A steel reinforced concrete beam-column joint based on a t-shaped connector

Abstract

The utility model discloses a kind of steel reinforced concrete beam column joints based on T-shaped connecting piece, including prefabricated concrete column, prefabricated concrete beam and connecting assembly;Prefabricated concrete column includes column body frame and first concrete structure, column body frame includes open-web steel structure and the column steel bar tied to the outside of the open-web steel structure;Prefabricated concrete beam includes beam body frame and second concrete structure, beam body frame includes H-shaped steel and beam steel, H-shaped steel is arranged in the end of prefabricated concrete beam in I shape;Connecting assembly includes fixed sleeve and T-shaped connecting piece, fixed sleeve is fixed on prefabricated concrete column, T-shaped connecting piece is connected fixed H-shaped steel with fixed sleeve. Transmission path height is clear between beam column using T-shaped connecting piece, H-shaped steel and fixed sleeve, stress concentration of dispersed node area, reduce the risk that node occurs brittle failure, steel and concrete collaborative force, improve node overall carrying capacity and seismic performance.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated concrete structure engineering technology, specifically relating to a steel-concrete beam-column joint based on T-shaped connectors. Background Technology

[0002] With the advancement of prefabricated building industrialization, steel-concrete composite structures are increasingly widely used in construction engineering due to their combination of the high strength of steel and the high compressive strength of concrete. Beam-column joints, as the core force-transfer components of frame structures, directly determine the overall load-bearing capacity, seismic performance, and resistance to progressive collapse. However, traditional concrete beam-column joints face technical bottlenecks in terms of connection construction and load-bearing coordination. Meanwhile, prefabricated structures place higher demands on the assembly efficiency, clarity of force transmission paths, and adaptability to complex stresses of joints, making existing joint technologies increasingly unable to meet diverse engineering needs.

[0003] Traditional joints often use welding or direct bolt connections, resulting in unclear force transmission paths, significant stress concentration, and a high risk of brittle failure. Traditional complex structures are prone to casting defects, and also require large amounts of steel and have high maintenance energy consumption.

[0004] Based on the aforementioned technical shortcomings, there is an urgent need to develop a beam-column joint structure that combines reliable connection performance with flexible stress adaptability. This would address issues such as unclear force transmission, poor stress adaptability, and insufficient resistance to progressive collapse in existing joints. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a steel-concrete beam-column joint based on T-shaped connectors. By using T-shaped connectors, H-shaped steel and fixed sleeves, the transmission path between beams and columns is clearly defined, stress concentration in the joint area is dispersed, the risk of brittle failure of the joint is reduced, and steel and concrete work together to bear the load, thereby improving the overall load-bearing capacity and seismic performance of the joint.

[0006] The present invention adopts the following technical solution: a steel-concrete beam-column joint based on T-shaped connectors, comprising a precast concrete column, a precast concrete beam, and connecting components; The precast concrete column includes a column frame and a first concrete structure cast in place. The column frame includes a hollow steel structure and column reinforcement bars tied to the outside of the hollow steel structure. The precast concrete beam includes a beam frame and a cast-in-place second concrete structure. The beam frame includes H-beams and beam reinforcement bars fixed to the H-beams. The H-beams are arranged in an I-shape at the ends of the precast concrete beam. The connecting assembly includes a fixed sleeve and a T-shaped connector. The fixed sleeve is fitted and fixed onto the precast concrete column, and the T-shaped connector connects and fixes the H-beam to the fixed sleeve.

[0007] Preferably, the T-shaped connector includes a vertical base plate and a horizontal web plate perpendicular to the vertical base plate. The horizontal web plate includes a first web plate and a second web plate arranged at vertical intervals. The first interval between the first web plate and the second web plate is adapted to the flange thickness of the H-beam. A snap-fit ​​interface adapted to the thickness of the web plate of the H-beam is provided in the middle of the second web plate. The T-shaped connector is assembled onto the H-beam through the first interval and the snap-fit ​​interface. The T-shaped connector is fixedly connected to the fixing sleeve through the vertical base plate.

[0008] Preferably, two sets of T-shaped connectors are arranged symmetrically along the vertical direction, and the two sets of T-shaped connectors are respectively snapped onto the upper flange and lower flange of the H-beam.

[0009] Preferably, the horizontal web and the flange of the H-beam are each provided with a plurality of mounting holes, and the horizontal web and the flange are fixedly connected by a high-strength bolt assembly that is adapted to the mounting holes.

[0010] Preferably, both the vertical base plate and the fixing sleeve are provided with multiple fixing holes, and the vertical base plate and the fixing sleeve are fixedly connected by high-strength bolt assemblies that are adapted to the fixing holes.

