Fabricated steel reinforced concrete combined beam-column joint and assembling method thereof

Abstract

The invention provides an assembly type steel reinforced concrete combined beam column joint and an assembly method thereof, and belongs to the technical field of assembly type buildings. According to the joint, double positioning and fastening of the steel reinforced concrete beam are achieved through an integrated tying piece and the like, firstly, a pre-tightening bolt is matched with a positioned stress plate, the steel reinforced concrete beam is tied to abut against a concrete column to be positioned, and preliminary alignment is completed; then the tie bolts are screwed to drive the clamping plates to clamp the horizontal end of the I-shaped steel beam pre-buried in the steel reinforced concrete beam, and complete positioning of the steel reinforced concrete beam is achieved; clamping of the horizontal end of the I-shaped steel beam is achieved by means of prestress pulling of the steel reinforced concrete beam and the concrete column and cooperation of the pulling bolts and the clamping plates, a cooperative stress system is formed, the concrete column, the joint connecting column and the steel reinforced concrete beam form a stable stress whole, stress of the beam-column joint is effectively dispersed, and the construction quality is improved. The tensile property, the shear resistance and the sliding resistance of the joint are greatly improved, and the stress requirement of a large-span and high-load building structure can be met.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, and in particular to a prefabricated steel-concrete composite beam-column joint and its assembly method. Background Technology

[0002] Steel-concrete composite structures combine the excellent tensile and shear strength of steel with the good compressive strength of concrete, making them a widely used structural form in modern construction engineering. As the core load-bearing component of steel-concrete composite structures, the reliability of beam-column connections directly determines the stability, safety, and durability of the overall building structure. Currently, the construction methods for beam-column connections in steel-concrete composite structures are mainly divided into two categories: on-site wet connections and traditional dry connections.

[0003] On-site wet connection requires aligning the steel beams and columns on-site, tying the reinforcement in the joint area, erecting formwork, and pouring concrete. This construction method is characterized by cumbersome on-site procedures, long operation cycle, and high labor costs. Furthermore, the concrete needs to undergo a curing period after pouring, significantly extending the overall construction period. Therefore, dry connection methods are more commonly used in the construction of steel-concrete composite beam-column joints.

[0004] Traditional dry connections mostly use welding to fix steel beams and column connectors. Although this simplifies the on-site construction process to some extent, it still has obvious shortcomings. Welded connections are irreversible, and when the building is maintained, renovated or demolished later, it is impossible to achieve non-destructive disassembly and reuse of each component, which easily leads to material waste and contradicts the development concept of green building.

[0005] To address the aforementioned technical problems, this invention has developed a prefabricated steel-concrete composite beam-column joint and its assembly method that features standardized construction process, high connection stability, and non-destructive disassembly and reuse, thereby overcoming the technical deficiencies of existing connection methods and adapting to the construction needs of prefabricated buildings. Summary of the Invention

[0006] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a prefabricated steel-concrete composite beam-column joint and its assembly method.

[0007] The technical solution of this invention to solve the technical problem is as follows: a prefabricated steel-concrete composite beam-column joint is proposed, including a joint connecting column that is detachably connected between two concrete columns. The joint connecting column is circumferentially detachably connected to a steel-concrete beam. An I-beam is pre-embedded in the steel-concrete beam. The joint connecting column includes a column body. First flanges are fixed on the upper and lower sides of the column body and abut against the second flanges of the adjacent concrete column. It also includes several integrated tie members located on the side of the column. Each integrated tie member includes several internally threaded cylinders corresponding to the holes inserted into the first flange edge and the second flange edge. Each internally threaded cylinder has a limiting cylinder and a tie bolt fixed inside. There are insertion ports between the internally threaded cylinders. A clamping plate is provided on the side of the first flange edge away from the integrated tie member. After the tie bolts pass through the internally threaded cylinders, they are threadedly connected to the clamping plate to drive the clamping plate to move towards the internally threaded cylinders and clamp. The steel-concrete beam has a fixed connecting edge on its side. When the connecting edge abuts against the outer side of the second flange edge, the horizontal end of the I-beam is inserted between the first flange edge and the clamping plate. After the pre-tightening bolts pass through the connecting edge and the insertion port in sequence, they are threadedly connected to the stress plate positioned inside the integrated tie member, thereby tightening the steel-concrete beam and the concrete column. The tie bolts are threadedly connected to the clamping plate, clamping and positioning the horizontal end of the I-beam between the first flange edge and the clamping plate, thus realizing the positioning connection between the I-beam and the node connecting column.

