabrication and further improve the reliability of the nodes, the preferred solution is that 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 into a whole, the steel column sleeve also includes an upper column sleeve and a lower column sleeve, the upper column sleeve and the lower column sleeve are fixedly sleeved on the outer periphery of the precast concrete column, the lower end of the upper column sleeve is welded and fixed to the upper end plate of the main cylinder, and the upper end of the lower column sleeve is welded and fixed to the lower end plate of the main cylinder; the steel column sleeve is fixed to the corbel and the steel frame arranged inside the precast concrete column as a whole; the horizontal cross-section of the precast concrete column is a rectangle, and the outer peripheral surface of the corbel is a conical quadrangular prism surface with the upper end side length being greater than the lower end side length.

[0013] In order to further improve the connection strength at the node and effectively protect the clamping and positioning structure of the four precast concrete beams, the preferred solution is that each left concrete clamping piece is clamped with the right concrete clamping piece to form a beam clamping connection assembly, and each beam clamping connection assembly is a rectangular structure, and the upper surface of the beam clamping connection assembly is flush with the upper surface of the precast concrete beam, and the lower surface of the beam clamping connection assembly is flush with the lower surface of the precast concrete beam; an upper cover plate assembly is installed in the upper area of ​​the upper end plate of the main cylinder, and the upper cover plate assembly includes a rectangular top plate and four L-shaped corner guards; a center column through hole is provided in the center of the rectangular top plate, and is sleeved on the outer side of the upper column sleeve through the center column through hole, and the lower surface of the rectangular top plate is in contact with the upper surface of the precast concrete beam or has a set gap; the L-shaped corner guard The plate is a columnar member with an L-shaped horizontal cross-section. The L-shaped corner guard is arranged on the outside of the cross-beam clamping connection assembly. 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 inner corner side of the L-shaped corner guard faces the axial centerline of the center column through hole. The inner surface of the inner corner side of the L-shaped corner guard is in contact with the outer side surface of the cross-beam clamping connection assembly or has a set gap; a cover limiting column arranged vertically to the axis is fixed on the lower end surface of each L-shaped corner guard, and the upper surface of the upper end plate of the main cylinder is provided with limiting column holes corresponding to the cover limiting columns one by one, and the cover limiting columns are respectively clamped in the limiting column holes; 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 part, the right concrete clamping part, the corbel and the steel column sleeve are fixed into a whole through the cooperation of the consolidation main bolt and the locking nut.

[0014] In order to further improve the connection strength at the node, the preferred solution is that the upper cover plate assembly includes four inner guard plates, and the four inner guard plates are respectively fixed at the edges of the four sides of the center column through hole. The upper ends of the inner guard plates are fixedly connected to the lower surface of the rectangular top plate, and the front end surfaces of the beam body are provided with guard plate recesses extending vertically. The inner guard plates are engaged in the guard plate recesses on the front end surface of the beam body and inserted into the beam limiting blind holes.

[0015] Based on the aforementioned prefabricated beam-column joint of the frame structure, the present invention also provides a construction method of the prefabricated beam-column joint of the frame structure, comprising the following steps: Step S1: Casting and hoisting of precast concrete columns: Tie the steel bars inside the precast concrete columns and corbels according to the drawings, then weld and assemble the steel column sleeves to the outside of the steel bars of the precast concrete columns and corbels. Finally, install the concrete formwork and pour concrete to form the overall structure of the precast concrete columns, corbels, and steel column sleeves. At the same time, reserve the blind holes for beam limiters and the bolt holes corresponding to the main consolidation bolts. Then, hoist the poured precast concrete columns. Step S2, pouring of precast concrete beams: Tie the steel bars inside the four precast concrete beams according to the drawings, then install the concrete formwork and pour concrete to produce four precast concrete beams with left and right concrete clamps. At the same time, reserve the bolt holes corresponding to the main consolidation bolts. Step S3, hoisting of precast concrete beams: The four precast concrete beams are hoisted to the cast precast concrete columns, and the front ends of the four precast concrete beams are placed above the upper end plate of the main cylinder in a circular manner around the precast concrete columns, and the axis lines of the four precast concrete beams are located in the same horizontal plane and are arranged in a cross shape; then the four precast concrete beams are rotated at a certain angle along their own axis lines, so that the side where the left concrete clamping piece of the bottom surface of each precast concrete beam is lower than the side where the right concrete clamping piece is located; then the four precast concrete beams are moved forward to the designed position along their own axis lines; then the four precast concrete beams are rotated synchronously along their own axis lines, so that the left concrete clamping pieces and the right concrete clamping pieces of all precast concrete beams are gradually engaged in place synchronously; after the four precast concrete beams are connected into a whole by the left concrete clamping piece and the right concrete clamping piece, the precast concrete beams are lowered to the designed position, and the beam limiting columns at the front ends of the four precast concrete beams are respectively engaged in the beam limiting blind holes; Step S4, fixing the connecting bolt assembly.