[0011] Preferably, the first web includes two smaller webs arranged at intervals along the length of the first web, and the interval between the two smaller webs forms a snap-fit ​​interface.

[0012] Preferably, the beam reinforcement includes longitudinal bars and stirrups. The longitudinal bars include four bars, which are respectively inserted to the opposite sides of the upper and lower flanges of the H-beam to form a rectangular steel reinforcement frame. The stirrups are placed on the part of the longitudinal bars that are exposed above the H-beam.

[0013] Preferably, the hollow steel structure includes four sets of steel members arranged in a cross shape and extending vertically. Two sets of steel members arranged opposite each other are fixedly connected by multiple short steel plates arranged at intervals along the vertical direction, and two adjacent short steel plates are arranged in a cross shape.

[0014] Preferably, each group of steel components includes two angle steels arranged symmetrically at intervals. The two angle steels are assembled in a T-shape. The inner upright plate of the angle steel extends toward the center of the cross intersection of the four groups of steel components, and the outer upright plate is arranged parallel to the corresponding circumferential surface of the column frame. The inner upright plates of the corresponding angle steels of the two groups of steel components arranged opposite each other are connected by short steel plates.

[0015] Preferably, the hollow steel structure includes four sets of vertically extending steel members, which are arranged in a T-shape, and adjacent steel members are fixedly connected by multiple short steel plates arranged at intervals along the vertical direction.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: The web of the T-connector is fixedly connected to the H-beam within the precast concrete beam, while the base plate of the T-connector is fixedly connected to a fixed sleeve fitted onto the precast concrete column. Through the H-beam, the fixed sleeve, and the T-connector, a reliable dual connection between the beam and column is achieved. Loads are efficiently transferred from the beam to the column via the T-connector, forming a synergistic load-bearing assembly system. The fixed sleeve and the precast concrete column are tightly fitted together, sharing the load, resulting in a highly clear force transmission path between the beam and column. This effectively disperses stress concentration in the joint area, reduces the risk of brittle failure at the joint, and improves the structural performance.

[0017] The column frame incorporates a hollow steel structure, enhancing column stiffness and load-bearing capacity. This addresses the issue of cracking and deformation in traditional concrete columns under heavy loads. Furthermore, the hollow steel structure facilitates concrete vibration, reducing pouring defects and ensuring the quality and durability of the poured concrete. The beam frame utilizes H-beams, and the beam and column frames are rigidly connected via T-shaped connectors, ensuring coordinated load-bearing between steel and concrete and improving the overall load-bearing capacity and seismic performance of the joints.

[0018] Furthermore, the first gap adapts to the flange thickness of the H-beam, and the snap-fit ​​interface adapts to the web thickness of the H-beam, enabling the T-connector to precisely snap into the H-beam. This facilitates the assembly of the T-connector with the H-beam and reduces force transmission deviation, ensuring more direct load transfer and achieving force transmission and coordinated stress distribution between the beam and column. Simultaneously, the bidirectional fibers of the H-beam, utilizing the first gap and snap-fit ​​interface, constrain the displacement of the H-beam, increasing the stiffness of the beam-column connection node and optimizing the node's seismic resistance and resistance to progressive collapse.

[0019] Furthermore, two sets of T-shaped connectors symmetrically engage the upper and lower flanges of the H-beam, allowing the load at the beam end to be evenly transferred to the column through the upper and lower flanges, avoiding localized stress concentration. At the same time, the symmetrical T-shaped connectors form a bidirectional constraint, resisting the vertical displacement and rotation of the beam, reducing the relative deformation between the beam and column under complex conditions, and ensuring the stability of the joint structure.

[0020] Furthermore, the horizontal web and the flange of the H-beam are connected by high-strength bolt assemblies. The two can be detachably connected, which facilitates assembly to form an integrated force transmission structure and also makes it easy to replace.

[0021] Furthermore, the vertical base plate web and the fixing sleeve are connected by high-strength bolt assemblies. The two can be detached and connected, which facilitates assembly to form an integrated force transmission structure and also makes it easy to replace.

[0022] Furthermore, the first web is formed by two small web plates, with the two plates spaced apart to form a snap-fit ​​interface, which facilitates manufacturing and assembly.

[0023] Furthermore, the four longitudinal bars form a rectangular steel frame, which is restrained by stirrups and works in conjunction with the H-beams to form a beam frame, jointly bearing the bending moment and shear force of the beam, thereby improving the durability and load-bearing capacity of the precast concrete.

