Connecting structure of beam and steel column and connecting method thereof

Abstract

The invention discloses a beam and steel column connecting structure and a connecting method thereof, and relates to the technical field of building constructions.The beam and steel column connecting structure mainly comprises a prefabricated steel column and a beam, the prefabricated steel column comprises a column body, an upper annular plate, a lower annular plate, an upper fixing piece and a lower fixing piece, one end of the upper fixing piece is fixedly connected with the column body, and the other end of the upper fixing piece is fixedly connected with the upper annular plate; one end of the lower fixing piece is fixedly connected with the column body, the other end of the lower fixing piece is fixedly connected with the lower annular plate, gaps exist between the upper annular plate and the column body and between the lower annular plate and the column body, and the upper annular plate and the lower annular plate are vertically arranged around the column body; and the end part of the beam longitudinal bar is bent and can extend into a gap between the upper annular plate and the column body. The method can greatly reduce the workload of a construction site, improves the operation efficiency and the operation quality, and is high in reliability and good in stability.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and in particular to a connection structure of beams and steel columns and a connection method thereof. Background Art

[0002] Steel-concrete hybrid structures are a widely used structural system. Commonly used configurations include concrete beams, concrete-filled steel tubular columns, and concrete beams, steel columns. This combination leverages the high bearing capacity and ductility of steel columns, while also leveraging the moldability and low cost of concrete beam-slab systems. Traditional connections between concrete beams and steel columns are generally categorized into three types: First, the steel column is equipped with a connecting corbel, and the concrete beam reinforcement is welded to the corbel. This requires extensive welding work and numerous weld points, resulting in a high workload and difficulty in ensuring quality. Second, the steel column is equipped with a concrete ring beam, and the concrete beam reinforcement is anchored within the concrete ring beam. This method requires bending the reinforcement into a circular shape during the ring beam manufacturing process, but the reinforcement used in the ring beam is generally high-grade steel, making bending very difficult. Third, the steel column is perforated, and the concrete beam reinforcement passes through the perforation. However, this method weakens the bearing capacity of the steel column and the connection node, making the requirement of a strong node and a weak component impossible to guarantee. The above three methods all require a large amount of on-site work, and since a large number of welding, anchoring and binding processes are required, the quality of the project is easily affected by the construction environment and the level of the operators.

[0003] Patent CN202466845U discloses a mid-layer node connection structure between a steel tube concrete column and a steel concrete beam, including an upper ring plate and a lower ring plate. However, the upper ring plate and the lower ring plate are both arranged close to the steel tube concrete column. Although the shear resistance can be guaranteed, the upper ring plate and the lower ring plate are close to the steel tube concrete column, and the ability to withstand forces parallel to the steel tube concrete column is poor, that is, the bending resistance is poor, and the structural stability and safety cannot be guaranteed.

[0004] Therefore, a connection structure and connection method of beams and steel columns are needed, which can greatly reduce the workload on the construction site, improve work efficiency and work quality, and have high reliability and good stability. Summary of the Invention

[0005] The purpose of the present invention is to provide a connection structure between beams and steel columns and a connection method thereof to solve the problems existing in the above-mentioned prior art, which can greatly reduce the workload on the construction site, improve work efficiency and work quality, and have high reliability and good stability.

[0006] To achieve the above object, the present invention provides the following solutions: The present invention provides a connection structure between a beam and a steel column, comprising: A prefabricated steel column, comprising a column body, an upper ring plate, a lower ring plate, an upper fixing member, and a lower fixing member, wherein one end of the upper fixing member is fixedly connected to the column body, and the other end is fixedly connected to the upper ring plate; one end of the lower fixing member is fixedly connected to the column body, and the other end is fixedly connected to the lower ring plate; and there is a gap between the upper ring plate and the lower ring plate and the column body, and the upper ring plate and the lower ring plate are both vertically arranged around the column body; The beam is perpendicular to and fixedly connected to the prefabricated steel column, and the beam is provided with beam longitudinal reinforcement, and the end portion of the beam longitudinal reinforcement is bent to extend into the gap between the upper ring plate and the column.

[0007] Preferably, a plurality of the upper fixing members and the lower fixing members are provided along the circumference of the column and are arranged perpendicular to the column.

[0008] Preferably, two upper ring plates are provided along the radial direction of the column, and there is a gap between the two upper ring plates; Two lower ring plates are provided along the radial direction of the column, and a gap exists between the two lower ring plates.

[0009] Preferably, it further comprises ring beam stirrups, a plurality of which are provided along the circumference of the upper ring plate, and the ring beam stirrups are used to clamp the two upper ring plates and the two lower ring plates.

[0010] Preferably, a reinforcement hoop is further included, one end of which is fixed to the middle of the ring beam stirrup between the two upper ring plates, and the other end is fixed to the middle of the ring beam stirrup between the two lower ring plates.

[0011] Preferably, it further comprises circumferential stirrups, which are used to connect a plurality of the ring beam stirrups.