[0008] Preferably, the outer ring of the internally threaded cylinder is fixedly connected with an anti-detachment ring, which abuts against the second flange. At least two sets of vertically distributed connecting plates are connected together among the internally threaded cylinders. Several reinforcing blocks are fixed at intervals between the upper and lower adjacent connecting plates, and the insertion port is formed between the spaced reinforcing blocks.

[0009] Preferably, a limiting block is fixedly connected to the inner side of the reinforcing block, and an insertion cavity for placing and positioning the stress plate is formed between the two limiting blocks.

[0010] Preferably, a clamping threaded cylinder or a clamping nut is fixedly connected to the bottom of the clamping plate; the tie bolt passes through the clamping plate and is threadedly connected to the clamping threaded cylinder or clamping nut to drive the clamping plate to move towards the internal threaded cylinder for clamping.

[0011] Preferably, a plurality of first clearance openings are provided on the horizontal end of the I-beam placed outside the steel-concrete composite beam, and the first clearance openings correspond to the positions of the tie bolts; second clearance openings are provided on the upper and lower sides of the vertical end of the I-beam to avoid interference with the clamping plate.

[0012] Preferably, the main body has two sets of spaced positioning blocks fixed on its side, and the positioning blocks have several sets of first through holes; a second through hole is provided on the vertical end of the I-beam placed outside the steel-concrete beam, and after the vertical end of the I-beam is inserted between the two positioning blocks, the second through hole communicates with the first through hole; it also includes anchor bolts, and the anchor bolts pass through the first through hole and the second through hole and are threaded with anchor nuts.

[0013] Preferably, a flange is fixedly connected to the side of the second flange away from the clamping plate, and a through hole is opened on the side wall of the flange for the pre-tightening bolt to pass freely through; an internal threaded hole is opened above the flange and the connecting edge, and a cover plate is connected above the flange and the connecting edge. The other end of the cover plate abuts against the side wall of the concrete column, and after several positioning bolts pass through the cover plate, they are threadedly connected to the corresponding internal threaded holes, so that the cover plate is fixed at intervals above the second flange edge.

[0014] Preferably, a groove is provided on the inner side of the horizontal end of the I-beam placed outside the steel-concrete beam, and a protrusion is fixedly connected to the inner side of the clamping plate. When the clamping plate abuts against the horizontal end of the I-beam, the groove and the protrusion are matched and inserted.

[0015] This invention also proposes an assembly method for prefabricated steel-concrete composite beam-column joints, employing any of the above-mentioned prefabricated steel-concrete composite beam-column joints, comprising the following steps: S1: Hoist the node connecting column into place between the upper and lower adjacent concrete columns, and align the first flange edge on the upper and lower sides with the second flange edge at the end of the concrete column. S2: Install the integrated tie rod above the second flange edge, so that the internal threaded cylinder passes through the corresponding holes of the first and second flange edges until the anti-loosening ring of the outer ring of the internal threaded cylinder abuts against the upper surface of the second flange; then insert the tie bolt from the inside of the internal threaded cylinder, and initially screw the clamping threaded cylinder or clamping nut on the clamping plate at the bottom, so that a pre-reserved gap is maintained between the clamping plate and the first flange edge, in preparation for the insertion of the I-beam; S3: Hoist the steel-concrete beam to the node position, adjust its posture so that the vertical end of the embedded I-beam is inserted between the two positioning blocks on the side of the node connecting column, and at the same time, the horizontal end of the I-beam is inserted into the reserved gap between the first flange and the clamping plate. S4: Insert a stress plate into the cavity between the two limiting blocks of the integrated tie member, ensuring that it is placed between the outer wall of the concrete column and the tie member; pass the pre-tightening bolts through the through holes of the connecting edge and the protruding edge of the steel-concrete beam and the insertion port of the tie member in sequence, and connect them with the inner stress plate by thread to realize the pre-stressed tie-locking of the steel-concrete beam and the concrete column, while tightening and aligning the second through hole at the vertical end of the I-beam with the first through hole of the positioning block; S5: Tighten each tie bolt simultaneously or in stages. Under the constraint of the limiting cylinder, drive the clamping plate to move towards the internal threaded cylinder, gradually clamping the horizontal end of the I-beam until the clamping plate and the first flange firmly clamp it. S6: Pass the anchor bolts through the first through hole of the positioning block and the second through hole of the vertical end of the I-beam in sequence, screw the anchor nut into the other end and tighten it, and anchor the vertical end of the I-beam to the side of the node connecting column. S7: Place the cover plate over the second flange edge, with one end abutting against the side wall of the concrete column and the other end covering both the connecting edge and the flange; use locking bolts to pass through the cover plate and connect it to the internal threaded holes above the connecting edge and the flange to fix the cover plate to hide and protect the internal connecting parts.