[0024] Furthermore, the four sets of steel profiles are arranged in a cross shape. Their cross-sectional mechanical properties can adapt to the stress requirements of axial compressive load conditions of precast concrete columns, improving the load-bearing adaptability of precast concrete columns under complex stress scenarios. The two sets of steel profiles arranged opposite each other are connected and fixed by multiple short steel plates arranged at intervals. The short steel plates act as gusset plates to ensure the overall stiffness and force transmission continuity of the steel profiles. The two vertically adjacent short steel plates are arranged in a cross shape, and the entire open-web steel profile structure forms an open-web structure, reducing the amount of steel used while ensuring stiffness.

[0025] Furthermore, each group of steel components includes two symmetrically spaced angle steels, which are assembled into a T-shape. The open-web steel structure has stronger shear and bending resistance, can better transfer the load of the column frame, and enhance the reliability of the precast concrete column.

[0026] Furthermore, the four sets of steel components are arranged in a T-shape. Their cross-sectional mechanical properties can adapt to the stress requirements of the precast concrete column under eccentric compression load, improving the load-bearing adaptability of the precast concrete column under complex stress scenarios. Adjacent steel components are connected by short steel plates, which serve as gusset plates to ensure the overall stiffness and force transmission continuity of the steel components. Multiple short steel plates are arranged at intervals along the vertical direction. The entire open-web steel structure constitutes an open-web structure, reducing the amount of steel used while ensuring stiffness.

[0027] In summary, this utility model optimizes the column structure, innovates the pre-embedded beam design and connection method, achieves reliable force transmission at the nodes, simplifies construction procedures, and meets the seismic design principle of "strong column, weak beam; strong node, weak component". It is applicable to high-rise, super high-rise and large-span prefabricated buildings, and promotes the industrial upgrading of prefabricated structure technology.

[0028] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the following description of the relative embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of a steel-concrete beam-column joint based on a T-shaped connector in Embodiment 1 of this utility model; Figure 2 This is an assembly diagram of the main frame, beam frame, and connecting structure in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the hollow steel structure in Embodiment 1 of this utility model; Figure 4 This is a top view of the hollow steel structure in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the structure of the fixing sleeve in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the T-shaped connector in Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of the H-beam structure in Embodiment 1 of this utility model; Figure 8 This is a schematic diagram of the overall structure of the beam-column joint in Embodiment 2 of this utility model; Figure 9 This is an assembly diagram of the main frame, beam frame, and connecting structure in Embodiment 2 of this utility model; Figure 10 This is a first-view axonometric view of the hollow steel structure in Embodiment 2 of this utility model; Figure 11 This is a second-view axonometric view of the hollow steel structure in Embodiment 2 of this utility model; Figure 12 This is a top view of the hollow steel structure in Embodiment 2 of this utility model.

[0031] The components include: 1. Precast concrete column; 2. Precast concrete beam; 3. T-shaped connector; 31. Vertical base plate; 32. Horizontal web; 33. First web; 34. Second web; 35. First partition; 36. Clip interface; 37. Small web; 4. Hollow steel structure; 41. Steel component; 5. Fixing sleeve; 6. H-beam; 61. Upper flange; 62. Lower flange; 63. Steel web; 7. Column reinforcement; 8. Beam reinforcement; 9. High-strength bolt; 10. First concrete structure; 11. Second concrete structure; 12. Connecting assembly; 14. Angle steel; 141. Inner vertical plate; 142. Outer vertical plate; 15. Short steel plate; 16. Mounting hole; 17. Fixing hole; 18. Longitudinal reinforcement; 19. Stirrup. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "one side," "one end," and "one side," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should be noted that, 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 utility model based on the specific circumstances.

[0035] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0036] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0037] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0038] The accompanying drawings show various structural schematic diagrams according to embodiments of the present invention. These drawings are not to scale, and some details have been enlarged and may have been omitted for clarity. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0039] This utility model provides a steel-concrete beam-column joint based on T-shaped connectors. By optimizing the column structure, innovating the pre-embedded design and connection method of the beam, it achieves reliable force transmission of the joint and simplifies the construction process. At the same time, it meets the seismic design principle of "strong column and weak beam, strong joint and weak component". It is suitable for high-rise, super high-rise and large-span prefabricated buildings and promotes the industrial upgrading of prefabricated structure technology.

[0040] Please see Figure 1 As shown, this utility model discloses a steel-concrete beam-column joint based on a T-shaped connector, comprising a precast concrete column 1, a precast concrete beam 2, and a connecting component 12.