[0016] In order to further enhance the connection strength at the nodes and effectively protect the snap-fit ​​positioning structure of the four precast concrete beams, a preferred solution is that, in step S1, when the precast concrete columns are cast and hoisted, each reserved beam limiting blind hole can simultaneously allow the beam limiting column and the inner guard plate in the upper cover assembly to be snapped in, and a limiting column hole for snapping in with the cover limiting column in the upper cover assembly is provided in advance on the upper surface of the upper end plate of the main cylinder; In step S2, when pouring the precast concrete beam, a vertically extending guard plate recess is reserved on the front end surface of the beam body; In step S3, when the precast concrete beams are hoisted, the four precast concrete beams are connected into a whole through the left concrete clamping piece and the right concrete clamping piece. After each left concrete clamping piece is clamped with the right concrete clamping piece, the whole formed is a beam clamping connection assembly. Each beam clamping connection assembly is a rectangular structure, and the upper surface of the beam clamping connection assembly is flush with the upper surface of the precast concrete beam, and the lower surface of the beam clamping connection assembly is flush with the lower surface of the precast concrete beam; then the prefabricated upper cover plate assembly is installed in the upper area of ​​the upper end plate of the main cylinder body, and the upper cover plate assembly includes 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 corresponding to the consolidation main bolt; the L-shaped corner guard is a columnar member with an L-shaped horizontal cross section, and the inner corner side of the L-shaped corner guard faces the axial line of the center column through hole. The four L-shaped corner guards are respectively fixed on the rectangular top plate. The four corners of the outer edge of the lower surface of the L-shaped top plate are fixedly provided with a cover limit column arranged vertically on the axis at the lower end surface of each L-shaped corner guard plate; the upper cover plate assembly includes four inner guard plates, and the four inner guard plates are fixed at the edges of the four sides of the center column through hole respectively, and the upper end of the inner guard plate is fixedly connected to the lower surface of the rectangular top plate; when the upper cover plate assembly is installed, it is sleeved on the outer side of the precast concrete column through the center column through hole. If the steel column sleeve also includes an upper column sleeve, the upper cover plate assembly is sleeved on the outer side of the upper column sleeve through the center column through hole, and the lower surface of the rectangular top plate is in contact with the upper surface of the precast concrete beam or has a set gap; the L-shaped corner guard plate is arranged on the outer side of the beam clamping connection assembly, and the inner surface of the inner corner side of the L-shaped corner guard plate is in contact with the outer side surface of the beam clamping connection assembly or has a set gap, the cover limit columns are respectively clamped in the limit column holes, and the inner guard plate is clamped in the guard plate recess on the front end surface of the beam body and inserted into the beam limit blind hole; In 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 by cooperating with the consolidation main bolt and the locking nut.

[0017] The beneficial effects of the present invention are: (1) The precast concrete columns, corbels and steel column sleeves are cast in one piece, which improves the overall structural strength of the precast concrete columns, corbels and steel column sleeves, and provides a structural support foundation for the installation of precast concrete beams in the later stage. At the same time, the steel column sleeves can protect the precast concrete columns and corbels, prevent damage to the precast concrete columns and corbels at the stress points, and improve the connection quality of the connection structure.

[0018] (2) The beam limit column provided at the front end of the precast concrete beam is engaged with the beam limit blind hole provided in the steel column sleeve and the corbel, thereby realizing the connection and fixation between the beam and the column; at the same time, the front ends of the four precast concrete beams are respectively placed on the corbels on the four side end faces of the precast concrete column, and the left concrete engaging piece and the right concrete engaging piece of each precast concrete beam are respectively engaged with the right concrete engaging piece of the adjacent precast concrete beam on the left and the left concrete engaging piece of the adjacent precast concrete beam on the right, thereby realizing the mutual locking between the four precast concrete beams.

[0019] (3) The assembled beam-column node of the frame structure described in the present invention has a compact structure. It is possible to connect and fix the assembled beams and columns without drilling holes or setting bolts in the area where the precast concrete columns (excluding the corbels and steel column sleeves) and the beam bodies are located. The beams and columns at the connection are not easily damaged, and have high firmness and stability, and high connection strength.

[0020] (4) The construction method of the present invention avoids secondary grouting of concrete at the construction site, and is simple, convenient, fast, safe and reliable to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the assembled beam-column node of the frame structure of the present invention; Figure 2 for Figure 1 The vertical section view along the AA direction (i.e., the vertical section view through the axis of the precast concrete column, the first axis of the concrete beam, and the third axis of the concrete beam); Figure 3 This is a schematic diagram of the overall structure of the precast concrete column, corbel and steel column sleeve of the present invention; Figure 4 This is a schematic diagram of the overall structure of four precast concrete beams of the present invention after being assembled; Figure 5 for Figure 4 Structural diagram of concrete beam 1 in FIG. Figure 6 for Figure 4 Structural diagram of concrete beam 2; Figure 7 It is a structural schematic diagram of the upper cover assembly of the present invention; Figure 8 It is a structural schematic diagram of the bolt assembly of the present invention; Figure 9 Schematic diagram of the structure of the metal adjusting member (or metal fixing member) of the bolt assembly of the present invention.

[0022] The parts in the figure are marked as: precast concrete beam 1, concrete beam one 11, concrete beam two 12, concrete beam three 13, concrete beam four 14, beam body 15, left concrete clamping piece 16, lower concrete base 161, upper concrete clamping platform 162, right concrete clamping piece 17, upper concrete base 171, upper clamping recess 172, bolt hole two 18, guard plate recess 19, precast 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 adjustment part 52, metal fixing part 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

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] like Figures 1 to 9 As shown, the prefabricated beam-column joint of the frame structure described in the present invention includes a precast concrete beam 1, a precast concrete column 2, and a bolt assembly 5. Four precast concrete beams 1 are arranged in a cross pattern around the precast concrete column 2. The four precast concrete beams 1 are arranged in a cross pattern around the precast concrete column 2, meaning that each precast concrete beam 1 is orthogonal to the precast concrete column 2, and the angle formed by the axes of two adjacent precast concrete beams 1 is 90°. In the embodiment shown in the accompanying drawings, the four precast concrete beams correspond to concrete beam 1 11, concrete beam 2 12, concrete beam 3 13, and concrete beam 4 14. Concrete beam 1 11 and concrete beam 3 13 are coaxially arranged (their axes are set as a first axis), and concrete beam 2 12 and concrete beam 4 14 are coaxially arranged (their axes are set as a second axis). The first and second axes intersect perpendicularly.

[0025] The outer wall of the precast concrete column 2 is provided with a corbel arranged in an annular shape, and a steel column sleeve 3 is provided on the outside of the corbel. The steel column sleeve 3, the corbel and the precast concrete column 2 are an integral structure cast and fixed together. The steel column sleeve 3 at least includes an annular main cylinder 31 located on the outer side of the corbel, an upper end plate of the main cylinder located on the upper end face of the corbel, and a lower end plate of the main cylinder located on the lower end face of the corbel. The upper end plate of the main cylinder and the lower end plate of the main cylinder are both arranged horizontally. The present invention first improves the overall structural strength of the precast concrete column 2, the corbel and the steel column sleeve 3 by integrally casting the precast concrete column 2, the corbel and the steel column sleeve 3, providing a structural support foundation for the subsequent installation of the precast concrete beam 1; at the same time, the steel column sleeve 3 can protect the precast concrete column 2 and the corbel, prevent damage to the precast concrete column 2 and the corbel at the stress point, and improve the connection quality of the connection structure.