[0016] S8: Check the tightness of the connections of all flange edges, connecting edges, stress plates and I-beams, and verify the preload and torque values ​​of the bolts to ensure they meet the design and specification requirements.

[0017] Compared with existing technologies, the above technical solution has the following advantages or beneficial effects: 1. The core components of this invention, such as the node connecting column, integrated tie member, and steel-concrete beam, are all prefabricated in the factory according to standardization. On-site construction adopts a completely dry assembly method, eliminating the need for on-site welding, rebar tying, concrete pouring, and curing, which greatly simplifies the on-site construction process. Moreover, the structural design of each component has the function of alignment constraint, avoiding secondary processing on-site. Combined with the standardized assembly process, it effectively shortens the construction cycle of beam-column joints and reduces on-site labor costs, so as to meet the construction needs of prefabricated building industrialization and modularization.

[0018] 2. This invention achieves prestressed connection between steel-concrete beams and concrete columns through the cooperation of pre-tightening bolts and stress plates, rigid clamping of the horizontal ends of the I-beams through the cooperation of tie bolts and clamping plates, and firm anchoring of the vertical ends of the I-beams through anchor bolts. The triple connection structure forms a synergistic force-bearing system, making the concrete columns, node connecting columns, and steel-concrete beams a stable force-bearing whole, effectively dispersing the stress of the beam-column joints, avoiding local stress concentration, and significantly improving the tensile, shear, and slip resistance of the joints, which can meet the force requirements of large-span, high-load building structures.

[0019] 3. The integrated tie member proposed in this invention is a modular integrated structure that can simultaneously realize three major functions: clamping and positioning of the first flange edge and the second flange edge, tying and tightening of the steel-concrete beam, and installation and support of the tie bolts. It replaces the traditional decentralized connector design, greatly simplifies the overall structure of the node, reduces the number of on-site connectors, further improves on-site construction efficiency, and reduces the processing and transportation costs of components. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0021] Figure 1 This is a three-dimensional structural diagram of the concrete column in this invention, which is connected to steel-concrete composite beams circumferentially via nodes.

[0022] Figure 2This is a three-dimensional structural diagram of a concrete column connected to a steel-concrete beam on one side in this invention.

[0023] Figure 3 This is an exploded structural diagram of the concrete column, the node connecting column, and the steel-concrete composite structure in this invention.

[0024] Figure 4 This is a three-dimensional structural diagram of the steel-concrete composite beam and its exposed internal I-beams in this invention.

[0025] Figure 5 This is a schematic diagram of the internal structure of the steel-concrete composite beam installed in the concrete column using an integrated tie rod. Figure 1 .

[0026] Figure 6 This is a schematic diagram of the internal structure of the steel-concrete composite beam installed in the concrete column using an integrated tie rod. Figure 2 .

[0027] Figure 7 This is a schematic diagram of the structural distribution of the integrated tie member, the clamping plate, and the I-beams between them in this invention.

[0028] Figure 8 This is a schematic diagram of the assembly structure between the integrated tie member and the clamping plate in this invention.

[0029] Explanation of markings in the diagram: a- Concrete column; a1, Second flange edge; a2, Raised flange; b. Node connecting post; b1. First flange edge; b2. Positioning block; c. Steel-concrete composite beam; c1. I-beam; c2. First clearance opening; c3. Second clearance opening; c4. Connecting edge; 1. Internal threaded cylinder; 2. Connecting plate; 3. Reinforcing block; 4. Limiting block; 5. Insertion port; 6. Positioning bolt; 7. Limiting cylinder; 8. Tie bolt; 9. Anti-detachment ring; 10. Clamping plate; 11. Clamping threaded cylinder or clamping nut; 12. Preload bolt; 13. Stress plate; 14. Anchor bolt; 15. Cover plate; 16. Protrusion. Detailed Implementation

[0030] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0031] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0032] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] like Figures 1 to 8 As shown in the figure, this embodiment proposes a prefabricated steel-concrete composite beam-column joint, which includes a node connecting column b detachably connected between two concrete columns a. The four sides of the node connecting column b are detachably connected to a steel-concrete beam c. An I-beam c1 is pre-embedded inside the steel-concrete beam c. The horizontal and vertical ends of the I-beam c1 extend to the outside of the steel-concrete beam c, providing a rigid support foundation for the connection of the beam-column joint. The steel-concrete beam c is formed by concrete casting, combining the compressive strength of concrete and the tensile strength of I-beam, thereby improving the overall structural strength of the beam-column joint.