[0012] Preferably, the upper fixing member includes a shearing portion and a fixing portion, the shearing portion and the fixing portion are fixedly connected, the height of the shearing portion is greater than the height of the fixing portion, and is used to be fixedly connected to the column, the one with the smaller diameter of the two upper ring plates is fixedly provided at the connection between the corresponding fixing portion and the shearing portion, and the one with the larger diameter of the two upper ring plates is fixedly provided at an end of the corresponding fixing portion away from the shearing portion; The lower fixing member includes a shear-resistant portion and a fixing portion, the shear-resistant portion and the fixing portion are fixedly connected, the height of the shear-resistant portion is greater than the height of the fixing portion, and is used to be fixedly connected to the column, the smaller diameter of the two lower ring plates is fixedly arranged at the connection between the corresponding fixing portion and the shear-resistant portion, and the larger diameter of the two lower ring plates is fixedly arranged at the end of the corresponding fixing portion away from the shear-resistant portion.

[0013] Preferably, it also includes a reinforcement plate, which is horizontally arranged around the column and fixedly connected to the column, and the top of the shear-resistant part is fixedly connected to the bottom of the reinforcement plate and extends along the width direction of the reinforcement plate; the beam longitudinal reinforcement includes top longitudinal reinforcement and bottom longitudinal reinforcement, the end of the top longitudinal reinforcement is bent and located above the upper ring plate for extending into the gap, and the bottom longitudinal reinforcement is located above the lower ring plate for extending to the gap; the beam also includes beam stirrups, which clamp the top longitudinal reinforcement and the bottom longitudinal reinforcement.

[0014] A method for connecting a beam and a steel column comprises the following steps: S1. Preparation of prefabricated steel columns: Provide a prefabricated steel column comprising a column body, an upper ring plate, a lower ring plate, an upper fixing member, and a lower fixing member. One end of the upper fixing member is fixedly connected to the column body and the other end is fixedly connected to the upper ring plate. One end of the lower fixing member is fixedly connected to the column body and the other end is fixedly connected to the lower ring plate. There should be gaps between the upper and lower ring plates and the column body. The upper and lower ring plates are both vertically arranged around the column body. Inspect the connection integrity, dimensions, and quality of each component to ensure compliance with design requirements. S2. Beam Preparation: Provide a beam with longitudinal reinforcement, including top and bottom longitudinal reinforcement. Bend the ends of the top longitudinal reinforcement to form a bent section at a preset angle. Maintain the bottom longitudinal reinforcement at an appropriate length to fit between the upper ring plate and the column, and between the lower ring plate and the column. Check that the longitudinal reinforcement arrangement, stirrup installation, and steel bar cover thickness meet specifications. S3. Alignment and installation of beams and prefabricated steel columns: Use hoisting equipment to lift the beams to the corresponding positions of the prefabricated steel columns, control the horizontality and verticality of the beams, accurately align the bent ends of the top longitudinal reinforcements with the gap between the upper ring plate and the columns, and align the extended portions of the bottom longitudinal reinforcements with the gap between the lower ring plate and the columns; S4. Insertion and temporary fixation of longitudinal reinforcement: Insert the bent end of the top longitudinal reinforcement into the gap between the upper ring plate and the column, and insert the extended section of the bottom longitudinal reinforcement into the gap between the lower ring plate and the column, so as to form a preliminary connection between the longitudinal reinforcement of the beam and the prefabricated steel column; use temporary supports to fix the position of the beam to ensure that the beam does not move during subsequent processes; S5. Installation of ring beam stirrups: Install multiple ring beam stirrups along the circumference of the upper ring plate to clamp the two upper ring plates and the two lower ring plates together to ensure that the ring plates can work together when subjected to force and prevent local deformation; S6. Installation of reinforcing hoops and circumferential stirrups: Install reinforcing hoops with one end fixed to the middle of the ring beam stirrups between the two upper ring plates and the other end fixed to the middle of the ring beam stirrups between the two lower ring plates to form a vertical reinforcement system. Install circumferential stirrups to connect multiple ring beam stirrups to form a complete stirrup network and enhance overall stability. S7. Inspection and adjustment of connection nodes: Check the shear and bending performance of the connection nodes between beams and prefabricated steel columns, and check the installation quality of the ring beam stirrups, reinforcing stirrups, and circumferential stirrups to see if there is any looseness, misalignment, or poor welding. Adjust or rework any problems that exist. S8. Subsequent construction and acceptance: Pour and maintain concrete in areas where concrete pouring is required; remove temporary supports after the concrete strength reaches the design requirements; conduct overall structural acceptance, including node stiffness, beam-column verticality, steel bar protective layer, welding quality, overall stability and other indicators, to ensure that the design and specification requirements are met.