[0026] The front ends of the precast concrete beams 1 are fixedly connected to the upper surface of the upper end plate of the main cylinder. The front ends of the precast concrete 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 that vertically penetrate into the corbel. The beam limiting columns are respectively engaged in the beam limiting blind holes 34. Each precast 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 on the beam body 15. On both sides of the front end, the left concrete clamping piece 16 of each beam body 15 is respectively clamped with the right concrete clamping piece 17 of the beam body 15 adjacent to its left side, and the right concrete clamping piece 17 of each beam body 15 is respectively clamped with the left concrete clamping piece 16 of the precast concrete beam 1 adjacent to its right side; 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 end face of the front end of the precast concrete beam 1, and the upper concrete clamping platform 162 is arranged at the lower part of the left end face of the front end of the precast concrete beam 1. The soil clamping platform 162 is arranged on the upper end surface of the left concrete base 161 away from the beam body 15; the right concrete clamping member 17 includes an upper concrete base 171 arranged on the upper right end surface of the front end of the precast concrete beam 1, and an upper clamping recess 172 is provided on the end of the upper concrete base 171 away from the beam body 15; the lower concrete base 161 and the upper concrete base 171 overlap with each other, and the upper concrete clamping platform 162 is clamped in the upper clamping recess 172; the bolt assembly 5 includes a fixed bolt 171 connected in a mating manner. The main bolt 51 and the locking nut 55 are arranged vertically, and the axis of the main bolt 51 is provided with a main bolt 51 at the connection between each left concrete clamp 16 and the right concrete clamp 17. The main bolt 51 passes through the connection between the left concrete clamp 16 and the right concrete clamp 17, the upper end plate of the main cylinder, the bracket and the lower end plate of the main cylinder, and cooperates with the locking nut 55 to fix the left concrete clamp 16, the right concrete clamp 17, the bracket and the steel column sleeve 3 into a whole. It is understandable that the main bolt 51 should meet the design strength requirements. Generally, high-strength bolts are preferably used. "High-strength bolts" is a general term in this field. Bolts made of high-strength steel or bolts that require a large pre-tightening force can be called high-strength bolts. The performance grade of the bolts is usually above grade 8.8. Correspondingly, the area where the corbel and steel column sleeve 3 of the precast concrete column 2 are located is provided with a bolt hole corresponding to the consolidation main bolt 51, and the bolt hole is the bolt hole three 36 shown in the accompanying drawings; each left concrete clamping part 16 and the right concrete clamping part 17 are clamped to form a whole as a beam clamping connection component, and each beam clamping connection component is provided with a bolt hole corresponding to the consolidation main bolt 51, and the bolt hole is the bolt hole two 18 shown in the accompanying drawings, which is equivalent to each left concrete clamping part 16 and the right concrete clamping part 17 being provided with a corresponding bolt hole two 18.

[0027] The present invention achieves a secure connection between the beams and columns by engaging the beam-limiting columns provided at the front ends of the precast concrete beams 1 with the beam-limiting blind holes 34 provided in the steel column sleeves 3 and the corbels. Simultaneously, the front ends of the four precast concrete beams 1 are placed on the corbels on the four side end faces of the precast concrete columns 2. The left and right concrete engaging members 16 and 17 of each precast concrete beam 1 engage with the right and left concrete engaging members 16 of the adjacent precast concrete beam 1 on the left and right, respectively, thereby achieving interlocking between the four precast concrete beams 1. The present invention achieves secure connection between the assembled beams and columns without drilling holes or installing bolts in the areas between the precast concrete columns 2 (excluding the corbels and steel column sleeves 3) and the beam body 15. The beam-column connections at the junctions are less susceptible to damage, offering high firmness, stability, and connection strength.

[0028] To facilitate prefabrication and further improve the reliability of the nodes, in some preferred embodiments, the annular main cylinder 31, the upper end plate of the main cylinder and the lower end plate of the main cylinder are welded and fixed into a whole, and the steel column sleeve 3 also includes an upper column sleeve 32 and a lower column sleeve 33. The upper column sleeve 32 and the lower column sleeve 33 are both fixedly sleeved on the outer periphery of the precast concrete column 2, and the lower end of the upper column sleeve 32 is welded and fixed to the upper end plate of the main cylinder, and the upper end of the lower column sleeve 33 is welded and fixed to the lower end plate of the main cylinder; the steel column sleeve 3 is fixed to the corbel and the steel frame arranged inside the precast concrete column 2 as a whole; the horizontal cross-section of the precast concrete column 2 is a rectangle, and the outer peripheral surface of the corbel is a conical quadrangular prism surface with an upper side length greater than a lower side length, which is equivalent to the annular main cylinder 31 being a quadrangular pyramidal cylinder structure with an upper inner diameter greater than a lower inner diameter.