[0041] Two sets of precast concrete beams 2 are symmetrically arranged on the left and right sides of the precast concrete, and the connecting component 12 is used to connect the precast concrete beams 2 and the precast concrete columns 1.

[0042] like Figure 2 As shown, the precast concrete column 1 includes a column frame and a first concrete structure 10 cast in place. The column frame includes a hollow steel structure 4 and column reinforcing bars 7 tied to the outside of the hollow steel structure 4.

[0043] Specifically, Q690 high-strength steel is selected to process the hollow steel section. The column reinforcement 7 includes a cuboid frame structure composed of four vertically extending longitudinal bars 18, and stirrups 19 tied to the outside of the longitudinal bars 18. Multiple sets of stirrups 19 are arranged from top to bottom to form the structure of the column reinforcement 7. The column reinforcement 7 is integrally fitted onto the outside of the hollow steel section structure 4, and the spatial positions of the two avoid overlap and reserve the operation and stress space required by the specifications.

[0044] In actual prefabrication, the hollow steel structure 4 is first formed according to the design dimensions. Then, the hollow steel structure 4 is precisely positioned within the prefabrication template, and the column reinforcement 7 is tied, ensuring that the thickness of the reinforcement protective layer meets the specifications. Concrete is poured, and a high-frequency vibrator is used to compact it during the pouring process to avoid defects such as air bubbles and honeycombing. After pouring, a protective film is applied for curing for 14 days to ensure that the concrete strength meets the standards and that the appearance is smooth and free of obvious defects. This completes the pouring and forming of the first concrete structure 10, thus prefabricating the precast concrete column 1.

[0045] In this embodiment, the precast concrete beam 2 includes a beam frame and a cast-in-place second concrete structure 11. The beam frame includes H-beams 6 and beam reinforcing bars 8 fixed to the H-beams 6.

[0046] The H-beam 6 needs to be compatible with the internal space of the precast concrete beam 2. It is made of high-strength steel of the same grade and is treated with anti-corrosion after forming. Specifically, in this embodiment, Q690 high-strength steel is used to process the H-beam 6. The H-beam 6 is arranged in an I-shape at the end of the precast concrete beam 2. In actual precasting, the H-beam 6 is fixed in the precast formwork of the beam and the beam reinforcement 8 is tied. Concrete is poured, and the pouring direction is along the long axis of the beam. During vibration, avoid touching the H-beam 6 and the beam reinforcement 8. The curing method is the same as that of the column. At the same time, the beam end connection surface is ground to ensure the smoothness of subsequent assembly.

[0047] Preferably, in this embodiment, the concrete used for both the precast concrete beam 2 and the precast concrete column 1 is fair-faced concrete of the same strength grade. Fair-faced concrete, with its characteristics of being decoration-free and low-pollution, aligns with the development needs of the construction industry for low-carbon emission reduction. The application of fair-faced concrete eliminates subsequent decoration processes, reduces building material consumption and carbon emissions, and achieves both a decoration-free effect and low-carbon environmental protection goals.

[0048] In this embodiment, as Figure 1 As shown, the connecting component 12 includes a fixing sleeve 5 and a T-shaped connector 3. The fixing sleeve 5 is fitted and fixed on the precast concrete column 1. Specifically, the fixing sleeve 5 is made of Q690 high-strength steel of the design specifications and is manufactured according to the structural size requirements. After the processing is completed, the surface of the fixing sleeve 5 is treated with anti-corrosion to improve its durability. The specific method of anti-corrosion treatment is common knowledge known to those skilled in the art and will not be described in detail here.

[0049] The fixing sleeve 5 is connected to the precast concrete column 1 via a non-through bolt. Specifically, a pre-embedded nut is pre-installed inside the precast concrete column 1, and the fixing sleeve 5 is provided with a pre-installed hole corresponding to the pre-embedded nut. The bolt passes through the pre-installed hole and engages with the threaded part of the pre-embedded nut, thus fixing the fixing sleeve 5 to the precast concrete column 1, achieving rigid fixation between the precast concrete column 1 and the fixing sleeve 5, forming an integrated force transmission structure. Of course, in other embodiments, threaded holes corresponding to the bolts can also be provided at corresponding positions on the precast concrete column 1 to complete the assembly of the fixing sleeve 5 and the precast concrete column 1.

[0050] The T-connector 3 is also made of Q690 high-strength steel and its surface is treated with anti-corrosion coating. The T-connector 3 includes a vertical base plate 31 and a horizontal web plate 32 vertically disposed in the middle of the vertical base plate 31. The vertical base plate 31 is used to fix and connect with the fixing sleeve 5, and the horizontal web plate 32 is used to fix and connect with the flanges of the H-beams 6 arranged in an I-shape, so as to realize the fixed connection between the precast concrete column 1 and the precast concrete beam 2, and realize the force transmission and coordinated force sharing between the beam and the column.