[0035] In this embodiment, the node connecting column b includes a vertically arranged column body. Both the upper and lower sides of the column body are integrally formed with rectangular first flange edges b1. The end of the concrete column a facing the node connecting column b is fixed with a second flange edge a1 that matches the first flange edge b1. The first flange edge b1 and the second flange edge a1 fit against each other, realizing the initial docking and positioning of the node connecting column b and the concrete column a. Several integral tie members are also provided on the side of the column body. The integral tie members are the core connecting components of the beam-column node. They include several vertically arranged internal threaded cylinders 1. The internal threaded cylinders 1 are inserted into the holes pre-drilled in the first flange edge b1 and the second flange edge a1, realizing the initial assembly of the integral tie members and the flange edges. The internal threaded cylinders 1 are fixed with limit cylinders 7 inside, and tie bolts 8 are connected inside the internal threaded cylinders 1. The limit cylinders 7 can form a vertical limit block for the movement of the tie bolts 8. The internal threaded cylinders 1 are reserved with insertion ports 5 to provide insertion space for the subsequent assembly of the pre-tightening bolts 12.

[0036] A clamping plate 10 is provided on the side of the first flange away from the integrated tie member along b1. Several tie bolts 8 are threaded to the clamping plate 10 after passing through the internal threaded cylinder 1 at their ends away from the internal threaded cylinder 1. When the tie bolts 8 are tightened, the clamping plate 10 is driven to move toward the internal threaded cylinder 1 under the limiting action of the limiting cylinder 7, thereby realizing the clamping action of the clamping plate 10.

[0037] A connecting edge c4 is integrally formed on the side of the steel-concrete beam c facing the concrete column a. When the end face of the connecting edge c4 abuts against the outer wall of the second flange edge a1, the horizontal end of the I-beam c1 embedded in the steel-concrete beam c can be inserted into the gap between the first flange edge b1 and the clamping plate 10. In this embodiment, the pre-tightening bolt 12 passes through the connecting edge c4 and the insertion port 5 of the integral tie member in sequence, and is threadedly connected to the stress plate 13 positioned inside the integral tie member. Tightening the pre-tightening bolt 12 can tighten the steel-concrete beam c and the concrete column a. After the steel-concrete beam c is initially positioned, the tie bolt 8 is tightened to keep it threaded with the clamping plate 10, which can clamp and position the horizontal end of the I-beam c1 between the first flange edge b1 and the clamping plate 10, and finally achieve a firm positioning connection between the I-beam c1 and the node connecting column b.

[0038] The core of this embodiment lies in achieving dual positioning and fastening for the steel-concrete beam c. First, the initial connection and tightening between the steel-concrete beam c and the concrete column a is achieved through the cooperation of the pre-tightening bolt 12 and the stress plate 13: the stress plate 13 is pre-inserted into the gap between the integrated tie member and the concrete column a and is positioned. During the tightening of the pre-tightening bolt 12, since the stress plate 13 is positioned and cannot move, and the integrated tie member forms a blocking interference with the pre-tightening bolt 12, the pre-tightening bolt 12 will drive the connecting edge c4 and the steel-concrete beam c towards the concrete column a during rotation, until the connecting edge c4 is completely pressed against the side of the second flange edge a1, completing the initial tightening and positioning of the steel-concrete beam c. This step achieves the overall initial alignment of the beam-column joint and ensures the accuracy of the connection.

[0039] After the steel-concrete beam c is initially tightened and positioned, the horizontal end of the I-beam c1 embedded inside it is precisely inserted into the reserved gap between the first flange b1 and the clamping plate 10. Then, the tie bolt 8 in the inner threaded cylinder 1 is screwed on. During the rotation, the tie bolt 8 is limited and blocked by the limiting cylinder 7, which in turn drives the clamping plate 10 to move towards the inner threaded cylinder until the clamping plate 10 tightly clamps and positions the horizontal end of the I-beam c1 between the first flange b1 and the clamping plate 10, thus completing the complete positioning of the steel-concrete beam c and realizing a stable rigid connection between the concrete column a and the steel-concrete beam c. On the other hand, when the internal threaded cylinder 1 is clamped with the clamping plate 10, the clamping force generated can also clamp and position the first flange edge b1 and the second flange edge a1 in sync. At this time, the internal threaded cylinder 1 can be used directly to replace the conventional bolts to achieve the connection and positioning of the first flange edge b1 and the second flange edge a1. A small number of conventional bolts can also be used to assist in fixing, so as to further improve the stability of the connection between the two, reduce the number of conventional bolts used, and simplify the assembly process.

[0040] refer to Figure 8 Furthermore, the outer ring of the internal threaded cylinder 1 is fixedly connected with an anti-disengagement ring 9. When the internal threaded cylinder 1 is inserted into the hole of the first flange edge b1 and the second flange edge a1, the anti-disengagement ring 9 abuts against the upper surface of the second flange edge a1, which can block the inserted internal threaded cylinder 1 and prevent the internal threaded cylinder 1 from going too far downward, thereby causing positional interference with the horizontal end of the I-beam c1 that is about to be inserted. This ensures that the horizontal end of the I-beam c1 can be smoothly inserted between the first flange edge b1 and the clamping plate 10, improving the smoothness of assembly.