[0015] Preferably, in said S2, the bending angle of the top longitudinal reinforcement is 90° to 135°, and the elongated length of the bottom longitudinal reinforcement is greater than 20 cm to ensure a reliable anchoring length; In said S5, the spacing of the ring beam stirrups is 10 cm to 20 cm, and a closed stirrup arrangement is adopted; In the above S6, the reinforcement hoops are distributed at equal intervals, and the connection points are connected by full welding or high-strength bolts; In said S7, the node inspection is carried out by combining ultrasonic testing, magnetic particle testing or visual inspection; In the above-mentioned S8, the temporary support is removed after the concrete reaches more than 75% of the design strength.

[0016] Compared with the prior art, the present invention has achieved the following technical effects: The prefabricated steel column of the present invention includes a column body, an upper ring plate, a lower ring plate, an upper fixing piece and a lower fixing piece. One end of the upper fixing piece is fixedly connected to the column body, and the other end is fixedly connected to the upper ring plate. One end of the lower fixing piece is fixedly connected to the column body, and the other end is fixedly connected to the lower ring plate. There are gaps between the upper ring plate, the lower ring plate and the column body. The upper ring plate and the lower ring plate are vertically arranged around the column body. The beam is perpendicular to and fixedly connected to the prefabricated steel column. The beam is provided with longitudinal reinforcement. The ends of the longitudinal reinforcement are bent so as to extend into the gap between the upper ring plate and the column body. Prefabricated steel columns are standardized and manufactured in factories, with the dimensions and connection methods of each component precisely designed. At the construction site, the ends of the beam longitudinal reinforcement simply need to be bent and inserted directly into the gap between the upper ring plate and the column for installation and fixation. Complex on-site welding or bolting operations are unnecessary, greatly simplifying the construction process and improving construction efficiency. Furthermore, since most components are prefabricated in the factory, quality during the production process can be effectively monitored. Compared to on-site production, the quality of prefabricated components is more stable and reliable, reducing quality issues caused by the construction environment and human factors, and ensuring the quality of the entire structure. The upper and lower fixings extend a certain distance from the column to secure the upper and lower ring plates, ensuring not only the shear strength of the beam-column connection node but also reliable bending strength. Therefore, this arrangement can significantly reduce the workload on the construction site, improve work efficiency and quality, and provide high reliability and good stability.

[0017] The beam and steel column connection method described in the present invention, through standardized preparation of prefabricated steel columns and beams, especially the pre-bending design of the ends of the longitudinal reinforcement of the beams, can quickly achieve the alignment and installation of the beam body and the steel columns on site, reducing the large amount of welding, anchoring or complex docking processes in traditional construction. By temporarily supporting the fixed position of the beam body, human errors and repeated adjustments during the construction process are reduced, greatly improving the installation efficiency. At the same time, since most of the connecting parts have been prefabricated in the factory, on-site operations rely more on assembly rather than on-site processing, making it easier to achieve standardized and controllable project quality, avoiding the quality instability caused by fluctuations in the construction environment and personnel level; in the installation process, the present invention adopts a multi-level reinforcement method of ring beam stirrups, reinforcing stirrups, and circumferential stirrups, so that a multi-directional synergistic effect is formed between the upper and lower ring plates, longitudinal reinforcements, and steel columns, effectively dispersing and transmitting loads in all directions. The ring beam stirrups can improve the shear strength of the node, the reinforcing stirrups provide direct tension in the vertical direction, and the circumferential stirrups enhance the torsional rigidity of the overall frame. This multi-level, multi-directional reinforcement system significantly improves the overall stability, bending resistance and seismic resistance of the connection nodes, reduces the risk of premature failure of the nodes due to local stress concentration, and improves the durability and safety of the beam-column system under complex loads. In this method, the node inspection and adjustment steps are strictly regulated, including the use of non-destructive testing technologies such as ultrasonic and magnetic powder for quality acceptance to ensure that there are no welding defects, misalignment or looseness at each connection, thereby reducing potential hidden dangers. At the same time, by clarifying the strength conditions for concrete pouring and temporary support removal, the overall bearing capacity of the connection nodes after the concrete solidifies is guaranteed. After the overall construction is completed, the structural nodes have a longer service life and stronger fatigue resistance, which reduces the frequency and cost of maintenance in the subsequent operation stage. The overall solution improves construction convenience while achieving higher long-term reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A three-dimensional diagram of the connection structure between the beam and the steel column in an embodiment of the present invention; Figure 2 It is a cross-sectional view of the connection structure between the beam and the steel column in an embodiment of the present invention.