[0051] In summary, the beam-column joint of this utility model achieves a reliable dual connection between the beam and the column through the H-beam 6, the fixed sleeve 5, and the T-shaped connector 3. The load is efficiently transferred from the beam to the column through the T-shaped connector 3, forming a synergistic force-bearing assembly system. The fixed sleeve 5 and the precast concrete column 1 are closely fitted together to share the load, making the force transmission path between the beam and the column highly clear. This can efficiently disperse the stress concentration in the joint area, reduce the risk of brittle failure of the joint, and improve the structural performance.

[0052] The column frame incorporates a hollow steel structure 4, enhancing column stiffness and load-bearing capacity, and addressing the issue of cracking and deformation of traditional concrete columns under heavy loads. Simultaneously, the hollow steel structure 4 facilitates concrete vibration, reducing pouring defects and ensuring the quality and durability of the poured concrete. The beam frame utilizes H-beams 6, and the beam frame and column frame are rigidly connected via T-shaped connectors 3 and fixing sleeves 5, ensuring coordinated load-bearing between steel and concrete, and improving the overall load-bearing capacity and seismic performance of the joints.

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0054] Please see Figures 1 to 7 As shown, the hollow steel structure 4 of the steel-concrete beam-column joint based on T-shaped connectors of this utility model includes four sets of steel members 41, which are arranged in a cross shape and extend vertically.

[0055] Specifically, in this embodiment, the length direction of the two precast concrete beams 2 is defined as the left-right direction, and the direction perpendicular to the beam length direction in the horizontal plane is defined as the front-back direction. Then, two sets of steel members 41 are arranged symmetrically along the left-right direction, and the other two sets of steel members 41 are arranged symmetrically along the front-back direction.

[0056] Two sets of steel profiles 41 arranged opposite each other are fixedly connected by multiple short steel plates 15 arranged vertically at intervals, specifically, as follows: Figure 3 As shown, two sets of steel profiles 41 arranged symmetrically in the left-right direction are fixedly connected by multiple short steel plates 15 extending in the left-right direction, and two sets of steel profiles 41 arranged symmetrically in the front-back direction are fixedly connected by multiple short steel plates 15 extending in the front-back direction. The spacing between two adjacent short steel plates 15 with the same length extension direction is adapted to the height dimension of the short steel plate 15. Thus, in this embodiment, the short steel plates 15 extending in the left-right direction and the short steel plates 15 extending in the front-back direction are arranged sequentially in the height direction, and the two vertically adjacent short steel plates 15 are arranged in a cross shape.

[0057] The four sets of steel members 41 are arranged in a cross shape. Their cross-sectional mechanical properties can adapt to the stress requirements of the precast concrete column 1 under axial compressive load conditions, improving the load-bearing adaptability of the precast concrete column 1 under complex stress scenarios. The two sets of steel members 41 arranged opposite each other are connected and fixed by multiple short steel plates 15 arranged at intervals. The two vertically adjacent short steel plates 15 are arranged in a cross shape. The short steel plates 15 act as gusset plates to ensure the overall rigidity and force transmission continuity of the steel members 41. At the same time, they form a cavity inside the hollow steel structure 4, which facilitates concrete vibration, reduces pouring defects, and ensures the quality and durability of the poured concrete. Furthermore, by using a hollow structure, the amount of steel used can be reduced while ensuring rigidity.

[0058] Preferably, in this embodiment, such as Figure 3 , 4 As shown, each group of steel components 41 includes two angle steels 14, which are arranged symmetrically with a gap between them. The two angle steels 14 are assembled in a T-shape.

[0059] Specifically, the angle steel 14 is formed from Q690 high-strength steel. The angle steel 14 includes vertically arranged inner upright plates 141 and outer upright plates 142. The inner upright plates 141 of the two angle steels 14 in each group of steel members 41 extend towards the center of the cross intersection of the four groups of steel members 41. The corresponding two inner upright plates 141 of the two groups of steel members 41 arranged symmetrically around the cross intersection center are fixedly connected by short steel plates 15.

[0060] The two outer vertical plates 142 of each group of steel components 41 are set on the side of the inner vertical plate 141 facing away from the center of the cross, so that the plane of the two outer vertical plates 142 is arranged parallel to the corresponding circumferential surface of the column frame.