[0041] At least two sets of vertically distributed connecting plates 2 are welded and fixed together among several internally threaded cylinders 1. Several reinforcing blocks 3 are fixed at intervals between adjacent connecting plates 2. Both the connecting plates 2 and the reinforcing blocks 3 can be made of high-strength steel. The interlocking openings 5 ​​formed between the left and right spaced reinforcing blocks 3 provide a channel for the pre-tightening bolts 12 to pass through. The connecting plates 2 can connect several internally threaded cylinders 1 into a whole, improving the overall structural stability of the integrated tie member. The reinforcing blocks 3 can further increase the overall tensile strength of the integrated tie member, avoiding problems such as bending and deformation of the integrated tie member due to excessive force during the connection process of the pre-tightening bolts 12 and stress plates 13, ensuring the smooth progress of the connection action and improving the connection reliability of the beam-column joint.

[0042] A limiting block 4 is fixedly connected to the inner side of the reinforcing block 3 facing the stress plate 13. The aforementioned insertion cavity is formed between the two opposing limiting blocks 4, and the stress plate 13 is appropriately placed and positioned within this insertion cavity. The design of the limiting block 4 can constrain the position and shape of the pressure plate, so that during the threaded connection between the pre-tightening bolt 12 and the stress plate 13, the stress plate 13 can always maintain a fixed shape and position, preventing it from rotating synchronously with the pre-tightening bolt 12. This ensures that the tightening and tying action of the pre-tightening bolt 12 can be effectively transmitted to the steel-concrete beam c, ensuring the initial tying and positioning effect.

[0043] refer to Figure 6 or Figure 7In this embodiment, a clamping threaded cylinder or clamping nut 11 is fixedly connected to the bottom of the clamping plate 10. The end of the tie bolt 8 away from the inner threaded cylinder 1 passes through the clamping plate 10 and is threadedly connected to the clamping threaded cylinder or clamping nut 11. This matching method can ensure that the clamping plate 10 can move stably towards the inner threaded cylinder 1 during the rotation of the tie bolt 8, thereby realizing the clamping and positioning of the horizontal end of the I-beam.

[0044] It is worth noting that during the tightening of the tie bolts 8, several tie bolts 8 inside the internal threaded cylinders 1 can be rotated synchronously using a special tightening device, or the tie bolts 8 can be rotated sequentially by a small feed. As long as the clamping plate 10 can move upward smoothly and clamp the horizontal end of the I-beam, it can be adapted to different construction equipment and construction scenarios, thus improving the flexibility of operation.

[0045] refer to Figure 4 In some embodiments, several first clearance openings c2 are provided on the horizontal end of the I-beam c1 located outside the steel-concrete composite beam c. The positions of the first clearance openings c2 correspond to the positions of the tie bolts 8. In this embodiment, to enhance the tie strength of the integrated tie member, three sets of internal threaded cylinders 1 are provided. The design of the first clearance openings c2 can avoid structural interference between the middle position of the horizontal end of the I-beam c1 and the tie bolts 8, ensuring that the clamping plate 10 can move smoothly and clamp the horizontal end of the I-beam. In other embodiments, if the internal threaded cylinders 1 are only provided on both sides, the first clearance openings c2 are not required, and the design can be flexibly adjusted according to actual structural requirements.

[0046] Furthermore, the vertical ends of the I-beam c1 are provided with second clearance openings c3 on the upper and lower sides, which can prevent structural interference between the vertical section of the I-beam c1 and the clamping plate 10 during the feeding process towards the node connecting column b, ensuring that the I-beam c1 can be accurately inserted into the preset position, and improving the accuracy and smoothness of assembly.

[0047] refer to Figure 3In this embodiment, two sets of spaced positioning blocks b2 are fixed to the side of the column. The two sets of positioning blocks b2 are vertically parallel and have several sets of first through holes along the horizontal direction. The vertical end of the I-beam c1, which is placed outside the steel-concrete beam c, has a second through hole that matches the first through hole. When the vertical end of the I-beam c1 is inserted into the gap between the two positioning blocks b2, the second through hole and the first through hole are exactly connected to each other. This embodiment also includes an anchor bolt 14. After the anchor bolt 14 passes through the first through hole and the second through hole in sequence, its end is threaded with an anchor nut. Tightening the anchor nut can firmly connect the vertical end of the I-beam c1 to the positioning block b2. This design can further improve the connection stability between the steel-concrete beam c and the node connecting column b. The outer sides of both positioning blocks b2 are open. After the steel-concrete beam c and the node connecting column b are initially connected, the operator can easily insert the anchor bolts 14 and complete the positioning without any other obstructions, which can improve the construction and assembly efficiency.