[0020] In the figure: 101-prefabricated steel column; 102-beam; 1-upper ring plate; 2-lower ring plate; 3-upper fixing piece; 4-lower fixing piece; 41-shear part; 42-fixing part; 5-reinforcement plate; 6-ring beam stirrups; 7-top longitudinal reinforcement; 8-bottom longitudinal reinforcement; 9-reinforcement stirrups; 10-circumferential stirrups. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The purpose of the present invention is to provide a connection structure between beams and steel columns and a connection method thereof to solve the problems existing in the prior art, which can greatly reduce the workload on the construction site, improve work efficiency and work quality, and have high reliability and good stability.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-Figure 2As shown, the present invention provides a connection structure between a beam and a steel column, comprising a prefabricated steel column 101 and a beam 102, the prefabricated steel column 101 comprising a column body, an upper ring plate 1, a lower ring plate 2, an upper fixing member 3 and a lower fixing member 4, one end of the upper fixing member 3 is fixedly connected to the column body, and the other end is fixedly connected to the upper ring plate 1, one end of the lower fixing member 4 is fixedly connected to the column body, and the other end is fixedly connected to the lower ring plate 2, and there are gaps between the upper ring plate 1 and the lower ring plate 2 and the column body, the upper ring plate 1 and the lower ring plate 2 are both vertically arranged around the column body, the beam 102 is perpendicular to and fixedly connected to the prefabricated steel column 101, the beam 102 is provided with beam longitudinal reinforcement, the ends of the beam longitudinal reinforcement are bent to extend into the gap between the upper ring plate 1 and the column body. The prefabricated steel columns 101 are standardized and manufactured in the factory. The dimensions and connection methods of each component are precisely designed. At the construction site, it is only necessary to bend the ends of the longitudinal reinforcement of the beam and directly insert them into the gap between the upper ring plate 1 and the column for installation and fixation. There is no need for complicated on-site welding or bolt connection operations, which greatly simplifies the construction process and improves construction efficiency. Moreover, since most components are prefabricated in the factory, the quality of the production process can be effectively monitored. Compared with on-site production, the quality of prefabricated components is more stable and reliable, reducing quality problems caused by the construction environment, human factors, etc., and ensuring the quality of the entire structure. The upper fixing parts 3 and the lower fixing parts 4 extend a certain length relative to the column to fix the upper ring plate 1 and the lower ring plate 2, which not only ensures the shear strength of the connection node between the beam and the steel column, but also provides reliable bending strength. Therefore, this setting can greatly reduce the workload on the construction site, improve work efficiency and work quality, and has high reliability and good stability.

[0025] In some embodiments, multiple upper fixing members 3 and lower fixing members 4 are provided along the circumference of the column and are arranged perpendicular to the column. The provision of multiple fixing members increases the number of connection points between the upper ring plate 1, the lower ring plate 2 and the column, making the connection between the various components of the prefabricated steel column 101 tighter and stronger, and enhancing the integrity of the entire prefabricated steel column 101 structure. It can also make the force from the beam received by the upper ring plate 1 and the lower ring plate 2 be evenly transferred to the column, which can avoid stress concentration in local areas, ensure that the entire column is more evenly stressed in all directions, and improve the bearing capacity and stability of the structure. In a complex stress environment, such as the multi-dimensional force generated during an earthquake, such circumferentially evenly arranged fixing members can make the prefabricated steel column 101 coordinated from multiple angles, better cope with forces in different directions, and reduce the risk of damage to the structure due to excessive local stress.

[0026] It should be noted that, only one upper fixing member 3 and one lower fixing member 4 can be provided, and they can be provided as an annular plate to fix the upper ring plate 1 and the lower ring plate 2 on the column.