[0061] Each group of steel components 41 includes two symmetrically spaced angle steels 14, which are assembled into a T-shape. The open-web steel structure 4 has stronger shear and bending resistance, can better transfer the load of the column frame, and enhance the reliability of the precast concrete column 1.

[0062] Preferably, in this embodiment, such as Figure 6 As shown, the T-shaped connector 3 includes a vertical base plate 31 and a horizontal web plate 32 perpendicular to the vertical base plate 31. The horizontal web plate 32 includes a first web plate 33 and a second web plate 34 arranged at vertical intervals. The first web plate 33 and the second web plate 34 are arranged in parallel.

[0063] The first gap 35 between the first web 33 and the second web 34 is adapted to the flange thickness of the H-beam 6. A snap-fit ​​interface 36 adapted to the thickness of the web 63 of the H-beam 6 is provided in the middle of the second web 34. The T-shaped connector 3 is assembled on the H-beam 6 through the first gap 35 and the snap-fit ​​interface 36. The T-shaped connector 3 is fixedly connected to the fixing sleeve 5 through the vertical base plate 31.

[0064] The first gap 35 is adapted to the flange thickness of the H-beam 6, and the clamping interface 36 is adapted to the thickness of the web 63 of the H-beam 6, enabling the T-connector 3 to precisely engage with the H-beam 6. This facilitates the assembly of the T-connector 3 with the H-beam 6, and the precise engagement reduces force transmission deviation, ensuring more direct load transfer and achieving force transmission and coordinated stress distribution between the beam and column. Simultaneously, the first gap 35 and the clamping interface 36 provide bidirectional restraint to the H-beam 6, constraining its displacement, improving the stiffness of the beam-column connection, and optimizing the joint's seismic resistance and resistance to progressive collapse.

[0065] Specifically, in this embodiment, the second web plate 34 includes two small web plates 37 arranged at intervals along the length of the first web plate 33. The interval between the two small web plates 37 forms a snap-fit ​​interface 36. The first web plate 33, the small web plates 37 and the bottom plate are formed by welding, and the weld after welding is subjected to non-destructive testing.

[0066] Specifically, in this embodiment, the H-beam 6 is arranged in an I-shape, and its flanges include an upper flange 61 and a lower flange 62. The web 63 of the steel section connects the upper flange 61 and the lower flange 62.

[0067] Preferably, each H-beam 6 is provided with two sets of T-shaped connectors 3. Specifically, two sets of T-shaped connectors 3 are symmetrically arranged vertically, and the two sets of T-shaped connectors 3 are respectively snapped onto the upper flange 61 and the lower flange 62 of the H-beam 6. The two sets of T-shaped connectors 3 symmetrically snap onto the upper flange 61 and the lower flange 62 of the H-beam 6, so that the load at the end of the beam is evenly transferred to the column through the upper flange 61 and the lower flange 62, avoiding local stress concentration. At the same time, the symmetrical T-shaped connectors 3 form a two-way constraint, resisting the vertical displacement and rotation of the beam, reducing the relative deformation between the beam and the column under complex conditions, and ensuring the stability of the joint structure.

[0068] Preferably, in this embodiment, the horizontal web 32 and the upper flange 61 and lower flange 62 of the H-beam 6 are each provided with a plurality of mounting holes 16. The horizontal web 32 and the corresponding flange are fixedly connected by a high-strength bolt assembly adapted to the mounting holes 16. Specifically, the high-strength bolt assembly includes a high-strength bolt 9 and a high-strength nut. The high-strength bolt 9 passes through the first web 33, the flange, and the second web 34 in sequence, and is then tightened and locked by screwing on the high-strength nut. The T-shaped connector 3 and the H-beam 6 are detachably connected by the bolt assembly, which facilitates assembly to form an integrated force transmission structure and also facilitates replacement.

[0069] Similarly, multiple fixing holes 17 are provided on both the vertical base plate 31 and the fixing sleeve 5. The vertical base plate 31 and the fixing sleeve 5 are fixedly connected by a high-strength bolt assembly that matches the fixing holes 17. Specifically, the high-strength bolt assembly includes a high-strength bolt 9, and a high-strength nut is pre-embedded in the precast concrete column 1. The high-strength bolt 9 passes through the vertical base plate 31 and the fixing sleeve 5, penetrates into the precast concrete column 1, and is threadedly connected to the corresponding high-strength nut to complete the fastening. The T-shaped connector 3 and the fixing sleeve 5 are detachably connected by the bolt assembly, which facilitates assembly to form an integrated force transmission structure and also facilitates replacement.