[0048] Continue to refer to Figure 3 In this embodiment, the second flange has an integrally formed flange a2 on the side of a1 away from the clamping plate 10. The side wall of the flange a2 has a through hole for the pre-tightening bolt 12 to pass through freely. The pre-tightening bolt 12 can pass through the through hole to achieve threaded engagement with the stress plate 13. The flange a2 and the connecting edge c4 are both provided with internal threaded holes. A cover plate 15 is placed on the flange a2 and the connecting edge c4. The other end of the cover plate 15 abuts against the side wall of the concrete column a. In this embodiment, several positioning bolts 6 pass through the cover plate 15 and are threadedly connected to the corresponding internal threaded holes to fix the cover plate 15 at intervals above the second flange a1.

[0049] The design of the cover plate 15 can, on the one hand, achieve connection stability between the convex edge a2 and the connecting edge c4, so that the two can form an integral load-bearing structure with the help of the cover plate 15, thereby improving the overall structural strength; on the other hand, the cover plate 15 can protect the connecting components such as the integrated tie member and pre-tightening bolt 12 above the connecting edge c4 and the second flange edge a1, avoid damage caused by external collisions and other interference, and extend the service life of the integrated tie member.

[0050] In this embodiment, a groove is provided on the inner side of the horizontal end of the I-beam c1, which is placed outside the steel-concrete composite beam c. A protrusion 16, which matches the groove, is fixedly connected to the inner side of the clamping plate 10 facing the I-beam c1. When the clamping plate 10 moves towards the internal threaded cylinder 1 and abuts against the horizontal end of the I-beam c1, the groove and the protrusion 16 fit together perfectly. This design enables the clamping plate 10 to be fitted and positioned with the horizontal end of the I-beam c1. During the clamping process, the insertion and engagement of the protrusion 16 and the groove can effectively limit the displacement of the horizontal end of the I-beam c1, further improving the stability of the I-beam c1 after installation and ensuring the connection rigidity and stability of the beam-column joint.

[0051] The prefabricated steel-concrete composite beam-column joint in this embodiment adopts a fully prefabricated design. All connecting components are detachable bolted connections, eliminating the need for on-site welding and facilitating construction and assembly, which can significantly improve the construction efficiency of the beam-column joint. At the same time, through multiple designs such as dual positioning and fastening, interlocking positioning, and auxiliary anchoring, a firm connection between the concrete column a and the steel-concrete beam c is achieved, ensuring the structural strength and stability of the beam-column joint. Moreover, each component is modularly designed, which can reduce manufacturing costs and is applicable to most steel-concrete beam-column connection scenarios in building engineering.

[0052] This embodiment also proposes an assembly method for prefabricated steel-concrete composite beam-column joints, which uses the aforementioned prefabricated steel-concrete composite beam-column joints and includes the following steps: S1: Hoist the node connecting column b into place between the two adjacent concrete columns a, and align the first flanges on both sides along b1 with the second flanges at the end of the concrete column a along a1. S2: Install the integrated tie rod above the second flange a1, so that the internal threaded cylinder 1 passes through the corresponding holes of the first flange b1 and the second flange a1 until the anti-loosening ring 9 of the outer ring of the internal threaded cylinder 1 abuts against the upper surface of the second flange; then insert the tie bolt 8 from the inside of the internal threaded cylinder 1, and initially screw the clamping threaded cylinder or clamping nut 11 on the clamping plate 10 at the bottom, so that the clamping plate 10 and the first flange b1 are kept in a reserved gap, in preparation for the insertion of the I-beam c1; S3: Hoist the steel-concrete beam c to the node position, adjust its posture, so that the vertical end of the embedded I-beam c1 is inserted between the two positioning blocks b2 on the side of the node connecting column b, and at the same time, the horizontal end of the I-beam c1 is inserted into the reserved gap between the first flange b1 and the clamping plate 10. S4: Insert the stress plate 13 into the cavity between the two limiting blocks 4 of the integrated tie member, ensuring that it is placed between the outer wall of the concrete column a and the tie member; pass the pre-tightening bolt 12 through the through hole of the connecting edge c4, the protruding edge a2 and the tie member insertion port 5 of the steel-concrete beam c in sequence, and thread it with the inner stress plate 13 to realize the pre-stressed tie-locking of the steel-concrete beam c and the concrete column a, while tightening and aligning the second through hole at the vertical end of the I-beam c1 with the first through hole of the positioning block b2; S5: Tighten each tie bolt 8 synchronously or in stages. Under the constraint of the limiting cylinder 7, drive the clamping plate 10 to move toward the internal thread cylinder 1, and gradually clamp the horizontal end of the I-beam c1 until the clamping plate 10 and the first flange firmly clamp it along b1. S6: Pass the anchor bolt 14 through the first through hole of the positioning block b2 and the second through hole of the vertical end of the I-beam c1 in sequence, screw the anchor nut into the other end and tighten it, and anchor the vertical end of the I-beam c1 to the side of the node connecting column b. S7: Cover the cover plate 15 over the second flange a1, with one end abutting against the side wall of the concrete column a, and the other end covering the connecting edge c4 and the upper part of the flange a2; use positioning bolts 6 to pass through the cover plate 15 and connect to the internal threaded holes above the connecting edge c4 and the flange a2 to fix the cover plate 15 to hide and protect the internal connecting parts.