[0029] When the above-mentioned assembled beam-column joint of the frame structure is specifically implemented, the corresponding construction method includes the following steps: Step S1, pouring and hoisting of precast concrete columns 2: According to the drawings, the steel bars inside the precast concrete column 2 and the bracket are tied, and the steel column sleeve 3 is then welded and assembled to the outside of the steel bars of the precast concrete column 2 and the bracket. Finally, the concrete formwork is installed and concrete is poured to form the overall structure of the precast concrete column 2, the bracket, and the steel column sleeve 3. At the same time, the beam limit blind hole 34 and the bolt hole corresponding to the consolidation main bolt 51 (i.e., bolt hole 36) are reserved. The poured precast concrete column 2 is then hoisted. Step S2, pouring of precast concrete beam 1: Tie the steel bars inside the four precast concrete beams 1 according to the drawings, then install the concrete formwork and pour concrete to produce four precast concrete beams 1 with left and right concrete fasteners 16 and 17. At the same time, reserve bolt holes (i.e., bolt holes 18) corresponding to the main consolidation bolts 51. Step S3, hoisting of precast concrete beam 1: The four precast concrete beams 1 are hoisted to the poured precast concrete columns 2, and the front ends of the four precast concrete beams 1 are placed above the upper end plate of the main cylinder in a ring-shaped manner around the precast concrete columns 2. The axis lines of the four precast concrete beams 1 are located in the same horizontal plane and are arranged in a cross shape (there is no specific requirement for the initial state of the bottom surfaces of the four precast concrete beams 1. In order to facilitate the synchronous control of the rotation angle, the preferred method is usually that the bottom surfaces of the four precast concrete beams 1 are all arranged horizontally); then the four precast concrete beams 1 are rotated along their own axis by a certain angle, so that the side where the left concrete clamping piece 16 of the bottom surface of each precast concrete beam 1 is lower than the side where the right concrete clamping piece 17 is located (the specific rotation angle can be reasonably designed based on the principle that the four precast concrete beams 1 behind are moved forward to the designed position along their own axis); If the bottom surfaces of the four precast concrete beams 1 are all arranged horizontally, the left concrete clamping pieces 16 and the right concrete clamping pieces 17 of two adjacent precast concrete beams 1 will interfere with each other and cannot be assembled. Therefore, they need to be rotated at a certain angle along their own axis to provide installation space for subsequent clamping assembly); then the four precast concrete beams 1 are moved forward along their own axis to the designed position; then the four precast concrete beams 1 are rotated synchronously along their own axis, so that the left concrete clamping pieces 16 and the right concrete clamping pieces 17 of all the precast concrete beams 1 are gradually clamped into place synchronously; after the four precast concrete beams 1 are clamped and connected into a whole by the left concrete clamping piece 16 and the right concrete clamping piece 17, the precast concrete beams 1 are lowered to the designed position, and the beam limiting columns at the front ends of the four precast concrete beams 1 are respectively clamped in the beam limiting blind holes 34; Step S4, fix the connecting bolt assembly 5. In a preferred embodiment, the locking nut 55 is set above the upper end plate of the main cylinder, and the bolt head of the main consolidation bolt 51 is located below the lower end plate of the main cylinder. When connecting, the main consolidation bolt 51 passes through the lower end plate of the main cylinder, the bracket, the upper end plate of the main cylinder and the precast concrete beam 1 from bottom to top, and finally the locking nut 55 is tightened.

[0030] The construction method of the present invention avoids secondary grouting of concrete at the construction site, and is simple, convenient, fast, safe and reliable to operate.

[0031] It is understandable that the solution of the present invention is specifically designed for cross-shaped beam-column nodes. For the rear ends of the four precast concrete beams 1, the connection points with other concrete columns, load-bearing walls, etc., try to adopt a non-cross-shaped node structure design and use conventional bolts to fix. For example, bolt connection ends can be fixed on the left and right sides of the rear end of the beam body 15, respectively. After the four precast concrete 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 precast concrete beams 1 are lowered to the designed position, and the beam limit columns at the front ends of the four precast concrete beams 1 are respectively engaged in the beam limit blind holes 34; at the same time, the bolt connection ends at the rear end of the beam body 15 are also lowered into place, and finally fixedly connected to the corresponding connection objects (other concrete columns, load-bearing walls) through the bolt connection ends and the bolts.

[0032] In other preferred embodiments, during the pouring and hoisting of the precast concrete columns 2 in step S1, each of the reserved beam limiting blind holes 34 can simultaneously allow the beam limiting columns and the inner guard plate 46 in the upper cover assembly 4 to be engaged therewith, and limiting column holes 35 for engaging with the cover limiting columns 43 in the upper cover assembly 4 are provided in advance on the upper surface of the upper end plate of the main cylinder; Step S2: When pouring the precast concrete beam 1, a vertically extending guard plate recess 19 is reserved on the front end surface of the beam body 15; Step S3: When the precast concrete beams 1 are hoisted, the four precast concrete beams 1 are connected into a whole through the left concrete clamping piece 16 and the right concrete clamping piece 17. The whole formed by the clamping of each left concrete clamping piece 16 and the right concrete clamping piece 17 is a beam clamping connection assembly. Each beam clamping connection assembly is a rectangular parallelepiped structure, and the upper surface of the beam clamping connection assembly is flush with the upper surface of the precast concrete beam 1, and the lower surface of the beam clamping connection assembly is flush with the lower surface of the precast concrete beam 1; then install the precast concrete beam 1 in the upper area of ​​the upper end plate of the main cylinder. Install the prefabricated upper cover assembly 4, which includes a rectangular top plate 41 and four L-shaped corner guards 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 45 corresponding to the consolidation main bolt 51; the L-shaped corner guard 42 is a columnar member with an L-shaped horizontal cross-section, and the inner corner side of the L-shaped corner guard 42 faces the axis of the center column through hole 44 (that is, the outer corner side of the L-shaped corner guard 42 faces away from the axis of the center column through hole 44. In a preferred embodiment, the outer surface of the outer corner side of the L-shaped corner guard 42 is aligned with the rectangular The side end surfaces of the rectangular top plate 41 are flush with each other), 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 a cover limit column 43 arranged vertically along the axis is fixed on the lower end surface of each L-shaped corner guard plate 42; 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 ends of the inner guard plates 46 are fixedly connected to the lower surface of the rectangular top plate 41; when the upper cover plate assembly 4 is installed, it is sleeved on the outer side of the precast concrete column 2 through the center column through hole 44. If the steel column sleeve 3 also includes After the upper column sleeve 32 is enclosed, the upper cover plate assembly 4 is sleeved on the outer side of the upper column sleeve 32 through the center column through hole 44, and the lower surface of the rectangular top plate 41 is in contact with the upper surface of the precast concrete beam 1 or has a set gap; the L-shaped corner guard plate 42 is arranged on the outer side of the beam clamping connection assembly, and the inner surface of the inner corner side of the L-shaped corner guard plate 42 is in contact with the outer side surface of the beam clamping connection assembly or has a set gap, the cover limit columns 43 are respectively engaged in the limit column holes 35, and the inner guard plate 46 is engaged in the guard plate recess 19 on the front end surface of the beam body 15 and inserted into the beam limit blind hole 34; In 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 by cooperating with the consolidation main bolt 51 and the locking nut 55.