[0027] In some embodiments, two upper ring plates 1 are provided along the radial direction of the column, with a gap between the two upper ring plates 1; two lower ring plates 2 are provided along the radial direction of the column, with a gap between the two lower ring plates 2. The gap between the two ring plates can play a certain buffering role, so that the structure can maintain a good load-bearing capacity in different stress stages. The area setting of the upper ring plates 1 and the lower ring plates 2 can be determined by the following formula: ; ; ; ; Where: , H, t—area, height, and thickness of the upper and lower ring plates respectively; —Bending moments at both ends of the frame beam calculated from the actual reinforcement configuration of the concrete beam; —Design value of tensile strength of upper and lower ring plates; —The force arm from the point of action of the combined force of the upper and lower ring plates in tension to the combined force point in the compression zone is taken as ; —Height of the ring beam section; —Effective height of the ring beam section; — Shear-ring ratio, i.e., the ratio of the nominal tension of the ring beam stirrups to the nominal tension of the upper and lower ring plates of the ring beam, can be taken as 0.35-0.7; —Radius of steel pipe; —Ring beam radius: The radial distance from the edge of the ring beam to the center of the steel pipe; —Width of the frame beam connected to the ring beam; —The angle formed by the longitudinal reinforcement of the beam between the upper ring plate and the column reflects the inclination angle of the longitudinal reinforcement entering the annular joint after bending. It is generally determined according to the spatial relationship between the beam and the column, and the value range is 20°~45°; 、 : Respectively represent the angles formed between the upper and lower ring plate sections and the beam centerline when arranged circumferentially, is the eccentric angle of the upper ring plate, is the eccentric angle of the lower ring plate, and the two together determine the range of action of the ring plate on the restraint force of the longitudinal reinforcement; In some embodiments, the connection structure between the beam and the steel column also includes ring beam stirrups 6. Multiple ring beam stirrups 6 are arranged along the circumference of the upper ring plate 1. The ring beam stirrups 6 are used to clamp the two upper ring plates 1 and the two lower ring plates 2 together. The ring beam stirrups 6 mainly bear the shear force transmitted from the beam. Multiple ring beam stirrups 6 are arranged along the circumference of the upper ring plate 1 and clamp the upper ring plate 1 and the lower ring plates 2 together, tightly connecting the two upper ring plates 1 and the two lower ring plates 2 together, allowing the ring plates to work together when subjected to force, avoiding local deformation or displacement of a single ring plate, thereby enhancing the integrity and stability of the ring plate structure. The cross-sectional area of ​​a single-limb ring beam stirrup 6 can be determined by the following formula: ; ; Where: —Area of ​​single stirrup of ring beam stirrups; —Design value of tensile strength of stirrups; — width of ring beam; —Number of closing hoops; — Angle between stirrups (radians); S—the spacing of stirrups in the centerline of the ring beam; : is the stirrup configuration coefficient, which is used to correct the actual stress efficiency of stirrups under different structural arrangements. The value range is 0.65~0.85. In this embodiment, the recommended value of 0.7 in the structural design code is included; f: the design value of the shear force transferred from the concrete beam where the longitudinal reinforcement is located to the stirrups, in N; In some embodiments, the beam-to-steel column connection structure further includes a reinforcing hoop 9, one end of which is fixed to the middle portion of the ring beam stirrup 6 between the two upper ring plates 1, and the other end is fixed to the middle portion of the ring beam stirrup 6 between the two lower ring plates 2. The reinforcing hoop 9 connects the middle portions of the ring beam stirrups 6 between the upper and lower ring plates 1, 2, forming a direct tension structure in the vertical direction. This effectively resists vertical tensile and compressive forces, prevents relative displacement between the upper and lower ring plates 1, 2 under vertical loads, and thereby improves the vertical stability of the entire connection structure. When the structure is subjected to horizontal force or torsional force, the reinforcing hoop 9 can limit the displacement between the upper ring plate 1 and the lower ring plate 2, thereby enhancing the structure's shear resistance in the horizontal direction. Moreover, by more effectively transmitting and dispersing the force between the upper ring plate 1 and the lower ring plate 2, the risk of local shear failure is reduced, and the overall seismic performance of the structure is improved. The provision of the reinforcing hoop 9 changes the force transmission path in the structure, allowing a portion of the force to be transmitted from the beam to the upper ring plate 1, and then directly transmitted to the lower ring plate 2 through the reinforcing hoop 9, thereby avoiding the indirect transmission of force entirely relying on the ring beam stirrup 6. This helps to optimize the internal force distribution within the structure and make the force on each part of the structure more reasonable. In the absence of the reinforcing hoop 9, local stress concentration may occur at the connection between the upper ring plate 1 and the lower ring plate 2 and the ring beam stirrup 6, which can easily lead to fatigue failure under long-term stress. The presence of the reinforcing hoop 9 can share part of the force, reduce the stress concentration at the connection, and thus improve the durability and service life of the structure.

[0028] In some embodiments, the beam-to-column connection structure further includes circumferential stirrups 10, which are used to connect the plurality of ring beam stirrups 6. The circumferential stirrups 10 connect the plurality of ring beam stirrups 6, forming a tighter stirrup network, making the stirrup system of the entire connection structure more complete and stable, thereby enhancing the overall performance of the structure.

[0029] In some embodiments, the upper fixing member 3 includes a shear-resistant portion 41 and a fixing portion 42, which are fixedly connected to the shear-resistant portion 41, the height of the shear-resistant portion 41 is greater than the height of the fixing portion 42, and is used to be fixedly connected to the column, the smaller diameter of the two upper ring plates 1 is fixedly set at the connection between the corresponding fixing portion 42 and the shear-resistant portion 41, and the larger diameter of the two upper ring plates 1 is fixedly set at the end of the corresponding fixing portion 42 away from the shear-resistant portion 41, the lower fixing member 4 includes a shear-resistant portion 41 and a fixing portion 42, the shear-resistant portion 41 and the fixing portion 42 are fixedly connected, the height of the shear-resistant portion 41 is greater than the height of the fixing portion 42, and is used to be fixedly connected to the column, the smaller diameter of the two lower ring plates 2 is fixedly set at the connection between the corresponding fixing portion 42 and the shear-resistant portion 41, and the larger diameter of the two lower ring plates 2 is fixedly set at the end of the corresponding fixing portion 42 away from the shear-resistant portion 41. The height of the shear portion 41 is greater than that of the fixed portion 42. When the structure is subjected to shear force, the larger shear portion 41 can provide a larger shear area and stronger shear stiffness. When external force attempts to cause relative shear movement between the beam and the column, the shear portion 41 can effectively resist this shear force, thereby improving the shear performance of the connection structure and reducing the risk of structural failure due to shear damage.