[0053] S8: Check the tightness of the connections of each flange edge, connection edge c4, stress plate 13 and I-beam c1, and verify the preload and torque values ​​of the bolts to ensure that they meet the design and specification requirements.

[0054] Although the specific embodiments of the invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the invention. Based on the technical solutions of the invention, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the invention.

Claims

1. A prefabricated steel-concrete composite beam-column joint, comprising a node connecting column (b) detachably connected between two concrete columns (a), wherein a steel-concrete beam (c) is circumferentially detachably connected to the node connecting column (b), and an I-beam (c1) is pre-embedded within the steel-concrete beam (c), characterized in that: The node connecting column (b) includes a column body, with a first flange edge (b1) fixed on the upper and lower sides of the column body, and abutting against the second flange edge (a1) of the adjacent concrete column (a). It also includes several integrated tie members located on the side of the column. The integrated tie members include several internally threaded cylinders (1) corresponding to the holes on the first flange edge (b1) and the second flange edge (a1). The internally threaded cylinders (1) are fixed with limit cylinders (7) and tie bolts (8). There are insertion ports (5) between the internally threaded cylinders (1). A clamping plate (10) is provided on the side of the first flange edge (b1) away from the integrated tie members. Several tie bolts (8) pass through the internally threaded cylinders (1) and are threadedly connected to the clamping plate (10) to drive the clamping plate (10) to move towards the internally threaded cylinders (1) and clamp. The steel-concrete beam (c) has a connecting edge (c4) fixed on its side. When the connecting edge (c4) abuts against the outer side of the second flange edge (a1), the horizontal end of the I-beam (c1) is inserted between the first flange edge (b1) and the clamping plate (10). After the pre-tightening bolt (12) passes through the connecting edge (c4) and the insertion port (5) in sequence, it is threadedly connected to the stress plate (13) positioned inside the integrated tie member, thereby tightening the steel-concrete beam (c) and the concrete column (a). The tie bolt (8) is threadedly connected to the clamping plate (10), thereby clamping and positioning the horizontal end of the I-beam (c1) between the first flange edge (b1) and the clamping plate (10), thus realizing the positioning connection between the I-beam and the node connecting column (b).

2. The prefabricated steel-concrete composite beam-column joint according to claim 1, characterized in that, The outer ring of the internal threaded cylinder (1) is fixedly connected with an anti-detachment ring (9), which abuts against the second flange along (a1). At least two sets of connecting plates (2) distributed vertically are connected between several internal threaded cylinders (1). Several reinforcing blocks (3) are fixed at intervals between adjacent upper and lower connecting plates (2), and the insertion port (5) is formed between the spaced reinforcing blocks (3).

3. The prefabricated steel-concrete composite beam-column joint according to claim 2, characterized in that, The inner side of the reinforcing block (3) is fixedly connected to the limiting block (4), and an insertion cavity for placing and positioning the stress plate (13) is formed between the two limiting blocks (4).

4. The prefabricated steel-concrete composite beam-column joint according to claim 1, characterized in that, The bottom of the clamping plate (10) is fixedly connected to a clamping threaded cylinder or a clamping nut (11); the tie bolt (8) passes through the clamping plate (10) and is threadedly connected to the clamping threaded cylinder or the clamping nut (11) to drive the clamping plate (10) to move towards the inner threaded cylinder (1) for clamping.

5. A prefabricated steel-concrete composite beam-column joint according to claim 1, characterized in that, A number of first clearance openings (c2) are provided on the horizontal end of the I-beam (c1) placed outside the steel-concrete beam (c), and the first clearance openings (c2) correspond to the positions of the tie bolts (8); the vertical ends of the I-beam are provided with second clearance openings (c3) on the upper and lower sides to avoid interference with the clamping plate (10).