[0033] After adopting the above preferred solution, the overall snap-fit ​​structure of the four precast concrete beams 1 is more reliable, and the four precast concrete beams 1 can form a larger contact surface with the upper end plate of the main cylinder. At the same time, the snap-fit ​​between the upper cover assembly 4 and the steel column sleeve 3 can limit the connection of the beam and column in the horizontal and vertical directions, further improving the connection strength and stability of the assembled beam-column node of the frame-type structure of the present invention. The snap-fit ​​between the upper cover assembly 4 and the steel column sleeve 3 can limit the connection of the beam and column in the horizontal and vertical directions, further improving the connection strength and stability of the assembled beam-column node of the frame-type structure of the present invention. In specific implementation, the vertical length of the guard plate recess 19 is not less than the vertical length of the inner guard plate 46, and the depth of the guard plate recess 19 is slightly less than the thickness of the inner guard plate 46. Therefore, the installed beam body 15 and the steel column sleeve 3 both squeeze the inner guard plate 46 of the upper cover assembly 4, so that the upper cover assembly 4 will have a certain limit effect on the beam body 15 in the vertical direction, further improving the connection strength and stability of the beam-column node of the present invention.

[0034] It can be seen from the preferred embodiments of the above-mentioned construction method that for the assembled beam-column nodes of the frame structure described in the present invention, the specific structures of some preferred examples are as follows: each left concrete clamping piece 16 and the right concrete clamping piece 17 are clamped to form a whole as a beam clamping connection assembly, and each beam clamping connection assembly is a rectangular structure, and the upper surface of the beam clamping connection assembly is flush with the upper surface of the precast concrete beam 1, and the lower surface of the beam clamping connection assembly is flush with the lower surface of the precast concrete beam 1; an upper cover plate assembly 4 is installed in the upper area of ​​the upper end plate of the main cylinder, and the upper cover plate assembly 4 includes a rectangular top plate 41 and four L-shaped corner guard plates 42; a center column through hole 44 is provided in the center of the rectangular top plate 41, and is sleeved on the outer side of the upper column sleeve 32 through the center column through hole 44, and the lower surface of the rectangular top plate 41 is in contact with the upper surface of the precast concrete beam 1 or has a set gap; the L-shaped corner guard plate 42 is horizontal The cross-section of the column is L-shaped, and the L-shaped corner guard plate 42 is arranged on the outside of the cross-beam clamping connection component. 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 corner side of the L-shaped corner guard plate 42 faces the axis of the central column through hole 44. The inner surface of the inner corner side of the L-shaped corner guard plate 42 is in contact with the outer side surface of the cross-beam clamping connection component or has a set gap; an axis is fixed on the lower end surface of each L-shaped corner guard plate 42. The upper surface of the upper end plate of the main cylinder is provided with limit column holes 35 corresponding to the limit column holes 43, and the limit column holes 35 are respectively engaged with the limit column holes 35; the rectangular top plate 41 is provided with bolt holes 45 corresponding to the main consolidation bolts 51. The main consolidation bolts 51 and the locking nuts 55 cooperate to fix the rectangular top plate 41, the left concrete clamping piece 16, the right concrete clamping piece 17, the bracket and the steel column sleeve 3 into a whole. The number of limit column 43 can be reasonably set according to actual conditions. Generally, two limit column 43 are set on the lower end surface of each L-shaped corner guard 42. The two limit column 43 are located on different sides of the L-shaped corner guard 42, and one limit column 43 is set on each side.

[0035] To further enhance the connection strength at the joints, in certain preferred embodiments, the upper cover assembly 4 includes four inner guard plates 46, which are fixed to the edges of the four sides of the center column through-hole 44, respectively. The upper ends of the inner guard plates 46 are fixedly connected to the lower surface of the rectangular top plate 41. The front end surface of the crossbeam body 15 is provided with a vertically extending guard plate recess 19. The inner guard plates 46 engage within the guard plate recess 19 on the front end surface of the crossbeam body 15 and are inserted into the beam-limiting blind hole 34. This means that in certain alternative embodiments, the inner guard plates 46 may be omitted depending on actual circumstances.

[0036] To facilitate prefabrication and assembly, and to further improve the reliability of the nodes, in some preferred embodiments, the lower concrete base 161 is a rectangular parallelepiped structure and its right end face is an integral structure with the left end face of the beam body 15, the upper concrete clamping platform 162 is a right-angled quadrangular pyramid structure and is arranged at the left rear of the upper end face of the lower concrete base 161; the upper concrete base 171 is a rectangular parallelepiped structure and its left end face is an integral structure with the right end face of the beam body 15, the upper clamping recess 172 is a right-angled quadrangular pyramid structure and is arranged at the right rear of the upper concrete base 171.

[0037] To facilitate assembly, in some other preferred embodiments, the contact surface between the outer wall of the upper concrete clamping platform 162 and the inner wall of the upper clamping recess 172 is configured to be arc-shaped.

[0038] In some other preferred embodiments, the preferred embodiments of the left concrete engaging member 16 and the right concrete engaging member 17 can also be combined and used. The specific structure is as follows: the lower concrete base 161 is a rectangular parallelepiped structure and its right end face is an integral structure with the left end face of the beam body 15; the upper concrete clamping platform 162 is a hexahedron structure and is arranged at the left rear of the upper end face of the lower concrete base 161; the lower surface of the upper concrete clamping platform 162 is an integral structure with the upper surface of the lower concrete base 161; the upper concrete clamping platform 162 is a hexahedron structure and is arranged at the left rear of the upper end face of the lower concrete base 161; the lower surface of the upper concrete clamping platform 162 is an integral structure with the upper surface of the lower concrete base 161. The upper surface of the upper concrete bracket 162 is horizontally disposed. The two outer side end surfaces of the upper concrete bracket 162 are two vertical planes arranged in an L-shape, and the two inner side end surfaces of the upper concrete bracket 162 are first curved surfaces. The upper concrete base 171 is a rectangular parallelepiped structure, and its left end surface is integrally formed with the right end surface of the crossbeam body 15. The upper engaging recess 172 is an L-shaped structure and is located at the right rear of the upper concrete base 171. The two inner side walls of the upper engaging recess 172 are second curved surfaces, and the first and second curved surfaces are mutually adapted. In a further preferred embodiment, each left concrete engaging member 16 and the right concrete engaging member 17, when engaged, form a crossbeam engaging assembly. Each crossbeam engaging assembly is a rectangular parallelepiped structure, and its upper surface is flush with the upper surface of the precast concrete crossbeam 1, and its lower surface is flush with the lower surface of the precast concrete crossbeam 1.