[0030] In some embodiments, the connection structure between the beam and the steel column further includes a reinforcement plate 5, which is horizontally arranged around the column and fixedly connected to the column. The top of the shear portion 41 is fixedly connected to the bottom of the reinforcement plate 5 and extends along the width of the reinforcement plate 5. The top of the shear portion 41 is connected to the reinforcement plate 5, and when the structure is subjected to shear force, the reinforcement plate 5 can provide additional support for the shear portion 41. Through this connection method, the shear force can be more effectively transferred from the shear portion 41 to the reinforcement plate 5, and then the reinforcement plate 5 distributes the force to the column, which can improve the shear resistance of the entire connection structure, reduce the risk of structural damage due to shear force, and increase structural stability.

[0031] In some embodiments, the beam longitudinal reinforcement includes top longitudinal reinforcement 7 and bottom longitudinal reinforcement 8. The top longitudinal reinforcement 7 is located above the upper ring plate 1 and has its end bent to extend into the gap. The bottom longitudinal reinforcement 8 is located above the lower ring plate 2 and is configured to extend into the gap. The top longitudinal reinforcement 7 and the bottom longitudinal reinforcement 8 are located at the upper and lower portions of the beam, respectively. The end of the top longitudinal reinforcement 7 is bent and extends into the gap between the upper ring plate 1 and the column, while the bottom longitudinal reinforcement 8 extends into the gap between the lower ring plate 2 and the column. When the beam is subjected to bending moment, the top longitudinal reinforcement 7 and the bottom longitudinal reinforcement 8 can work together, with the top longitudinal reinforcement 7 being subjected to tension and the bottom longitudinal reinforcement 8 being subjected to compression. This can effectively improve the bending resistance of the beam and enable the beam to maintain good load-bearing performance under bending loads. When the beam is subjected to shear force, the longitudinal reinforcement can transmit the shear force to the entire structural system through the connection with the upper ring plate 1, the lower ring plate 2, and the column. This can avoid damage caused by the shear force being concentrated in a single part of the beam and enhance the shear stability of the beam under complex load conditions.

[0032] In some embodiments, the beam 102 further includes stirrups, which stirrup the top longitudinal bars 7 and the bottom longitudinal bars 8. The provision of stirrups can maintain the positions of the top longitudinal bars 7 and the bottom longitudinal bars 8 and can improve the bending and shear bearing capacities.

[0033] A method for connecting a beam and a steel column comprises the following steps: S1. Preparation of prefabricated steel columns: Provide a prefabricated steel column comprising a column body, an upper ring plate, a lower ring plate, an upper fixing member, and a lower fixing member. One end of the upper fixing member is fixedly connected to the column body and the other end is fixedly connected to the upper ring plate. One end of the lower fixing member is fixedly connected to the column body and the other end is fixedly connected to the lower ring plate. There should be gaps between the upper and lower ring plates and the column body. The upper and lower ring plates are both vertically arranged around the column body. Inspect the connection integrity, dimensions, and quality of each component to ensure compliance with design requirements. S2. Beam Preparation: Provide a beam with longitudinal reinforcement, including top and bottom longitudinal reinforcement. Bend the ends of the top longitudinal reinforcement to form a bent section at a preset angle. Maintain the bottom longitudinal reinforcement at an appropriate length to fit between the upper ring plate and the column, and between the lower ring plate and the column. Check that the longitudinal reinforcement arrangement, stirrup installation, and steel bar cover thickness meet specifications. S3. Alignment and installation of beams and prefabricated steel columns: Use hoisting equipment to lift the beams to the corresponding positions of the prefabricated steel columns, control the horizontality and verticality of the beams, accurately align the bent ends of the top longitudinal reinforcements with the gap between the upper ring plate and the columns, and align the extended portions of the bottom longitudinal reinforcements with the gap between the lower ring plate and the columns; S4. Insertion and temporary fixation of longitudinal reinforcement: Insert the bent end of the top longitudinal reinforcement into the gap between the upper ring plate and the column, and insert the extended section of the bottom longitudinal reinforcement into the gap between the lower ring plate and the column, so as to form a preliminary connection between the longitudinal reinforcement of the beam and the prefabricated steel column; use temporary supports to fix the position of the beam to ensure that the beam does not move during subsequent processes; S5. Installation of ring beam stirrups: Install multiple ring beam stirrups along the circumference of the upper ring plate to clamp the two upper ring plates and the two lower ring plates together to ensure that the ring plates can work together when subjected to force and prevent local deformation; S6. Installation of reinforcing hoops and circumferential stirrups: Install reinforcing hoops with one end fixed to the middle of the ring beam stirrups between the two upper ring plates and the other end fixed to the middle of the ring beam stirrups between the two lower ring plates to form a vertical reinforcement system. Install circumferential stirrups to connect multiple ring beam stirrups to form a complete stirrup network and enhance overall stability. S7. Inspection and adjustment of connection nodes: Check the shear and bending performance of the connection nodes between beams and prefabricated steel columns, and check the installation quality of the ring beam stirrups, reinforcing stirrups, and circumferential stirrups to see if there is any looseness, misalignment, or poor welding. Adjust or rework any problems that exist. S8. Subsequent construction and acceptance: Pour and maintain concrete in areas where concrete pouring is required; remove temporary supports after the concrete strength reaches the design requirements; conduct overall structural acceptance, including node stiffness, beam-column verticality, steel bar protective layer, welding quality, overall stability and other indicators, to ensure that the design and specification requirements are met.