[0070] Preferably, in this embodiment, the beam reinforcement 8 also includes longitudinal bars 18 and stirrups 19. The longitudinal bars 18 consist of four bars, extending horizontally and passing through the opposite sides of the upper flange 61 and lower flange 62 of the H-beam 6, respectively, and are welded and fixed to the inner sides of the corresponding flanges of the H-beam 6, forming a rectangular steel reinforcement frame. The stirrups 19 of the beam reinforcement 8 are located on the portion of the longitudinal bars 18 exposed above the H-beam 6, thus forming the beam frame structure. The four longitudinal bars 18 form a rectangular steel reinforcement frame, constrained by the stirrups 19, and work together with the H-beam 6 to form the beam frame, jointly bearing the bending moment and shear force of the beam, thus improving the durability and load-bearing capacity of the precast concrete.

[0071] This utility model discloses a construction method for a steel-concrete beam-column joint based on a T-shaped connector, comprising the following steps: 1) Hoist the precast concrete column 1 equipped with the fixing sleeve 5 to the design position, use positioning equipment to calibrate the verticality and elevation of the precast concrete column 1, ensure that the position of the fixing sleeve 5 meets the docking requirements of the precast concrete beam 2, fix the precast concrete column 1 with column foot anchor bolts, and set up temporary supports to prevent the column from shifting.

[0072] 2) Align the vertical base plate 31 of the T-shaped connector 3 with the fixing sleeve 5 in the middle of the precast concrete column 1. Specifically, align the fixing hole 17 of the vertical base plate 31 with the fixing hole 17 of the fixing sleeve 5. Insert the high-strength bolt 9 into the corresponding hole and perform initial tightening. After calibrating the levelness of the T-shaped connector 3, perform final tightening to ensure that the T-shaped connector 3 and the fixing sleeve 5 are firmly connected without loosening.

[0073] 3) Hoist the precast concrete beam 2, insert the end flange of the H-beam 6 inside the beam into the first interval 35 of the T-connector, insert the steel web 63 of the H-beam 6 into the interface of the T-connector 3, and make the plane of the end flange of the H-beam 6 inside the beam fit with the web of the T-connector 3. Adjust the level and elevation of the precast concrete beam 2 to ensure that the mounting hole 16 of the H-beam 6 is aligned with the mounting hole 16 of the T-connector 3. Insert the high-strength bolts 9 into the holes of the H-beam 6 and the T-connector 3, and tighten them in sequence according to the principle of "symmetrical tightening" to complete the fixing of the precast concrete beam 2 and the T-connector 3.

[0074] 4) Clean up debris in the node area, and protect the exposed parts of the high-strength bolts 9 and high-strength nuts with anti-corrosion coating (such as applying anti-rust paint) to complete the assembly of the entire node.

[0075] In summary, the beam-column joint of this utility model is suitable for steel-framed fair-faced concrete structures that have high requirements for connection reliability, stress adaptability and green environmental protection performance, and can be widely used in prefabricated structural systems of industrial and civil buildings.

[0076] Example 2: This example provides a different hollow steel structure. Unlike Example 1, in this example, as... Figures 8 to 12 As shown, the hollow steel structure 4 includes four sets of vertically extending steel members 41. Specifically, the four sets of steel members 41 are arranged in a T-shape, and adjacent steel members 41 are fixedly connected by multiple short steel plates 15 arranged at vertical intervals.

[0077] Specifically, in this embodiment, the four sets of angle steel 14 are arranged as follows: Figure 12 The arrangement shown includes three outer groups and one middle group, arranged in a T-shape on the same horizontal plane.

[0078] Each group of steel components 41 also includes two spaced and symmetrically arranged angle steels 14. For example... Figure 10 , 11 As shown in Figures 1 and 12, the relative angle steels 14 of two adjacent sets of steel profiles 41 are connected and fixed by short steel plates 15 arranged at intervals along the vertical direction, forming a T-shaped open-web steel structure 4.

[0079] The four sets of steel members 41 are arranged in a T-shape. Their cross-sectional mechanical properties can be adapted to the stress requirements of the precast concrete column 1 under eccentric compression load, thus achieving a match between the cross-sectional form and the stress requirements. Adjacent steel members 41 are connected by short steel plates 15. The short steel plates 15 act as gusset plates to ensure the overall rigidity and force transmission continuity of the steel members 41. Multiple short steel plates 15 are arranged at intervals along the vertical direction to form a hollow cavity. This reduces the amount of steel used while ensuring rigidity. At the same time, the hollow cavity facilitates concrete vibration, reduces casting defects, and ensures concrete quality and durability.