[0039] To further enhance the reliability of the joints, in other preferred embodiments, the left and right concrete engaging members 16, 17 are each equipped with a steel sheath. This further prevents damage to the precast concrete beam 1 at the stress points and improves the quality of the connection structure. In further preferred embodiments, the steel sheath can completely encase the front end of the precast concrete beam 1, further enhancing structural reliability and facilitating assembly and disassembly of the formwork during concrete pouring.

[0040] In order to further improve the reliability of the node, in some other preferred embodiments, the bolt assembly 5 further includes a metal adjusting member 52, a metal fixing member 53 and a second connecting bolt 54. The consolidation main bolt 51 is provided with four metal fixing members 53 arranged in a rectangular shape. The metal fixing members 53 are provided in the lower area of ​​the lower end plate of the main cylinder. There are four metal fixing members 53, and the metal fixing members 53 are fixed one by one to the bottom of the consolidation main bolt 51. In some embodiments, the metal fixing members 53 can also serve as the bolt head of the consolidation main bolt 51. In other embodiments, the consolidation main bolt The bolt 51 may also have its own 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 both arranged above the precast concrete beam 1, and the metal adjusting piece 52 is arranged between the precast concrete beam 1 and the locking nut 55. There are four metal adjusting pieces 52, which are slidably mounted on the consolidation main bolt 51 one by one. 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 fixing nut. In the above preferred embodiment, the consolidation main bolt 51 can further adopt a high-strength bolt. It can be understood that the above-mentioned "the metal adjusting part 52 and the locking nut 55 are both arranged above the precast concrete beam 1, and the metal adjusting part 52 is arranged between the precast concrete beam 1 and the locking nut 55" only refers to the relative positional relationship between the metal adjusting part 52, the locking nut 55 and the precast concrete beam 1. Other components, such as gaskets, can be arranged between the precast concrete beam 1 and the locking nut 55 according to actual conditions; for example, in some preferred embodiments of the present invention, an upper cover plate assembly 4 is also provided, and the metal adjusting part 52 is actually located on the upper surface of the rectangular top plate 41.

[0041] To facilitate processing and assembly and effectively ensure the structural reliability of the bolt assembly, in other preferred embodiments, the metal adjusting member 52 and the metal fixing member 53 have the same structure, both comprising a metal base plate 521, a metal sleeve 522, and two side wing plates 523 fixed into an integral whole (preferably formed as a whole through machining); the metal base plate 521 is a fan-shaped structure and is vertically fixed to the outer wall of the metal sleeve 522 (that is, the axis of the metal sleeve 522 is perpendicular to the two large surfaces of the metal base plate 521). The two side wing plates 523 are perpendicular to each other and fixed to the outer wall of the metal sleeve 522. One end of each side wing plate 523 is perpendicularly fixed to the metal base plate 521. Each side wing plate 523 is provided with a connecting bolt hole 524 for connecting with the second connecting bolt 54. The lower end of the main consolidation bolt 51 is set in the metal sleeve 522 of the metal fixing member 53 (i.e., inserted into the sleeve's center hole 525) and fixed by welding. The metal adjustment member 52 is slidably mounted on the main consolidation bolt 51 through its metal sleeve 522. During assembly, the metal adjustment member 52 is locked and fixed with a lock nut 55. During specific implementation, in step S4, when fixing the connecting bolt assembly 5, the metal adjusting part 52 is first locked and fixed using the locking nut 55. At this time, the metal adjusting part 52, the metal fixing part 53, the upper cover assembly 4, the left concrete clamping part 16, the right concrete clamping part 17, the corbel and the steel column sleeve 3 are fixed into a whole; finally, the two adjacent metal fixing parts 53 and the two adjacent metal adjusting parts 52 are respectively connected and fixed by the second connecting bolt 54 and the fixing nut.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. An assembled beam-column node of a frame structure, comprising a precast concrete cross beam (1), a precast concrete column (2) and a bolt assembly (5), wherein four precast concrete cross beams (1) are arranged in a cross shape around the precast concrete column (2), and characterized in that: A corbel arranged in an annular shape is provided on the outer wall of the precast concrete column (2), and a steel column sleeve (3) is provided on the outer side of the corbel. The steel column sleeve (3), the corbel and the precast concrete column (2) are an integral structure cast and fixed together. The steel column sleeve (3) comprises at least an annular main cylinder (31) located on the outer side of the corbel, an upper end plate of the main cylinder located on the upper end face of the corbel, and a lower end plate of the main cylinder located on the lower end face of the corbel; the upper end plate of the main cylinder and the lower end plate of the main cylinder are both arranged horizontally. The front ends of the precast 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 precast 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) vertically penetrating into the corbels, and the beam limiting columns are respectively engaged in the beam limiting blind holes (34); Each precast concrete crossbeam (1) comprises a crossbeam body (15), a left concrete engaging member (16) and a right concrete engaging member (17). The left concrete engaging member (16) and the right concrete engaging member (17) are respectively arranged on both sides of the front end of the crossbeam body (15). The left concrete engaging member (16) of each crossbeam body (15) is respectively engaged with the right concrete engaging member (17) of the crossbeam body (15) adjacent to the left side thereof, and the right concrete engaging member (17) of each crossbeam body (15) is respectively engaged with the left concrete engaging member (16) of the precast concrete crossbeam (1) adjacent to the right side thereof. The left concrete engaging member (16) is composed of a lower concrete base (161) and an upper concrete base (162). The precast concrete beam (1) is composed of a lower concrete base (161) provided at the lower portion of the left end surface of the front end of the precast concrete beam (1), and an upper concrete base (162) provided at the upper end surface of the left concrete base (161) away from the beam body (15); a right concrete engaging member (17) includes an upper concrete base (171) provided at the upper portion of the right end surface of the front end of the precast concrete beam (1), and an upper engaging recess (172) is provided at one end of the upper concrete base (171) away from the beam body (15); the lower concrete base (161) and the upper concrete base (171) are superimposed on each other, and the upper concrete base (162) is engaged in the upper engaging recess (172); The bolt assembly (5) includes a main consolidation bolt (51) and a locking nut (55) that are matched and connected. The axis of the main consolidation bolt (51) is set vertically. The connection part of each left concrete clamping part (16) and right concrete clamping part (17) is provided with a main consolidation bolt (51). The main consolidation bolt (51) passes through the connection part of the left concrete clamping part (16) and the right concrete clamping part (17), the upper end plate of the main cylinder, the bracket and the lower end plate of the main cylinder at the same time, and through the cooperation with the locking nut (55), the left concrete clamping part (16), the right concrete clamping part (17), the bracket and the steel column sleeve (3) are fixed into a whole.