[0034] In S2, the bending angle of the top longitudinal reinforcement is 90° to 135°, and the elongation length of the bottom longitudinal reinforcement is greater than 20 cm to ensure a reliable anchorage length; In S5, the spacing of the ring beam stirrups is 10 cm to 20 cm, and a closed stirrup arrangement is used; In S6, the reinforcement hoops are distributed at equal intervals, and the connection points are connected by full welding or high-strength bolts; In S7, node inspection uses a combination of ultrasonic testing, magnetic particle testing, or visual inspection; In S8, the temporary support is removed after the concrete reaches more than 75% of the design strength.

[0035] The beam and steel column connection method described in the present invention, through standardized preparation of prefabricated steel columns and beams, especially the pre-bending design of the ends of the longitudinal reinforcement of the beams, can quickly achieve the alignment and installation of the beam body and the steel columns on site, reducing the large amount of welding, anchoring or complex docking processes in traditional construction. By temporarily supporting the fixed position of the beam body, human errors and repeated adjustments during the construction process are reduced, greatly improving the installation efficiency. At the same time, since most of the connecting parts have been prefabricated in the factory, on-site operations rely more on assembly rather than on-site processing, making it easier to achieve standardized and controllable project quality, avoiding the quality instability caused by fluctuations in the construction environment and personnel level; in the installation process, the present invention adopts a multi-level reinforcement method of ring beam stirrups, reinforcing stirrups, and circumferential stirrups, so that a multi-directional synergistic effect is formed between the upper and lower ring plates, longitudinal reinforcements, and steel columns, effectively dispersing and transmitting loads in all directions. The ring beam stirrups can improve the shear strength of the node, the reinforcing stirrups provide direct tension in the vertical direction, and the circumferential stirrups enhance the torsional rigidity of the overall frame. This multi-level, multi-directional reinforcement system significantly improves the overall stability, bending resistance and seismic resistance of the connection nodes, reduces the risk of premature failure of the nodes due to local stress concentration, and improves the durability and safety of the beam-column system under complex loads. In this method, the node inspection and adjustment steps are strictly regulated, including the use of non-destructive testing technologies such as ultrasonic and magnetic powder for quality acceptance to ensure that there are no welding defects, misalignment or looseness at each connection, thereby reducing potential hidden dangers. At the same time, by clarifying the strength conditions for concrete pouring and temporary support removal, the overall bearing capacity of the connection nodes after the concrete solidifies is guaranteed. After the overall construction is completed, the structural nodes have a longer service life and stronger fatigue resistance, which reduces the frequency and cost of maintenance in the subsequent operation stage. The overall solution improves construction convenience while achieving higher long-term reliability.

[0036] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A connection structure between a beam and a steel column, characterized in that: include A prefabricated steel column, comprising a column, an upper ring plate, a lower ring plate, an upper fixing member, and a lower fixing member, wherein the upper ring plate and the lower ring plate are both vertically arranged around the column, and there is a gap between the upper ring plate, the lower ring plate, and the column, one end of the upper fixing member is fixedly connected to the column, and the other end is fixedly connected to the upper ring plate, and one end of the lower fixing member is fixedly connected to the column, and the other end is fixedly connected to the lower ring plate; The beam is perpendicular to and fixedly connected to the prefabricated steel column. The beam is provided with longitudinal reinforcement along its length. The ends of the longitudinal reinforcement are bent and can extend into the gap between the upper ring plate and the column.

2. The connection structure between beams and steel columns according to claim 1, characterized in that: A plurality of the upper fixing members and the lower fixing members are provided along the circumference of the column and are arranged perpendicular to the column.

3. The connection structure between beams and steel columns according to claim 1, characterized in that: Two upper ring plates are provided along the radial direction of the column, and there is a gap between the two upper ring plates; Two lower ring plates are provided along the radial direction of the column, and a gap exists between the two lower ring plates.

4. The connection structure between beams and steel columns according to claim 3, characterized in that: It also includes ring beam stirrups, which are multiple and arranged along the circumference of the upper ring plate, and are used to clamp the two upper ring plates and the two lower ring plates.

5. The connection structure between beams and steel columns according to claim 4, characterized in that: It also includes a reinforcement hoop, one end of which is fixed to the middle part of the ring beam stirrup between the two upper ring plates, and the other end is fixed to the middle part of the ring beam stirrup between the two lower ring plates.

6. The connection structure between beams and steel columns according to claim 4, characterized in that: It also includes circumferential stirrups, which are used to connect multiple ring beam stirrups.