[0080] The above content is only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed in this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. A steel-concrete composite beam-column joint based on a T-shaped connector, characterized in that, It includes precast concrete columns (1), precast concrete beams (2), and connecting components (12); The precast concrete column (1) includes a column frame and a cast-in-place first concrete structure (10). The column frame includes a hollow steel structure (4) and column reinforcement (7) tied to the outside of the hollow steel structure (4). The precast concrete beam (2) includes a beam frame and a cast-in-place second concrete structure (11). The beam frame includes H-beams (6) and beam reinforcement bars (8) fixed on the H-beams (6). The H-beams (6) are arranged in an I-shape at the ends of the precast concrete beam (2). The connecting assembly (12) includes a fixing sleeve (5) and a T-shaped connector (3). The fixing sleeve (5) is fitted and fixed on the precast concrete column (1), and the T-shaped connector (3) connects and fixes the H-beam (6) and the fixing sleeve (5).

2. The steel-concrete composite beam-column joint based on T-shaped connectors according to claim 1, characterized in that, The T-shaped connector (3) includes a vertical base plate (31) and a horizontal web plate (32) perpendicular to the vertical base plate (31). The horizontal web plate (32) includes a first web plate (33) and a second web plate (34) arranged at vertical intervals. The first interval (35) between the first web plate (33) and the second web plate (34) is adapted to the flange thickness of the H-beam (6). The second web plate (34) has a snap-fit ​​interface (36) in the middle that is adapted to the thickness of the steel web plate (63) of the H-beam (6). The T-shaped connector (3) is assembled on the H-beam (6) through the first interval (35) and the snap-fit ​​interface (36). The T-shaped connector (3) is fixedly connected to the fixing sleeve (5) through the vertical base plate (31).

3. The steel-concrete composite beam-column joint based on T-shaped connectors according to claim 2, characterized in that, Two sets of T-shaped connectors (3) are arranged symmetrically in the vertical direction. The two sets of T-shaped connectors (3) are respectively snapped onto the upper flange (61) and lower flange (62) of the H-beam (6).

4. The steel-concrete composite beam-column joint based on T-shaped connectors according to claim 3, characterized in that, The horizontal web (32) and the flange of the H-beam (6) are provided with a number of mounting holes (16), and the horizontal web (32) and the flange are fixedly connected by high-strength bolt assemblies that are adapted to the mounting holes (16).

5. The steel-concrete composite beam-column joint based on T-shaped connectors according to claim 2, characterized in that, The vertical base plate (31) and the fixing sleeve (5) are each provided with a plurality of fixing holes (17), and the vertical base plate (31) and the fixing sleeve (5) are fixedly connected by a high-strength bolt assembly that is adapted to the fixing holes (17).

6. The steel-concrete composite beam-column joint based on T-shaped connectors according to claim 2, characterized in that, The first web plate (33) includes two small web plates (37) arranged at intervals along the length of the first web plate (33), and the interval between the two small web plates (37) forms a card interface (36).

7. The steel-concrete composite beam-column joint based on T-shaped connectors according to claim 1, characterized in that, The beam reinforcement (8) includes longitudinal bars (18) and stirrups (19). The longitudinal bars (18) include four bars, which are respectively inserted to the opposite sides of the upper flange (61) and lower flange (62) of the H-beam (6) to form a rectangular steel reinforcement frame. The stirrups (19) are set on the part of the longitudinal bars (18) that are exposed on the H-beam (6).

8. The steel-concrete composite beam-column joint based on T-shaped connectors according to claim 1, characterized in that, The hollow steel structure (4) includes four sets of steel members (41) arranged in a cross shape and extending vertically. The two sets of steel members (41) arranged opposite each other are fixedly connected by multiple short steel plates (15) arranged vertically at intervals. The two adjacent short steel plates (15) are arranged in a cross shape.

9. The steel-concrete composite beam-column joint based on T-shaped connectors according to claim 8, characterized in that, Each group of steel components (41) includes two angle steels (14) arranged symmetrically at intervals. The two angle steels (14) are assembled in a T-shape. The inner upright plate (141) of the angle steel (14) extends toward the center of the cross intersection of the four groups of steel components (41), and the outer upright plate (142) is arranged parallel to the corresponding circumferential surface of the column frame. The inner upright plates (141) of the corresponding angle steels (14) of the two groups of steel components (41) arranged opposite to each other are connected by short steel plates (15).

10. The steel-concrete composite beam-column joint based on T-shaped connectors according to claim 1, characterized in that, The hollow steel structure (4) includes four sets of vertically extending steel members (41), which are arranged in a T-shape. Adjacent steel members (41) are fixedly connected by multiple short steel plates (15) arranged vertically at intervals.

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