2. The assembled beam-column node of the frame structure according to claim 1, characterized in that: The lower concrete base (161) is a rectangular parallelepiped structure, and its right end face is an integral structure with the left end face of the beam body (15); the upper concrete clamping platform (162) is a right-angled quadrangular pyramid structure and is arranged at the left rear of the upper end face of the lower concrete base (161); the upper concrete base (171) is a rectangular parallelepiped structure, and its left end face is an integral structure with the right end face of the beam body (15); the upper clamping recess (172) is a right-angled quadrangular pyramid structure and is arranged at the right rear of the upper concrete base (171).

3. The assembled beam-column node of the frame structure according to claim 1, characterized in that: The contact surface between the outer wall of the upper concrete clamping platform (162) and the inner wall of the upper clamping recess (172) is arranged in an arc shape; the left concrete clamping piece (16) and the right concrete clamping piece (17) are respectively provided with a steel sheath.

4. The assembled beam-column node of the frame structure according to claim 1, characterized in that: The bolt assembly (5) further includes a metal adjusting member (52), a metal fixing member (53) and a second connecting bolt (54). The consolidation main bolt (51) is a high-strength bolt. The consolidation main bolt (51) is provided with four metal fixing members arranged in a rectangular shape. The metal fixing member (53) is provided in the lower area of ​​the lower end plate of the main cylinder. Four metal fixing members (53) are provided. The metal fixing members (53) are fixed to the bottom of the consolidation main bolt (51) in a one-to-one manner. The metal adjusting member (52) and the locking nut (55) are both provided above the precast concrete beam (1), and the metal adjusting member (52) is provided between the precast concrete beam (1) and the locking nut (55). Four metal adjusting members (52) are provided. The metal adjusting members (52) are slidably sleeved on the consolidation main bolt (51) in a one-to-one manner. The adjacent two metal fixing members (53) and the adjacent two metal adjusting members (52) are connected and fixed by the second connecting bolt (54) in combination with the fixing nut.

5. The assembled beam-column node of the frame structure according to claim 4, characterized in that: The metal adjusting member (52) and the metal fixing member (53) have the same structure, and both include a metal base plate (521), a metal sleeve (522), and two side wing plates (523) fixed into an integral body; the metal base plate (521) is a fan-shaped structure and is vertically fixed to the outer wall of the metal sleeve (522); the two side wing plates (523) are perpendicular to each other and are both fixed to the outer wall of the metal sleeve (522), and one end of the two side wing plates (523) is vertically fixed to the metal base plate (521); the side wing plates (523) are each provided with a connecting bolt hole (524) for matching the connection 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) and is welded and fixed; the metal adjusting member (52) is slidably sleeved on the consolidation main bolt (51) through its metal sleeve (522).

6. The assembled beam-column node of the frame structure according to any one of claims 1 to 5, characterized in that: The annular main cylinder (31), the main cylinder upper end plate and the main cylinder lower end plate are welded and fixed to form 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 both fixedly sleeved on the outer periphery of the precast concrete column (2). The lower end of the upper column sleeve (32) is welded and fixed to the upper end plate of the main cylinder, and the upper end of the lower column sleeve (33) is welded and fixed to the lower end plate of the main cylinder. The steel column sleeve (3) is fixed to the bracket and the steel frame arranged inside the precast concrete column (2) to form a whole. The horizontal cross-section of the precast concrete column (2) is rectangular, and the outer peripheral surface of the bracket is a tapered quadrangular prism surface with an upper side length greater than a lower side length.

7. The assembled beam-column node of the frame structure according to claim 6, characterized in that: The entire structure formed by the engagement of each left concrete engaging member (16) and the right concrete engaging member (17) is a beam engaging connection assembly, each beam engaging connection assembly is a rectangular parallelepiped structure, and the upper surface of the beam engaging connection assembly is flush with the upper surface of the precast concrete beam (1), and the lower surface of the beam engaging connection assembly is flush with the lower surface of the precast concrete beam (1); An upper cover plate assembly (4) is installed in the upper region of the upper end plate of the main cylinder, and the upper cover plate assembly (4) includes a rectangular top plate (41) and four L-shaped corner guard plates (42); a central column through hole (44) is provided at the center of the rectangular top plate (41), and the rectangular top plate (41) is sleeved on the outer side of the upper column sleeve (32) through the central column through hole (44), and the lower surface of the rectangular top plate (41) is in contact with the upper surface of the precast concrete beam (1) or has a set gap; the L-shaped corner guard plate (42) is a columnar member with an L-shaped horizontal cross section, and the L-shaped corner guard plate (42) is arranged on the outer side of the beam clamping connection assembly, 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 inner corner side of the L-shaped corner guard plate (42) faces the central column through hole (4 4), the inner surface of the inner corner side of the L-shaped corner guard (42) is in contact with the outer side surface of the crossbeam clamping connection assembly or has a set gap; a cover limiting column (43) is fixedly provided on the lower end surface of each L-shaped corner guard (42) and is vertically arranged in the axis direction; the upper surface of the upper end plate of the main cylinder is provided with limiting column holes (35) corresponding to the cover limiting columns (43) one by one, and the cover limiting columns (43) are respectively clamped in the limiting column holes (35); the rectangular top plate (41) is provided with a bolt hole (45) corresponding to the main consolidation bolt (51), and the rectangular top plate (41), the left concrete clamping piece (16), the right concrete clamping piece (17), the bracket and the steel column sleeve (3) are fixed into a whole by the cooperation of the main consolidation bolt (51) and the locking nut (55).