6. A prefabricated steel-concrete composite beam-column joint according to claim 1, characterized in that, The main body is fixed with two sets of spaced positioning blocks (b2) on its side. Several sets of first through holes are provided on the positioning blocks (b2). A second through hole is provided on the vertical end of the I-beam (c1) placed outside the steel-concrete beam (c). After the vertical end of the I-beam (c1) is inserted between the two positioning blocks (b2), the second through hole is connected to the first through hole. The main body also includes anchor bolts (14). The anchor bolts (14) pass through the first through hole and the second through hole and are threaded with anchor nuts.

7. The prefabricated steel-concrete composite beam-column joint according to claim 1, characterized in that, A flange (a2) is fixedly connected to the side of the second flange (a1) away from the clamp (10). The side wall of the flange (a2) is provided with a through hole for the pre-tightening bolt (12) to pass through freely. The flange (a2) and the connecting edge (c4) are both provided with internal threaded holes. A cover plate (15) is connected above the flange (a2) and the connecting edge (c4). The other end of the cover plate (15) abuts against the side wall of the concrete column (a). After several positioning bolts (6) pass through the cover plate (15), they are threadedly connected to the corresponding internal threaded holes, and the cover plate (15) is fixed at intervals above the second flange (a1).

8. A prefabricated steel-concrete composite beam-column joint according to claim 1, characterized in that, A groove is provided on the inner side of the horizontal end of the I-beam (c1) placed outside the steel-concrete beam (c). A protrusion (16) is fixedly connected to the inner side of the clamping plate (10). When the clamping plate (10) abuts against the horizontal end of the I-beam (c1), the groove and the protrusion (16) are matched and inserted.

9. A method for assembling prefabricated steel-concrete composite beam-column joints, characterized in that, The prefabricated steel-concrete composite beam-column joint according to any one of claims 1-8 includes the following steps: S1: Hoist the node connecting column (b) into place between the two adjacent concrete columns (a) and align the first flange edge (b1) on both the upper and lower sides with the second flange edge (a1) at the end of the concrete column (a). S2: Install the integrated tie rod above the second flange edge (a1), so that the internal threaded cylinder (1) passes through the corresponding holes of the first flange edge (b1) and the second flange edge (a1) until the anti-loosening ring (9) of the outer ring of the internal threaded cylinder (1) abuts against the upper surface of the second flange; then insert the tie bolt (8) from the inside of the internal threaded cylinder (1), and initially screw the clamping threaded cylinder or clamping nut (11) on the clamping plate (10) at the bottom, so that the clamping plate (10) and the first flange edge (b1) maintain a reserved gap, in preparation for the insertion of the I-beam (c1); S3: Hoist the steel-concrete beam (c) to the node position, adjust its posture, so that the vertical end of the embedded I-beam (c1) is inserted between the two positioning blocks (b2) on the side of the node connecting column (b), and at the same time, the horizontal end of the I-beam (c1) is inserted into the reserved gap between the first flange (b1) and the clamp (10); S4: Insert the stress plate (13) into the cavity between the two limiting blocks (4) of the integrated tie member, ensuring that it is placed between the outer wall of the concrete column (a) and the tie member; pass the pre-tightening bolt (12) through the through hole of the connecting edge (c4) and the protruding edge (a2) of the steel-concrete beam (c) and the tie member insertion port (5) in sequence, and thread it with the inner stress plate (13) to realize the prestressed tie-locking of the steel-concrete beam (c) and the concrete column (a), and at the same time tighten and align the second through hole at the vertical end of the I-beam (c1) with the first through hole of the positioning block (b2); S5: Tighten each tie bolt (8) simultaneously or in stages. Under the constraint of the limiting cylinder (7), drive the clamping plate (10) to move toward the internal thread cylinder (1) and gradually clamp the horizontal end of the I-beam (c1) until the clamping plate (10) and the first flange (b1) firmly clamp it. S6: Pass the anchor bolt (14) through the first through hole of the positioning block (b2) and the second through hole of the vertical end of the I-beam (c1) in sequence, screw the anchor nut into the other end and tighten it, and anchor the vertical end of the I-beam (c1) to the side of the node connecting column (b); S7: Cover the cover plate (15) over the second flange edge (a1), with one end abutting against the side wall of the concrete column (a) and the other end covering the connecting edge (c4) and the flange (a2); use locking bolts to pass through the cover plate (15) and connect it to the internal threaded holes above the connecting edge (c4) and the flange (a2) to fix the cover plate (15) to hide and protect the internal connecting parts. S8: Check the tightness of the connections of each flange edge, connection edge (c4), stress plate (13) and I-beam (c1), and verify the preload and torque values ​​of the bolts to ensure that they meet the design and specification requirements.

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