7. The connection structure between beams and steel columns according to claim 3, characterized in that: The upper fixing member includes a shearing portion and a fixing portion, the shearing portion and the fixing portion are fixedly connected, the height of the shearing portion is greater than the height of the fixing portion, and is used to be fixedly connected to the column, the smaller diameter of the two upper ring plates is fixedly provided at the connection between the corresponding fixing portion and the shearing portion, and the larger diameter of the two upper ring plates is fixedly provided at one end of the corresponding fixing portion away from the shearing portion; The lower fixing member includes a shear-resistant portion and a fixing portion, the shear-resistant portion and the fixing portion are fixedly connected, the height of the shear-resistant portion is greater than the height of the fixing portion, and is used to be fixedly connected to the column, the smaller diameter of the two lower ring plates is fixedly arranged at the connection between the corresponding fixing portion and the shear-resistant portion, and the larger diameter of the two lower ring plates is fixedly arranged at the end of the corresponding fixing portion away from the shear-resistant portion.

8. The connection structure between beams and steel columns according to claim 7, characterized in that: The cam is secured to the bottom of the frame and has a plurality of side rails, each of which is secured to a position adjacent to the frame by a spring, and has a plurality of side rails, each of which is secured to the bottom of the frame by a spring. The cam is secured to the bottom of the frame by a spring, and has a plurality of side rails, each of which is secured to the bottom of the frame by a spring.

9. A method for connecting a beam and a steel column, applicable to a connection structure of a beam and a steel column according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Preparation of prefabricated steel columns: Provide a prefabricated steel column comprising a column body, an upper ring plate, a lower ring plate, an upper fixing member, and a lower fixing member. One end of the upper fixing member is fixedly connected to the column body and the other end is fixedly connected to the upper ring plate. One end of the lower fixing member is fixedly connected to the column body and the other end is fixedly connected to the lower ring plate. There should be gaps between the upper and lower ring plates and the column body. The upper and lower ring plates are both vertically arranged around the column body. Inspect the connection integrity, dimensions, and quality of each component to ensure compliance with design requirements. S2. Beam Preparation: Provide a beam with longitudinal reinforcement, including top and bottom longitudinal reinforcement. Bend the ends of the top longitudinal reinforcement to form a bent section at a preset angle. Maintain the bottom longitudinal reinforcement at an appropriate length to fit between the upper ring plate and the column, and between the lower ring plate and the column. Check that the longitudinal reinforcement arrangement, stirrup installation, and steel bar cover thickness meet specifications. S3. Alignment and installation of beams and prefabricated steel columns: Use hoisting equipment to lift the beams to the corresponding positions of the prefabricated steel columns, control the horizontality and verticality of the beams, accurately align the bent ends of the top longitudinal reinforcements with the gap between the upper ring plate and the columns, and align the extended portions of the bottom longitudinal reinforcements with the gap between the lower ring plate and the columns; S4. Insertion and temporary fixation of longitudinal reinforcement: Insert the bent end of the top longitudinal reinforcement into the gap between the upper ring plate and the column, and insert the extended section of the bottom longitudinal reinforcement into the gap between the lower ring plate and the column, so as to form a preliminary connection between the longitudinal reinforcement of the beam and the prefabricated steel column; use temporary supports to fix the position of the beam to ensure that the beam does not move during subsequent processes; S5. Installation of ring beam stirrups: Install multiple ring beam stirrups along the circumference of the upper ring plate to clamp the two upper ring plates and the two lower ring plates together to ensure that the ring plates can work together when subjected to force and prevent local deformation; S6. Installation of reinforcing hoops and circumferential stirrups: Install reinforcing hoops with one end fixed to the middle of the ring beam stirrups between the two upper ring plates and the other end fixed to the middle of the ring beam stirrups between the two lower ring plates to form a vertical reinforcement system. Install circumferential stirrups to connect multiple ring beam stirrups to form a complete stirrup network and enhance overall stability. S7. Inspection and adjustment of connection nodes: Check the shear and bending performance of the connection nodes between beams and prefabricated steel columns, and check the installation quality of the ring beam stirrups, reinforcing stirrups, and circumferential stirrups to see if there is any looseness, misalignment, or poor welding. Adjust or rework any problems that exist. S8. Subsequent construction and acceptance: Pour and maintain concrete in areas where concrete pouring is required; remove temporary supports after the concrete strength reaches the design requirements; conduct overall structural acceptance, including node stiffness, beam-column verticality, steel bar protective layer, welding quality, and overall stability indicators, to ensure that the design and specification requirements are met.

10. The method for connecting a beam and a steel column according to claim 9, characterized in that: In S2, the bending angle of the top longitudinal reinforcement is 90° to 135°, and the elongation length of the bottom longitudinal reinforcement is greater than 20 cm to ensure a reliable anchorage length; In said S5, the spacing of the ring beam stirrups is 10 cm to 20 cm, and a closed stirrup arrangement is adopted; In the above S6, the reinforcement hoops are distributed at equal intervals, and the connection points are connected by full welding or high-strength bolts; In said S7, the node inspection adopts a combination of ultrasonic testing, magnetic particle testing or visual inspection; In the above-mentioned S8, the temporary support is removed after the concrete reaches more than 75% of the design strength.

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