8. The assembled beam-column node of the frame structure according to claim 7, characterized in that: The upper cover assembly (4) includes four inner guard plates (46), which are respectively fixed at the edges of the four sides of the central column through hole (44), and the upper ends of the inner guard plates (46) are fixedly connected to the lower surface of the rectangular top plate (41). The front end surface of the beam body (15) is provided with a guard plate recess (19) extending vertically. The inner guard plates (46) are engaged in the guard plate recess (19) on the front end surface of the beam body (15) and inserted into the beam limit blind hole (34).

9. A construction method for an assembled beam-column node of a frame structure, characterized in that: The prefabricated beam-column node 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 precast concrete columns (2): According to the drawings, the steel bars inside the precast concrete column (2) and the bracket are tied, and then the steel column sleeve (3) is welded and assembled on the outside of the steel bars of the precast concrete column (2) and the bracket. Finally, the concrete formwork is installed and concrete is poured to form the overall structure of the precast concrete column (2), the bracket and the steel column sleeve (3). At the same time, the bolt holes corresponding to the beam limit blind holes (34) and the consolidation main bolts (51) are reserved. Then, the poured precast concrete column (2) is hoisted; Step S2, pouring of precast concrete beams (1): According to the drawings, the steel bars inside the four precast concrete beams (1) are tied, and then the concrete formwork is installed and concrete is poured to obtain four precast concrete beams (1) with left concrete clamping parts (16) and right concrete clamping parts (17). At the same time, bolt holes corresponding to the main consolidation bolts (51) are reserved. Step S3, hoisting of precast concrete beam (1): The four precast concrete beams (1) are hoisted to the cast precast concrete columns (2), and the front ends of the four precast concrete beams (1) are placed above the upper end plate of the main cylinder in a circular manner around the precast concrete columns (2). The axis lines of the four precast concrete beams (1) are located in the same horizontal plane and are arranged in a cross shape. Then, the four precast concrete beams (1) are rotated along their own axis lines at a certain angle so that the side where the left concrete engaging piece (16) is located on the bottom surface of each precast concrete beam (1) is lower than the side where the right concrete engaging piece (17) is located. Then, the four precast concrete beams (1) are rotated along their own axis lines at a certain angle so that the side where the left concrete engaging piece (16) is located on the bottom surface of each precast concrete beam (1) is lower than the side where the right concrete engaging piece (17) is located. The concrete beams (1) are respectively moved forward along their own axis to the designed position; then the four precast concrete beams (1) are respectively rotated along their own axis, so that the left concrete engaging pieces (16) and the right concrete engaging pieces (17) of all the precast concrete beams (1) are gradually engaged in place synchronously; after the four precast concrete beams (1) are engaged and connected into a whole through the left concrete engaging piece (16) and the right concrete engaging piece (17), the precast concrete beams (1) are lowered to the designed position, and the beam limiting columns at the front ends of the four precast concrete beams (1) are respectively engaged in the beam limiting blind holes (34); Step S4, fixing the connecting bolt assembly (5).

10. The construction method of the assembled beam-column node of the frame structure according to claim 9, characterized in that: Step S1: When pouring and hoisting the precast concrete column (2), each reserved 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, and a limiting column hole (35) for clamping with the cover limiting column (43) in the upper cover plate assembly (4) is provided in advance on the upper surface of the upper end plate of the main cylinder; In step S2, when the precast concrete beam (1) is cast, a vertically extending guard plate recess (19) is reserved on the front end surface of the beam body (15); Step S3: When the precast concrete beam (1) is hoisted, the four precast concrete beams (1) are connected to form a whole through the left concrete clamping piece (16) and the right concrete clamping piece (17). The whole formed by the clamping of each left concrete clamping piece (16) and the right concrete clamping piece (17) is a beam clamping connection assembly. Each beam clamping connection assembly is a rectangular parallelepiped structure, and the upper surface of the beam clamping connection assembly is flush with the upper surface of the precast concrete beam (1), and the lower surface of the beam clamping connection assembly is flush with the lower surface of the precast concrete beam (1); then, the main cylinder is fixed with the main cylinder. A prefabricated upper cover assembly (4) is installed in the upper area of ​​the upper end plate. The upper cover assembly (4) includes a rectangular top plate (41) and four L-shaped corner guards (42). A central column through hole (44) is provided at the center of the rectangular top plate (41). A bolt hole (45) corresponding to the main consolidation bolt (51) is provided on the rectangular top plate (41). The L-shaped corner guard (42) is a columnar member with an L-shaped horizontal cross section. The inner corner side of the L-shaped corner guard (42) faces the axis of the central column through hole (44). The four L-shaped corner guards (42) are respectively fixed to the outer sides of the lower surface of the rectangular top plate (41). At the four corners of the edge, a cover limit column (43) arranged vertically in the axis is fixed on the lower end surface of each L-shaped corner guard plate (42); the upper cover plate assembly (4) includes four inner guard plates (46), and the four inner guard plates (46) are respectively fixed at the edges of the four sides of the central column through hole (44), and the upper ends of the inner guard plates (46) are fixedly connected to the lower surface of the rectangular top plate (41); when the upper cover plate assembly (4) is installed, it is sleeved on the outer side of the precast concrete column (2) through the central column through hole (44). If the steel column sleeve (3) also includes an upper column sleeve (32), the upper cover plate assembly (4) is installed through the central column through hole (44). The center column through hole (44) is sleeved on the outside of the upper column sleeve (32), and the lower surface of the rectangular top plate (41) is in contact with the upper surface of the precast concrete beam (1) or has a set gap; the L-shaped corner guard plate (42) is arranged on the outside of the beam clamping connection component, and the inner surface of the inner corner side of the L-shaped corner guard plate (42) is in contact with the outer side surface of the beam clamping connection component or has a set gap; the cover limit columns (43) are respectively engaged in the limit column holes (35); the inner guard plate (46) is engaged in the guard plate recess (19) on the front end surface of the beam body (15) and inserted into the beam limit blind hole (34); In 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 bracket and the steel column sleeve (3) are fixed into a whole by cooperating with the consolidation main bolt (51) and the locking nut (55).

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